Hoist motor control system

Details Hoist motor control system Hoist motor control system

1977-12-27

1980-05-20

Truhe, J. V.

Electricity: motive power systems

Plural diverse motor controls

Motor-reversing

200 50C, H02K 1100

Patent

active

042041422

ABSTRACT:
An improved hoist control system wherein a D.C. motor is employed to drive the hoist, and a remote hand-held control is utilized to vary the motor speed and direction of rotation. The hand control comprises an A.C. to D.C. variable transformer which is controllable by a trigger mechanism, a three-pole double throw switch for up-off-down control of the motor, circuit on-off switches, a meter for reading the hoist load, and an interlock device for limiting the actuation of the motor control switch if the trigger is depressed.

REFERENCES:
patent: 2899619 (1959-08-01), Wiedemann
patent: 3248629 (1966-04-01), Reynolds
patent: 3422296 (1969-01-01), Frank
patent: 3469164 (1969-09-01), Truemper et al.
patent: 3703646 (1972-11-01), Jacyno
patent: 3755725 (1973-08-01), Cordes

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