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1971 Viking Corp Model D3 Water Motor Alarm

1971 Viking Corp Model D3 Water Motor Alarm

Built by the Viking Corp. of Hastings, Michigan, a water motor alarm like this both actuated and powered by the water in a wet sprinkler system. When water flows past the automatic sprinkler's check valve, it will then pass through this water motor alarm before flowing to the sprinklers. The water flowing through the system causes a rotating striker to hit the gong, producing the alarm sound.

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Plus icon EXIF data

X-Resolution72 dpi
Y-Resolution72 dpi
Exposure0.167 sec (1/6)
Aperturef/4.0
Exposure Bias0 EV
Focal Length92 mm
Focal Plane X-Resolution3849.211789 dpi
Focal Plane Y-Resolution3908.141962 dpi
Sensor Width5792 (168-5783 used)
Sensor Height3804 (56-3799 used)