Patent US3755743A successfully refreshed from Google Patents.
US3755743A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal receiver with a plurality of tuners and automatic switching system for cyclically energizing the same
Assignee: Electrohome Ltd
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Filing: 1972-04-10
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Granted: 1973-08-28
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Expires: 1992-04-10
Abstract
Abstract A signal receiver such as a television receiver has first and second tuners such as a VHF tuner and a UHF tuner. The tuners are capable of being simultaneously rendered into a number of different tuned conditions in each of which, when the tuners are energized, they will be tuned to signal within their respective frequency bands. When one of the tuners is rendered into a particular condition that preferably is different from the aforesaid tuned condition, the tuners are automatically alternately energized cyclically for predetermined periods of time to render the one of the tuners so energized capable of translating signals received by the receiver and within the frequency band of the respective tuner when that tuner is rendered into a tuned condition. Means are provided responsive to one of the tuners being rendered into a tuned state while energized for maintaining the energized tuner in its energized condition while the receiver is on until the aforesaid one tuner is rendered into the aforesaid particular condition.
Inventors
- 👤 Lernon M Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:03
CPC Classifications
H; H03; H03J; H03J1/00; H03J1/18; H03J5/00; H03J5/02; H03J5/0218; H03J5/24; H03J5/242; H03J5/244; H03J7/00; H03J7/18; H03J7/20; H03J7/24
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
201 words
In a signal receiver of a type having first and second tuners for translating signals in first and second different frequency bands respectively and means for simultaneously rendering said first and second tuners into any one of a plurality of different conditions in each of which, upon being energized, said first and second tuners are tuned to and are adapted to translate signals received by said receiver within said first and second frequency bands respectively; the improvement comprising means responsive to said first tuner being in a predetermined condition to which said first tuner is adapted to be rendered by said rendering means for automatically, alternately energizing said first and second tuners cyclically each for predetermined periods of time to render the one of said tuners so energized capable of translating signals received by said receiver within said frequency band of said one tuner when said one tuner is rendered into any one of said plurality of different conditions and responsive to said one tuner being rendered into any one of said plurality of different conditions while so energized for maintaining said one tuner energized while said receiver is turned on until said first tuner is rendered into said predetermined condition.
Claim 2
Dependent Claim
201 words
In a signal receiver of a type having first and second tuners for translating signals in first and second different frequency bands respectively and means for simultaneously rendering said first and second tuners into any one of a plurality of different conditions in each of which, upon being energized, said first and second tuners are tuned to and are adapted to translate signals received by said receiver within said first and second frequency bands respectively; the improvement comprising means responsive to said first tuner being in a predetermined condition to which said first tuner is adapted to be rendered by said rendering means for automatically, alternately energizing said first and second tuners cyclically each for predetermined periods of time to render the one of said tuners so energized capable of translating signals received by said receiver within said frequency band of said one tuner when said one tuner is rendered into any one of said plurality of different conditions and responsive to said one tuner being rendered into any one of said plurality of different conditions while so energized for maintaining said one tuner energized while said receiver is turned on until said first tuner is rendered into said predetermined condition.
Claim 3
Dependent Claim
13 words
The invention according to claim 1 wherein said rendering means include a motor.
Claim 4
Dependent Claim
22 words
The invention according to claim 2 wherein said rendering means include a remote control system for controlling the operation of said motor.
Claim 5
Dependent Claim
22 words
The invention according to claim 1 wherein said signal receiver is a television receiver and said tuners are VHF and UHF tuners.
Claim 6
Dependent Claim
22 words
The invention according to claim 3 wherein said signal receiver is a television receiver and said tuners are VHF and UHF tuners.
Claim 7
Dependent Claim
84 words
The invention according to claim 5 wherein one of said tuners is a varactor tuner and the other of said tuners is a tuner of a type having a rotor tuning device, said rendering means including a source of tuning voltages for said varactor tuner, switching means connected between said source and said varactor tuner for supplying different ones of said tuning voltages to said varactor tuner, and means drivingly connecting said motor and both of said rotary tuning device and said switching means.
Claim 8
Dependent Claim
27 words
The invention according to claim 6 wherein said other tuner is a turret tuner having a rotary turret and said rotary tuning device is said rotary turret.
Claim 9
Dependent Claim
36 words
The invention according to claim 5 wherein each of said tuners is of a type having a rotary tuning device, said rendering means including means drivingly connecting said motor and both of said rotary tuning devices.
Claim 10
Dependent Claim
63 words
The invention according to claim 5 wherein each of said tuners is a varactor tuner, said rendering means including at least one source of tuning voltages for said varactor tuners, switching means connected between each said source and said varactor tuners for supplying different ones of said tuning voltages to said varactor tuners, and means drivingly connecting said motor and said switching means.
Claim 11
Dependent Claim
58 words
The invention according to claim 1 wherein said predetermined condition is one in which said first tuner is untuned to a signal within said first frequency band, said second tuner being in a condition when said first tuner is in said predetermined condition in which said second tuner is untuned to a signal within said second Frequency band.
Claim 12
Dependent Claim
61 words
The invention according to claim 1 wherein said responsive means include DC potential source means for energizing said tuners, first and second switching means connected between said source means and respective ones of said tuners and means for simultaneously opening one and closing the other of said switching means and alternately simultaneously closing said one and opening said other switching means.
Claim 13
Dependent Claim
80 words
The invention according to claim 1 wherein said responsive means include a pulse source, means responsive to said first tuner being in said predetermined condition for rendering said pulse source operative to produce pulses and responsive to said first tuner being in any one of said plurality of conditions for rendering said pulse source inoperative to produce pulses and means responsive to said pulses for automatically, alternately energizing said first and second tuners cyclically each for predetermined periods of time.
Claim 14
Dependent Claim
112 words
The invention according to claim 1 wherein said responsive means include a pulse source, means responsive to said first tuner being in said predetermined condition for rendering said pulse source operative to produce pulses and responsive to said first tuner being in any one of said plurality of conditions for rendering said pulse source inoperative to produce pulses, DC potential source means for energizing said tuners, first and second switching means connected between said source means and respective ones of said tuners, and means responsive to said pulses for simultaneously opening one and closing the other of said switching means and alternately simultaneously closing said one and opening said other switching means.
Claim 15
Dependent Claim
58 words
The invention according to claim 13 wherein said predetermined condition is one in which said first tuner is untuned to a signal within said first frequency band, said second tuner being in a condition when said first tuner is in said predetermined condition in which said second tuner is untuned to a signal within said second frequency band.
Claim 16
Dependent Claim
40 words
The invention according to claim 14 wherein said rendering means include a motor and a remote control system for controlling the operation of said motor, said signal receiver being a television receiver and said tuners being UHF and VHF tuners.
References Cited (Backward Citations)
US3624509A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |