Locks – Operating mechanism – Key
Patent
1988-03-09
1990-07-17
Wolfe, Robert L.
Locks
Operating mechanism
Key
70366, E05B 2902
Patent
active
049413368
ABSTRACT:
A lock mechanism is disclosed in which a hollow cylindrical housing is provided with at least one interior longitudinal slot. A cylinder having a longitudinal keyway is inserted into the housing and an endpiece having at least one radial groove and one circumferential groove is attached to the housing. At least one tumbler is pivotably mounted within the cylinder on an axis transverse to the cylinder. The tumbler has a locking edge sized and positioned to extend into the longitudinal groove in the housing when the tumbler is in a locked position and to be within the cylinder when the tumbler is in an unlocked position. The tumbler also has a tab sized and positioned so as to fit within the radial groove of the endpiece when the tumbler is in a locked position, and to align with and be capable of traveling through the circumferential groove of the endpiece when the tumbler is in an unlocked position. A keying edge is provided on the tumbler which has a given slope relative to a center line through the keyway and which extends into the keyway. The tumbler is spring biased to a locked position. It is moved to an unlocked position by the insertion of a key having a surface which is oriented and sloped to engage the keying edge of the tumbler and rotate the tumbler to an unlocked position.
REFERENCES:
patent: 1896523 (1933-02-01), Main
patent: 3404548 (1968-10-01), Keefer
patent: 4073171 (1978-02-01), Moorhouse
patent: 4196606 (1980-04-01), Guiraud
Dino Suzanne L.
Wolfe Robert L.
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