Patent US5105153A successfully refreshed from Google Patents.
US4128808A
Expired / Lapsed
US
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Channel frequency analyser
Assignee: Sencore Inc
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Filing: 1976-11-04
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Granted: 1978-12-05
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Expires: 1996-11-04
Abstract
Abstract The percentage deviation of citizen band transmitter channel frequencies from the standard channel frequencies is determined by counting the difference between the number of cycles in the transmitted and standard frequencies during a period of 0.37 second, the number counted being mathematically related to the percentage deviation by the same factor for all channel frequencies.
Inventors
- 👤 Marlin D. Westra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:17
CPC Classifications
G; G01; G01R; G01R23/00; G01R23/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
99 words
A method of measuring the percentage deviations of any one of a plurality of first frequencies from a plurality of respective reference frequencies, comprising the steps of counting during a period of predetermined duration the difference between the number of cycles of one of said first frequencies and the number of cycles of the corresponding one of said reference frequencies, the duration of said period being selected such that said difference is mathematically related to each of said percentage deviations by substantially the same factor for all of said first frequencies and the corresponding ones of said reference frequencies.
Claim 2
Independent Claim
99 words
A method of measuring the percentage deviations of any one of a plurality of first frequencies from a plurality of respective reference frequencies, comprising the steps of counting during a period of predetermined duration the difference between the number of cycles of one of said first frequencies and the number of cycles of the corresponding one of said reference frequencies, the duration of said period being selected such that said difference is mathematically related to each of said percentage deviations by substantially the same factor for all of said first frequencies and the corresponding ones of said reference frequencies.
Claim 3
Dependent Claim
22 words
A method according to claim 1 wherein said period is inversely proportional to a frequency within the range of said first frequencies.
Claim 4
Dependent Claim
16 words
A method according to claim 2 wherein said range is between 26.965 MHZ and 27.255 MHZ.
Claim 5
Dependent Claim
83 words
Apparatus for measuring percentage deviations of a plurality of first frequencies from a plurality of respective reference frequencies, comprising a source of said reference frequencies, means for providing a train of pulses at the differential frequency between each of said first frequencies and said associated reference frequencies, and means for counting said pulses throughout a period having a duration such that the number of pulses counted is related to said percentage deviation by substantially the same factor for all of said first frequencies.
Claim 6
Dependent Claim
83 words
Apparatus for measuring percentage deviations of a plurality of first frequencies from a plurality of respective reference frequencies, comprising a source of said reference frequencies, means for providing a train of pulses at the differential frequency between each of said first frequencies and said associated reference frequencies, and means for counting said pulses throughout a period having a duration such that the number of pulses counted is related to said percentage deviation by substantially the same factor for all of said first frequencies.
Claim 7
Dependent Claim
22 words
Apparatus according to claim 4 comprising display means for providing a visual display of the number of pulses counted during said period.
Claim 8
Dependent Claim
25 words
Apparatus according to claim 4 for use in monitoring a citizen band transmitter, comprising means for setting said period to be equal to 0.37 seconds.
Claim 9
Dependent Claim
27 words
Apparatus according to claim 6 wherein said means for providing a train of pulses comprises a mixer and a filter connected to the output of said mixer.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |