Luminaire hoist safety device with automatic brake means adjacen

Details Luminaire hoist safety device with automatic brake means adjacen Luminaire hoist safety device with automatic brake means adjacen

1978-05-22

1980-03-25

Nelson, Peter A.

Illumination

Supports

Line-wire or cable-attaching support

362403, 362431, F21V 2136

Patent

active

041953320

ABSTRACT:
Safety device for preventing fall of pole-mounted luminaire support due to breaking of hoisting cable. Device comprises pivoted brake arm which automatically clamps and holds the support cable in the event the hoisting cable breaks during hoisting or lowering operations.

REFERENCES:
patent: 256354 (1882-04-01), Morgan
patent: 537783 (1895-04-01), Littleworth
patent: 661754 (1900-11-01), Burton
patent: 2232890 (1941-02-01), Stillwagon
patent: 2564267 (1951-08-01), Manke
patent: 3840212 (1974-10-01), Latanision
patent: 3944218 (1976-03-01), Cerny
patent: 3958116 (1976-05-01), Jones
patent: 4001573 (1977-01-01), Derasp
patent: 4092707 (1978-05-01), Millerbernd
patent: 4115845 (1978-09-01), Blahut

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