Improvements in Driving Mechanism for Cycles.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in Driving Mechanism for Cycles.
I, WILLIAM VIOLI, of 52 Dean Street, Soho, London, W., do hereby declare the
nature of this invention to be as follows:-
This invention relates to the driving mechanism particularly adapted for cycles.
the arrangement being such that a great increase of speed over that ordinarily
secured may be obtained.
According to this invention it is proposed that the shaft carrying the pedals shall
also carry a gear wheel driving by chain or direct on to a smaller gear mounted on
a second shaft carried to the frame-work, said second shaft also carries, preferably
on the other side of the frame, a third gear of larger size from which the driving
chain to the wheel axle passes.
3000
For the Applicant,
PHILIP M. JUSTICE,
55 and 56 Chancery Lane, London, Chartered Patent Agent.
Improvements in Driving Mechanism for Cycles.
I, WILLIAM VIOLI, formerly of 52 Dean Street, but now of 7 Soho Street, Soho,
London, W., Caterer, do hereby declare the nature of this invention und in what
manner the same is to be perforined, to be particularly described and ascertained
in and by the following statement :-
This invention relates to the driving mechanism particularly adapted for cycles,
the arrangement being such that a great increase of speed over that ordinarily
secured may be obtained or it may be an increase of power if desired.
According to this invention it is proposed that the shaft carrying the pedals shall
also carry a sprocket wheel driving by chain onto another sprocket or a gear driving
direct on to a sinaller gear mounted on a second shaft carried by the frame-work,
said second shaft also carries, preferably on the other side of the frame, a third
sprocket wheel of larger size from which the driving chain to the wheel axle passes.
To illustrate my invention I have shown one form of it in the accompanying
drawing which is a portion of a chain driven bicycle of the present "safety" type
wherein a supplemental sprocket wheel arrangement as described is applied to the
bottom bracket of the frame.
In this drawing a is a sprocket wheel which is driven by the cranks b b in the
usual way. The wheel drives through a chain c a smaller sprocket wheel & which

page_text: is suitably carried in a bearing on the frame and on the other side of the frame the
shaft to which the sprocket wheel d is secured has secured to it a large sprocket
wheel e which drives by chain f the sprocket wheel g on the axle of the back
wheel i.
In this manner an increased speed is given to the sprocket wheel e. Or by
suitably varying the sizes of the sprocket wheels increased power may be obtained
in place of increased speed.
As stated engaging spur gears inay be used in place of the supplemental
wheels a d and chain c.
The arrangement is applicable" to what a known as "chainless " cycles or those
in which the back wheel is driven by two sets f bevel gearing connected by a shaft
in which case the forward bevel gearing may be driven by an arrangement of
sprocket wheels and chain as illustrated at a dc or by spur gearing as stated.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that
what I claim is :-
1. In driving mechanism for cycles the supplemental sprocket wheels and chain
or gearing arranged and applied to the framing of a cycle substantially as described.
2. The improved driving mechanism for cycles constructed and arranged
substantially as described and illustrated.
11907