Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1987-03-26
1988-01-26
Rowland, James L.
Communications: electrical
Condition responsive indicating system
Specific condition
G08B 700, G08B 2100
Patent
active
047219483
ABSTRACT:
A wallet includes a pair of leaves foldable upon each other having two longitudinal metallic strips adhered on a magnet strip formed on a right leaf of the two leaves, a plurality of card bags adapted for inserting credit cards, lift cards, etc. therein each bag having a lower opening, a metallic foil chip backed with a ferrous chip corresponding to the lower opening to be operatively contacted with two matallic strips formed on the right leaf adapted to complete an alarm circuit, and an alarm circuit having a light-emitting diode (LED), a sensitive photoresistor and a inert photoresistor subject to light exposure from the LED when closing the two leaves, whereby if any card is not inserted in the bag, the foil chip will be magnetically driven to contact the two metallic strips to close the alarm circuit and light LED to thereby increase a positive voltage through the inert photoresistor to start the sounding IC to remind the wallet owner for his or her possible missing of a card.
REFERENCES:
patent: 3959789 (1976-05-01), McGahee
patent: 4480250 (1984-10-01), McNooly
patent: 4652865 (1987-03-01), Maharshak
Rowland James L.
Wong Tat K.
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