Electrical transmission or interconnection systems – Switching systems – Condition responsive
Patent
1987-12-16
1991-07-23
Jennings, Derek S.
Electrical transmission or interconnection systems
Switching systems
Condition responsive
361 93, 307308, 269 32, 269233, 269329, H02H 308, H01H 3500
Patent
active
050346210
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. Lost motion abutment shoulders (70, 72) on the switch actuation member and power driven member (54) move into engagement with each other as a power driven member approaches each end of its stroke.
REFERENCES:
patent: 4162387 (1969-07-01), De Candia
patent: 4230023 (1980-10-01), Ward
patent: 4316145 (1982-02-01), Tann
patent: 4396183 (1983-08-01), Lymburner
patent: 4553040 (1985-11-01), Truper et al.
patent: 4583006 (1986-04-01), Okada et al.
patent: 4672500 (1987-06-01), Roger et al.
Groves John P.
Lazzaro Joseph
Nadolski Gregory L.
Van Zeeland Donald L.
Eaton Corporation
Jennings Derek S.
Lewis J. G.
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