Fire escape – ladder – or scaffold – Safety device – platform associated
Patent
1979-04-06
1980-09-30
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Safety device, platform associated
24134N, 188 652, 182142, E05G 310, F16G 1100
Patent
active
042250129
ABSTRACT:
An improved safety clamp device for use with movable platforms and the like includes a body member having a safety cable receiving cradle, a lever arm having a safety cable engaging portion, an elongate member carrying a pulley at either end, and a control arm. The control arm is in the form of a modified bellcrank having one arm portion pivotally connected to the body member, its apex connected to the elongate member and a pulley connected to a second arm portion. The lower end of the elongate member is rigidly connected to the movable platform. A drive or support cable passes on one side of the two pulleys on the elongate member and on the other side of the control arm pulley. The elongate member is maintained in a first position relative to the body member such that the safety cable engaging portion confronts but does not engage the safety cable when the drive or support cable is subjected to a predetermined tension. When the drive or support cable is subjected to less than the predetermined tension, the elongate member is maintained in a second position relative to the body member wherein the safety cable engaging portion engages the safety cable thereby wedging the safety cable against the receiving cradle.
REFERENCES:
patent: 2939550 (1960-06-01), Puttre
patent: 3386530 (1968-06-01), Thompson
patent: 3586125 (1971-06-01), Durand
patent: 3797608 (1974-03-01), Virdis
patent: 4034828 (1977-07-01), Rose
International Telephone and Telegraph Corporation
Lenkszus Donald J.
Machado Reinaldo P.
Raden James B.
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