Pattern making; a practical treatise for the pattern maker on wood-working and wood turning, tools and equipment, construction of simple and complicated patterns, modern molding machines and molding practice (1921)
Ritchey, James, Monroe, Walter W. (Walter William), b. 1869 · Chicago, American technical society · leaf 162
ugh the back end of the zinc to allow of exactadjustment to the diameter of the wheel. ^^ This wooden bar is hungcentrally on a peg or dowel which must be placed exactly in thecenter of the hub. For this purpose it is customary to use a blockof wood as a temporary hub, the center of which may be… … Fig. 259. Template Used to Lay Out Teeth of Spur Gear the bar on which the template revolves. This notch is shown inFig. 259. To use the template, place it over the center pin and bring thenotch exactly in line with one of the spacing lines on the outsideof a block, and with a very sharp pointed…
Patternmaking
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