Armstrong, Nikaido, Marmelstein & Kubovcik
Drill grinder
 This invention relates to an improved drill grinder and particularly to one which comprises a main frame. A grinding wheel is disposed on one end of the main frame. A stand is located on the slidable seats which are disposed on the other end of the main frame. The stand is provided with a handle which is used to drive a block in a predetermined manner. A sliding seat having a supporting plate is slidably secured to the block. A clamp having a drill bit clamped therein is disposed on the supporting plate of the sliding seat. In operation, the relative position between the drill bit and the grinding wheel is predetermined by means of adjusting a positioning seat and the sliding seat thereby easily and accurately obtaining the desired clearance angle and point angle of the drill bit. 
B
B24B
inventional
Jing-Rong
Chen