Fire escape – ladder – or scaffold – Torso harness – Strand-engaging – with descent retarder
Patent
1982-04-22
1984-09-11
Machado, Reinaldo P.
Fire escape, ladder, or scaffold
Torso harness
Strand-engaging, with descent retarder
182 72, A62B 120
Patent
active
044704801
ABSTRACT:
This manually operated conveying apparatus for lowering loads is easy to operate, light in weight and most of all it is safe for use.
The apparatus has a rope made into a big loop. It is supported by a shaft with a roller inside the frame. When a load is applied to said rope it produced tension that causes the shaft housings to swing in the direction going with the load and the shafts that are fixed to the shaft housings pressed said rope against the rollers. These pressures tend to hold the rope and stop the load from going down but as the weight of the load exceeds this pressures the load goes down producing another sets of forces, the forces of friction between the rope and the rollers, between the shaft and the rope and between the roller and the shafts. The combined forces produced by the pressures and the frictions are going in the opposite direction that tend to hold and stop the load from going down. These combined functions of the elements inside the frame such as the shafts, the shaft housings and the rollers to hold the rope, enable the apparatus to reduce the weight of the load to the minimum that made it easy to control and lower the load.
REFERENCES:
patent: 816495 (1906-03-01), Moore
patent: 876840 (1908-01-01), Reuter
patent: 1408273 (1922-02-01), Davis
patent: 3542158 (1970-11-01), Arnold
patent: 4157127 (1979-06-01), Katsube
patent: 4191275 (1980-03-01), Mansfield
Chin-Shue Alvin
Machado Reinaldo P.
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