Inventors:
Robert F. Rauchut - Ivyland PA
Louis J. Caparoni - Audubon PA
Assignee:
ICI Americas Inc. - Wilmington DE
International Classification:
G08B 1318
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.