Patent US2553982A successfully refreshed from Google Patents.
Patent US3761738A successfully refreshed from Google Patents.
US3761738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remote control electrical circuit
Assignee: SWITCHPACK SYSTEMS Inc
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Filing: 1971-09-27
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Granted: 1973-09-25
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Expires: 1991-09-27
Abstract
Abstract The invention disclosed involves an electrical control circuit wherein a relatively low voltage is used to control a relatively high voltage and includes switching means in the low voltage circuit and means responsive to said switching means for generating a low voltage pulse upon closing said switch, and switching means in the high voltage circuit responsive to the low voltage pulse to become conductive.
Inventors
- 👤 A Kay
- 👤 S Messin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:57
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03K17/725; H01; H01B; H01B7/00; H01B7/08; H01B7/0815; H03K17/722; H03K17/723
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
135 words
An electrical circuit adapted to actuate relatively high voltage electrical switching means comprising: electronic switching means in series with said high voltage electrical switching means for operatively connecting the same to a source of high voltage current, said electronic switching means being of a type which is rendered conductive of the high voltage current to actuate said high voltage electrical switching means only by a control pulse of sufficient magnitude applied thereto and which is maintained in said conductive state only by applying further such pulSes thereto; a relatively low voltage control circuit including control switching means; and pulsing means rendered operative at one condition of said control switching means for providing to said electronic switching means only one control pulse of said magnitude while said control switching means is maintained in said one condition.
Claim 2
Dependent Claim
135 words
An electrical circuit adapted to actuate relatively high voltage electrical switching means comprising: electronic switching means in series with said high voltage electrical switching means for operatively connecting the same to a source of high voltage current, said electronic switching means being of a type which is rendered conductive of the high voltage current to actuate said high voltage electrical switching means only by a control pulse of sufficient magnitude applied thereto and which is maintained in said conductive state only by applying further such pulSes thereto; a relatively low voltage control circuit including control switching means; and pulsing means rendered operative at one condition of said control switching means for providing to said electronic switching means only one control pulse of said magnitude while said control switching means is maintained in said one condition.
Claim 3
Dependent Claim
26 words
An electrical circuit according to claim 1 wherein said high voltage electrical switching means is arranged to make and break a circuit on successive actuations thereof.
Claim 4
Dependent Claim
26 words
An electrical circuit according to claim 2 wherein said pulsing means is connected to provide said control pulse during a half cycle of an alternating current.
Claim 5
Dependent Claim
44 words
An electrical circuit according to claim 3 wherein said high voltage electric switching means, said electronic switching means and said control circuit are connected across the same source of high voltage alternating current and said control circuit includes voltage reducing means and rectifying means.
Claim 6
Dependent Claim
19 words
An electrical circuit according to claim 4 wherein said high voltage switching means is a ratchet type solenoid switch.
Claim 7
Dependent Claim
33 words
An electrical circuit according to claim 1 wherein said pulsing means is arranged to provide a series of pulses to said electronic switching means only the first of which is of said magnitude.
Claim 8
Dependent Claim
92 words
An electrical circuit according to claim 1 wherein said pulsing means includes a transistor having its emitter electrode connected to provide pulses to said electronic switching means, circuitry connected between the base of the transistor and said control switching means for rendering said transistor conductive only while said control switching means is in said one position, a capacitor connected to the collector of the transistor to be discharged when the transistor is rendered conductive, and circuit means connected to said consenser to fully charge the same only when the transistor is non-conducting.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |