Locks – Operating mechanism – Key
Patent
1976-07-12
1978-07-18
Dorner, Kenneth J.
Locks
Operating mechanism
Key
70398, E05B 2700, E05B 1912
Patent
active
041007778
ABSTRACT:
The disclosure relates to a key, which is dynamic, and a lock to be operated by the dynamic key. The key has a shaft with a key bit and a manual grip at opposite ends thereof. Mounted on the shaft is a bush spring loaded towards the key bit. A radial projection on the shaft engages a pair of mutually intersecting internal grooves in the bush, namely, one straight groove running parallel to the shaft axis and one annular groove encircling the shaft, so that when the bush is fixed the shaft can be constrained to move only parallel to its axis by engagement of the projection in the straight groove, and to move only rotationally about its axis by engagement of the projection in the annular groove. At its end facing the key bit the bush bears a number of pegs to be engaged in a corresponding number of holes in a fixed member of the lock. Located in and spring biased outwardly of these holes are two sets of pins. When the key is fully inserted in the lock, the pegs on the bush push the sets of pins back in the holes until the division between the two sets coincides with an interface surface between the fixed member of the lock and a rotor rotatably mounted thereto. The rotor also receives the key bit and can be turned by manual rotation of the key shaft which, when the key is thus fully inserted, is free to rotate in the bush, the radial projection being in this condition located in the annular groove and the bush being fixed by the engagement of the pegs in the holes in the fixed member of the lock.
REFERENCES:
patent: 1037543 (1912-09-01), Russell
patent: 1387442 (1921-08-01), Lee
patent: 3738136, Falk
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