Accuracy correction in an electronic timepiece

Details Accuracy correction in an electronic timepiece Accuracy correction in an electronic timepiece

1978-03-21

1981-03-03

Weldon, Ulysses

Horology: time measuring systems or devices

Regulating means

For setting

368184, 368185, 368200, 368201, G04C 900

Patent

active

042544947

ABSTRACT:
A system for correcting the accuracy of a reference signal in an electronic timepiece comprises an electronic timepiece including a reference signal frequency correction means for increasing or decreasing the reference signal frequency in a digital fashion with the use of a low frequency signal, and a quartz tester arrangement for measuring the accuracy of the reference signal frequency. The quartz tester arrangement indicates the displacement of the reference signal frequency from the standard signal frequency with the use of five lamps, each of which is selected to be enabled in accordance with the detected value of the displacement. The reference signal frequency correction means in the electronic timepiece includes five manually operable switches corresponding to said five lamps and functions to increase or decrease the reference signal frequency in a digital fashion in response to the closing of the switches corresponding to the enabled lamps.

REFERENCES:
patent: 3351493 (1967-01-01), Ingle
patent: 3559170 (1971-01-01), Barnes
patent: 3800233 (1974-03-01), Santhier
patent: 3808407 (1974-04-01), Ratz
patent: 3811314 (1974-05-01), Anouchi
patent: 3852951 (1974-12-01), Santhier
patent: 3864957 (1975-02-01), Fujita
patent: 3892124 (1975-07-01), Reese
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patent: 3914931 (1975-10-01), Tsuruishi
patent: 3931703 (1976-01-01), Scherrer et al.
patent: 3937049 (1976-02-01), Murakami et al.
patent: 3946591 (1976-03-01), Yanagawa et al.
R. Ryan, "Basic Digital Electronics", 1975, pp. 178-183, Tab Books, Blue Ridge Summit, Pa. 17214.

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