will, Billl it's nice to hear you, my father help in the making of the old adaptahorn (fire horn) and the 1300 serie of Edwards back in the day when they were in Norwalk, Conn.that model of adaptahorn were remodel in the early 50's and went on well over 50/60 years and saved many of lifes, schools, military personal etc and even the first bell ringed in the stock exchange were an Edwards. this company is the father of alarm system, and all other follow suit.. the father of the 4-4-4-4 code.
will, Billl it's nice to hear you, my father help in the making of the old adaptahorn (fire horn) and the 1300 serie of Edwards back in the day when they were in Norwalk, Conn.that model of adaptahorn were remodel in the early 50's and went on well over 50/60 years and saved many of lifes, schools, military personal etc and even the first bell ringed in the stock exchange were an Edwards. this company is the father of alarm system, and all other follow suit.. the father of the 4-4-4-4 code.
The code reminds me of those old fire alarm boxes.
Any AC horn of this vintage will sound a 60 Hz. tone.
The Adaptahorn, did they have all different pitches or just one pitch?
Goldenrod636 all