US3758853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for determining a tuned frequency
Assignee: Heath Co
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Filing: 1972-03-20
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Granted: 1973-09-11
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Expires: 1992-03-20
Abstract
Abstract A method and apparatus for determining a tuned frequency of a radio by subtracting numerical counts of the frequencies of two oscillators from a numerical count of a high frequency oscillator (HFO). The several counts can also be added where the HFO has a frequency less than the tuned frequency.
Inventors
- 👤 W Dionne
- 👤 Brude Ph Blanc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:09
CPC Classifications
H; H03; H03J; H03J1/00; H03J1/02; H03J1/04; H03J1/045; H03J1/047; H03J1/048
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
63 words
A method for determining the tuned frequency of a multiconversion radio comprising, in combination, obtaining a numerical count indicative of the frequency of oscillation of a first local oscillator of the radio; obtaining a numerical count indicative of the frequency of oscillation of a second local oscillator of the radio; combining said counts in a predetermined algebraic sense; and displaying the resulting number.
Claim 2
Independent Claim
63 words
A method for determining the tuned frequency of a multiconversion radio comprising, in combination, obtaining a numerical count indicative of the frequency of oscillation of a first local oscillator of the radio; obtaining a numerical count indicative of the frequency of oscillation of a second local oscillator of the radio; combining said counts in a predetermined algebraic sense; and displaying the resulting number.
Claim 3
Dependent Claim
54 words
A method according to claim 1 wherein the method further includes the step of obtaining a numerical count indicative of the frequency of oscillation of a third local oscillator of the radio; and combining the count from the third oscillator with the counts from the first and second oscillators in a predetermined algebraic sense.
Claim 4
Dependent Claim
37 words
A method according to claim 2 wherein the step of combining the counts in a predetermined algebraic sense includes subtracting the numerical counts from the second and third oscillators from the numerical count of the first oscillator.
Claim 5
Dependent Claim
29 words
A method according to claim 2 wherein the step of combining the counts in a predetermined algebraic sense includes adding the counts from the first, second and third oscillators.
Claim 6
Dependent Claim
123 words
A method according to claim 1 wherein said step of obtaining a numerical count indicative of the frequency of oscillation of a first local oscillator includes obtaining the count during a first time interval of a time period, said step of obtaining a numerical count indicative of the freqUency of oscillation of the second local oscillator includes obtaining a numerical count during a second time interval of said time period, said second time interval immediately following said first time interval; and said step of obtaining a numerical count indicative of the frequency of oscillation of the third local oscillator includes obtaining a numerical count during a third time interval of said time period, said third time interval immediately following said second time interval.
Claim 7
Dependent Claim
15 words
A method according to claim 5 wherein said time intervals are of equal time duration.
Claim 8
Dependent Claim
60 words
A method according to claim 6 wherein said steps of obtaining a numerical count indicative of the frequencies of the first, second, and third oscillators includes, obtaining said numerical counts several times a second; and said step of displaying the number indicative of the result includes displaying the result of an immediately preceding counting operation while performing a counting operation.
Claim 9
Independent Claim
120 words
A method for determining the tuned frequency of a multiconversion radio having local oscillators including a high frequency oscillator, a second frequency oscillator, and a beat frequency oscillator comprising, in combination, obtaining a numerical count indicative of the frequency of oscillation of the high frequency oscillator during a first time interval, obtaining a numerical count indicative of the frequency of oscillation of the second frequency oscillator during a second time interval; obtaining a numerical count indicative of the frequency of oscillation of the beat frequency oscillator during a third time interval; subtracting the counts of the second frequency oscillator and the beat frequency oscillator from the count of the high frequency oscillator; and displaying a number indicative of the result.
Claim 10
Independent Claim
120 words
A method for determining the tuned frequency of a multiconversion radio having local oscillators including a high frequency oscillator, a second frequency oscillator, and a beat frequency oscillator comprising, in combination, obtaining a numerical count indicative of the frequency of oscillation of the high frequency oscillator during a first time interval, obtaining a numerical count indicative of the frequency of oscillation of the second frequency oscillator during a second time interval; obtaining a numerical count indicative of the frequency of oscillation of the beat frequency oscillator during a third time interval; subtracting the counts of the second frequency oscillator and the beat frequency oscillator from the count of the high frequency oscillator; and displaying a number indicative of the result.
Claim 11
Dependent Claim
35 words
A method according to claim 8 wherein said steps of obtaining numerical counts of the high frequency oscillator, second frequency oscillator, and beat frequency oscillator include prescaling each of said counts by the same factor.
Claim 12
Dependent Claim
56 words
A method according to claim 8 wherein said counts are obtained during first, second and third time intervals of equal time duratin, one immediately following the other, said counts are repeated during successive time periods; and the number indicative of the result obtained from an immediately preceding count is displayed while performing the next counting operation.
Claim 13
Dependent Claim
33 words
A method according to claim 9 wherein said steps of obtaining the counts includes obtaining the counts during equal millisecond time intervals each of which is an integer multiple of said prescaling factor.
Claim 14
Dependent Claim
90 words
Apparatus for determining the tuned frequency of a multiconversion radio wave device, comprising, in combination, first means for deriving a numerical count indicative of the frequency of oscillation of a first local oscillator of the radio device; second means for deriving a numerical count indicative of the frequency of oscillation of a second local oscillator of the radio device; additional means for combining said counts in a predetermined algebraic sense; and means responsive to said additional means for displaying a number indicative of the tuned frequency of the radio device.
Claim 15
Dependent Claim
90 words
Apparatus for determining the tuned frequency of a multiconversion radio wave device, comprising, in combination, first means for deriving a numerical count indicative of the frequency of oscillation of a first local oscillator of the radio device; second means for deriving a numerical count indicative of the frequency of oscillation of a second local oscillator of the radio device; additional means for combining said counts in a predetermined algebraic sense; and means responsive to said additional means for displaying a number indicative of the tuned frequency of the radio device.
Claim 16
Dependent Claim
59 words
Apparatus according to claim 12 wherein the apparatus further includes, third means for deriving a numerical count indicative of the frequency of oscillation of a third local oscillator of the radio device; and wherein, said additional means for combining said counts includes means for combining the counts from the first, second and third means in a predetermined algebraic sense.
Claim 17
Dependent Claim
31 words
Apparatus according to claim 13 wherein said apparatus further includes sequencer means for connecting the signals from said first, second and third means to said additional means in a predetermined sequence.
Claim 18
Dependent Claim
30 words
Apparatus according to claim 14 wherein said sequencer means includes means for connecting the signals from said first, second and third means to said combining means for equal time iNtervals.
Claim 19
Dependent Claim
89 words
Apparatus for determining the tuned frequency of a multiconversion radio wave device comprising, in combination, first means for deriving a signal indicative of the frequency of oscillation of a first local oscillator of the radio device; second means for deriving a signal indicative of the frequency of oscillation of a second local oscillator of the radio device; and additional means for combining the signals from the first and second means in a predetermined algebraic sense to derive a signal indicative of the tuned frequency of the radio wave device.
Claim 20
Dependent Claim
89 words
Apparatus for determining the tuned frequency of a multiconversion radio wave device comprising, in combination, first means for deriving a signal indicative of the frequency of oscillation of a first local oscillator of the radio device; second means for deriving a signal indicative of the frequency of oscillation of a second local oscillator of the radio device; and additional means for combining the signals from the first and second means in a predetermined algebraic sense to derive a signal indicative of the tuned frequency of the radio wave device.
Claim 21
Dependent Claim
31 words
Apparatus according to claim 16 wherein said apparatus further includes, display means responsive to said additional means for displaying a result indicative of the tuned frequency of the radio wave device.
Claim 22
Dependent Claim
82 words
Apparatus according to claim 16 wherein said first means derives a pulse train signal indicative of a numerical count of the frequency of oscillation of the first local oscillator of the radio device; said second means derives a pulse train signal indicative of a numerical count of the frequency of oscillation of the second local oscillator of the radio device; and said additional means includes counter means combining the numerical counts from said first and second means in a predetermined algebraic sense.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |