VARIABLE SPRING COMPACTING SPRING OF VARIABLE CROSS-SECTION Russian patent published in 2019 - IPC G04B17/00 

Abstract RU 2707823 C2

FIELD: watches and other time measuring instruments.

SUBSTANCE: invention relates to compact variable-section spring. Balanced spring is solid and comprises solid strip wound on itself between inner coil and outer coil.

EFFECT: this strip has such geometrical characteristics that, when balance spring compression angle reaches 360°, the distance between each turn from the second turn to the penultimate turn is constant.

10 cl, 6 dwg

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RU 2 707 823 C2

Authors

Khelfer Zhan-Lyuk

Kozande Iv-Alen

Dates

2019-11-29Published

2016-10-21Filed