Locks – Attack-actuated defeating mechanisms
Patent
1975-06-06
1976-04-06
Wolfe, Robert L.
Locks
Attack-actuated defeating mechanisms
70366, 70377, E05B 6300
Patent
active
039480658
ABSTRACT:
A cylinder lock comprising an outer cylinder enclosing a hollow rotatable inner cylinder which, in turn, encloses a plurality of locking discs turnable with the key of the lock. Between the outer cylinder and the peripheral edges of the locking discs there is a locking bar locking the inner cylinder to the outer cylinder. This bar is movable from a position locking the inner cylinder, in which position the bar is located partly in a groove in the inner wall of the outer cylinder to a position releasing the inner cylinder. In the latter position the locking bar is received in a channel formed jointly by locking bar notches in the peripheral edges of the locking discs when the discs are brought to a certain position. The groove in the inner wall of the outer cylinder is provided with a lateral step, so that a deep groove portion and a shallow groove portion are formed. The different locking discs are provided, in addition to the locking bar notch, with a number of shallow notches, so dimensioned, that upon forming jointly by said shallow notches a channel at the position of the locking bar, the locking bar is able to move into the shallow groove portion and remains locked between the bottom of the shallow groove portion and the bottom of the shallow notches.
REFERENCES:
patent: 2613528 (1952-10-01), Salmivuori
patent: 3313134 (1967-04-01), Gahmberg
patent: 3789638 (1974-02-01), Roberts
Oy Wartsila Ab
Wolfe Robert L.
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