(57) Card controlling device for locking, alarm and similar units comprising a supporting
block effective to be inserted into a box-like portion of a frame and a reciprocating
drawer member, effective to reciprocate along a sliding seat as formed in the block.
The movable drawer member is provided with a central slot effective to receive a key
card for opening a snap device. From opposite sides with respect to the central slot,
the movable drawer member and supporting block include a plurality of coaxially extending
holes some thereof resiliently house a pin and a counterpin. As the key card is introduced
into the slot, the pins and counterpins are located in such a way that the adjacent
surfaces thereof are coplanarily located with respect to the sliding surfaces of the
movable drawer member, thereby releasing this latter and allowing for it to slide
in the block.
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