US3311795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic interlock circuit
Assignee: Applied Dynamics Inc
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Filing: 1964-04-22
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Granted: 1967-03-28
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Expires: 1984-04-22
Abstract
No abstract record available.
Inventors
- 👤 Edward O Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:07
CPC Classifications
H; H01; H01H; H01H47/00; H01H47/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
A RELAY INTERLOCK CIRCUIT, COMPRISING, IN COMBINATION: A PLURALITY OF SELECTIVELY OPERABLE SWITCHES; A PLURALITY OF ELECTROMAGNETIC RELAYS EACH INCLUDING AN OPERATING COIL AND A HOLDING CIRCUIT, EACH OF SAID HOLDING CIRCUITS BEING CONNECTED IN PARALLEL WITH A RESPECTIVE ONE OF SAID SWITCHES; A FIRST PLURALITY OF RESISTANCES; A FIRST TERMINAL AND A SECOND TERMINAL, EACH OF SAID SWITCHES BEING CONNECTED IN SERIES WITH A RESPECTIVE ONE OF SAID RESISTANCES BETWEEN SAID FIRST AND SECOND TERMINALS; A SECOND RESISTANCE CONNECTED IN SERIES WITH SAID SECOND TERMINAL; VOLTAGE SUPPLY MEANS CONNECTED BETWEEN SAID SECOND RESISTANCE AND SAID FIRST TERMINAL; A PLURALITY OF UNI-DIRECTIONAL CONDUCTION DEVICES, EACH OF SAID OPERATING COILS BEING CONNECTED IN SERIES WITH A RESPECTIVE ONE OF SAID DEVICES, IN SERIES WITH A RESPECTIVE ONE OF SAID SWITCHES, AND TO A THIRD TERMINAL; MEANS FOR SENSING THE AMOUNT OF CURRENT FLOWING THROUGH SAID SECOND RESISTANCE AND FOR PROVIDING A CONTROL SIGNAL; AND ELECTRONIC SWITCHING MEANS FOR SWITCHABLY APPLYING POWER TO SAID THIRD TERMINAL, SAID CONTROL SIGNAL BEING CONNECTED TO CONTROL SAID ELECTRONIC SWITCHING MEANS.
Claim 2
Dependent Claim
175 words
A RELAY INTERLOCK CIRCUIT, COMPRISING, IN COMBINATION: A PLURALITY OF SELECTIVELY OPERABLE SWITCHES; A PLURALITY OF ELECTROMAGNETIC RELAYS EACH INCLUDING AN OPERATING COIL AND A HOLDING CIRCUIT, EACH OF SAID HOLDING CIRCUITS BEING CONNECTED IN PARALLEL WITH A RESPECTIVE ONE OF SAID SWITCHES; A FIRST PLURALITY OF RESISTANCES; A FIRST TERMINAL AND A SECOND TERMINAL, EACH OF SAID SWITCHES BEING CONNECTED IN SERIES WITH A RESPECTIVE ONE OF SAID RESISTANCES BETWEEN SAID FIRST AND SECOND TERMINALS; A SECOND RESISTANCE CONNECTED IN SERIES WITH SAID SECOND TERMINAL; VOLTAGE SUPPLY MEANS CONNECTED BETWEEN SAID SECOND RESISTANCE AND SAID FIRST TERMINAL; A PLURALITY OF UNI-DIRECTIONAL CONDUCTION DEVICES, EACH OF SAID OPERATING COILS BEING CONNECTED IN SERIES WITH A RESPECTIVE ONE OF SAID DEVICES, IN SERIES WITH A RESPECTIVE ONE OF SAID SWITCHES, AND TO A THIRD TERMINAL; MEANS FOR SENSING THE AMOUNT OF CURRENT FLOWING THROUGH SAID SECOND RESISTANCE AND FOR PROVIDING A CONTROL SIGNAL; AND ELECTRONIC SWITCHING MEANS FOR SWITCHABLY APPLYING POWER TO SAID THIRD TERMINAL, SAID CONTROL SIGNAL BEING CONNECTED TO CONTROL SAID ELECTRONIC SWITCHING MEANS.
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) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |