You'll flip when you see the control mechanism. It was working 23? years ago, then the guy that fixed it retired. The compony said, he learned from his father, and his father from his. It was a mash up up, telegraph, low voltage or old phone wires hook to a cog box that gave the signals to release the air and blow the whistle. The main compresser was in the basement, and a line ran to the tower. There was 2 holding tanks in the tower. It was something to see and here.I was not aware of those horns. My hometown had a motorized siren that sat atop a tall pole just outside the fire station. Two blasts of it meant a fire somewhere in town, three blasts meant it was out in the county. It gave the volunteers some idea of where things were happening. They also blew it at noon every Mon-Sat.