Circuit breaker with an undervoltage trip device
Abstract
Abstract A CIRCUIT BREAKER COMPRISING A PAIR OF SEPARABLE CONTACTS AND AN AUTOMATICALLY RESETTABLE MECHANISM, INCLUDING A LATCH, FOR OPENING AND CLOSING THE CONTACTS. AN ELECTROMAGNETIC DEVICE ASSOCIATED WITH THE MECHANISM FOR TRIPPING THE LATCH AND AUTOMATICALLY OPENING THE CONTACTS. THE ELECTROMAGNETIC DEVICE COMPRISING A SOLENOID COIL AND AN ARMATURE-LIKE MEMBER ENGAGEABLE WITH THE LATCH TO UNLATCH THE MECHANISM WHEN THE CONTACTS ARE CLOSED. A MAGNETIZABLE CORE DEVICE ACTUATABLE BY THE COIL TO RELEASE THE ARMATURE-LIKE MEMBER AND PERMIT IT TO MOVE AWAY FROM THE LATCH WHEN THE COIL IS ENERGIZED ABOVE A PREDETERMINED LEVEL AND FOR MOVING THE ARMATURELIKE MEMBER INTO ENGAGEMENT WITH THE LATCH WHEN THE COIL IS ENERGIZED BELOW A PREDETERMINED LEVEL AND THE CONTACTS ARE CLOSED. FURTHER, SUCH CIRCUIT BREAKER MAY BE USED IN COMBINATION WITH A KNOWN CIRCUIT BREAKER WHICH SENSES AN INCREASE IN ENERGIZATION TO PROVIDE A TWO POLE UNIT ONE OF WHICH IS SENSITIVE TO AN INCREASE IN ENERGIZATION AND THE OTHER WHICH IS SENSITIVE TO A DECREASE IN ENERGIZATION.
Inventors
- 👤 Arthur T Ellis Jr
Bibliographic Details
Claims Analysis
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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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |