Circuit breaker including improved protective device
Abstract
Abstract A CIRCUIT BREAKER INCLUDING SEPARABLE CONTACTS, AN OPERATING MEANS OR MECHANISM FOR OPENING AND FOR CLOSING AND LATCHING IN THE CONTACTS, AND AN OVERCURRENT PROTECTIVE DEVICE INCLUDING MEANS WHICH ARE RESPONSIVE TO THE CURRENT IN THE SEPARABLE CONTACTS AND AN ELECTRICAL CIRCUIT WHICH IS BEING PROTECTED BY THE CIRCUIT BREAKER TO TO ACTUATE THE OPERATING MEANS OF THE CIRCUIT BREAKER TO OPEN SAID CONTACTS UPON THE OCCURRENCE OF PREDETERMINED OPERATING CONDITIONS. THE PROTECTIVE DEVICE INCLUDES MEANS WHICH ACTUATE SAID OPERATING MEANS AFTER A PREDETERMINED TIME DELAY WHICH MAY VARY INVERSELY WITH THE CURRENT FOR CERTAIN OVERCURRENTS OR WHICH MAY BE SUBSTANTIALLY FIXED OR OF A PREDETERMINED DURATION FOR CERTAIN OVERCURRENTS AND AT LEAST ONE MEANS WHICH IS RESPONSIVE SUBSTANTIALLY INSTANTANEOUSLY WHEN THE CURRENT IN THE ASSOCIATED CONTACTS OR ELECTRICAL CIRCUIT EXCEEDS OR INCRESES ABOVE A PREDETERMINED VALUE AND ADDITIONAL MEANS WHICH IS CONNECTED TO RENDER THE LAST-MENTIONED MEANS INOPERATIVE OR TO INHIBIT ITS OPERATION DURING CERTAIN OPERATING CONDITIONS OF THE CIRCUIT BREAKER EVEN WHEN THE CURRENT IN THE CONTACTS IS RELATIVELY LOW COMPARED WITH THE CONTINUOUS CURRENT RATING OF THE CIRCUIT BREAKER.
Inventors
- 👤 J Skeehan
- 👤 W South
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |