Image: Alarm Clock Balance Wheel
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Description: Balance wheel in a cheap 1950s mechanical alarm clock, the Apollo, by Lux Mfg. Co. 2.4 cm diameter. Arrows point to the hairspring (1) and the regulator (2). It has a rate of 4 beats (ticks) or two cycles per second. The clock belongs to me and is still working.
Title: Alarm Clock Balance Wheel
Credit: Own work
Author: Chris Burks Chetvorno
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
Image usage
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