Piston overtravel indicator

Details Piston overtravel indicator Piston overtravel indicator

G - Physics

01

B

340/135

G01B 7/14 (2006.01) F15B 15/28 (2006.01)

Patent

CA 1101960

PISTON OVERTRAVEL INDICATOR Abstract of the Disclosure An overtravel indicator for a piston received in a cylinder having an end wall toward which the piston moves includes an elongated indicator rod slidably mounted through a dielectric bushing in the end wall. A conductive garter spring is compressed between the indicator rod and a groove in the cylinder end wall. An electric circuit including an electrically operated indicator is connected for completion through the indicator rod, end wall and garter spring. In an inward armed position of the indicator rod, dielectric material carried by the rod is interposed between the rod and garter spring for opening the electric circuit. In an outward operated position of the rod, a conductive surface on the rod engages the garter spring to complete the circuit and operate the indicator.

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