American School of Correspondence · Chicago, American school of correspondence · leaf 214
d the pawl, 01-, out of the notch in the notched wheel,marked by the numeral, II. Fig. 128 shows the cams as having made about one-half ofa revolution. This movement has advanced the cam roll from Ato B and has caused the pawl to move fiom above notch II to IIIwhile the gradually decreasing…
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