US3714469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching circuit
Assignee: Panasonic Holdings Corp
•
Filing: 1971-08-27
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Granted: 1973-01-30
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Expires: 1991-08-27
Abstract
Abstract A switching circuit adapted for remote-control of a television receiver or the like, wherein there is provided a transistor having the collector and emitter thereof connected between a DC power source and a load, said transistor normally functioning as a voltage regulator, and by remote-control of the base current of said transistor, electric power being supplied to said load is turned on or off.
Inventors
- 👤 K Uchida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:05
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
72 words
A remote-control power source switching circuit comprising a transistor having the collector and emitter thereof connected between a DC power source and a load, a bias circuit for forward biasing said transistor thereby rendering it normally conductive said transistor normally functioning as a voltage regulator and a remote-control circuit for shorting said bias circuit, wherein said bias circuit is controlled by operating said remote-control circuit, so that said transistor is ''''on-off'''' controlled.
Claim 2
Dependent Claim
72 words
A remote-control power source switching circuit comprising a transistor having the collector and emitter thereof connected between a DC power source and a load, a bias circuit for forward biasing said transistor thereby rendering it normally conductive said transistor normally functioning as a voltage regulator and a remote-control circuit for shorting said bias circuit, wherein said bias circuit is controlled by operating said remote-control circuit, so that said transistor is ''''on-off'''' controlled.
Claim 3
Dependent Claim
72 words
A remote-control power source switching circuit comprising a transistor having the collector and emitter thereof connected between a DC power source and a load, a bias circuit for forward biasing said transistor thereby rendering it normally conductive said transistor normally functioning as a voltage regulator and a remote-control circuit for shorting said bias circuit, wherein said bias circuit is controlled by operating said remote-control circuit, so that said transistor is ''''on-off'''' controlled.
Claim 4
Dependent Claim
72 words
A remote-control power source switching circuit comprising a transistor having the collector and emitter thereof connected between a DC power source and a load, a bias circuit for forward biasing said transistor thereby rendering it normally conductive said transistor normally functioning as a voltage regulator and a remote-control circuit for shorting said bias circuit, wherein said bias circuit is controlled by operating said remote-control circuit, so that said transistor is ''''on-off'''' controlled.
Claim 5
Dependent Claim
34 words
A remote-control power source switching circuit according to claim 1, wherein said bias circuit is provided with a circuit for controlling the conduction of said transistor by detecting a voltage imparted to the load.
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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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |