Method and apparatus for detecting mechanical overload of a hois

Details Method and apparatus for detecting mechanical overload of a hois Method and apparatus for detecting mechanical overload of a hois

1989-01-31

1990-08-28

Shoop, Jr., William M.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

361 87, 318465, 318476, H02H 708

Patent

active

049530534

ABSTRACT:
A hoist for raising and lowering objects with an apparatus for detecting mechanical overload of the hoist. The system provides a hoist having an alternating current motor connected to an alternating current power supply. The level of current of the power supplied to the motor is compared to a level of power indicative of a mechanical overload condition. If the current signal representative of the actual motor current level equals or exceeds the mechanical overload reference current then an overload output signal is provided.

REFERENCES:
patent: 3912976 (1975-10-01), Sons et al.
patent: 4286303 (1981-08-01), Gernheimer et al.
patent: 4288828 (1981-09-01), Kuntner et al.
patent: 4291355 (1981-09-01), Dinger
patent: 4306265 (1981-12-01), Kuntner et al.
patent: 4363061 (1982-12-01), Vaerewyck et al.
patent: 4481553 (1984-11-01), Owen et al.
patent: 4623967 (1986-11-01), Naimer
patent: 4763220 (1988-08-01), Belbel et al.
patent: 4827369 (1989-05-01), Saletta et al.

Affiliated with

Also associated with

Rating

Method and apparatus for detecting mechanical overload of a hois does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for detecting mechanical overload of a hois, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for detecting mechanical overload of a hois will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1593835