Dingey, Peter Spear. [from old catalog] · New York, J. Wiley & sons · leaf 43
by cuttinga piece of wood to an angle, two sides of which run frompoint C and through A B; drive a wire nail at eachpoint of A and B in the piece on which the arc is to bestruck. It will be readily seen now, that, keeping thesides of angle against A B, and moving it right and left,the arc can be… … MfO Fly. 21. By ■ m P=4/ifcJi! f. Fig. 30. -J D F 1 iil: ■ Fig. Of\«« o KEY HEADS. PATTERN MAKJAG, 23 KEY HEADS FOR MOTION RODS. AN EASY WAY TO LESSEN THE COST OF THEIR PRODUCTION. The cost of getting out brass key heads for motionrods may be considerably reduced in the machine shopby the pattern…
Patternmaking
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