Roller Bearing Hot Box Sensor.
DEPARTMENT OF THE NAVY WASHINGTON DC
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A roller bearing hot box sensor utilizing a metallic temperature sensitive elongated wire element. The wire element contacts at temperatures in the range of about 125 F to about 225 F so that when the contraction movement of the wire is attached to a connector means that operates a firing pin. Movement of the wire element initiates an electrical battery or other power source and thereby transmits electrical current to a signaling device, that gives a signal. Author
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