Line brake device useful for fire escape

Details Line brake device useful for fire escape Line brake device useful for fire escape

1976-11-22

1978-06-06

Blix, Trygve M.

Implements or apparatus for applying pushing or pulling force

Step-by-step traveling bar

Pawl actuated

182191, 188 651, B65H 5916

Patent

active

040931862

ABSTRACT:
A manually controlled device for lowering people or objects safely from tall buildings having two spaced pulley assemblies, held in place by a cylindrical frame. One end of the frame holding one pulley assembly is rotatable with respect to the other end of the frame. A rope threaded between the two pulley assemblies binds against itself when one pulley assembly is rotated with respect to the other pulley assembly. The rate of descent of a person or object connected to one end of a rope threaded through the device is controlled by the degree of rotation between the two pulley assemblies.

REFERENCES:
patent: 374244 (1887-12-01), Fisher
patent: 1241701 (1917-10-01), Bencur
patent: 3437178 (1969-04-01), Postlethwait
patent: 3826341 (1974-07-01), Ledner

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