Bicycle speedometer tire drive gear adaptor assembly
AssigneeStewart-Warner Corporation
InventorCharles F. Henecke
Life of this patent
Estimating the term…
Abstract
A bicycle speedometer tire drive gear adaptor assembly comprising a pair of helical gears engaging at an angle of substantially 120.degree.. The gears are supported in a unitary housing with one of the gears rotated by a friction wheel engaging the bicycle tire and the other, which utilizes its own teeth as a bearing, rotates at a substantially reduced speed to transmit movement through a flexible shaft to the speedometer. The angle of gear engagement aids in eliminating sharp corners or small radii in the flexible shaft. The housing is secured to the front bicycle fork by oppositely directed arcuate spring clip fingers having reverse bent ends nesting in and conforming to the shape of a pair of longitudinal grooves in the housing to securely hold the housing.
Claims6
A bicycle speedometer and drive assembly, comprising;
- a speedometer having a rearwardly projecting boss extending on a first axis, a flexible shaft connected to said speedometer boss, an integrally formed housing having a pair of passageways therein with the axes of said passageways arranged at an obtuse angle to each other and offset from each other, bracket means for connecting said housing to a bicycle fork, a helical gear in each passageway, an opening in said housing communicating said pair of passageways with each other for enabling engagement between said helical gears, each of said gears having teeth, a shaft extending axially from one of said gears, and a tire drive wheel for engaging the side of the tire of said bicycle and fixed to said shaft on said one gear for rotating said gears and flexible shaft in response to rotation of said tire for operating said speedometer, the axes of the drive wheel being substantially perpendicular to the speedometer boss first axis so that the flexible shaft does not have any significant bend, one of said gears being rotatably supported in the housing by engagement between the teeth and the associated passageway, said one gear having an opening therein, said flexible shaft being received in said opening in said one gear.
Dependencies are inferred from the claim text.