Showcase alarm system

Details Showcase alarm system Showcase alarm system

1991-03-07

1992-08-11

Ng, Jin F.

Communications: electrical

Condition responsive indicating system

Specific condition

340529, 34030915, 70267, G08B 1308

Patent

active

051382997

ABSTRACT:
An alarm system for use in store showcases. The alarm system includes a door switch, a timer, a user actuable shunt switch, a lock switch and door alarm logic. Prior to opening a showcase door, the shunt switch is actuated causing the time to produce a signal which disables the door alarm logic for a first predetermined time period. The sales person then has a first predetermined time period to enter the showcase, remove the desired merchandise, and close the showcase. Failure to close the showcase door in time, or opening the showcase door without actuating the shunt switch, causes the door alarm logic to activate, and the salesperson is notified of the open door. The lock switch can be actuated to disable the alarm logic for a second time period.

REFERENCES:
patent: 3686660 (1972-08-01), Massover
patent: 3757319 (1973-09-01), Hedin
patent: 3803576 (1974-04-01), Dobrzanski
patent: 4920333 (1990-04-01), Barr

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