G - Physics – 05 – G
Patent
G - Physics
05
G
G05G 1/08 (2006.01) B61C 17/12 (2006.01) B61H 13/02 (2006.01) G05G 9/047 (2006.01)
Patent
CA 2237012
A handle assembly of the type used in railway locomotives has been improved. The handle assembly includes a base plate, a cam mount attached to the base plate, a cam disk, and a shaft assembly interconnecting the mount and disk to allow rotation of the disk. The improvement includes a yoke, a bail bar, first and second bearing members anchored to the plate, and first and second switches attached to the plate. Pivotally connected to the disk and accommodating a handle, the yoke rotates along with the disk as the handle is moved along its range of motion and tilts as the handle is moved perpendicularly thereto. The bail bar is rotatable between the first and second bearing members. A first mechanism imparts a rotational force to the bail bar so that its middle section presses against an upper portion of the yoke. A stop limits rotation of the bail bar to a point at which the yoke and handle attain an untilted state. Operating against a lower portion of the yoke, a second mechanism provides a counterbalancing force to normally bias the yoke in the untilted state. No matter where the handle is positioned along its range of motion, when it is tilted by a preset amount, the yoke overcomes the rotational and counterbalancing forces so that a third mechanism causes both the first and second switches to change state.
Kettle Paul J. Jr.
Santoro Ralph Jr.
Macrae & Co.
Westinghouse Air Brake Company
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