E - Fixed Constructions – 05 – C
Patent
E - Fixed Constructions
05
C
268/2
E05C 19/02 (2006.01) D06F 37/42 (2006.01) E05B 47/00 (2006.01)
Patent
CA 1306472
ABSTRACT OF THE DISCLOSURE The invention concerns a device for a rapid locking and delayed unlocking of the door closing mechanisms of machines with internal parts which are subject to inertial rotation, in particular for the doors of washing machines, in which a sliding bar working together with the hook of the door-latch and associated with a pin which locks the aforesaid sliding bar under certain conditions, characterised by the fact that the locking-pin is actuated by the mobile contact plate of a microswitch, having also the function of a series switch, by means of a rocker arm moved by a bi-metallic strip suitably heated, electrically connected to the starting controls of the machine, an appropriate part of the mobile contact plate of the microswitch being, in its turn, subjected to the load of an eccentric ratchet, said load having the function, by increasing and decreasing, of correcting the insertion time and the delayed opening of the door-lock, the bi-metallic strip being heated by means of a heating resistor, and the bi-metallic strip, the heating resistor and the rocker arm simply resting on one another in order to guarantee, for these conditions, that the curving and straightening times of the bi-metallic strip remain stable through time. Since the dimensions and configuration of the sliding bar provided with an eyelet and the flange vary according to the type and make of machine, this invention has been designed so that the former can be inserted from outside with the door-locking device already mounted and closed, and the latter can be plugged into the door-lock itself. In addition, there is an optional device which can be applied which permits the machine to be started without the door being locked during particular stages of the cycle when the drum rotates slowly or during the drying cycle when machines are provided with this function.
556956
Marks & Clerk
Rocchitelli Onofrio
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