Height comparator

Abstract

A device is provided for measuring the centre of a grinding wheel for use in setting the height of a skate blade. The device has a base, a support extending from the base, a slider block slidable along the neck between the base and a head block secured to an upper end of the neck, a dial indicator supported by the head block for measuring the position of the slider block along the neck, a lower roller, and an upper roller. The lower roller and upper roller are rotatably attached to the slider block and radially aligned with each other such that a portion of each roller protrudes from the slider block, wherein a clockwise tangential force imparted on the upper roller causes the slider block to slide along the neck, and the dial indicator to record the movement of the slider block, which enables the height of an object to be set on the dial indicator with respect to a rest position of the slider block.

1 . A device for measuring the height of one object for use in setting the height of another object, said device comprising a base, a support extending from said base, a measuring head displaceable relative to said support within a defined range, an indicator for measuring the position of said measuring head relative to said support, and a centering guide engageable with said one object and said another object, wherein said centering guide moves said measuring head relative to said support while locating the height of said one object, and said indicator is operable to capture the height of said one object for use in setting the height of said another object.  
   
   
       2 . A device according to  claim 1  wherein said base includes a locking mechanism for securing said base to a surface.  
   
   
       3 . A device according to  claim 1  wherein said locking mechanism is a magnetic switch which may be activated to generate a magnetic attraction between said base and said surface.  
   
   
       4 . A device according to  claim 1  wherein said measuring head is slidable relative to said support.  
   
   
       5 . A device according to  claim 4  further comprising a stop collar engageable with said support for setting a lower limit of travel for said measuring head along said support.  
   
   
       6 . A device according to  claim 5  wherein said stop collar engages said support using a setscrew.  
   
   
       7 . A device according to  claim 1  wherein said indicator comprises a dial and a needle for indicating said height.  
   
   
       8 . A device according to  claim 7  wherein said dial includes a rotatable face, said rotatable face comprising at least one marking for indicating said height, said at least one marking including a zero marking for aligning with said needle to capture said height.  
   
   
       9 . A device according to  claim 8  further comprising a dial lock for securing said rotatable face subsequent to capturing said height.  
   
   
       10 . A device according to  claim 1  wherein said centering guide includes a pair of convergent faces to centre said measuring head relative to said one object.  
   
   
       11 . A device according to  claim 10  wherein said faces comprise curved surfaces.  
   
   
       12 . A device according to  claim 11  wherein said curved surfaces are provided by a pair of rollers being rotatable about respective axes.  
   
   
       13 . A device according to  claim 12  wherein said rollers are supported by said measuring head and include a channel therebetween to permit passage of a portion of one of said one object and said another object during measurement.  
   
   
       14 . A device according to  claim 1  wherein said one object is a grinding wheel and said another object is a skate blade.