Bore sight

Abstract

A laser bore sight ( 10 ) is disclosed hollow, outer housing ( 11 ) having an internally threaded, rear portion ( 14 ), and a threaded end cap ( 17 ) is sized and shaped to be threaded to the housing rear portion ( 14 ). The end cap ( 17 ) includes a threaded, tubular stem ( 18 ) having an annular rim ( 18 ′), an electrically insulative spacer ( 20 ) and a spring ( 21 ). The bore sight ( 10 ) also includes a laser diode ( 24 ), lens ( 25 ), a series of three batteries ( 26 ), an electrically conductive spring ( 27 ), and an electrical conductor. The end cap ( 17 ) is movable between an extended position with the spacer protruding from the end of the stem ( 18 ) and a retracted position with the spacer recessed within the stem so as to allow the battery to electrically contact the end cap.

1. A bore sight comprising:
 (a) a tubular housing having an electrically conductive portion;  
 (b) a laser mounted to one end of said housing in electrical contact with said housing conductive portion;  
 (c) at least one battery mounted in said housing electrically coupled with said laser, and  
 (d) an end cap movably mounted to the other end of said housing and in electrical contact with said housing electrically conductive portion for moment between an extended, switch-off position and a retracted, switch-on position, said end cap having an electrically conductive, tubular end positioned adjacent said battery, a spring mounted within said end cap tubular end, and an insulated spacer mounted within said end cap tubular end for reciprocal movement between a switched-off position protruding out of said end cap tubular end spacing said end cap eclectically conductive, tubular end from said battery and a switched-on position recessed within said end cap tubular end with said electrically conductive tubular end in engagement with said battery.  
 
     
     
       2. The bore sight of  claim 1  wherein said end cap may be moved to a detached position separated from said housing for access to said battery. 
     
     
       3. A bore sight comprising:
 (a) a partially conductive housing;  
 (b) a laser diode mounted within said housing;  
 (c) at least one battery mounted within said housing to energize said laser diode when an electrically conductive flow-path is completed with the laser diode, and  
 (d) an electrical circuit which electrically couples said battery with said laser diode, said electrical circuit including said partially conductive housing and an end cap, said end cap having an annular stem portion in electrical contact with said housing, a spring coupled to said annular stem and an insulative spacer coupled to said spring, said end cap being movable between an extended position wherein said spring and spacer bias said battery to a position separated from said annular stem portion and a retracted position wherein the biasing force of the spring is overcome and the battery contacts said stem portion to create a flow path through said stem portion and said housing.  
 
     
     
       4. The bore sight of  claim 3  wherein said end cap may be moved to a detached position separated from said housing for access to said battery. 
     
     
       5. The bore sight of aim  3  wherein said spacer is positioned between said spring and battery. 
     
     
       6. The bore sight of  claim 3  wherein said electrical circuit further comprises an electrically conductive spring coupled to and extending between said laser diode and said battery. 
     
     
       7. A bore sight comprising:
   a tubular housing having an electrically conductive portion;        a laser mounted to one end of said housing in electrical contact with said housing conductive portion;        at least one battery mounted in said housing electrically coupled with said laser, and        an end cap mounted to the other end of said housing, said end cap having first portion in electrical contact with said housing electrically conductive portion and an electrically insulative second portion mounted for movement relative to said first portion between a first position wherein said second portion prevents a complete electric circuit between said laser and said battery and a second position wherein said second portion allows a complete electric circuit between said laser and said battery.     
     
     
       8. The bore sight of  claim 7  wherein said first portion is a threaded stem. 
     
     
       9. The bore sight of  claim 7  wherein said second portion is an insulated spacer. 
     
     
       10. The bore sight of  claim 9  wherein said first portion is a threaded stem. 
     
     
       11. The bore sight of  claim 10  further comprising a spring biasing said spacer from said stem. 
     
     
       12. The bore sight of  claim 10  wherein said stem is threadably received within said tubular housing conductive portion. 
     
     
       13. The bore sight of  claim 12  wherein the threaded movement of said stem within said tubular housing causes the movement of said second portion between said first position and said second position. 
     
     
       14. A bore sight comprising:
   a partially conductive housing;        a laser diode mounted to said housing;        at least one battery mounted within said housing to energize said laser diode when an electrically conductive flow - path is completed with the laser diode, and        an electric circuit which electrically couples said battery with said laser diode, said electrical circuit including said partially conductive housing and an end cap, said end cap having an electrically conductive threaded stem, an electrically insulative spacer, and a spring biasing said spacer from said stem, said electrically insulative spacer being moveable relative to said electrically conductive threaded stem between a circuit completing position wherein a complete electrically conductive flow - path is established between the battery and the laser diode and a circuit incomplete position wherein an electrically conductive flow - path is not established between the battery and the laser diode.     
     
     
       15. The bore sight of  claim 14  wherein said stem is threadably received within said housing. 
     
     
       16. The bore sight of  claim 15  wherein the threaded movement of said stem within said housing causes the movement of said electrically conductive portion between said circuit completing position and said circuit incomplete position.