Bicycle gear shift derailleur

Details Bicycle gear shift derailleur Bicycle gear shift derailleur

1974-12-12

1976-09-14

Scott, Samuel

Machine element or mechanism

Gearing

Toothed gear and recirculated unconnected elements

74242, 74475, 74527, F16H 722, F16H 1100

Patent

active

039799620

ABSTRACT:
A parallelogram-type derailleur is provided with a curved guide member or sheave which increases the moment arm of the cable acting on the parallelogram by diverting the direction of pull on the cable 90.degree. and thus results in a longer stroke and less pulling power. A longer stroke is employed advantageously on a hand lever that can be moved through a circular shift range of about 180.degree. so that the hand lever can be moved into various shift positions merely by feel.

REFERENCES:
patent: 3442148 (1969-05-01), Juy
patent: 3481217 (1969-12-01), Maeda
patent: 3748916 (1973-07-01), Morse

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