Credit card monitor

Details Credit card monitor Credit card monitor

1975-02-21

1976-05-25

Pitts, Harold

Communications: electrical

Systems

Call station

340282, 3403094, 340371, G08B 700

Patent

active

039597890

ABSTRACT:
A check or credit card monitor consisting of a plurality of normally closed switches adapted to be held open by insertion of credit cards or similar items between the switch contacts. The contacts are connected in parallel to a timing means adapted to energize a sensory alarm such as an audio signal, vibrator or light a predetermined time after closure of any one of said plurality of switches.

REFERENCES:
patent: 1546509 (1925-07-01), Poole
patent: 1685329 (1928-09-01), Lynch
patent: 3855588 (1974-12-01), Buckland

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