Locks – Special application – For control and machine elements
Patent
1984-01-25
1986-04-15
Wolfe, Robert L.
Locks
Special application
For control and machine elements
70252, B60R 2502
Patent
active
045819092
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a national phase application corresponding to PCT/EP83/00143, filed 21 May 1983 and based upon German applications of 27 May 1982 and 18 Nov. 1982 under the International Convention.
FIELD OF THE INVENTION
The invention relates to a cylinder lock, particularly a steering-wheel lock for a motor vehicle in which a locking bolt is adapted to be operated by a cylinder core and to be moved by an eccentric into a non-locking position and to be held there by a locking disc which is disposed at a right angle to the axis of the lock and which can be released only by the withdrawal of the key.
BACKGROUND OF THE INVENTION
A lock of this kind is known from German Pat. No. 12 93 049. In this lock, the locking bolt is moved into the unlocked position by an eccentric fastened on the cylinder core, and then is held by a locking disc which is articulated about an axis offset parallel to the axis of the cylinder and is secured against pivoting by the tip of the key. After the key has been slightly withdrawn, the locking disc yields rockingly, so that the locking bolt can assume its locking position. This lock therefore locks after the key has been slightly withdrawn and, because of its construction, it has large dimensions. Moreover, it is easily manipulated from the outside, because the plate can be tilted by an object inserted through the key channel, so that the interior of the lock can be reached. Tiltability of the locking disc is necessary because the disc must yield rockingly to the tip of the key if the cutout provided in the plate for the tip of the key does not lie on the same level as the key channel.
A similar locking disc is also known from German patent document (Auslegeschrift) No. 20 59 215. This known locking disc also yields rotatingly to the locking bolt and is controlled by a two-armed lever guided parallel to the cylinder core, to which lever the locking disc yields tiltingly so that the lever can engage in the edge of the locking disc. In both known locks the tilting movement of the locking disc is necessary only to enable the member controlling or holding the disc to engage in the latter. Both known arrangements are expensive to construct and, in addition to a rotary movement, require a complicated tilting movement which is difficult to control. In addition, in the open position they do not hold the locking bolt sufficiently securely against the pressure of a spring loading the locking bolt, since the locking disc must be mounted for rotation in two directions. Moreover, this locking disc cannot operate more than one locking bolt.
OBJECTS OF THE INVENTION
The object of the invention is to provide an improved cylinder lock of the kind first mentioned above in such a manner that, while it is highly reliable in operation and releases only after the key has been completely withdrawn, it is of simple design, small in size and its locking disc is very resistant in opposing the pressure of the locking bolt. In addition, it is an object of the invention to provide a lock of the type mentioned above in which the locking disc can control more than one locking member.
SUMMARY OF THE INVENTION
According to the invention, these problems are solved in that the locking disc is movable in the direction of the axis of the lock and lies, in a first axial position, outside the range of movement of the locking member or of the transmission member and, in a second axial position, within this range of movement.
A locking disc of this kind, which is axially movable on a projection of the cylinder core, that is to say displaceable parallel to itself, and which is at right angles to the axis of the lock, can be mounted very securely and need only make a sliding movement in relation to the cylinder core. On the other hand, this disc does not need to turn relative to the cylinder core, but is turned by the latter. The "ready-to-lock position" of the locking or transmission member or members is not cancelled by a tilting or turning of the locking disc, but
REFERENCES:
patent: 3686906 (1972-08-01), Watkins
patent: 3724244 (1973-04-01), Schaumburg
patent: 4266414 (1981-05-01), Eichemauer
Dubno Herbert
Neiman S.A.
Ross Karl F.
Wolfe Robert L.
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