Horology: time measuring systems or devices – Chronological – With manually actuated display
Patent
1979-02-01
1980-12-02
Miska, Vit W.
Horology: time measuring systems or devices
Chronological
With manually actuated display
368 82, 368187, 368224, G04C 1700, G04C 1900, G04C 900
Patent
active
042375487
ABSTRACT:
Electronic timepiece having an electro-optic passive display cell comprising an oscillator used as a time base and an electronic control circuit of its several functions. The electronic circuit is operable by means of a stationary key or switch, having a capacitive action, carried by the glass or crystal of the timepiece. The stationary key is fed by the oscillator through a fixed or non-variable condenser. A conductive element is interposed between the stationary key and the display cell, the conductive element constituting one of the electrodes of the fixed condenser. The purpose of this arrangement is to eliminate the influence of a parasitic condenser constituted by the electrodes of the display cell and the electrode of the stationary key.
REFERENCES:
patent: 3983690 (1976-10-01), McClintock
patent: 4090353 (1978-05-01), Maeda et al.
Fellrath Jean
Grimm Maurice
Perotto Jean-Felix
Schneiter Ali
Ebauches S.A.
Miska Vit W.
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