Two-Way Firemen’s Radio Is Carried on the Back (Dec, 1940)
Two-Way Firemen’s Radio Is Carried on the Back
AS A result of months of research work by two New York firemen, Samuel Harmatuk and Arthur Meyerson, smoke eaters in America’s largest city soon will be directed in fire fighting and life saving by means of lightweight, back-pack radios. Weighing only fifteen pounds, the two-way units can be slipped on over heavy fire-fighting clothing, leaving the hands free for climbing. A flexible cable controls the switch which shifts the set from transmitting to receiving and back again. The microphone is located on one of the shoulder straps of the harness and the earphones, of soft rubber, can be worn under a helmet. Telescoping antennas are located on either side of the waterproof case which houses the set. Power for the unit is supplied by dry-cell batteries with a life of seventy hours. The specially designed condensers are not affected by heat. During tests recently conducted by the New York Fire Department, the sets proved they had a range of as much as a mile. In use, they will enable a fire chief to talk to smoke eaters at work inside a burning building.