Jeweled Bearings for Watches: A Full and Complete Description of the Manufacture, Gauging and Setting of Jeweled Bearings in Timekeeping Instruments (Classic Reprint)
Excerpt from Jeweled Bearings for Watches: A Full and Complete Description of the Manufacture, Gauging and Setting of Jeweled Bearings in Timekeeping Instruments The ruby besides being used for balance holes and end stones as above described, is well adapted for upper and lower plate holes, the high color - to make a distinction being placed above the center, third, fourth, escape and pal let arbor, except in cases where some of these may be capped. Or, as in the case with balance jewels, they may, in the lighter color, be ...
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Excerpt from Jeweled Bearings for Watches: A Full and Complete Description of the Manufacture, Gauging and Setting of Jeweled Bearings in Timekeeping Instruments The ruby besides being used for balance holes and end stones as above described, is well adapted for upper and lower plate holes, the high color - to make a distinction being placed above the center, third, fourth, escape and pal let arbor, except in cases where some of these may be capped. Or, as in the case with balance jewels, they may, in the lighter color, be of the sapphire family. Jewel pins are frequently made Of ruby for higher grade watches, although ruby is not quite as hard. They are frequently used in high grade watches for pallet stones on account Of their beauty of color. The high-colored ruby is falling into disuse of late, for the reason that they are too soft to be satisfactory. The garnet is of good color but very soft as 'compared with ruby or sapphire. 'it is used principally for plate holes in third, fourth, escape and pallets, but although it is less expensive, both in the rough and to manufacture, it is grow Ing less popular every day, at least among American watch manufacturers; and is now principally confined to cheap watches. Garnets are much more friable than sapphires Or rubies and for this reason entail a larger percentage Of waste during the processes of manufacture, particularly in that of setting. Setting in recent years is done largely by automatic machines which not being endowed with that human quality called judgment, press just as hard on a thin jewel as a thick one. Garnets are, however, peculiarly adap ted for use as pallet stones in connection with brass wheels, and in this connection are used almost exclusively. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at ... This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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