American School of Correspondence · Chicago, American school of correspondence · leaf 214
Fig. 129. Fig. 130. Diagrams of Detaching Roll Cams. In Fig. 129, the cams are shown as having completed aboutthree-quarters of a revolution. The cam roll, T^, is on the snirdlestdiameter of the groove at C. The pawl, which is shown just en-tering notch III in Fig. 128, has engaged the whole depth…
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