ENGINE FIRE SHUT-OFF SWITCH
Challenge: Design a multi-function switch module, which when activated will shut off fuel supply to a specific aircraft engine and activate the fire extinguishing system. This module must incorporate numerous safety features to avoid accidental activation.
Solution:
The result is a combination of Janco's proven rotary switching mechanisms
in a rugged, plug-in module assembly. The fuel flow to the engine is shut
off by pulling the shaft to the "out" position actuating a 10
pole snap action "A" Series Rotary Switch. A solenoid operated
safety mechanism must be energized or the manual override button pushed
before the shaft can be activated. The fire extinguishing material is then
released by rotating the shaft and actuating a 2 pole momentary "C"
Series Rotary Switch. The switch handle incorporates a hidden legend which
is only legible when the 4 incandescent handle lamps are illuminated.
