Electronic timepiece with a depth gauge

Details Electronic timepiece with a depth gauge Electronic timepiece with a depth gauge

1985-11-27

1986-09-16

Roskoski, Bernard

Horology: time measuring systems or devices

Combined with disparate device

368204, G04B 3700

Patent

active

046119230

ABSTRACT:
In an electronic timepiece with a depth gauge, having a power supply battery, a timepiece circuit, a display unit, a water pressure sensor, a depth gauge circuit for receiving a sensor signal from the water pressure sensor and generating a water depth information signal, a mode control circuit for switching a timepiece mode and a depth gauge mode, and a display switching circuit for selectively displaying the time information signal from the timepiece circuit or the water depth information signal from the depth gauge circuit in response to a control signal from the mode control circuit, there are provided a battery voltage detector for detecting a voltage drop of the battery, and a waste time detector for detecting a nondive state represented by the depth gauge detector. The mode control circuit is forcibly set in the timepiece mode in response to a detection signal from the battery voltage detector or the waste time detector.

REFERENCES:
patent: 3992949 (1976-11-01), Edmondson
patent: 4109140 (1978-08-01), Etra
patent: 4188825 (1980-02-01), Farrar
patent: 4352168 (1982-09-01), Anderson
patent: 4533256 (1985-08-01), Ostendorf

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