US3873894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power supply control system
Assignee: Sony Corp
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Filing: 1973-09-18
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Granted: 1975-03-25
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Expires: 1993-09-18
Abstract
Abstract A circuit for manually and remotely controlling a power supply for an electric apparatus. A remotely controllable power switch is provided for the electric apparatus and is controlled by a relay which is driven by a flip-flop circuit taking first and second states alternately in response to separate remote control signals. A manually controllable power switch is also provided and is connected in series with a predetermined one of switching elements of the flip-flop circuit. As a result, the power supply to the electric apparatus can be controlled by the manually controllable power switch independently of the remotely controllable power switch.
Inventors
- 👤 Tadashi Sato
- 👤 Hisao Okada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:01
CPC Classifications
H; H03; H03J; H03J1/00; H03J1/18; H03J9/00; H03J9/04; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/286; H04; H04W; H04W52/00; H04W52/02; H04W52/0209; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
142 words
A system for controlling the supply of electric power to an electric apparatus from an external power source, the system comprising, a bistable flip-flop circuit comprising first and second switching elements; circuit means connected to said switching elements to make said first switching element preferentially conductive upon the application of operating voltage to said flip-flop circuit; a remotely controllable power switch controlled by the flip-flop circuit, the electric power source being connected to the electric apparatus through the remotely controllable power switch; a remote control signal processing circuit for supplying a remote control triggering signal to the flip-flop circuit to thereby control the remotely controllable power switch; and a manually controllable power switch connected in series with said second switching element of the flip-flop circuit to control the supply of power to the electric apparatus independently of the remotely controllable power switch.
Claim 2
Independent Claim
142 words
A system for controlling the supply of electric power to an electric apparatus from an external power source, the system comprising, a bistable flip-flop circuit comprising first and second switching elements; circuit means connected to said switching elements to make said first switching element preferentially conductive upon the application of operating voltage to said flip-flop circuit; a remotely controllable power switch controlled by the flip-flop circuit, the electric power source being connected to the electric apparatus through the remotely controllable power switch; a remote control signal processing circuit for supplying a remote control triggering signal to the flip-flop circuit to thereby control the remotely controllable power switch; and a manually controllable power switch connected in series with said second switching element of the flip-flop circuit to control the supply of power to the electric apparatus independently of the remotely controllable power switch.
Claim 3
Dependent Claim
35 words
A power supply control system according to claim 1 wherein the remotely controllable power switch comprises a relay having a winding connected in series with said second switching element; and a pair of switching contacts.
Claim 4
Dependent Claim
25 words
A power supply control system according to claim 2 wherein the winding of the relay is connected in series with the manually controllable power switch.
Claim 5
Dependent Claim
38 words
A power supply control system according to claim 3 wherein an operating voltage for the remote control signal processing circuit is derived from a connection point of the manually controllable power switch and the winding of the relay.
Claim 6
Dependent Claim
32 words
A power supply control system according to claim 1 wherein the operating voltage for the flip-flop circuit and for the remote control signal processing circuit is derived from the electric power source.
Claim 7
Dependent Claim
34 words
A power supply control system according to claim 5 wherein said circuit means to make said first switching element preferentially conductive comprises a time constant circuit connected in series with said electric power source.
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) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |