Protective electrical system for providing indications of remova

Details Protective electrical system for providing indications of remova Protective electrical system for providing indications of remova

1979-11-02

1981-05-19

Waring, Alvin H.

Communications: electrical

Condition responsive indicating system

Specific condition

340555, 340568, 340574, G08B 1318

Patent

active

042688230

ABSTRACT:
A photocell is placed beneath a packet of real or simulated currency at each of a plurality of teller locations in a bank. The photocells at the several teller locations are connected in a parallel circuit with each other, and a voltage supply source is connected to the parallel circuit through a common current-sensing resistance, so that if currency is removed from any teller location this will be indicated by a voltage drop across the common current-sensing resistance. The common current-sensing resistance is located in a control box at a remote location within the bank, and used to control even more remote alarm equipment, at a police station for example. In order to provide a ready indication of the teller location at which currency removal has occurred, each branch circuit at each teller location is provided with its own current-sensing series resistor, and a separate conductor is run from each such series resistor to the control box in the bank, wherein identifiable lamps corresponding to each teller location are provided. A manually-operable test switch, when operated, replaces the remote alarm equipment with a lamp at the control box, so that the system can be tested without sounding an alarm. A simple but effective line-monitoring circuit is also employed.

REFERENCES:
patent: 3638213 (1972-01-01), Dagle
patent: 3710372 (1973-01-01), Anderson et al.
patent: 4101876 (1978-07-01), Lurkis et al.

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