Canadian Jewellers Association · Toronto : Maclean-Hunter Pub. Co · leaf 1068
represent a plate to which the Holder is fastened;d, is the horizontal rod, with its head, e, and set screw, e ; /isthe vertical arbor, point upward. The holes are drilled entirelythrough the heads, c, and e, at right angles, one side of the cen-ter taking in the rods, which should be screwed in… … the set screw seen in front; / is a steel strip bent around thehub, h, to which it is fastened by the screw, k, and terminatingin fine points at the lower ends, which grasp the hair-spring ; iis a brass piece riveted in the back half, to give substance forholding the screw, /, which draws the…
Jewelry · Jewelry trade
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