Electronic time-piece with barometric indicator

Details Electronic time-piece with barometric indicator Electronic time-piece with barometric indicator

1979-04-23

1981-03-17

Truhe, J. V.

Horology: time measuring systems or devices

Combined with disparate device

Ambient condition detector

73754, 368 10, G04B 4700, G04B 4706

Patent

active

042571120

ABSTRACT:
The invention concerns an electronic time-piece having a barometric indicator, indicating, for example, barometric trends.
The time-piece comprises, in addition to the reference oscillator for determining the time, a measurement oscillator associated with a transducer exposed to the ambient air. A counter measures the variations of the frequency of the measurement oscillator due to the fluctuations of atmospheric pressure, and an electronic circuit controls, from predetermined detection thresholds, the indication of barometric trend on the display device of the time-piece.

REFERENCES:
patent: 3124004 (1964-03-01), Zenger
patent: 3355949 (1967-12-01), Elwood et al.
patent: 3839626 (1974-10-01), Klem et al.
patent: 3924464 (1975-12-01), Cummins
patent: 4101838 (1978-07-01), Aihara et al.

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