Recording lock system

Details Recording lock system Recording lock system

1984-04-30

1986-05-27

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

70362, 70433, 361172, H04Q 900, E05B 4900

Patent

active

045918520

ABSTRACT:
An automatic system for identifying an authorized key utilized to lock and unlock a door lock and to record pertinent data attendant thereto is disclosed herein having a key sensing mechanism incorporated into a lock that operates a switch circuit to generate a key identification signal. A control circuit receives the signal as well as time and date information and introduces this data to a printer for producing a visual record of the door lock transaction. The authorized key is coded not only to lock and unlock the door lock but includes a plurality of identification number codes along a given length.

REFERENCES:
patent: 3825898 (1974-07-01), Miller
patent: 3854120 (1974-12-01), Matto et al.
patent: 4257030 (1981-03-01), Bruhin et al.

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