The principles of pattern making, written specially for apprentices and students in technical schools (1900)
Horner, Joseph Gregory, 1847-1927 · London, New York, Pitman · leaf 101
ample of a spur wheel block. Theteeth, however, are worked alike on the outer and inner 86 PRINCIPLES OF PATTERN MAKING. tooth faces, because their bevel prevents any contactwith the sand occurring before they are actually inplace. The block is marked out by taking lines off thewheel drawing, in… … a— *L • d -
Patternmaking
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