Electricity: circuit makers and breakers – Retarded – Clock train
Patent
1989-05-15
1989-12-26
Scott, J. R.
Electricity: circuit makers and breakers
Retarded
Clock train
74568R, 200 38BA, 200 38CA, 200574, H01H 1962, H01H 342, F16H 5300
Patent
active
048899640
ABSTRACT:
The rotating cam limit switch includes a hub, a position screw arm, a position screw, a position wheel, a retractable cam, a dwell wheel, a dwell screw, a dwell screw arm, a spring wave washer and a locking ring. The hub is to be mounted on a rotating shaft which is to activate a non-rotating switch assembly. Near a first axial end, an integral position screw arm and position flange extend radially from the integral hub. The position screw arm carries a position screw, which is snap fitted onto the arm, which operatively engages the position wheel rotatably mounted on the hub next to the position screw arm. The dwell wheel is also rotatably mounted with respect to the hub. The dwell wheel is operatively engaged by the dwell screw carried by the dwell screw arm integrally formed with a dwell flange. The dwell screw arm is fixed to the hub by hub a anti-rotation device. The wave washer and the locking ring, mounted near a second axial end of the hub, compress the rotating components together. A cam chamber defined by the position and dwell wheels receives a retracted portion of the flexible elongate retractable cam. The dwell wheel operatively engages the cam to vary the length of the exposed surface of the cam. The exposed surface of the cam activates the switch of the switch assembly. Differing indicia of degree position and dwell are marked about the circumference of the position and dwell wheels.
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Automatic Timing and Controls Co., "Rotating Cam Limit Switch (Prior Art)"; 3 pages, KIP; 5/13/88.
McGraw-Edison, Gemco Catalog, Sec. 1980 (pp. 1-40) and Sec. 1981 (pp. 1-20); 6/83.
Automatic Timing & Controls Co. Catalog (pp. face, 45-50, 95-100, 105, end) 7/79.
Loeck Steven M.
Pea Kevin I.
Tenniswood David M.
Gleason Reel Corp.
Scott J. R.
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