专利名称：KEY-OPERATED LOCKING DEVICE发明人：JEAVONS, Philip, Swingewood申请号：EP84902460.0申请日：19840612公开号：EP0145764A1公开日：19850626
摘要： Locking device, in particular for motor vehicle door locks electrically actuatedand the like, using a key (10) having a blade opaque to light (11) provided with at leasttwo series of apertures opaque to light (12 , 13), for example along its opposite edges,the position of these holes forming a key code. The device incorporates light-emitting(31) and photoreceptor (32) positioned to read the openings of each series andproducing signals corresponding to the code when the key is removed from a slot (24)after insertion, operating a switch (38) which energizes the transmitter. A logic circuitproduces an unlocking signal only in response to a key having the correct coding.
申请人：WILMOT BREEDEN LIMITED
地址：Fordhouse Lane Stirchley Birmingham B30 3BW GB
国籍：GB
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