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CLM Type 5263
CLM Type 5263
CLM Type 92729DP & 92730DP
CLM Type 92729DP & 92730DP
CLM Type 5-WRS Air Raid Siren Controller
CLM Type 5-WRS Air Raid Siren Controller
This is a Canadian Line Materials (CLM) siren controller at the Arnprior Fire Department in Ontario. It is attached to a single-phase Type 5261 siren. This controller's alert and all clear switches were removed and only the idle switch remains on the controller. The idle circuit spins the siren at 65-75 rpm depending on what the transformer taps are set to inside of the unit, this feature is used in the wintertime to run the siren quietly to keep the motor warm so it won't freeze. Near the bottom, there is an overload button in case the unit has an overload event. The ALERT and ALL CLEAR switches have been moved from the electrical room where the controller is mounted to the main area of the fire hall. The controller does not have any holding relays to keep the signal engaged because of that, it does not automatically cut off after a specific time like the early (1950s and later) Federal Sign & Signal AR/AF timers do. The switches keep the signal engaged and only turn off when someone turns the switch again. CLM's version of the "Attack/Take Cover" signal is 4 seconds ON and then 3.5 Seconds OFF.
This is a Canadian Line Materials (CLM) siren controller at the Arnprior Fire Department in Ontario. It is attached to a single-phase Type 5261 siren. This controller's alert and all clear switches were removed and only the idle switch remains on the controller. The idle circuit spins the siren at 65-75 rpm depending on what the transformer taps are set to inside of the unit, this feature is used in the wintertime to run the siren quietly to keep the motor warm so it won't freeze. Near the bottom, there is an overload button in case the unit has an overload event. The ALERT and ALL CLEAR switches have been moved from the electrical room where the controller is mounted to the main area of the fire hall. The controller does not have any holding relays to keep the signal engaged because of that, it does not automatically cut off after a specific time like the early (1950s and later) Federal Sign & Signal AR/AF timers do. The switches keep the signal engaged and only turn off when someone turns the switch again. CLM's version of the "Attack/Take Cover" signal is 4 seconds ON and then 3.5 Seconds OFF.
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