Patent US3156789A successfully refreshed from Google Patents.
US3156789A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lever key switch with molded lever key
Assignee: Automatic Electric Laboratories Inc
•
Filing: 1961-04-06
•
Granted: 1964-11-10
•
Expires: 1981-04-06
Abstract
No abstract record available.
Inventors
- 👤 Kooy Vernon L Vander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:59
CPC Classifications
H; H01; H01H; H01H21/00; H01H21/02; H01H21/18; H01H21/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
241 words
IN A LEVER KEY SWITCH, AN ESCUTCHEON PLATE HAVING A SLOT THEREIN WITH VERTICAL ENDS, A FRAMEWORK SECURED TO AND DEPENDING FROM SAID PLATE WITH SWITCHING SPRINGS SECURED THERETO, A LEVER KEY PIVOTALLY MOUNTED IN SAID FRAME WITH ITS UPPER PORTION EXTENDING UPWARD THROUGH THE SLOT IN SAID ESCUTCHEON PLATE AND HAVING PROJECTIONS ON ITS LOWER PORTION FOR OPERATING THE SPRINGS WHEN THE KEY IS MOVED ABOUT ITS PIVOT, SAID KEY INTEGRALLY MOLDED IN ONE PIECE WITH ONE PORTION COMPRISING A THIN FLAT TAPERED SHANK EXTENDING UPWARD FROM ITS PIVOT POINT IN THE SHAPE OF A TRIANGLE WITH A THREADED PORTION EXTENDING UPWARD FROM THE UPPER APEX OF THE TRIANGULAR SHAPED PORTION TO WHICH A HANDLE MAY BE ATTACHED, THE LOWER PORTION OF THE KEY AT THE BASE OF THE TRIANGULAR SHAPED SHANK FORMED OF GREATER THICKNESS THAN SAID SHANK PORTION WITH A LARGE CAM SURFACE ON THE LOWER SIDE THEREOF ENGAGING THE SPRINGS WHEN THE KEY IS OPERATED AND WITH UPPER CAM SURFACES, ON EACH SIDE OF SAID SHANK, FORMED BY SAID THICKER PORTION AND ENGAGING THE UNDER SIDE OF SAID PLATE ON EITHER SIDE OF SAID SLOT TO STOP THE KEY, AND A PIVOT PIN EXTENDING THROUGH SAID THICKENED PORTION FOR PIVOTING THE KEY IN THE FRAME, EACH SIDE OF SAID TRIANGULAR SECTION LYING PARALLEL TO THE ADJACENT END OF THE SLOT WHEN THE KEY IS MOVED IN EITHER DIRECTION TO OPERATE ONE OF THE SETS OF SWITCH SPRINGS.
Claim 2
Dependent Claim
241 words
IN A LEVER KEY SWITCH, AN ESCUTCHEON PLATE HAVING A SLOT THEREIN WITH VERTICAL ENDS, A FRAMEWORK SECURED TO AND DEPENDING FROM SAID PLATE WITH SWITCHING SPRINGS SECURED THERETO, A LEVER KEY PIVOTALLY MOUNTED IN SAID FRAME WITH ITS UPPER PORTION EXTENDING UPWARD THROUGH THE SLOT IN SAID ESCUTCHEON PLATE AND HAVING PROJECTIONS ON ITS LOWER PORTION FOR OPERATING THE SPRINGS WHEN THE KEY IS MOVED ABOUT ITS PIVOT, SAID KEY INTEGRALLY MOLDED IN ONE PIECE WITH ONE PORTION COMPRISING A THIN FLAT TAPERED SHANK EXTENDING UPWARD FROM ITS PIVOT POINT IN THE SHAPE OF A TRIANGLE WITH A THREADED PORTION EXTENDING UPWARD FROM THE UPPER APEX OF THE TRIANGULAR SHAPED PORTION TO WHICH A HANDLE MAY BE ATTACHED, THE LOWER PORTION OF THE KEY AT THE BASE OF THE TRIANGULAR SHAPED SHANK FORMED OF GREATER THICKNESS THAN SAID SHANK PORTION WITH A LARGE CAM SURFACE ON THE LOWER SIDE THEREOF ENGAGING THE SPRINGS WHEN THE KEY IS OPERATED AND WITH UPPER CAM SURFACES, ON EACH SIDE OF SAID SHANK, FORMED BY SAID THICKER PORTION AND ENGAGING THE UNDER SIDE OF SAID PLATE ON EITHER SIDE OF SAID SLOT TO STOP THE KEY, AND A PIVOT PIN EXTENDING THROUGH SAID THICKENED PORTION FOR PIVOTING THE KEY IN THE FRAME, EACH SIDE OF SAID TRIANGULAR SECTION LYING PARALLEL TO THE ADJACENT END OF THE SLOT WHEN THE KEY IS MOVED IN EITHER DIRECTION TO OPERATE ONE OF THE SETS OF SWITCH SPRINGS.
References Cited (Backward Citations)
US1060576A
Cited
US1551722A
Cited
US1784898A
Cited
US1778529A
Cited
US2290453A
Cited
US2727103A
Cited
US2763737A
Cited
US2943158A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-10 | 1968-05-11 | 1968-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-10 | 1972-05-11 | 1972-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-10 | 1976-05-11 | 1976-11-10 | $7700.00 | Window Closed / Lapsed |