Horology: time measuring systems or devices – Plural timepiece system or system device – With wireless synchronization
Reexamination Certificate
2006-04-11
2006-04-11
Hirshfeld, Andrew H. (Department: 2854)
Horology: time measuring systems or devices
Plural timepiece system or system device
With wireless synchronization
C368S187000
Reexamination Certificate
active
07027363
ABSTRACT:
A time measurement system includes a master timepiece and a slave timepiece3. The master timepiece includes a time signal generating circuit that receives a standard frequency and time signal and generates a time signal being receivable by a motor driving coil35of the slave timepiece3; and a transmitter circuit and a coil that transmit this signal. The slave timepiece3includes a time counter33that keeps time on the basis of a reference signal; a driving motor with the driving coil35; a receiver circuit37that receives the time signal using the driving coil35; a control circuit38that corrects the time counter33on the basis of the received time signal; and a time display unit36that displays time. Since the driving coil35is used, increases in the number of components and cost are suppressed. The time can be adjusted within a short period of time. Waterproof abilities are improved.
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Hinze Leo T.
Hirshfeld Andrew H.
Seiko Epson Corporation
Watson Mark P.
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