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 85
CIPLES OF PATTERN MAKING. When the teeth are worked separately they areshaped with planes, either without any guide exceptthe profile lines marked with dividers or compasses oneach end, or within a box, Fig 60, the outlines ofwhich are the same as that of the teeth, and which isnotched out to the… … Fig. 60. Box for working Teeth in. around the periphery. Very much care is necessaryin such fitting, both to secure uniformity of pitch, andto assure the teeth being at exact right angles, oisquare across the face. Lines alone do not afford asufficiently accurate guide for this purpose, but…
Patternmaking
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