US3386013A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state timer for a two coil relay
Assignee: Duracell Inc USA
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Filing: 1965-09-30
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Granted: 1968-05-28
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Expires: 1985-09-30
Abstract
No abstract record available.
Inventors
- 👤 James A Hirsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:30
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/28; H03K17/292; H01; H01H; H01H47/00; H01H47/02; H01H47/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
AN ELECTRONIC TIMER COMPRISING: A SOURCE OF DIRECT CURRENT VOLTAGE; A RELAY MEANS FOR OPERATING ELEMENTS OF AN APPLIANCE BEING CONTROLLED BY SAID TIMER, SAID RELAY MEANS HAVING A FIRST COIL AND A SECOND COIL IDENTICALLY WOUND AND COUPLED IN SERIES SO THAT CURRENT FLOW THROUGH BOTH OF SAID COILS PRODUCES A NET MAGNETO-MOTIVE FORCE OF ESSENTIALLY ZERO; AN ELECTRONIC SWITCHING MEANS; A CIRCUIT MEANS FOR CONNECTING SAID ELECTRONIC SWITCHING MEANS FROM A MIDPOINT BETWEEN SAID FIRST AND SAID SECOND COILS AND A FIRST SIDE OF SAID DIRECT CURRENT VOLTAGE SOURCE; A MEANS FOR ENERGIZING SAID ELECTRONIC SWITCHING MEANS AFTER A PREDETERMINED TIME PERIOD CONNECTED THERETO; AND SAID SECOND COIL BEING EFFECTIVELY SHORTED OUT BY SAID ELECTRONIC SWITCHING MEANS TO PERMIT CURRENT FLOW THROUGH SAID FIRST COIL, THEREBY ENERGIZING SAID RELAY.
Claim 2
Dependent Claim
131 words
AN ELECTRONIC TIMER COMPRISING: A SOURCE OF DIRECT CURRENT VOLTAGE; A RELAY MEANS FOR OPERATING ELEMENTS OF AN APPLIANCE BEING CONTROLLED BY SAID TIMER, SAID RELAY MEANS HAVING A FIRST COIL AND A SECOND COIL IDENTICALLY WOUND AND COUPLED IN SERIES SO THAT CURRENT FLOW THROUGH BOTH OF SAID COILS PRODUCES A NET MAGNETO-MOTIVE FORCE OF ESSENTIALLY ZERO; AN ELECTRONIC SWITCHING MEANS; A CIRCUIT MEANS FOR CONNECTING SAID ELECTRONIC SWITCHING MEANS FROM A MIDPOINT BETWEEN SAID FIRST AND SAID SECOND COILS AND A FIRST SIDE OF SAID DIRECT CURRENT VOLTAGE SOURCE; A MEANS FOR ENERGIZING SAID ELECTRONIC SWITCHING MEANS AFTER A PREDETERMINED TIME PERIOD CONNECTED THERETO; AND SAID SECOND COIL BEING EFFECTIVELY SHORTED OUT BY SAID ELECTRONIC SWITCHING MEANS TO PERMIT CURRENT FLOW THROUGH SAID FIRST COIL, THEREBY ENERGIZING SAID RELAY.
References Cited (Backward Citations)
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US3155879A
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US3162772A
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US3250891A
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US3325696A
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US3277348A
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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) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |