Overcurrent protective device
Abstract
Abstract An overcurrent protective device of the time delay type is provided which is responsive to the current in an electrical circuit which is being protected to actuate the tripping or opening of an associated circuit breaker upon the occurrence of predetermined operating conditions. The protective device includes a first means which is responsive substantially instantaneously when the current in the protected circuit exceeds a predetermined value and second means which is responsive to certain overcurrents after a predetermined time delay which may vary inversely with the overcurrent and the associated circuit breaker includes a means which is operatively connected to the first means of the protective device to render the first means inoperative or to inhibit the operation of the first means of the protective device during certain operating conditions of the associated circuit breaker.
Inventors
- 👤 William H South
- 👤 John H Taylor
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-11-23 | 1974-05-25 | 1974-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-11-23 | 1978-05-25 | 1978-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-11-23 | 1982-05-25 | 1982-11-24 | $7700.00 | Window Closed / Lapsed |