Money clip with light sensitive detector

Details Money clip with light sensitive detector Money clip with light sensitive detector

1978-08-23

1980-01-08

Waring, Alvin H.

Communications: electrical

Condition responsive indicating system

With particular coupling link

325119, 340568, 340555, G08B 1318

Patent

active

041830199

ABSTRACT:
The invention relates to an electronic detection and transmission system known in the art as a money clip. Presently available such money clips are pressure sensitive and transmit initiating signals on detection of a decrease in pressure. Such systems have disadvantages, and the present system overcomes certain of the disadvantages by providing a system wherein detection is accomplished by a light sensitive means such as a phototransistor. In accordance with the invention, the electronic circuitry is contained in a housing having a top surface. The phototransistor is disposed below an opening in the top surface, which is preferably centered on the top surface. When the opening is uncovered, light will enter the opening and fall on the phototransistor to activate the phototransistor. The phototransistor is connected in circuit with a transmitter which will similarly be activated to transmit an initiating signal.

REFERENCES:
patent: 3300770 (1967-01-01), Brousseau et al.
patent: 3467771 (1969-09-01), Polack
patent: 3618060 (1971-11-01), Nina
patent: 3638213 (1972-01-01), Dagle

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