Magnetic lock
Abstract
Abstract A HOUSING RETAINS A COUPLING CYLINDER, TO WHICH A BAIL OR LOCKING ELEMENT IS ATTACHED, AND A KEY CYLINDER, THE KEY CYLINDER BEING FREELY MOVABLE WITHIN THE COUPLING CYLINDER IN THE ABSENCE OF A KEY. THE KEY AND COUPLING CYLINDERS ARE FORMED WITH AT LEAST A PAIR OF MATCHING CHAMBERS RECEIVING MAGNETIC ELEMENTS, ONE OF THE CHAMBERS BEING LARGE ENOUGH TO WHOLLY ACCOMMODATE THE MAGNETIC ELEMENT SO THAT THE KEY CYLINDER MAY SPIN FREELY WHEN THE KEY IS ABSENT, OR OF THE WRONG COMBINATION. THE MAGNETIC PROPERTIES OF THE PROPER KEY CAUSE THE ELEMENTS TO MOVE FOR EXAMPLE BY REPULSION, INTO A POSITION SPANNING THE CHAMBERS OF KEY CYLINDER AND COUPLING CYLINDER TO COUPLE THE KEY THROUGH THE COUPLING CYLINDER TO THE LOCKING ELEMENT SO THAT OPERATING FORCES CAN BE TRANSMITTED FROM KEY TO LOCKING ELEMENT ONLY UPON PRESENCE OF THE PROPER KEY.
Inventors
- 👤 Hermann Hallmann
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |