Control device for a derailleur

Details Control device for a derailleur Control device for a derailleur

1979-05-29

1981-04-07

Husar, C. J.

Machine element or mechanism

Control lever and linkage systems

Hand operated

74489, F16C 122

Patent

active

042598796

ABSTRACT:
A control device for a bicycle derailleur cooperates with a control lever to control the derailleur through a control wire and absorb a change in length in the wire. The control device includes a positioning plate which serves to position the lever and is supported relatively rotatably under resistance greater than strength of a return spring at the derailleur, with respect to one of the lever and a fixing member supporting the lever, and is made freely rotatable with respect to the other, so that during operation of the lever for changing the bicycle speed the positioning plate, when subjected to a wire tension over a predetermined value, is secured to the lever or fixing member and, when subjected to a tension less than the predetermined value, is allowed to be freely rotatable, thereby automatically absorbing a change of length in the wire.

REFERENCES:
patent: 3924487 (1975-12-01), Huret et al.
patent: 3943794 (1976-03-01), Shinada

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