Electroptical detector for determining the position of the time

Details Electroptical detector for determining the position of the time Electroptical detector for determining the position of the time

1985-10-18

1987-02-24

Roskoski, Bernard

Horology: time measuring systems or devices

Regulating means

For setting

368184, 368 46, 368327, 368 80, G04C 900

Patent

active

046453571

ABSTRACT:
A timepiece receives an externally transmitted radio signal corresponding to an accurate time of day. Disposed within the timepiece is a detecting mechanism for detecting the time of day being displayed by the timepiece. The signals are compared to determine the accuracy of the timepiece. The detection mechanism comprises an optoelectrical system which includes an emitter for directing a beam of radiation toward the sensor. The wheels of the gearworks intersect the beam ahead of the sensor to normally block the beam from the sensor. The wheels include orifices which, when aligned with the beam, permit the beam to reach the sensor, thereby providing an indication of the position of the wheels, and thus of the time being displayed.

REFERENCES:
patent: 4420263 (1983-12-01), Besson et al.
"Funkuhren (Radio Signal Timepieces)" edited by W. Hilberg (pp. 105-107).

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