Improvements in or relating to the Selection of Springs for Balance-wheels of Watches and Clocks.

摘要

2258. Cornioley, G. E. Jan. 30. Tools for use in selecting the hair-springs to go with a particular balance. To avoid distortion of the collet or of the hair-spring by removal from the balance arbor if unsuitable, an adapter, as shown, is provided, which takes the collet on its conical half and clips upon the arbor.