Bridge crane control unit

Details Bridge crane control unit Bridge crane control unit

1985-12-27

1987-01-13

Barefoot, Galen L.

Traversing hoists

With haul-in line

414 1, 414 7, 901 12, 74471R, 74471XY, B66C 1340

Patent

active

046358021

ABSTRACT:
A one-hand-operable control unit for a bridge crane. A cam, rotated by pointing a control handle in the direction toward which it is desired for the bridge crane hoist to be moved, operates switches which connect power to the appropriate motors of the bridge crane to move the hoist longitudinally, laterally, or diagonally when a thumb-operated traverse power control switch, located on the control unit handle, is closed. Switches are conveniently located on the front of the control handle to control load-raising and lowering operation of the hoist motor. A flexible hollow shaft connecting the control handle with the cam rotates the direction-controlling cam in response to pointing the handle toward the direction of traverse movement desired.

REFERENCES:
patent: 3018750 (1962-01-01), Hill
patent: 3073347 (1963-01-01), Bent et al.
patent: 3589242 (1971-06-01), Peterson
patent: 3707093 (1972-12-01), Worden

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