Dingey, Peter Spear. [from old catalog] · New York, J. Wiley & sons · leaf 31
Fig. 11, 1^ … Fi(/. 12, a m ::^ a SI73 II DIFFERENTIAL CHAIN WHEELS. PATTERN MAKING, 15 DIFFERENTIAL CHAIN PULLEYS. When the groove in a chain wheel or pulley is madeto fit the links of a chain it is sure to be an expensivepattern, especially when made double, like those used inWestons Differential Pulley…
Patternmaking
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
