US3603732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instant-on circuitry for solid state television receivers
Assignee: RCA Licensing Corp
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Filing: 1969-06-05
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Granted: 1971-09-07
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Expires: 1989-06-05
Abstract
Abstract In a solid state television receiver, the primary windings of a main and an auxiliary transformer are both coupled across an AC input line. A single-pole, single-throw switch interposed in one conductor of AC input line subsequent to auxiliary transformer takeoff point permits deenergization of main transformer primary winding without interrupting energization of auxiliary transformer primary winding. One secondary winding of main transformer provides AC input to television receiver power supply. Kinescope filament is energized by circuit comprising a secondary winding of auxiliary transformer in series with an additional secondary winding of main transformer. When switch is closed, receiver is ''''on'''' with power supply operative and kinescope filament receiving full rated voltage comprising sum of secondary contributions. When switch is open, receiver is in ''''standby'''' condition- with power supply inoperative, but kinescope filament energized at reduced level representing contribution of auxiliary transformer secondary alone. In remote control embodiment, auxiliary transformer has additional secondary winding providing AC input to remote control receiver power supply.
Inventors
- 👤 John Barrett George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:26
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/63; H02; H02M; H02M1/00; H02M1/0003; H02M1/0032; H04W; H04W52/00; H04W52/02; H04W52/0209; H04W52/0261; H04W52/0274; Y; Y02; Y02B; Y02B70/00; Y02B70/10; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
317 words
In a television receiver including signal processing stages requiring a unidirectional operating potential, an image reproducing tube of a thermionic type incorporating a heater structure, having a pair of supply terminals, and an alternating current input line adapted for connection to an alternating current source, the combination comprising: a first transformer having a primary winding and a plurality of secondary windings; a second transformer having a primary winding, a first secondary winding and an additional secondary winding; switching means associated with said alternating current input line for permitting energization of said primary winding of said first transformer by alternating current from said source in a first switching state and for precluding energization of said primary winding of said transformer by alternating current from said source in a second switching state; means coupling the primary winding of said second transformer to said alternating current input line in a manner permitting energization of the primary winding of said second transformer with alternating current from said source in either of the switching states of said switching means; a television receiver power supply for developing said unidirectional operating potential in response to an alternating current input; means for utilizing one of the secondary windings of said first transformer to supply said alternating current input to said power supply; means for serially connecting and additional one of the secondary windings of said first transformer and said first secondary winding of said second transformer across said supply terminals of said heater structure; a remote control receiver having a plurality of outputs, one of said outputs serving to control said switching means, and requiring a unidirectional supply potential for operability; remote control receiver power supply means for developing said unidirectional supply potential in response to an alternating current input; and means for utilizing said additional secondary winding of said second transformer to supply said alternating current input to said remote control receiver power supply.
Claim 2
Dependent Claim
317 words
In a television receiver including signal processing stages requiring a unidirectional operating potential, an image reproducing tube of a thermionic type incorporating a heater structure, having a pair of supply terminals, and an alternating current input line adapted for connection to an alternating current source, the combination comprising: a first transformer having a primary winding and a plurality of secondary windings; a second transformer having a primary winding, a first secondary winding and an additional secondary winding; switching means associated with said alternating current input line for permitting energization of said primary winding of said first transformer by alternating current from said source in a first switching state and for precluding energization of said primary winding of said transformer by alternating current from said source in a second switching state; means coupling the primary winding of said second transformer to said alternating current input line in a manner permitting energization of the primary winding of said second transformer with alternating current from said source in either of the switching states of said switching means; a television receiver power supply for developing said unidirectional operating potential in response to an alternating current input; means for utilizing one of the secondary windings of said first transformer to supply said alternating current input to said power supply; means for serially connecting and additional one of the secondary windings of said first transformer and said first secondary winding of said second transformer across said supply terminals of said heater structure; a remote control receiver having a plurality of outputs, one of said outputs serving to control said switching means, and requiring a unidirectional supply potential for operability; remote control receiver power supply means for developing said unidirectional supply potential in response to an alternating current input; and means for utilizing said additional secondary winding of said second transformer to supply said alternating current input to said remote control receiver power supply.
Claim 3
Dependent Claim
65 words
Apparatus in accordance with claim 1 wherein the voltage developed across said additional secondary winding of said first transformer when said switching means is in said first switching state is significantly less than the voltage developed across said first secondary winding of said second transformer, the sum of said voltages being substantially equal to the full rated voltage for normal operation of said heateR structure.
Claim 4
Dependent Claim
286 words
In a remote controlled, solid state television receiver including (a) solid state television signal processing stages requiring unidirectional operating potentials of given levels for operability; (b) a kinescope having a filament structure extending between a pair of supply terminals and requiring a supply potential of a predetermined magnitude for normal operation; (c) a remote control receiver having a plurality of outputs for selectively adjusting operating parameters of said television receiver; said remote control receiver requiring a unidirectional supply potential for operability; and (d) an alternating current input line adapted for connection to an alternating current source; the combination comprising: television receiver power supply means for developing unidirectional operating potentials for said processing stages; a main power supply transformer having a primary winding and a pair of secondary windings; remote control receiver power supply means for developing said unidirectional supply potential for said remote control receiver; an auxiliary power supply transformer having a primary winding and a pair of secondary windings; means for coupling one of the secondary windings of said main transformer to said television receiver power supply means; means for coupling one of the secondary windings of said auxiliary transformer to said remote control receiver power supply means; means for connecting the remaining secondary windings of said main and said auxiliary transformers in series across said pair of supply terminals for said filament structure; means, including a single-pole, single-throw switch subject to control by one of said remote control receiver outputs, for coupling said primary winding of said main transformer to said alternating current input line only when said switch is closed; and means, independent of said single-pole, single-throw switch, for coupling said primary winding of said auxiliary transformer to said alternating current input line.
Claim 5
Dependent Claim
286 words
In a remote controlled, solid state television receiver including (a) solid state television signal processing stages requiring unidirectional operating potentials of given levels for operability; (b) a kinescope having a filament structure extending between a pair of supply terminals and requiring a supply potential of a predetermined magnitude for normal operation; (c) a remote control receiver having a plurality of outputs for selectively adjusting operating parameters of said television receiver; said remote control receiver requiring a unidirectional supply potential for operability; and (d) an alternating current input line adapted for connection to an alternating current source; the combination comprising: television receiver power supply means for developing unidirectional operating potentials for said processing stages; a main power supply transformer having a primary winding and a pair of secondary windings; remote control receiver power supply means for developing said unidirectional supply potential for said remote control receiver; an auxiliary power supply transformer having a primary winding and a pair of secondary windings; means for coupling one of the secondary windings of said main transformer to said television receiver power supply means; means for coupling one of the secondary windings of said auxiliary transformer to said remote control receiver power supply means; means for connecting the remaining secondary windings of said main and said auxiliary transformers in series across said pair of supply terminals for said filament structure; means, including a single-pole, single-throw switch subject to control by one of said remote control receiver outputs, for coupling said primary winding of said main transformer to said alternating current input line only when said switch is closed; and means, independent of said single-pole, single-throw switch, for coupling said primary winding of said auxiliary transformer to said alternating current input line.
Claim 6
Dependent Claim
71 words
Apparatus in accordance with claim 3 wherein the winding ratios associated with said main and auxiliary transformers are such that a supply potential of said predetermined magnitude is developed across said pair of supply terminals for said filament structure when said switch is closed, and a supply potential less than said predetermined magnitude but greater than half thereof is developed across said pair of supply terminals when said switch is open.
Claim 7
Dependent Claim
21 words
Apparatus in accordance with claim 3 also including a second single-pole, single-throw switch for selectively deenergizing both of said primary windings.
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) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |