Alarm system for a card holder

Details Alarm system for a card holder Alarm system for a card holder

1998-01-10

1999-04-06

Hofsass, Jeffrey A.

Communications: electrical

Condition responsive indicating system

Specific condition

3405681, 3405687, G08B 1314

Patent

active

058924442

ABSTRACT:
A flexible resilient ribbon having first and second conductive surfaces is wrapped over the top edge of a pocket wall forming a bowed-out first conductive surface adjacent to the top edge of the wall which biases the first conductive surface into contact with the second conductive surface when a card is absent from the pocket, an alarm circuit IC terminal is connected by a network which includes a fixed resistor to power supply negative and the first and second conductive surfaces each of carbon, in series removable contact, connected to power supply positive.

REFERENCES:
patent: 3959789 (1976-05-01), McGahee
patent: 4721948 (1988-01-01), Lin
patent: 4890094 (1989-12-01), Kopel
patent: 5034724 (1991-07-01), Tone
patent: 5373283 (1994-12-01), Maharshak
patent: 5739744 (1998-04-01), Roca et al.

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