WVhen the brass arms are attached to the steel arms the angle between the brass and steel arms is about thirty degrees more or less and can be varied to change the leverage as occasion may require, as represented in Figs. The brass arms are about the thickness of the rim, and the hub at the center is halved down to receive the larger part of the steel hub the outer end of the brass arms are also halved down on the opposite side with a pin, 6, set in the thin part, as clearly shownin Fig. We then take brass or some metal that when exposed to heat will expand more than the arms, I), b, and construct the arms-cl, (Z, in one piece, with a hub in the center, the eye of which is sufliciently large to receive the projecting part of the steel hub, c, and is fitted to swing thereon. 5, that part of the hub which projects above the arm is made a little smaller in diameter than the main part. The under side of the steel arms, 5, b, are even with the under side of the rim and made about half the thickness of the rim with a hub, c, at the center projecting to the plane of the upper side of the rim as represented in Fig. We take a piece of steel or any suitable metal and construct a balance wheel with a solid rim, a, and two arms, I), Z), Figs. G04B17/222- Compensation of mechanisms for stabilising frequency for the effect of variations of temperature with balances.G04B17/22- Compensation of mechanisms for stabilising frequency for the effect of variations of temperature.G04B17/20- Compensation of mechanisms for stabilising frequency.G04B17/00- Mechanisms for stabilising frequency.G04B- MECHANICALLY-DRIVEN CLOCKS OR WATCHES MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS.235000014676 Phragmites communis Nutrition 0.000 description 2.Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number Filing date Publication date Application filed filed Critical Application granted granted Critical Publication of US12129A publication Critical patent/US12129A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links
#Brass timekeeper batch 2 numbers pdf#
US12129A - Compensation-balance for timekeepers - Google Patents US12129A - Compensation-balance for timekeepers - Google Patents Compensation-balance for timekeepers Download PDF Info Publication number US12129A US12129A US12129DA US12129A US 12129 A US12129 A US 12129A US 12129D A US12129D A US 12129DA US 12129 A US12129 A US 12129A Authority US United States Prior art keywords balance arms brass rim lever Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
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