Non-reversing load detector for a reciprocating element

Details Non-reversing load detector for a reciprocating element Non-reversing load detector for a reciprocating element

1990-05-21

1991-07-02

Levy, Stuart S.

Measuring and testing

Blower, pump, and hydraulic equipment

7386268, 7386267, G01M 1900, G01L 122

Patent

active

050276514

ABSTRACT:
The detector has a pair of matched strain gauges bonded to a piston rod, one gauge being fixed parallel with the axis of reciprocation and one fixed transverse thereto. The former gauge is the active one, and the other is a dummy. Circuitry is coupled to the gauges to sense the disparity in resistances thereof, and further transistor circuitry is provided to establish compressive and tensile thresholds of the pistion rod. If given thresholds are not reached, or manifest non-sinusoidal excursions, detector circuitry signals a non-reversing load condition.

REFERENCES:
patent: 2498881 (1950-02-01), Eldridge, Jr.
patent: 3272006 (1966-09-01), Eckard
patent: 3899924 (1975-08-01), Klein
patent: 4805451 (1989-02-01), Leon
patent: 4879901 (1989-11-01), Leon
patent: 4882937 (1989-11-01), Leon

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