The American watchmaker and jeweler; an encyclopedia for the horologist, jeweler, gold and silversmith .. . he scale. Fig. 10 illustrates theexpansion and contraction of bal-ances. With an increase of tempera-ture the rim is bent inward, thusreducing the size of the is owing to the fact that brassexpands more than steel, and inendeavoring to expand it bends therim inward. The action is, of course,reversed by lowering the tempera-ture below normal. Some adjustersspin a balance close to the flame of a ^/g. <,. lamp before using, in order to subject it to a higher temperature than
The American watchmaker and jeweler; an encyclopedia for the horologist, jeweler, gold and silversmith .. . he scale. Fig. 10 illustrates theexpansion and contraction of bal-ances. With an increase of tempera-ture the rim is bent inward, thusreducing the size of the is owing to the fact that brassexpands more than steel, and inendeavoring to expand it bends therim inward. The action is, of course,reversed by lowering the tempera-ture below normal. Some adjustersspin a balance close to the flame of a ^/g. <,. lamp before using, in order to subject it to a higher temperature than it islikely to meet in use. The balance is then placed upon a cold iron plateand afterward tested for poise. The balance is then trued, if found nee-essary, and the operation is repeated until it is found to be in poise afterheating. Britten says that it has been demonstrated that the loss inheat from the weakening of the hair-spring is uniformly in proportion tothe increase of temperature. The compensation balance, however, failsto meet the temperature error exactly, the rims expand a little too much.
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Keywords: ., bookcentury1800, bookdecade1890, bookidamericanwatc, bookyear1892
