Horology: time measuring systems or devices – Regulating means – For adjusting the frequency or beat
Patent
1987-04-06
1988-04-12
Roskoski, Bernard
Horology: time measuring systems or devices
Regulating means
For adjusting the frequency or beat
368200, G04B 1712
Patent
active
047379448
ABSTRACT:
In a temperature gradient adjustor for a temperature-compensated electronic watch, the temperature gradient adjusting range can be widened without any drop in the temperature gradient adjusting resolution of a temperature sensitive oscillator by adding a roughly temperature gradient adjusting variable frequency divider for variably dividing the frequency of the output of a temperature sensitive oscillator and by operating the temperature gradient adjustor at a value which is prepared by adding a constant numerical value to temperature gradient adjusting numerical information.
A constant voltage supplying to a temperature sensitive oscillator can be finely adjusted from external side so as to optimize a linearity of frequency versus temperature characteristic.
REFERENCES:
patent: 4373821 (1983-02-01), Morishile
patent: 4453834 (1984-06-01), Suzuki et al.
patent: 4456386 (1984-06-01), Dellea
patent: 4461582 (1984-07-01), Walther
Inoue Yuichi
Kasuga Masao
Masaki Hiroyuki
Odagiri Hiroshi
Ohtawa Shuji
Adams Bruce L.
Roskoski Bernard
Seiko Instruments Inc.
Wilks Van C.
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