Watchmen's Time Detectors Operated by Batteries or Magneto Generators (1900)
Holtzer-Cabot Electric Company · Holtzer-Cabot Electric Company · leaf 15
inuous Ringing. |N all place- where a LOUD, SHARP sound for signalling is required, these Gongswill be found invaluable. They give a POWERFUL BLOW, and but little batterypower is REQUIRED for their operation. Municipal Fire Departments will find them the equal in every respect of the higher-priced… … Cut Illustrating Iron Case Gong,Cover Removed. READ CAREFULLY. In ordering, specify whether Single Stroke orContinuous Ringing Gong is desired, and whetherin Wood or Iron Case. If it is intended for closedcircuits where other gongs are already in opera-tion, state the resistance of the electro…
