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Patent US3777288A successfully refreshed from Google Patents.
US3777288A
Expired / Lapsed
US
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Plural band channel selector having selector knobs controlling respective ones of a plurality of tuners
Assignee: Panasonic Holdings Corp
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Filing: 1972-05-25
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Granted: 1973-12-04
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Expires: 1992-05-25
Abstract
Abstract A channel selector is provided which has means for detecting the channel selector knobs of a VHF and UHF tuner touched by a viewer so that in response to the signal from the detecting means, the VHF or UHF tuner may be automatically energized whereas the other tuner is deactivated. Thus, only the desired tuner is energized in channel selection, and the channel selection may be made in one step.
Inventors
- 👤 O Fujita
- 👤 T Kitao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:29
CPC Classifications
H; H03; H03J; H03J5/00; H03J5/24; H03J5/242; H03J3/00; H03J3/02; H03J3/06; H03J3/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
80 words
A channel selector comprising a. a plurality of tuners each capable of being tuned to a different frequency band, b. a plurality of channel selector knobs with each of said knobs controlling respective ones of said plurality of tuners, c. means for detecting the manual selection of one of said channel selector knobs associated with a desired one of said plurality of tuners, and d. automatic control means connected to said means for detecting for actuating only the selected tuner.
Claim 2
Dependent Claim
80 words
A channel selector comprising a. a plurality of tuners each capable of being tuned to a different frequency band, b. a plurality of channel selector knobs with each of said knobs controlling respective ones of said plurality of tuners, c. means for detecting the manual selection of one of said channel selector knobs associated with a desired one of said plurality of tuners, and d. automatic control means connected to said means for detecting for actuating only the selected tuner.
Claim 3
Dependent Claim
23 words
A channel selector as defined in claim 1, wherein said automatic control means de-energizes all of said tuners except for said selected tuner.
Claim 4
Dependent Claim
25 words
A channel selector unit as defined in claim 1 wherein said means for detecting detects the manual touching of one of said channel selector knobs.
Claim 5
Dependent Claim
87 words
A channel selector as defined in claim 3, wherein at least the front surface of each channel selector of said plurality of tuners is made of an electrically conducting material, and said detecting means is provided for each of said plurality of tuners and comprises an oscillator circuit having a frequency output having an amplitude which changes when one of the channel selector knobs is touched, and a detector circuit coupled to said oscillator circuit for sensing the changed amplitude produced when said selector knob is touched.
Claim 6
Dependent Claim
67 words
A channel selector as defined in claim 3 wherein at least the front surface of each channel selector of said plurality of tuners is made of an electrically conducting material, and said detecting means is provided for each of said plurality of tuners and comprises a circuit for generating a hum voltage when the channel selector knob is touched and a circuit for detecting said hum voltage.
Claim 7
Dependent Claim
96 words
A channel selector as defined in claim 3, wherein said automatic control means is provided for each of said plurality of tuners and comprises a memory circuit which in response to a signal from said detecting means stores a signal representing the touching of said selected channel selector knob of one of said plurality of tuners, a DC power source and an AGC circuit coupled to each of said plurality of tuners through switching circuits, said plurality of tuners being controlled in response to the output from said memory circuit applied to its associated switching circuit.
Claim 8
Dependent Claim
62 words
A channel selector as defined in claim 6 wherein each of said plurality of tuners comprises a VHF tuner and UHF tuner, said memory circuit comprising a flip-flop, two detecting means coupled to respective inputs of said flip-flop, the output terminals of said flip-flop being connected to said switching circuit associated with said tuners, to effectuate control of said plurality of tuners.
Claim 9
Dependent Claim
93 words
A channel selector as defined in claim 7 wherein said VHF tuner comprises a high frequency amplifier, a local oscillator circuit, and a mixer circuit, a switch inserted in said switching circuits for connecting power to said UHF tuner and to said mixer circuit when the channel selectOr knob of said UHF tuner is touched, and a selection circuit inserted in said switching circuit for switching said mixer circuit to function as a circuit for amplifying the output of said UHF tuner when the channel selector knob of said UHF tuner is touched.
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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |