Apparatus for applying a constant tensile force to a moving elem

Details Apparatus for applying a constant tensile force to a moving elem Apparatus for applying a constant tensile force to a moving elem

1985-12-09

1988-10-25

Smith, Gary L.

Machine element or mechanism

Control lever and linkage systems

Hand operated

474112, 474115, F16C 110, F16H 710

Patent

active

047794798

ABSTRACT:
A novel spring and dual pulley construction wherein the pulley includes a pair of co-axial grooves, one of the grooves having a constant diameter that accepts a powered cable acting in one direction, while the other groove has a varying radius of curvature that accepts a second cable connected to one end of the tension spring and with the other end of the spring fixedly mounted. This arrangement maintains a constant spring force on a member moving along a slide in a reciprocating fashion and having one side thereof connected to said powered cable for movement in one direction and the other side connected to the second cable for movement in the opposite direction activated by a constant spring force regardless of the extension of the spring.

REFERENCES:
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patent: 2225164 (1940-12-01), Ducout
patent: 2672057 (1954-03-01), Bratz
patent: 2922361 (1960-01-01), Adler et al.
patent: 3111230 (1963-11-01), Pesenti
patent: 3142459 (1964-07-01), Baetke
patent: 3739741 (1973-06-01), Fireyermuth
patent: 4041797 (1977-08-01), Mito
patent: 4502570 (1985-03-01), Westerlund
patent: 4511137 (1985-04-01), Jones
patent: 4615234 (1986-10-01), Chevance et al.

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