Push-button operated overload-current switch with adjustable thermal trip
Abstract
Abstract A PUSH-BUTTON OPERATED OVERLOAD-CURRENT SWITCH WITH AN ADJUSTABLE THERMAL TRIP AND TRIP-FREE RELEASE, HAVING A CONTACT BRIDGE CONSTRUCTED AS AN ANGLED LEVER. THE CONTACT BRIDGE IS MOUNTED FREELY PIVOTABLE ON PROJECTIONS OF A SWITCH BRIDGE RIGIDLY CONNECTED TO A SWITCH ROD AND PUSH-BUTTON UNDER SPRING PRESSURE, AND IS MOVABLE IN THE AXIAL DIRECTION AGAINST THE FORCE OF A SPRING PRODUCING THE TRIP-FREE RELEASE, AND ON SWITHCING OFF, IS BROUGHT AT A CASING STOP INTO AN INCLINED POSITION, IN WHICH A SHOULDER OF THE CONTACT BRIDGE IS LOCATED IN THE RANGE OF MOVEMENT OF A DRIVER OF THE SWITCH BRIDGE, SO THAT ON THE RESETTING MOVEMENT OF THE PUSH-BUTTON, THE CONTACT BRIDGE IS CARRIED ALONG BY THE SWITCH BRIDGE DRIVER, AND IS BROUGHT TO ENGAGEMENT BEHIND A RETENTION NOSE OF THE BIMETALLIC STRIP. THE BIMETALLIC STRIP IS ADJUSTABLY CLAMPED AGAINST THE BASE BY A SCREW ARRANGED BETWEEN SPACED SUPPORTING PROJECTIONS. TIGHTENING OF THE SCREW CAUSES THE STRIP TO BEND SO AS TO LOWER THE TRIP CURRENT.
Inventors
- 👤 Jacob Ellenberger
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
No citation records indexed.
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 |