Free fall safety device

Details Free fall safety device Free fall safety device

1975-04-03

1976-04-13

Reger, Duane A.

Brakes

Operators

Speed-responsive

240 64, 248320, F16D 5902

Patent

active

039498425

ABSTRACT:
A device to prevent the light-channel ring and lighting fixtures of high mast lighting installations from falling in the event of failure of the main hoisting cable or in the event of failure or inadvertent release of the releasable supporting means at the top of the mast. During normal hoisting operations the device is held in a closed or released position by the applied hoisting forces and opens or locks when the light-channel ring is locked in place at the top of the mast for double security. If the load should be released through failure or interruption of the hoisting cable, the device opens and locking arms expand therefrom and contact the tapered inside wall of the mast to instantly lock the cable assembly at any position therealong. A spring-loaded pin and ratchet prevent the arms from retracting once they are released, thus preventing advance of the device into portions of the mast of smaller diameter.

REFERENCES:
patent: 604557 (1898-05-01), Baum
patent: 3579910 (1971-05-01), Wetter
patent: 3805054 (1974-04-01), Wolf

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