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US4092820A Expired / Lapsed US ⏱️ 0.0 years remaining

Electronic timepiece

Assignee: Citizen Watch Co Ltd
•
Filing: 1976-02-26
•
Granted: 1978-06-06
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Expires: 1996-02-26
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Abstract

Abstract An electronic timepiece in which a higher frequency signal from a frequency standard is divided down to a lower frequency drive signal by a frequency converter. The drive signal is applied through a driver circuit to an electro-mechanical transducer which actuates time-representing members to indicate time. A control means is coupled to intermediate stages of the frequency converter and produces higher frequency drive signals. At least one contact plate made of flexible, electrically conductive material is adapted to be depressed from outside the watch case through a recess formed therein whereby the control means is connected to the driver circuit to apply the higher frequency drive signals to the electro-mechanical transducer thereby rapidly advancing the time-representing members.

Inventors

  • 👤 Kazunari Kume
  • 👤 Minoru Watanabe
  • 👤 Hideshi Oono
  • 👤 Munetaka Tamaru

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 00:28
CPC Classifications
G; G04; G04C; G04C13/00; G04C13/08; G04C13/10; G04C13/11; G04C3/00; G04C3/001; G04C3/005; G04C3/14; G04G; G04G5/00; G04G5/02

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 256 words
An electronic timepiece comprising, in combination: a frequency standard providing a relatively high frequency signal; a frequency converter dividing down the relatively high frequency signal; to provide a first low frequency signal, a second low frequency signal lower in frequency than said first low frequency signal, and a third low frequency signal lower in frequency than said second low frequency signal; first and second manually operable switches; a control circuit including means for generating first and second outputs when said first and second manually operable switches are actuated, respectively, means for generating a first output signal in reponse to at least said first output and said first low frequency signal, and means for generating a second output signal in response to at least said second output and said second low frequency signal; a driver circuit normally providing first driving current pulses in response to said third low frequency signal and responsive to said first and second output signals from said control circuit to provide second and third driving current pulses, respectively, at frequencies equal to those of said first and second low frequency signals; and an electro-mechanical transducer normally driven by said first driving current pulses to advance rotatable time-representing members stepwise once per every one unit time and responsive to said second and third driving current pulses to advance said time-representing members at first and second speeds higher than a normal rotational speed in which said electromechanical transducer is driven by said first driving current pulses, whereby time correction can be performed at different speeds.
Claim 2
Dependent Claim 256 words
An electronic timepiece comprising, in combination: a frequency standard providing a relatively high frequency signal; a frequency converter dividing down the relatively high frequency signal; to provide a first low frequency signal, a second low frequency signal lower in frequency than said first low frequency signal, and a third low frequency signal lower in frequency than said second low frequency signal; first and second manually operable switches; a control circuit including means for generating first and second outputs when said first and second manually operable switches are actuated, respectively, means for generating a first output signal in reponse to at least said first output and said first low frequency signal, and means for generating a second output signal in response to at least said second output and said second low frequency signal; a driver circuit normally providing first driving current pulses in response to said third low frequency signal and responsive to said first and second output signals from said control circuit to provide second and third driving current pulses, respectively, at frequencies equal to those of said first and second low frequency signals; and an electro-mechanical transducer normally driven by said first driving current pulses to advance rotatable time-representing members stepwise once per every one unit time and responsive to said second and third driving current pulses to advance said time-representing members at first and second speeds higher than a normal rotational speed in which said electromechanical transducer is driven by said first driving current pulses, whereby time correction can be performed at different speeds.
Claim 3
Dependent Claim 39 words
An electronic timepiece according to claim 1, in which said time-representing members comprise a minutes hand connected through a center wheel to said electro-mechanical transducer, and an hours hand connected through hours and minutes wheels to said center wheel.
Claim 4
Dependent Claim 74 words
An electronic timepiece according to claim 1, in which said frequency standard, frequency converter, control circuit and driver circuit are incorporated on an integrated circuit chip, and further comprising a watch case, a support frame fixedly mounted in said watch case, and a base plate supported by said support frame in said watch case and carrying thereon said integrated circuit chip, said watch case including a front plate and a back cover secured thereto.
Claim 5
Dependent Claim 87 words
An electronic timepiece according to claim 3, in which at least one of said manually operable switches comprises a flexible contact plate disposed between said front plate and said base plate and held in pressured contact at its periphery with a bottom wall of said front plate, and stationary contacts mounted on an upper surface of said base plate and connected to said control circuit, and in which said front plate of said watch case has a switching window through which said flexible contact plate is deflected.
Claim 6
Dependent Claim 19 words
An electronic timepice according to claim 4, in which said flexible contact plate is made of electrically conductive rubber.
Claim 7
Dependent Claim 19 words
An electronic timepiece according to claim 4, in which said flexible contact plate is made of electrically conductive resin.
Claim 8
Dependent Claim 21 words
An electronic timepiece according to claim 4, further comprising sealing means disposed between said flexible contact plate and said front plate.
Claim 9
Dependent Claim 25 words
An electronic timepiece according to claim 3, in which the rotational axis of said time-representing members is displaced from the center of said watch case.
Claim 10
Dependent Claim 29 words
An electronic timepiece according to claim 3, in which said electro-mechanical transducer has a rotational shaft extending parallel with respect to a dial and connected to said time-representing members.

References Cited (Backward Citations)

US2800799A Cited
US3857235A Cited
US3584162A Cited
US3792577A Cited
US3889460A Cited
US3852951A Cited
US3784725A Cited
US3955352A Cited
US3914932A Cited
US3973099A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1981-06-05 1981-12-05 1982-06-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1985-06-05 1985-12-05 1986-06-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1989-06-05 1989-12-05 1990-06-06 $7700.00 Window Closed / Lapsed

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