Hoisting apparatus

Details Hoisting apparatus Hoisting apparatus

1978-06-19

1980-09-09

Truhe, J. V.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

318289, 318293, 318447, 318470, 318473, 318480, 318484, H02P 122, H02P 140

Patent

active

042219965

ABSTRACT:
A hoisting apparatus and a control circuit therefor comprising a reversible electric motor drivingly connected to a hoisting drum for hauling an object up and down. The control circuit includes first and second photosensitive elements each responsive to a light beam for initiating rotation of the electric motor in either direction and means for terminating rotation of the electric motor.

REFERENCES:
patent: 2902276 (1959-09-01), Purdy
patent: 2922929 (1960-01-01), Cooper et al.
patent: 2962647 (1960-11-01), Borenstein
patent: 3144598 (1964-08-01), Merritt
patent: 3147001 (1964-09-01), Purdy
patent: 3294151 (1966-12-01), Hartley et al.
patent: 4081729 (1978-03-01), Payne et al.

Affiliated with

Also associated with

Rating

Hoisting apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hoisting apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hoisting apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2226192