US5016231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for electronically correcting an electronic timepiece
Assignee: Seiko Epson Corp
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Filing: 1989-04-19
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Granted: 1991-05-14
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Expires: 2009-04-19
Abstract
Abstract An electronically correcting electronic timepiece is provided having indicating hands for indicating the time of day or the passage of time. At least one step motor is provided for driving the indicator. A correction signal forming circuit produces drive pulses for driving the step motor to correct the indicator. A control circuit controls the correction signal forming circuit to accelerate and decelerate the indicator in a step manner during correction of the indicator.
Inventors
- 👤 Takashi Kawaguchi
- 👤 Hiroshi Yabe
- 👤 Akihiko Maruyama
- 👤 Hiroyuki Kubo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:51
CPC Classifications
G; G04; G04C; G04C3/00; G04C3/14; G04C9/00; G04G; G04G5/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
162 words
A method for setting an indicator on an electronically correcting electronic timepiece having an indicator for indicating the time, a step motor for driving the indicator, correction signal forming circuit for producing a drive pulse for driving the step motor to correct said indicator, control means for producing a control interrupt and for controlling said correction signal forming circuit to change the speed of the indicator in steps during correction of the indicator, including the steps: switching the timepiece to an indicator setting mode; inputting a reference clock value to the control means; controlling the correction signal forming circuit in response to the reference clock value; inputting a forward drive command to the correction signal forming circuit; inputting a data value to the control means; driving the indicator at a continuous speed for a period corresponding to the input data value; producing a control interrupt; and increasing the reference clock value if the reference clock value is less than a predetermined value.
Claim 2
Independent Claim
162 words
A method for setting an indicator on an electronically correcting electronic timepiece having an indicator for indicating the time, a step motor for driving the indicator, correction signal forming circuit for producing a drive pulse for driving the step motor to correct said indicator, control means for producing a control interrupt and for controlling said correction signal forming circuit to change the speed of the indicator in steps during correction of the indicator, including the steps: switching the timepiece to an indicator setting mode; inputting a reference clock value to the control means; controlling the correction signal forming circuit in response to the reference clock value; inputting a forward drive command to the correction signal forming circuit; inputting a data value to the control means; driving the indicator at a continuous speed for a period corresponding to the input data value; producing a control interrupt; and increasing the reference clock value if the reference clock value is less than a predetermined value.
Claim 3
Dependent Claim
93 words
The method of claim 1, wherein said step motor drives the indicator in response to a drive pulse and further including the step of increasing the drive pulse frequency for driving the indicator in steps during correction of the indicator by selecting the drive pulse from at least one of a first drive pulse having a first frequency, a second drive pulse having a second frequency greater than the value of the first frequency and a third pulse having a third frequency greater than the first frequency and less than the second frequency.
Claim 4
Dependent Claim
14 words
The method of claim 2, wherein the second frequency is double the first frequency.
Claim 5
Dependent Claim
16 words
The method of claim 2, wherein said second frequency is more than twice said first frequency.
Claim 6
Dependent Claim
13 words
The method of claim 1, wherein said indicator indicates a set alarm time.
References Cited (Backward Citations)
US4382686A
Cited
US4275463A
Cited
US4357693A
Cited
US4445785A
Cited
US4623261A
Cited
US4652140A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-13 | 1994-11-12 | 1995-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-13 | 1998-11-12 | 1999-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-13 | 2002-11-12 | 2003-05-14 | $7700.00 | Window Closed / Lapsed |