Expandable server cabinet

Abstract

An expandable cabinet allows for the storing and positioning of electrical component boxes of different lengths. One or more expansion brackets are capable of being secured by one or more brace guides at fixed positions relative to a rear corner post or posts and the back portion of the cabinet fame. An expanded space is formed between a back door and back portion of the cabinet frame when the expansion brackets are extended in a rearward direction from the rear corner post or posts, enabling the expansion cabinet to accommodate electrical component boxes that are too large to fit within the cabinet frame. One or more box mounts are also installed within the cabinet at or near the rear corner posts and near the expanded space. Each box mount engages and positions a component box with respect to the back portion of the cabinet frame.

1 . An expandable cabinet for storing and positioning electrical component boxes of different lengths, said expandable cabinet comprising: 
 a cabinet having a cabinet frame, said cabinet frame having a front portion, a back portion, a top, a base and rear corner posts positioned at about said back portion of said cabinet frame, said rear corner posts extending from about said base, at least one of said rear corner posts having at least one brace guide;    an expansion bracket mounted on said at least one said brace guide, each expansion bracket having a protruding end extending in a rearward direction from a rear corner post, at least one of said expansion brackets capable of being secured in at least one of a plurality of positions relative to said rear corner post;    a door hinge mounted behind said back portion of said cabinet frame in a manner so as to move with at least one said expansion bracket, a back door mounted on said door hinge in a position to extend across said back portion of said cabinet frame to form an expanded space of said expandable cabinet when said at least one expansion bracket is extended in a rearward direction from said rear corner post; and    at least one box mount positioned in a horizontal position with respect to at least one of said rear corner posts, each said at least one box mount configured to engage an electrical component box and position the box in at least one of a plurality of positions within said expandable cabinet.    
     
     
         2 . The expandable cabinet of  claim 1  further comprising: 
 a door frame connected to each said protruding end of each said expansion bracket; and  
 said door being mounted with said door hinge on said protruding end of at least one of said expansion brackets, said door having a top brace, a bottom brace, and two side rails, each said side rail extending from said top brace to said bottom brace.  
 
     
     
         3 . The expandable cabinet of  claim 1  further comprising: 
 a door frame connected to each said protruding end of each said expansion bracket; and  
 said door further comprising a top brace, a bottom brace, and two side rails, each said side rail extending from said top brace to said bottom brace, one of said side rails of said door being pivotally mounted with said hinge on at least one of said expansion brackets.  
 
     
     
         4 . The expandable cabinet of  claim 1  further comprising: 
 a door frame mounted to each said protruding end of each said expansion bracket, said door having a top brace, a bottom brace, and two side rails, each said side rail extending from said top brace to said bottom brace, one of said side rails being pivotally mounted to said door hinge; and  
 a door grille, said door grille extending between said top brace and said bottom brace of said door, said door grille being sufficiently perforated to allow cooling air to pass through said door.  
 
     
     
         5 . The expandable cabinet of  claim 1  further comprising: 
 a cover, said cover having a main section positioned at said top of said cabinet frame and a free member;  
 a pair of channels extending into said main section of said cover, each of said channels opening at about said back portion of said cabinet frame; and  
 a pair of alignment legs, each of said alignment legs being positioned in a manner so as to move with said free member of said cover, each of said alignment legs extending into one of said channels of said main section of said cover, said alignment legs being configured to reciprocate within said channels.  
 
     
     
         6 . The expandable cabinet of  claim 1  further comprising: 
 a cover, said cover having a main section positioned at said top of said cabinet frame and a free member;  
 a pair of channels extending into said main section of said cover, each of said channels opening at about said back portion of said cabinet frame;  
 a pair of alignment legs, each of said alignment legs being positioned in a manner so as to move with said free member of said cover, each of said alignment legs extending into one of said channels of said main section of said cover, said alignment legs being configured to reciprocate within said channels; and  
 a cover expansion gap being defined as the clearance between said main section and said free member of said cover when said main section and said free member are moved apart from each other.  
 
     
     
         7 . The expandable cabinet of  claim 1  further comprising: 
 a lower pair of expansion brackets slidably mounted on said brace guides at a location that is proximate said base of said cabinet frame;  
 a top pair of expansion brackets slidably mounted on said brace guides at a location that is proximate said cover of said cabinet frame; and  
 a midpoint pair of expansion brackets slidably mounted on said brace guides at a location that is between said pair of lower expansion brackets and said pair of top expansion brackets, said midpoint expansion brackets having locking notches for locking said door frame at predetermined positions relative to said brace guide, thereby locating said lower expansion brackets, said midpoint expansion brackets, and said top expansion brackets in positions relative to said rear corner posts.  
 
     
     
         8 . The expandable cabinet of  claim 1  further comprising a door frame mounted to each said protruding end of each said expansion bracket wherein said door frame causes each of said expansion brackets to move in unison during expansion or contraction of said cabinet.  
     
     
         9 . The expandable cabinet of  claim 1  further comprising a door frame mounted to each said protruding end of each said expansion bracket, said door frame having a slip joint positioned to 
 allow for alignment of said expansion brackets during expansion or contraction of said cabinet.  
 
     
     
         10 . The expansion cabinet of  claim 1  further comprising side panels positioned along either side of said cabinet and extending from about said front portion to about said back portion of said cabinet and also extending from about said base to about said top of said cabinet.  
     
     
         11 . The expandable cabinet of  claim 1  further comprising filler panels extending from about said back portion of said cabinet to about said protruding ends of said expansion brackets and also extending from about said base to about said top of said cabinet when said cabinet has been expanded.  
     
     
         12 . The expandable cabinet of  claim 1  further comprising a door frame positioned on said protruding ends of said expansion brackets and positioned to move with said expansion brackets, said cover comprising: 
 a main section positioned at said top of said cabinet frame, said main section having a ventilation passage to allow air to pass freely into and out of said cabinet; and  
 a free member positioned above said door frame, said free member being positioned to move with said door frame.  
 
     
     
         13 . The expandable cabinet of  claim 1  further comprising a front door pivotally mounted to said front portion of said cabinet frame, said front door being sized to allow for the installation of an electrical component box through said front portion of said cabinet.  
     
     
         14 . The expandable cabinet of  claim 1 , said cabinet having a support base and further comprising: 
 a front door pivotally mounted to said front portion of said cabinet frame, said front door being sized to allow for the installation of an electrical component box through said front portion of said cabinet; and    a stabilizer reciprocally connected to said cabinet, said stabilizer leg being extendable from said cabinet and having a length that is sufficiently long to expand the support base of the cabinet when said stabilizer leg is extended.    
     
     
         15 . The expandable cabinet of  claim 1 , said cabinet having a support base and further comprising: 
 a front door pivotally mounted to said front portion of said cabinet frame, said front door being sized to allow for the installation of an electrical component box through said front portion of said cabinet;    a stabilizer having at least one stabilizer leg reciprocally connected to said cabinet, said stabilizer leg being extendable from said cabinet and having a length that is sufficiently long to expand the support base of the cabinet when said stabilizer leg is extended;    said front door being configured to engage and extend said stabilizer from the cabinet as said front door is opened from a closed position, said stabilizer expanding the support base of the cabinet when said stabilizer leg is extended;    said front door being configured to disengage said stabilizer when said stabilizer has been fully extended and said front door continues to be opened further; and    said front door being configured to again engage and retract said stabilizer when said front door is returned to a closed position from an open position.    
     
     
         16 . The expandable cabinet of  claim 1  further comprising: 
 a plurality of locking notches positioned along said expansion brackets for locking said door frame at predetermined incremental positions relative to said brace guide; and  
 at least one lock pin mounted in at least one of said brace guides, said lock pin being positioned to engage said internal notches of at least one of said expansion brackets when said at least one of said expansion brackets slides into one of said predetermined incremental positions.  
 
     
     
         17 . The expandable cabinet of  claim 1  wherein: 
 each said box mount comprises a T-bone bracket, each said T-bone bracket having a mounting rail for engaging an electrical component box and a box mount slot extending along a substantial portion of the length of said box mount, each said T-bone bracket being adjustable for positioning in a plurality of positions within said expandable cabinet; and  
 at least one adjustable guide pin is mounted on each of said rear corner posts, each of said guide pins being configured to extend through one of said box mount slots to connect one of said T-bone brackets to one of said rear corner posts, each said guide pin being configured to secure one of said T-bone brackets in a fixed position within said expandable cabinet.  
 
     
     
         18 . The expandable cabinet of  claim 1  wherein: 
 each said box mount comprises a T-bone bracket, said T-bone bracket having a mounting rail for engaging an electrical component box and a box mount slot extending along a substantial portion of the length of said box mount, said T-bone bracket being adjustable for positioning in a plurality of positions within said expandable cabinet; and  
 at least one adjustable guide pin and at least one washer are provided, said pin having a threaded portion configured to engage one of said rear corner posts and to allow for axial adjustment of said guide pin thereon, each said guide pin being configured to extend through one said washer and through said box mount slot to connect said T-bone bracket to one of said rear corner posts, each said guide pin co-acting with one said washer to lock said T-bone bracket in position when said threaded portion of said guide pin is tightened.  
 
     
     
         19 . The expandable cabinet of  claim 1  further comprising: 
 a door frame connected to each said protruding end of each said expansion bracket;  
 said door being mounted with said door hinge on said protruding end of at least one of said expansion brackets, said door having a top brace, a bottom brace, and two side rails, each said side rail extending from said top brace to said bottom brace; and  
 said door hinge being attached to each said expansion bracket with a mounting screw, said mounting screw having a mounting head that is positioned to be accessible for tightening and loosening when said back door is in an open position and inaccessible from outside the cabinet when said back door is in a closed position.  
 
     
     
         20 . The expandable cabinet of  claim 1  wherein said expansion brackets comprise an extendable sleeve extending along the height of said cabinet, each said corner post having an inside surface that forms one of said brace guides, said expansion brackets having a plurality of vertically spaced expansion bracket slots to permit mounting of said box mounts to said rear corner posts.  
     
     
         21 . The expandable cabinet of  claim 1  wherein said expansion brackets comprise an extendable accordion sleeve extending along the height of said cabinet, each said corner post having an inside surface that forms one of said brace guides, said expansion brackets having a plurality of vertically spaced expansion bracket slots to permit mounting of said box mounts to said rear corner posts.  
     
     
         22 . The expandable cabinet of  claim 1  wherein at least one of said expansion brackets is independently mounted to reciprocate from said rear corner posts.  
     
     
         23 . The expandable cabinet of  claim 1  wherein at least one of said expansion brackets is independently mounted to reciprocate from said rear corner posts, said door having an alignment hole, at least one expansion bracket having an alignment lug extending from said protruding end of said expansion bracket, said alignment lug being configured to engage said alignment hole of said door when said door is in a closed position.  
     
     
         24 . The expandable cabinet of  claim 1  wherein a first of said expansion brackets comprises a sliding plate and plate return and wherein a second of said second expansion brackets comprises a swing plate mounted to said back door, said swing plate being configured to be inserted into a brace guide after expansion of said cabinet.  
     
     
         25 . The expandable cabinet of  claim 1  wherein: 
 a plurality of side panels are positioned along either side of said cabinet and extending from about said front portion to about said back portion of said cabinet and also extending from about said base to about said top of said cabinet;  
 said brace guides are formed between each said rear corner post and said side panels;  
 a first of said expansion brackets comprises a sliding plate and plate return positioned to reciprocate from one of said brace guides; and  
 a second of said expansion brackets comprises a swing plate mounted to said back door, said swing plate being configured to be inserted into one of said brace guides after expansion of said cabinet.  
 
     
     
         26 . The expandable cabinet of  claim 1  further comprising a door frame mounted to at least one said protruding end of one said expansion bracket, at least one said box mount being configured to transfer at least part of the load of an electrical component box to an expansion bracket, at least one said expansion bracket being configured to transfer at least part of the load of at least one said box mount to said door frame, said door frame being configured to support at least part of the loads of said electrical component boxes.  
     
     
         27 . The expandable cabinet of  claim 1  further comprising: 
 a door frame mounted to each said protruding end of each said expansion bracket wherein said door frame causes each of said expansion brackets to move in unison during expansion or contraction of said cabinet; and  
 each said box mount being configured to transfer at least part of the load of an electrical component box to said expansion brackets, each said expansion bracket being configured to transfer at least part of the load of at least one said box mount to said door frame, said door frame being configured to support at least part of the loads of said electrical component boxes.  
 
     
     
         28 . The expandable cabinet of  claim 1  further comprising: 
 a door frame mounted to each said protruding end of each said expansion bracket wherein said door frame causes each of said expansion brackets to move in unison during expansion or contraction of said cabinet; and  
 each said box mount being configured to transfer at least part of the load of an electrical component box to said expansion brackets, each said expansion bracket being configured to transfer at least part of the load of at least one said box mount to said door frame, said door frame being configured to support at least part of the loads of said electrical component boxes independently of said base of said cabinet frame.  
 
     
     
         29 . The expandable cabinet of  claim 1  wherein said box mounts are frictionally mounted on said rear corner posts, said rear corner posts being configured to allow for frictional adjustment and positioning of said box mounts to a plurality of positions within said expandable cabinet.  
     
     
         30 . The expandable cabinet of  claim 1  wherein said box mounts have female dove tail forms having inside surfaces and extending along a substantial portion of the length of said box mounts, said rear corner posts having male dove tail forms that frictionally engage said inside surfaces of said female dove tail forms to create a locking force and to position said box mount within said cabinet.  
     
     
         31 . The expandable cabinet of  claim 1  wherein said box mounts have female dove tail forms having inside surfaces and extending along a substantial portion of the length of said box mounts, said rear corner posts having male dove tail forms that frictionally engage said inside surfaces of said female dove tail forms to create a locking force and to position said box mount within said cabinet, said male dove tail forms providing lineal support against said female dovetail forms for supporting said box mounts.  
     
     
         32 . The expandable cabinet of  claim 1  wherein each said box mount includes a post fitting for attaching said box mount to one of said rear corner posts, said post fitting allowing said box mount to be mounted in only one position within said expandable cabinet when said box mount is mounted within said cabinet.  
     
     
         33 . The expandable cabinet of  claim 1  wherein said box mounts include post fittings for attaching said box mounts to said rear corner posts, spacers for establishing the position in which an electrical component box will be mounted, and mounting rails for engaging and positioning said box mount within said expandable cabinet, said post fittings allowing said box mounts to each be mounted in only one position within said expandable cabinet when said box mounts are mounted within said cabinet.  
     
     
         34 . The expandable cabinet of  claim 1  further comprising: 
 a door frame mounted to at least one said protruding end of one said expansion bracket, said door frame having frame mounting rails extending along the height of said door frame, said door frame being configured to support at least part of the loads of the electrical component boxes; and  
 said box mount having a box attachment rail for engaging one of said frame mounting rails of said door frame, a mounting rail for engaging and positioning an electrical component box, and a spacer for establishing the position in which the electrical component box will be mounted, said box mount being configured to transfer at least part of the load of an electrical component box to said door frame.  
 
     
     
         35 . The expandable cabinet of  claim 1  wherein said box mount comprises a reciprocating arm and a mounting rail, said reciprocating arm extending through said corner post on a support bearing.  
     
     
         36 . The expandable cabinet of  claim 1  wherein said box mount comprises a reciprocating arm and a mounting rail, said reciprocating arm extending through said corner post on a support bearing and having a threaded portion extending through a turning sleeve, said turning sleeve allowing for adjustment of said box mount through said support bearing.  
     
     
         37 . The expandable cabinet of  claim 1  wherein said box mount comprises a reciprocating arm connected to a mounting rail with a slip sleeve, said reciprocating arm extending through said corner post on a support bearing and having a threaded portion extending through a turning sleeve, said turning sleeve allowing for adjustment of said box mount through said support bearing, said slip sleeve allowing said mounting rail to float in an upright position with respect to said rear corner post.  
     
     
         38 . The expandable cabinet of  claim 1  wherein said box mount comprises a reciprocating arm that is adjusted with a worm and rack assembly, said worm and rack assembly having a toothed rack fixed to said reciprocating arm, said toothed rack engaged to a rotating worm that is connected to said rear corner post.  
     
     
         39 . The expandable cabinet of  claim 1  wherein said expansion bracket includes a plurality of notches located at positions along the length of said expansion bracket and each corresponding to one of a plurality of predetermined expansion positions for said expansion bracket, said brace guide including a detent assembly having a detent that is biased to engage said notches of said expansion bracket and to secure said expansion bracket in position when said expansion bracket is in one of the predetermined expansion positions.  
     
     
         40 . The expandable cabinet of  claim 1  wherein said expansion bracket includes a plurality of conical internal recesses located at positions along the length of said expansion bracket and each corresponding to one of a plurality of predetermined expansion positions for said expansion bracket, said brace guide including a lock pin having a conical section and pin threads, said threads allowing said lock pin to be rotated so that said conical section can engage one of said conical internal recesses of said expansion bracket and can secure said expansion bracket in position when said expansion bracket is in one of the predetermined expansion positions.  
     
     
         41 . The expandable cabinet of  claim 1  wherein said expansion bracket includes a gear rack positioned to engage a drive screw, said drive screw being connected to said rear corner post and configured to move said expansion bracket when said drive screw is rotated.  
     
     
         42 . The expandable cabinet of  claim 1  wherein said expansion bracket comprises a male telescoping segment, a female telescoping segment, and a detent groove, said male telescoping segment positioned to reciprocate within said female telescoping segment, said detent groove providing frictional resistance between said male and female telescoping segments to allow for precise positioning of said male telescoping segment.  
     
     
         43 . The expandable cabinet of  claim 1  wherein said brace guide comprises a threaded sleeve extending through said rear corner post, said expansion bracket being threaded along its length and configured to engage said threaded sleeve of said brace guide, said expansion bracket being configured to move against said threaded sleeve of said brace guide when said expansion bracket is rotated.  
     
     
         44 . An expandable cabinet for storing and positioning electrical component boxes of different lengths, said expandable cabinet comprising: 
 a cabinet having a cabinet frame, said cabinet frame having a front portion, a back portion, a base and a pair of rear corner posts positioned at about said back portion of said cabinet frame, said rear corner posts extending from about said base, each of said rear corner posts having at least one brace guide;    an expansion bracket mounted on each said brace guide, each said expansion bracket having a protruding end extending in a rearward direction from a rear corner post, each of said expansion brackets capable of being secured at a plurality of positions relative to said rear corner post;    a door frame connected in fixed relation to the protruding ends of each said expansion bracket;    a door hinge mounted behind said back portion of said cabinet frame in a manner so as to move with at least one said expansion bracket, a back door mounted on said door hinge in a position to extend across said back portion of said cabinet frame to form an expanded space of said expandable cabinet when said at least one expansion bracket is extended in a rearward direction from said rear corner post; and    at least one box mount installed in a horizontal position with respect to each of said rear corner posts that can be varied within the expanded space, each said at least one box mount configured to engage an electrical component box and position the box within said expandable cabinet.    
     
     
         45 . The expandable cabinet of  claim 44  wherein said door has a top brace, a bottom brace, and two side rails, each said side rail extending from said top brace to said bottom brace.  
     
     
         46 . The expandable cabinet of  claim 44  wherein said door has a top brace, a bottom brace, and two side rails, each said side rail extending from said top brace to said bottom brace, one of said side rails of said door being pivotally mounted with said hinge on at least one of said expansion brackets.  
     
     
         47 . The expandable cabinet of  claim 44  wherein said door has a top brace, a bottom brace, two side rails and a door grille, each said side rail extending from said top brace to said bottom brace, one of said side rails being pivotally mounted to said door hinge, said door grille extending between said top brace and said bottom brace of said door, said door grille being sufficiently perforated to allow cooling air to pass through said door.  
     
     
         48 . The expandable cabinet of  claim 44  further comprising: 
 a cover, said cover having a main section positioned at said top of said cabinet frame and a free member;  
 a pair of channels extending into said main section of said cover, each of said channels opening at about said back portion of said cabinet frame; and  
 a pair of alignment legs, each of said alignment legs being positioned in a manner so as to move with said free member of said cover, each of said alignment legs extending into one of said channels of said main section of said cover, said alignment legs being configured to reciprocate within said channels.  
 
     
     
         49 . The expandable cabinet of  claim 44  further comprising: 
 a cover, said cover having a main section positioned at said top of said cabinet frame and a free member;  
 a pair of channels extending into said main section of said cover, each of said channels opening at about said back portion of said cabinet frame;  
 a pair of alignment legs, each of said alignment legs being positioned in a manner so as to move with said free member of said cover, each of said alignment legs extending into one of said channels of said main section of said cover, said alignment legs being configured to reciprocate within said channels; and  
 a cover expansion gap being defined as the clearance between said main section and said free member of said cover when said main section and said free member are moved apart from each other.  
 
     
     
         50 . The expandable cabinet of  claim 44  further comprising: 
 a lower pair of expansion brackets slidably mounted on said brace guides at a location that is proximate said base of said cabinet frame;  
 a top pair of expansion brackets slidably mounted on said brace guides at a location that is proximate said cover of said cabinet frame; and  
 a midpoint pair of expansion brackets slidably mounted on said brace guides at a location that is between said pair of lower expansion brackets and said pair of top expansion brackets, said midpoint expansion brackets having locking notches for locking said door frame at predetermined positions relative to said brace guide, thereby locating said lower expansion brackets, said midpoint expansion brackets, and said top expansion brackets in positions relative to said rear corner posts.  
 
     
     
         51 . The expandable cabinet of  claim 44  wherein said door frame causes each of said expansion brackets to move in unison during expansion or contraction of said cabinet.  
     
     
         52 . The expandable cabinet of  claim 44  wherein said door frame has a slip joint positioned to allow for alignment of said expansion brackets during expansion or contraction of said cabinet.  
     
     
         53 . The expansion cabinet of  claim 44  further comprising side panels positioned along either side of said cabinet and extending from about said front portion to about said back portion of said cabinet and also extending from about said base to about said top of said cabinet.  
     
     
         54 . The expandable cabinet of  claim 44  further comprising filler panels extending from about said back portion of said cabinet to about said protruding ends of said expansion brackets and also extending from about said base to about said top of said cabinet when said cabinet has been expanded.  
     
     
         55 . The expandable cabinet of  claim 44  further comprising a cover, said cover having a main section positioned at said top of said cabinet frame and a free member, said main section having a ventilation passage to allow air to pass freely into and out of said cabinet, said free member being positioned above said door frame to move with said door frame.  
     
     
         56 . The expandable cabinet of  claim 44  further comprising a front door pivotally mounted to said front portion of said cabinet frame, said front door being sized to allow for the installation of an electrical component box through said front portion of said cabinet.  
     
     
         57 . The expandable cabinet of  claim 44 , said cabinet having a support base and further comprising: 
 a front door pivotally mounted to said front portion of said cabinet frame, said front door being sized to allow for the installation of an electrical component box through said front portion of said cabinet; and    a stabilizer reciprocally connected to said cabinet, said stabilizer leg being extendable from said cabinet and having a length that is sufficiently long to expand the support base of the cabinet when said stabilizer leg is extended.    
     
     
         58 . The expandable cabinet of  claim 44 , said cabinet having a support base and further comprising: 
 a front door pivotally mounted to said front portion of said cabinet frame, said front door being sized to allow for the installation of an electrical component box through said front portion of said cabinet;    a stabilizer having at least one stabilizer leg reciprocally connected to said cabinet, said stabilizer leg being extendable from said cabinet and having a length that is sufficiently long to expand the support base of the cabinet when said stabilizer leg is extended;    said front door being configured to engage and extend said stabilizer from the cabinet as said front door is opened from a closed position, said stabilizer expanding the support base of the cabinet when said stabilizer leg is extended;    said front door being configured to disengage said stabilizer when said stabilizer has been fully extended and said front door continues to be opened further; and    said front door being configured to again engage and retract said stabilizer when said front door is returned to a closed position from an open position.    
     
     
         59 . The expandable cabinet of  claim 44  further comprising: 
 a plurality of locking notches positioned along said expansion brackets for locking said door frame at predetermined incremental positions relative to said brace guide; and  
 at least one lock pin mounted in at least one of said brace guides, said lock pin being positioned to engage said internal notches of at least one of said expansion brackets when said at least one of said expansion brackets slides into one of said predetermined incremental positions.  
 
     
     
         60 . The expandable cabinet of  claim 44  wherein: 
 each said box mount comprises a T-bone bracket, each said T-bone bracket having a mounting rail for engaging an electrical component box and a box mount slot extending along a substantial portion of the length of said box mount, each said T-bone bracket being adjustable for positioning in a plurality of positions within said expandable cabinet; and  
 at least one adjustable guide pin is mounted on each of said rear corner posts, each of said guide pins being configured to extend through one of said box mount slots to connect one of said T-bone brackets to one of said rear corner posts, each said guide pin being configured to secure one of said T-bone brackets in a fixed position within said expandable cabinet.  
 
     
     
         61 . The expandable cabinet of  claim 44  wherein: 
 each said box mount comprises a T-bone bracket, said T-bone bracket having a mounting rail for engaging an electrical component box and a box mount slot extending along a substantial portion of the length of said box mount, said T-bone bracket being adjustable for positioning in a plurality of positions within said expandable cabinet; and  
 at least one adjustable guide pin and at least one washer are provided, said pin having a threaded portion configured to engage one of said rear corner posts and to allow for axial adjustment of said guide pin thereon, each said guide pin being configured to extend through one said washer and through said box mount slot to connect said T-bone bracket to one of said rear corner posts, each said guide pin co-acting with one said washer to lock said T-bone bracket in position when said threaded portion of said guide pin is tightened.  
 
     
     
         62 . The expandable cabinet of  claim 44  wherein said door is mounted with said door hinge on said protruding end of at least one of said expansion brackets, said door having a top brace, a bottom brace, and two side rails, each said side rail extending from said top brace to said bottom brace, said door hinge being attached to said expansion bracket with a mounting screw, said mounting screw having a mounting head that is positioned to be accessible for tightening and loosening when said back door is in an open position and inaccessible from outside the cabinet when said back door is in a closed position.  
     
     
         63 . The expandable cabinet of  claim 44  wherein said expansion brackets comprise an extendable sleeve extending along the height of said cabinet, each said corner post having an inside surface that forms one of said brace guides, said expansion brackets having a plurality of vertically spaced expansion bracket slots to permit mounting of said box mounts to said rear corner posts.  
     
     
         64 . The expandable cabinet of  claim 44  wherein said expansion brackets comprise an extendable accordion sleeve extending along the height of said cabinet, each said corner post having an inside surface that forms one of said brace guides, said expansion brackets having a plurality of vertically spaced expansion bracket slots to permit mounting of said box mounts to said rear corner posts.  
     
     
         65 . The expandable cabinet of  claim 44  wherein at least one said box mount is configured to transfer at least part of the load of an electrical component box to an expansion bracket, at least one said expansion bracket being configured to transfer at least part of the load of at least one said box mount to said door frame, said door frame being configured to support at least part of the loads of said electrical component boxes.  
     
     
         66 . The expandable cabinet of  claim 44  wherein said door frame causes each of said expansion brackets to move in unison during expansion or contraction of said cabinet, each said box mount being configured to transfer at least part of the load of an electrical component box to said expansion brackets, each said expansion bracket being configured to transfer at least part of the load of at least one said box mount to said door frame, said door frame being configured to support at least part of the loads of said electrical component boxes.  
     
     
         67 . The expandable cabinet of  claim 44  wherein said door frame causes each of said expansion brackets to move in unison during expansion or contraction of said cabinet, each said box mount being configured to transfer at least part of the load of an electrical component box to said expansion brackets, each said expansion bracket being configured to transfer at least part of the load of at least one said box mount to said door frame, said door frame being configured to support at least part of the loads of said electrical component boxes independently of said base of said cabinet frame.  
     
     
         68 . The expandable cabinet of  claim 44  wherein said box mounts are frictionally mounted on said rear corner posts, said rear corner posts being configured to allow for frictional adjustment and positioning of said box mounts to a plurality of positions within said expandable cabinet.  
     
     
         69 . The expandable cabinet of  claim 44  wherein said box mounts have female dove tail forms having inside surfaces and extending along a substantial portion of the length of said box mounts, said rear corner posts having male dove tail forms that frictionally engage said inside surfaces of said female dove tail forms to create a locking force and to position said box mount within said cabinet.  
     
     
         70 . The expandable cabinet of  claim 44  wherein said box mounts have female dove tail forms having inside surfaces and extending along a substantial portion of the length of said box mounts, said rear corner posts having male dove tail forms that frictionally engage said inside surfaces of said female dove tail forms to create a locking force and to position said box mount within said cabinet, said male dove tail forms providing lineal support against said female dovetail forms for supporting said box mounts.  
     
     
         71 . The expandable cabinet of  claim 44  wherein each said box mount includes a post fitting for attaching said box mount to one of said rear corner posts, said post fitting allowing said box mount to be mounted in only one position within said expandable cabinet when said box mount is mounted within said cabinet.  
     
     
         72 . The expandable cabinet of  claim 44  wherein said box mounts include post fittings for attaching said box mounts to said rear corner posts, spacers for establishing the position in which an electrical component box will be mounted, and mounting rails for engaging and positioning said box mount within said expandable cabinet, said post fittings allowing said box mounts to each be mounted in only one position within said expandable cabinet when said box mounts are mounted within said cabinet.  
     
     
         73 . The expandable cabinet of  claim 44  wherein said door frame has frame mounting rails extending along the height of said door frame, said door frame being configured to support at least part of the loads of the electrical component boxes, said box mount has a box attachment rail for engaging one of said frame mounting rails of said door frame, a mounting rail for engaging and positioning an electrical component box, and a spacer for establishing the position in which the electrical component box will be mounted, said box mount being configured to transfer at least part of the load of an electrical component box to said door frame.  
     
     
         74 . The expandable cabinet of  claim 44  wherein said box mount comprises a reciprocating arm and a mounting rail, said reciprocating arm extending through said corner post on a support bearing.  
     
     
         75 . The expandable cabinet of  claim 44  wherein said box mount comprises a reciprocating arm and a mounting rail, said reciprocating arm extending through said corner post on a support bearing and having a threaded portion extending through a turning sleeve, said turning sleeve allowing for adjustment of said box mount through said support bearing.  
     
     
         76 . The expandable cabinet of  claim 44  wherein said box mount comprises a reciprocating arm connected to a mounting rail with a slip sleeve, said reciprocating arm extending through said corner post on a support bearing and having a threaded portion extending through a turning sleeve, said turning sleeve allowing for adjustment of said box mount through said support bearing, said slip sleeve allowing said mounting rail to float in an upright position with respect to said rear corner post, said mounting rail is attached to an electrical component box.  
     
     
         77 . The expandable cabinet of  claim 44  wherein said box mount comprises a reciprocating arm that is adjusted with a worm and rack assembly, said worm and rack assembly having a toothed rack fixed to said reciprocating arm, said toothed rack engaged to a rotating worm that is connected to said rear corner post.  
     
     
         78 . The expandable cabinet of  claim 44  wherein said expansion bracket includes a plurality of notches located at positions along the length of said expansion bracket and each corresponding to one of a plurality of predetermined expansion positions for said expansion bracket, said brace guide including a detent assembly having a detent that is biased to engage said notches of said expansion bracket and to secure said expansion bracket in position when said expansion bracket is in one of the predetermined expansion positions.  
     
     
         79 . The expandable cabinet of  claim 44  wherein said expansion bracket includes a plurality of conical internal recesses located at positions along the length of said expansion bracket and each corresponding to one of a plurality of predetermined expansion positions for said expansion bracket, said brace guide including a lock pin having a conical section and pin threads, said threads allowing said lock pin to be rotated so that said conical section can engage one of said conical internal recesses of said expansion bracket and can secure said expansion bracket in position when said expansion bracket is in one of the predetermined expansion positions.  
     
     
         80 . The expandable cabinet of  claim 44  wherein said expansion bracket includes a gear rack positioned to engage a drive screw, said drive screw being connected to said rear corner post and configured to move said expansion bracket when said drive screw is rotated.  
     
     
         81 . The expandable cabinet of  claim 44  wherein said expansion bracket comprises a male telescoping segment, a female telescoping segment, and a detent groove, said male telescoping segment positioned to reciprocate within said female telescoping segment, said detent groove providing frictional resistance between said male and female telescoping segments to allow for precise positioning of said male telescoping segment.  
     
     
         82 . The expandable cabinet of  claim 44  wherein said expansion bracket comprises a male telescoping segment, a female telescoping segment and a detent groove, said male telescoping segment and said female telescoping segment each having a major dimension and an axis of reciprocation that extends approximately along said major dimension, said male telescoping segment positioned to reciprocate within said female telescoping segment, said detent groove providing frictional resistance between said male and female telescoping segments to allow for precise positioning of said male telescoping segment, said detent groove also preventing rotation of said male telescoping segment about said axis of reciprocation of said male telescoping segment with respect to said axis of reciprocation of said female telescoping segment.  
     
     
         83 . The expandable cabinet of  claim 44  wherein said brace guide comprises a threaded sleeve extending through said rear corner post, said expansion bracket being threaded along a portion of its length and configured to engage said threaded sleeve of said brace guide, said expansion bracket being configured to move against said threaded sleeve of said brace guide when the threaded portion of said expansion bracket is rotated.  
     
     
         84 . An expandable cabinet for storing and positioning electrical component boxes of different lengths, said expandable cabinet comprising: 
 a cabinet having a cabinet frame, said cabinet frame having a front portion, a back portion, a base and a pair of rear corner posts positioned at about said back portion of said cabinet frame, said rear corner posts extending from about said base, each of said rear corner posts having at least one brace guide;    an expansion bracket mounted on each said brace guide, each said expansion bracket having a protruding end extending in a rearward direction from a rear corner post, each of said expansion brackets capable of being secured at a plurality of positions relative to said rear corner post;    a door frame mounted to each said protruding end of each said expansion bracket wherein said door frame causes each of said expansion brackets to move in unison during expansion or contraction of said cabinet;    a door hinge mounted behind said back portion of said cabinet frame in a manner so as to move with at least one said expansion bracket;    a back door mounted on said door hinge in a position to extend across said back portion of said cabinet frame to form an expanded space of said expandable cabinet when said at least one expansion bracket is extended in a rearward direction from said rear corner post;    said back door having a top brace, a bottom brace, two side rails, and a door grille, each said side rail extending from said top brace to said bottom brace, one of said side rails of said door being pivotally mounted with said hinge on at least one of said expansion brackets, said door grille extending between said top brace and said bottom brace of said door, said door grille being sufficiently perforated to allow cooling air to pass through said back door;    a cover, said cover having a main section positioned at said top of said cabinet frame and a free member; a pair of channels extending into said main section of said cover, each of said channels opening at about said back portion of said cabinet frame; a pair of alignment legs, each of said alignment legs being positioned in a manner so as to move with said free member of said cover, each of said alignment legs extending into one of said channels of said main section of said cover, said alignment legs being configured to reciprocate within said channels;    a lower pair of expansion brackets slidably mounted on said brace guides at a location that is proximate said base of said cabinet frame; a top pair of expansion brackets slidably mounted on said brace guides at a location that is proximate said cover of said cabinet frame; a midpoint pair of expansion brackets slidably mounted on said brace guides at a location that is between said pair of lower expansion brackets and said pair of top expansion brackets, said midpoint expansion brackets having locking notches for locking said door frame at predetermined positions relative to said brace guide, thereby locating said lower expansion brackets, said midpoint expansion brackets, and said top expansion brackets in positions relative to said rear corner posts;    a plurality of locking notches positioned along said expansion brackets for locking said door frame at predetermined incremental positions relative to said brace guide; at least one lock pin mounted in at least one of said brace guides, said lock pin being positioned to engage said internal notches of at least one of said expansion brackets when said at least one of said expansion slides into one of said predetermined incremental positions;    a front door pivotally mounted to said front portion of said cabinet frame, said front door being sized to allow for the installation of an electrical component box through said front portion of said cabinet; and    at least one box mount installed in a horizontal position with respect to each of said rear corner posts, each said box mount comprising a T-bone bracket having a mounting rail for engaging an electrical component box and a box mount slot extending along a substantial portion of the length of said box mount, each said T-bone bracket being adjustable for positioning in a plurality of positions within said expandable cabinet, each said guide pin being configured to secure one of said T-bone brackets in a fixed position within said expansion cabinet.    
     
     
         85 . The expandable cabinet of  claim 84 , said cabinet having a support base and further comprising a stabilizer reciprocally connected to said cabinet, said stabilizer leg being extendable from said cabinet and having a length that is sufficiently long to expand the support base of the cabinet when said stabilizer leg is extended.  
     
     
         86 . The expandable cabinet of  claim 84 , said cabinet having a support base and further comprising: 
 a stabilizer having at least one stabilizer leg reciprocally connected to said cabinet, said stabilizer leg being extendable from said cabinet and having a length that is sufficiently long to expand the support base of the cabinet when said stabilizer leg is extended;    said front door being configured to engage and extend said stabilizer from the cabinet as said front door is opened from a closed position, said stabilizer expanding the support base of the cabinet when said stabilizer leg is extended;    said front door being configured to disengage said stabilizer when said stabilizer has been fully extended and said front door continues to be opened further; and    said front door being configured to again engage and retract said stabilizer when said front door is returned to a closed position from an open position.