US3077542A
Expired / Lapsed
US
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Load control device
Assignee: Robertshaw Controls Co
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Filing: 1959-06-08
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Granted: 1963-02-12
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Expires: 1979-06-08
Abstract
No abstract record available.
Inventors
- 👤 Robert L Daugherty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:09
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/12; H02J3/14; H02J2105/00; H02J2105/50; H02J2105/52; Y; Y02; Y02B; Y02B70/00; Y02B70/30; Y02B70/3225; Y04; Y04S; Y04S20/00; Y04S20/20; Y04S20/222
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
111 words
IN AN ELECTRICAL CONTROL APPARATUS FOR A PLURALITY OF ELECTRICAL DEVICES CONNECTED IN FIRST AND SECOND CIRCUITS, TERMINAL MEANS ADAPTED TO BE CONNECTED TO A VOLTAGE SOURCE, CIRCUIT MEANS INTERCONNECTING SAID TERMINAL MEANS AND SAID FIRST AND SECOND CIRCUITS, MEANS RESPONSIVE TO AN OVERLOAD CONDITION IN SAID FIRST CIRCUIT FOR SEQUENTIALLY DISCONNECTING FROM SAID VOLTAGE SOURCE DIFFERENT ONES OF THE ELECTRICAL DEVICES IN SAID SECOND CIRCUIT SO THAT LESS THAN ALL OF THE ELECTRICAL DEVICES ARE CONNECTED TO SAID VOLTAGE SOURCE AT ANY TIME FOLLOWING THE OCCURRENCE OF AN OVERLOAD CONDITION, AND INCLUDING A TIMER MOTOR MEANS ASSOCIATED WITH SAID DISCONNECTING MEANS AND ENERGIZED BY THE OCCURRENCE OF SAID OVERLOAD CONDITION.
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) | 1966-02-11 | 1966-08-13 | 1967-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-11 | 1970-08-13 | 1971-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-11 | 1974-08-13 | 1975-02-12 | $7700.00 | Window Closed / Lapsed |