Universal lock for a positive safety door, in particular a landing entrance for elevator apparatuses
OwnerDominique Prudhommeinventor
Life of this patent
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Abstract
The lock is of the type comprising: a housing that can be fastened to the door frame of the landing entrance, a locking bolt for the landing entrance, a bolt-control lever, an exterior lever-operating arm actuated by a cam in the elevator car, an electrical contact indicating the presence of the elevator car, a door pull-away electrical contact, a cable bushing device, and a housing attachment. These components are adaptable to many types of elevators, either by being reversible and/or by adaptation of spare parts supplied and arranged in a stand-by configuration in a recess in the housing.
Claims37
A lock for positive safety door and double bolting arrangement for landing entrances for elevators of the type comprising:
- (a) a housing which can be attached to a door frame of a landing entrance;
- (b) a door-locking bolt adapted to slide in said housing and acted upon by a compression spring, said bolt cooperating with a stationary striking pin attached to a leaf of a swinging or sliding door acting on a safety mechanism associated with said bolt and capable of allowing total release of said bolt when all parameters relating to closing of said door are brought together;
- (c) a bolt-control lever linked to said bolt and actuated in a swinging motion around a pin, so as to cause translational motion of said bolt during opening and closing;
- (d) a lever-operating arm acting directly on its axis in a position facing said housing, or, by means of an angled retransmission system, into a position laterally of said housing, said lever-operating arm being mounted on the casing in such a way that it can be actuated in a frontal or lateral plane by a stationary or movable cam fastened to an elevator car;
- (e) an electrical bolt contact ensuring closing only when the bolt is completely released in the locking configuration, and permitting, in this position only, operation of the elevator;
- (f) secondarily, an electrical contact indicating the presence of the elevator car, which closes the entrance when the operating arm is completely pushed back by the stationary or movable cam attached to said car, and corresponding to an integral retraction of the bolt;
- (g) a pull-away electrical contact having a short-circuiting element attached to the leaf of the door, so as to allow operation of the elevator car cam only if said door is closed;
- (h) an electrical cable-bushing device for cables emanating from the different electrical contacts;
- (i) means for attaching the housing;
- (j) wherein at least one of the components of said lock comprises means capable of adapting it universally using a single housing.
Dependencies are inferred from the claim text.