Patent
1974-02-06
1976-02-17
Hix, L. T.
58 23A, G04C 300
Patent
active
039383164
ABSTRACT:
A temperature compensated electronic timepiece comprises a time reference signal generator for generating a time reference signal and a temperature compensating device for compensating a change of the oscillating frequency of the time reference signal generator caused by any external temperature change. The temperature compensating device comprises a temperature detector having an element composed of two semiconductors of different respective conductivities (such as a transistor composed of P and N type semiconductors) which are joined to form a junction, or an element composed of a conductor and a semiconductor joined to form a junction. The voltage-current characteristics of the junction are changed when the external temperature exceeds a given temperature to deliver a digital signal whose state is reversed from an initial condition. The output signal from the temperature detector compensates any temperature change of the oscillating frequency of the time reference signal generator.
REFERENCES:
patent: 2811647 (1957-10-01), Nilssen
patent: 3388344 (1968-06-01), West
patent: 3526853 (1970-09-01), Vittoz
patent: 3531739 (1970-09-01), Groves
patent: 3690546 (1972-09-01), Uehara
patent: 3713033 (1973-01-01), Frerking
patent: 3719838 (1973-03-01), Peduto et al.
patent: 3800523 (1974-04-01), Yamazaki
Hashimoto Yukio
Morokawa Shigeru
Nishikubo Yasuhiko
Citizen Watch Co. Ltd.
Dubno Herbert
Hix L. T,.
Montague Ernest G.
Ross Karl F.
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