This section is from the book "Amateur Work Magazine Vol6". Also available from Amazon: Amateur Work.
George A. Seaton
In many shops there are numerous chisels, cutters and plane bits that must be ground from time to time and if they all must be held by hand the process not only requires much skill but becomes very tedious long before it is completed. If a clamp is installed like the one here described the work is hastened, the results are better, and the job now can be entrusted to a boy.
First a board must be fashioned similar to A, two inches thick, six inches wide and long enough to come slightly higher than the top of the stone when attached as shown in engraving. The lower end of this must be beveled so that it rests flat on the floor when in position. The board is held in position by a hook forged of a light rod of iron with the ends passing down through the holes in the trough that originally were intended for attaching the name-plate. In this board, A, must be bored a number of holes in such a direction that they are about parallel to the floor. These afford a number of resting places for the clamp proper, C D.
The clamp is made up of two pieces of inch stock as wide as the widest plane bit and with one end of C rounded to fit the holes in A. Upon strip C is fastened a little rib, F, which serves as a fulcrum for the piece D. At the end of D is fastened by staples an iron rectangle E made of welded strap iron which holds the chisel or plane bit against the lower side of C when the hand is passed down upon the other end of D.
By moving the chisel forward or backward in the clamp or by raising or lowering the rear end of C, any angle desired may be secured upon the chisel as it is pushed back and forth across the stone. By the use of this clamp the speed of grinding can be much increased as all the weight may be thrown upon the chisel edge and no thought need be given to the angle. The device illustrated is in use upon a Keystone grindstone but could easily be modified for any other stone.- "Wood Craft."