Electric Fire Alarm Signal
The Denver siren, motor-driven, for the sounding of fire and any other alarms, has recently been placed on the market by the Hendrie & Bolthoff Mfg. & Supply Company, of Denver, Colo., who have been designers and builders of machinery since 1861. This siren has a distinctive and penetrating sound which cannot be mistaken for a factory or any other whistle. The revolving part of the siren, or rotor, as it is called, is made of aluminum, and the outside of cast iron. The motor and coupling are covered by a close-fitting hood. The siren is made in three sizes, operated by motors of from two to five horsepower. The smallest size weighs 300 pounds complete. Following is a letter received by the manufacturers from Chief R. P. Kepler, of Toledo, Ia., one of the users of the Denver siren: “About three weeks ago the City Council of Toledo placed one of your Siren Fire Alarms on trial in the tower of the City Hail. Under the direction of the Fire Department the Siren was given a day’s trial, notice of which was given in the city papers, and a short time later a night test was made no notice of which was given. Both tests proved satisfactory, the one at night given at about the hour of 2 o’clock being especially gratifying. The peculiar sound made by the Siren is very piercing and can be heard for a long distance; in fact, I have been informed by persons living five and six miles out from the city that the alarm was plainly heard. The fire department (volunteer) is loud in praise of the efficiency of the Siren, and the City Council, after the tests were made, immediately ordered its purchase and permanent installation. My opinion of its particular efficiency lies in the fact that its alarm is instantaneous. As we have it installed here a line of electric wires runs to the Central office of the Telephone Company, and when a fire is reported to the telephone office, the operator there immediately turns in the Siren alarm and then communicates the location of the fire by telephone to the fire station. I can most heartily endorse the Siren and believe it will meet our every requirement.” The Woodhouse Mfg. Co., of New York, are sales agents for the Denver Siren.