Electricity: measuring and testing – Magnetic – Displacement
Patent
1987-12-16
1989-10-17
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Magnetic
Displacement
324226, G01B 714, G01R 3300, G01N 2772
Patent
active
048750093
ABSTRACT:
A proximity switch assembly (10) for signaling the location of a movable member (36) at either of opposite end limits of movement relative to a stationary frame (44,46) includes a compact elongate housing (58) adapted to be mounted on the frame to extend along the path of movement of a power driven member (32), such as the piston rod of a hydraulic cylinder, which shifts the movable member between its end limits. The proximity switch is fixedly mounted in the housing and carries a switch actuating member (68) mounted for sliding movement over a relatively short distance sufficient to move an actuating target (74) into and out of actuating proximity of an air core proximity sensing coil (120) within the housing. A circuit board holder (96) formed of dielectric plastic material nests within the housing to protect, electrically insulate and precisely position components (120, 100, 102) carried thereby.
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Eaton Corporation
Eisenzopf Reinhard J.
Lewis J. G.
Snow Walter E.
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