Elevator overspeed protection apparatus

Details Elevator overspeed protection apparatus Elevator overspeed protection apparatus

1995-10-18

1997-05-13

Noland, Kenneth

Elevator, industrial lift truck, or stationary lift for vehicle

Having specific means contacting or on load support for...

Includes movable contact component on support for engaging...

188165, B66B 504

Patent

active

056283857

ABSTRACT:
An elevator overspeed protection apparatus includes a brake apparatus which makes use of eddy currents. The brake apparatus includes a magnetic spring placed on a car in the proximity of a pickup of the elevator overspeed protection apparatus such that, when an arm of the brake apparatus is in a horizontal condition, a displacement of the pickup is prevented with a strong attracting force by the magnetic spring, but when the arm is inclined obliquely, the attracting force of the magnetic spring is prevented from acting upon the pickup. Due to the construction, the brake apparatus operates stably and with certainty and has an increased life.

REFERENCES:
patent: 5301773 (1994-04-01), Jamieson et al.
patent: 5366044 (1994-11-01), Jamieson et al.
patent: 5467850 (1995-11-01), Skalski

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