Positive terminal overspeed protection by rail grabbing

Details Positive terminal overspeed protection by rail grabbing Positive terminal overspeed protection by rail grabbing

1992-10-23

1994-04-12

Dayoan, D. Glenn

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

187108, 188189, B66B 516

Patent

active

053017730

ABSTRACT:
A permanent magnet 54 mounted on rods 41 passes vertically over a conductive plate 56 in an elevator hoistway 36, a reactive force causes movement of the permanent magnet 54 vertically away from the conductive plate 56 so that a wedge 24 secured to the rods 41 moves within a tapered wedge guide 44 until it contacts an elevator guide rail 14 on which an elevator car 2 is riding, thereby braking the elevator car 2.

REFERENCES:
patent: 1581459 (1926-04-01), Lindquist
patent: 1738215 (1929-12-01), Thurston et al.
patent: 1948746 (1934-02-01), Dunlop
patent: 3441107 (1969-04-01), Thorne et al.

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