Circuit breaker including improved overcurrent protective device
Abstract
Abstract A CIRCUIT BREAKER INCLUDING AN OVERCURRENT PROTECTIVE DEVICE OF THE INVERSE TIME DELAY TYPE WHICH IS RESPONSIVE TO THE CURRENT IN AN ELECTRICAL CIRCUIT WHICH IS BEING PROTECTED BY THE ASSOCIATED CIRCUIT BREAKER. THE PROTECTIVE DEVICE MAY INCLUDE MEANS FOR PRODUCING PERIODIC PULSES OF CURRENT OF SUBSTANTIALLY A PREDETERMINED WIDTH AND OF SUBSTANTIALLY A PREDETERMINED FREQUENCY OR PULSE REPETITION RATE WHICH MAY BE ADJUSTABLE. THE MAGNITUDE OF SUCH PULSES VARIES WITH SUBSTANTIALLY THE SQUARE OF THE CURRENT OR THE HIGHEST LINE CURRENT IN THE PROTECTED CIRCUIT. WHEN THE CURRENT IN THE PROTECTED CIRCUIT INCREASES ABOVE OR EXCEEDS A PREDETERMINED VALUE OR LEVEL, THE PULSES OF CURRENT ARE APPLIED TO A TIMING OR INTEGRATING CAPACITOR TO PROVIDE A PREDETERMINED OUTPUT AFTER A TIME DELAY WHICH VARIES INVERSELY WITH SUBSTANTIALLY THE SQUARE OF THE CURRENT IN THE PROTECTED CIRCUIT.
Inventors
- 👤 J Engel
Bibliographic Details
Claims Analysis
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 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 |