Timepiece device

Details Timepiece device Timepiece device

2005-12-06

2005-12-06

Cuneo, Kamand (Department: 2841)

Horology: time measuring systems or devices

Power supply details

Electrical

C368S155000, C310S049030

Reexamination Certificate

active

06973010

ABSTRACT:
In a generator120in an electronic-controlled mechanical timepiece, the winding core133bof a coil134arranged nearer to the perimeter of a base plate2is made shorter than the winding core123bof a coil124arranged more inside. Accordingly, it is possible to make the area of an opening2ccan be made smaller in comparison with the prior art, and make the timepiece more small-sized by making smaller the outer diameter of the base plate2as keeping the distance D1between the corner part of the opening2cand the perimeter of the base plate2to the same degree as the prior art and thereby securing the strength of the base plate2.

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“SALTO: An Automatic Winding Mechanical Movement Having The Precision of a Quartz Movement” by Jean-Jacques Born, Rudolf Dinger, Pierre-Andre Farine (SHM Research and Development Laboratory, Asulab S.A.), published by Societe Suisse de chronometrie, Journee d'Etude in Oct. 1977, English translation.
ETA2836 from a cataloque of ETA S.A. (two pages), no date.

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