Society of Glass Technology · [Sheffield] · leaf 733
d by a spindle, 63, which also carries a wheeldriving the Avheel, 24. The pattern, 25, contacts with a rest, 26, 22-2 332 JOURNAL OF THE SOCIETY OF GLASS TECHNOLOGY. and, in order to feed the lens gradually down on to the grinding-wheel, the rest is mounted on the end of a lever, 64, pivoted at,… … Fig. 220. fed one tooth at each revolution of the shaft, 59, by a pawl, 71,carried by an eccentric pin, 70, on the shaft. The highest partof the cam initially contacts with the lever, and rotation of thecam gradually lowers the rest until the lowest part of the camcontacts with the lever; grinding…
Glass
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