Patent US4305041A successfully refreshed from Google Patents.
US4305041A
Expired / Lapsed
US
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Time compensated clock oscillator
Assignee: Boeing North American Inc
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Filing: 1979-10-26
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Granted: 1981-12-08
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Expires: 1999-10-26
Abstract
Abstract A time compensated clock oscillator is disclosed that has a first low power oscillator that drives an output device such as a time-of-day clock, a second more precise oscillator whose output is compared to the output of the first oscillator, and develops a correction signal that is used to periodically correct the output device.
Inventors
- 👤 Marvin E. Frerking
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:31
CPC Classifications
G; G04; G04G; G04G3/00; G04G3/02; G04G3/027
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
83 words
A time compensated clock oscillator, comprising: means for generating a first and second frequency; means for comparing the first frequency with the second frequency including, means for mixing the first frequency with the second frequency to obtain a beat frequency, and means for combining the beat frequency with the second frequency; means for generating a correction signal that results from the comparison of the first frequency with the second frequency; and an output device controlled by the first frequency and the correction signal.
Claim 2
Dependent Claim
83 words
A time compensated clock oscillator, comprising: means for generating a first and second frequency; means for comparing the first frequency with the second frequency including, means for mixing the first frequency with the second frequency to obtain a beat frequency, and means for combining the beat frequency with the second frequency; means for generating a correction signal that results from the comparison of the first frequency with the second frequency; and an output device controlled by the first frequency and the correction signal.
Claim 3
Dependent Claim
39 words
The time compensated clock oscillator according to claim 1, further comprising: means for sensing the temperature of at least the means for generating the second frequency; and means for implementing a temperature correction to at least the second frequency.
Claim 4
Dependent Claim
23 words
The time compensated clock according to claims 1 or 2, further comprising: means for periodically enabling the means for generating the second frequency.
Claim 5
Dependent Claim
25 words
The time compensated clock according to claim 3, further comprising: means for periodically enabling the means for comparing the first frequency with the second frequency.
Claim 6
Dependent Claim
21 words
The time compensated clock according to claim 1, further comprising: means for periodically enabling the means for generating the correction signal.
Claim 7
Independent Claim
77 words
A method for time compensating a clock oscillator comprising: generating a first and second frequency; comparing the first frequency with the second frequency including the steps of mixing the first frequency with second frequency to obtain a beat frequency, and combining the beat frequency with the second frequency; generating a correction signal that results from the comparison of the first frequency with the second frequency; controlling an output device with the first frequency and the correction signal.
Claim 8
Independent Claim
77 words
A method for time compensating a clock oscillator comprising: generating a first and second frequency; comparing the first frequency with the second frequency including the steps of mixing the first frequency with second frequency to obtain a beat frequency, and combining the beat frequency with the second frequency; generating a correction signal that results from the comparison of the first frequency with the second frequency; controlling an output device with the first frequency and the correction signal.
Claim 9
Dependent Claim
33 words
The method according to claim 6 further comprising the steps of sensing the temperature during the step of generating a second frequency; and implementing the temperature correction to at least a second frequency.
Claim 10
Independent Claim
21 words
The method according to claims 6 or 7, comprising the step of; periodically enabling the means for generating the second frequency.
Claim 11
Dependent Claim
24 words
The method according to claim 8, further comprising the steps of periodically enabling the means for comparing the first frequency with the second frequency.
Claim 12
Dependent Claim
19 words
The method according to claim 8, further comprising the step of; enabling the means for generating a correction signal.
Claim 13
Dependent Claim
67 words
The time compensated clock oscillator according to claim 1 wherein the means for comparing the first frequency with the second frequency further comprises: a first normalizer means for normalizing the first frequency by dividing the first frequency by a first preselected number, N 1 ; and a second normalizer means for normalizing the second frequency by dividing the second frequency by second preselected number, N 2 .
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-07 | 1985-06-08 | 1985-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-07 | 1989-06-08 | 1989-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-07 | 1993-06-08 | 1993-12-08 | $7700.00 | Window Closed / Lapsed |