Card-controlled lock installations including matrix circuits

Details Card-controlled lock installations including matrix circuits Card-controlled lock installations including matrix circuits

1974-12-27

1976-08-24

Pitts, Harold

Communications: electrical

Digital comparator systems

340274C, 340166R, H04G 300

Patent

active

039769747

ABSTRACT:
A multiple-output electrical matrix system having a plurality of outputs one of which can be selected in accordance with selection of a given combination of inputs, while utilizing only a small amount of power. This matrix system is suitable for use in a safe-deposit box installation where a decoder sends information to the matrix system for actuating the latter to unlock, at least partially, a given safe-deposit box. The decoder receives its information from a card-reader capable of reading information, in code form, on an ID card which has not only a code for identifying a given box but also a code for providing a condition which must be met before a given box can be unlocked. A control circuit is connected between the card-reader and the decoder for transmitting an unlock signal to the latter only when the control circuit detects that the conditional code has the requirement thereof fulfilled. The control circuit is also electrically connected with a time-stamp unit which permits the control circuit to transmit the unlock signal to the decoder only when a time card has an entrance time stamped thereon, this time card also having a portion on which a leaving time is adapted to be stamped.

REFERENCES:
patent: 3104314 (1963-09-01), Simjian

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