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Automotive Apparatus Friction Sirens
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| Model 8F Friction Siren |
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Produced from the 1910's through the 1930's, the 8F has an 8" stator diameter, and uses a friction roller made from a highly compressed cotton material. Typically seen on large fire apparatus, where one or more floor buttons with linkage would pivot the siren so the friction roller would drive from the exposed engine flywheel or crankshaft extension drive.
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| Model 6FA Siren |
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| Fan Drive |
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Produced from the 1920's into the 1950's, the 6FA has a 6" stator diameter, and also uses a friction roller made from highly compressed cotton material. They were available with an integral horn, or a plain inlet as shown. Often used on ambulances or police cars, they could be driven from a flywheel, a crankshaft extension drive, a special generator pulley, or as shown above, a custom engine cooling fan with an integral rim for the friction roller to drive from.
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| Model 6FA Siren |
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| Motorcycle Sirens |
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