Window sash balancer

Details Window sash balancer Window sash balancer

1975-10-29

1977-03-15

Schroeder, Werner H.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

16198, B65H 7548, E05D 1312

Patent

active

040120082

ABSTRACT:
A window sash balancer is provided for use with slide-out sash windows, double-hung sash windows or the like. The balancer includes a housing, a shaft rotatably supported in the housing and having one end projecting beyond the housing, and a spring disposed within the housing and having one end secured to the housing and the other end to the shaft. The spring normally biases the shaft in one direction of rotation. The shaft has at its projecting end a drum of a frustoconical shape around which there is wound a wire member. A cord is provided in and along a spiral groove defined by adjacent turns of the wound wire member and has one end secured to the drum, the other end being adapted to be connected to a window sash.

REFERENCES:
patent: 1599872 (1926-09-01), Braen

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