New Signal System
Patents have been granted to Paul G. Brack, Sontervile. Mass , for a new type of signaling system.
With this arrangement, when a company responds to an alarm, a circuit is closed which operates visual signals in all stations on this hook up. It indicates to the others that that particular company is out, and that any call for that district must be answered by the others. When the company returns, the circuit is broken to indicate that the call boxes in the district will be serviced by the company.