Canadian Jewellers Association · Toronto : Maclean-Hunter Pub. Co · leaf 747
op or bottom pivot is broken and the cylin-der is intact, it is necessary, according to a writer inWork, to drive out the old plug and fit a new one, us-ing the old cylinder. The top plug, being a long one, canusually be driven out equal to the length of the brokenpivot, and a new one turned on the… … Fig. 1—Cylinder Punch. Fig. 2—Cone Hollow-stake. Fig. 3—Temporary Cock. Fig. 4—Chariotand Shell. Fig. 5—Chuck gripping the Shell. The fir.st stage in fitting a cylinder plug is to removethe balance spring and collet. Assuming that the top pivotis broken, the cylinder is reversed; that is, the top…
Jewelry · Jewelry trade
Internet Archive · Thomas Fisher Rare Book Library · Public Domain Mark 1.0. Free to use for anything.
