Patent US2500688A successfully refreshed from Google Patents.
US3588397A
Expired / Lapsed
US
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Combination card unlock mechanism
Assignee: Casi Rusco Inc
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Filing: 1969-11-17
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Granted: 1971-06-28
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Expires: 1989-11-17
Abstract
Abstract A CARD ACTUATED SWITCH WHEREIN A MOVABLE PLATE IS PROVIDED WITH A LOCKING PIN BORE AND CONTROL PIN BORES, WHICH, WHEN A CARD IS INSERTED HAVING THE RIGHT COMBINATION OF PROJECTIONS ON IT, IS MOVED AGAINST A SWITCH ARMATURE. IN A SET OF CARDS ALL OF WHICH ARE PROVIDED WITH A PROJECTION FOR RELEASING THE SINGLE LOCKING PIN, SOME ARE PROVIDED WITH A PROJECTION AT THE LOCATION OF ONE CONTROL PIN AND SOME WITH A PROJECTION AT THE LOCATION OF ANOTHER CONTROL PIN, SO THAT A CONTROL KNOB FOR ONE OR ANOTHER OF THE CONTROL PINS CAN BE SET IN ONE POSITION TO BLOCK MOVEMENT OF THE MOVABLE PLATE AND IN ANOTHER POSITION TO PERMIT MOVEMENT OF THE MOVABLE PLATE.
Inventors
- 👤 Clarence L Ellefson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:01
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/04; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7441; Y10T70/7757
Claims Analysis
Total Claims: 0
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References 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) | 1974-06-27 | 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 |