Circuit breaker with low short circuit magnetic tripping means
Abstract
Abstract AN ELECTRICAL CIRCUIT INTERRUPTER HAS A MOVABLE CONTACT CARRIED BY A CONTACT OPERATING MEMBER FOR MOVEMENT RELATIVE TO STATIONARY CONTACTS BETWEEN CLOSED AND OPEN CIRCUIT POSITIONS. OPERATING MEANS WILL MOVE THE OPERATING MEMBER FROM CLOSED TO OPEN CIRCUIT POSITION UPON RELEASE OF LATCHING MEANS ENGAGED THEREWITH. THE CONTACT OPERATING MEMBER CARRIES AN ARMATURE WHICH IS SUBJECT TO THE MAGNETIC ATTRACTION OF A SOLENOID COIL SO AS TO BE MOVABLE TO OPEN CIRCUIT POSITION UPON PASSAGE OF A SHORT CIRCUIT CURRENT OF PREDETERMINED MAGNITUDE THERETHROUGH. A SECOND ARMATURE ALSO ACTED UPON BY THE MAGNETIC FIELD OF THE SOLENOID COIL IS MOVABLE INTO A CIRCUIT OPENING POSITION UPON PASSAGE THROUGH THE SOLENOID COIL OF A LESSER SHORT CIRCUIT CURRENT AND ACTS UPON THE LATCHING MEANS DURING SUCH MOVEMENT TO RELEASE THE OPERATING MEANS FOR AUTOMATIC OPERATION THEREOF.
Inventors
- 👤 Eldon B Heft
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) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |