Computer-controlled password lock

Details Computer-controlled password lock Computer-controlled password lock

1987-05-26

1989-03-14

Caldwell, Sr., John W.

Communications: electrical

Continuously variable indicating

With meter reading

340543, 70278, H04Q 900

Patent

active

048128414

ABSTRACT:
A computer-controlled password lock system having a user operated keyboard to key in and reset a password. An indicator visually displays at least one code symbol varying with time. A memory device stores a current password including at least two code symbols so that upon entry of a keyed-in password code through the keyboard, one of the stored password code symbols of the current password is replaced by the time varying code symbol and password then compared with the keyed-in password code to generate a lock opening signal when coincidence occurs. In response to non-coincidence, an alerting signal is generated to indicate the incorrect password condition.

REFERENCES:
patent: 3953769 (1976-04-01), Sopko
patent: 4333090 (1982-06-01), Hirsch
patent: 4502048 (1985-02-01), Rehm
patent: 4604708 (1986-08-01), Lewis

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