Improvements in the Driving Gear of Cycles.
Year: 1897

page_text: Date of Application, 21st Aug., 1897
Complete Specification Left, 19th May, 1898-Accepted, 9th July, 1898
PROVISIONAL SPECIFICATION.
Improvements in the Driving Gear of Cycles.
We, JOHN WYLIE, of 91, Springfield Road, in the County of the City of Glas-
gow, Blacksmith, and HUGH O'NEILL, of 80, John Street, Govan, in the County
of Lanark, Foreman, do hereby declare the nature of our invention to be as
follows:-
This invention has reference to and comprises improvements in the driving
gear of cycles by which one revolution of the pedal cranks will produce two
revolutions of the driving sprocket or chain wheel, thus enabling the cycle to
be driven at a high rate of speed.
In carrying into practice the improvements of this invention the driving gear
and sprocket wheels are duplicated for each foot of the rider, a driving chain
with corresponding pair of sprocket wheels being used on each side of driving
wheel of cycle, so that it is only necessary to describe the arrangements for one
foot or side which are as follows, when applied to a bicycle:-
A spindle much the same as commonly used is inserted through the boss of
machine frame, but instead of being loose in same it is fixed by a pin passing
through both or any other suitable means, and projects on both sides to an equal
extent. On this spindle is mounted loose first the sprocket wheel formed pre-
ferably with a boss to one side which may be fitted with antifriction balls. Out-
side of this sprocket wheel is mounted also loose on the spindle a small bevel
toothed wheel which may be connected to the sprocket wheel in any suitable
manner or it may be formed in one piece with it.
A cylindrical block which may also be fitted with antifriction balls is then
placed loose on the spindle and outside of this another bevel toothed wheel of
the same diameter as the first but keyed or otherwise fixed to the spindle, and
outside of all the usual crank arm of the pedal but so as to revolve loose on the
spindle and which is retained in place by a washer and split pin or equivalent
means.
A bevel
To the outer end of pedal crank arm a bent arm is secured the other end
of which is secured to the cylindrical block by screwing or other means.
toothed wheel of the same diameter as the others above mentioned is carried on
a bearing on this bent arm at its inner end so as to engage with the two other
wheels and is kept in position by jam nuts screwing on the bent arm, or other-
wise. Though it is preferred to retain the ordinary crank arm as a stay it could
be dispensed with and the pedals mounted on the bent arm.
When the bent arm with its bevel wheel is revolved the bevel wheel would
be caused to revolve on its axis by the action of the bevel wheel fixed on the
spindle and so he made to revolve the bevel wheel attached to the sprocket wheel
twice during one of its revolutions round the fixed spindle. For tricycles and
other vehicles the arrangements would be similar.
1
dor of fugust 1897
W. R. M. THOMSON & Co.,
96, Buchanan Street, Glasgow, Agents.

page_text: THE DIVING Car or Cycles.
We, JOHN WYLIE, of 91, Springfield Road, in the County of the City of Glas-
gow, Blacksmith, and HUGH O'NEILL, of 80, John Street, Govan, in the County
of Lanark, Foreman, do hereby declare the nature of our invention and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement in writing, reference being made to the accom-
panying drawing:-
This invention has reference to and comprises improvements in the driving
gear of cycles by which one revolution of the pedal cranks will produce two
revolutions of the driving sprocket or chain wheel, thus enabling the cycle to be
driven at a high rate of speed.
And in order that our said invention may be properly understood we have
hereunto appended an explanatory drawing showing our improved driving gear
as applied to a bicycle, the gear of one side being shown in elevation, and that
of the other in section.
In carrying into practice the improvements of this invention the driving
gear and sprocket wheels are duplicated for each foot of the rider, a driving chain
with corresponding pair of sprocket wheels being used on each side of driving
wheel of cycle, so that it is only necessary to describe the arrangements for one
foot or side which are as follows, when applied to a bicycle.
Referring to the drawing:.
A spindle A much the same as commonly used is inserted through the boss
B of machine frame C, but instead of being loose in same it is fixed by a pin a
passing through both or any other suitable means, and projects on both sides to
an equal extent. On this spindle is mounted loose first the sprocket wheel I)
formed, it may be with a boss to one side, or as shown, which may be fitted with
the antifriction balls d. Outside of this sprocket wheel D is mounted also loose
on the spindle A a small bevel toothed wheel E which may be connected to the
sprocket wheel D in any suitable manner or it may be formed in one piece with it.
A cylindrical block F which may also if desired be fitted with antifriction
balls is then placed loose on the spindle A and outside of this another bevel
toothed wheel G of the same diameter as the first wheel E but keyed or otherwise
fixed to the spindle A and outside of all the usual crank arm H of the pedal I
but so as to revolve loose on the spindle A and which is retained in place by a
washer and split pin as shown in elevation, or equivalent means such as a screw
as shown in section.
To the outer end of pedal crank arm H a bent arm J is secured the other end
of which is secured to the cylindrical block F by screwing or other means.
bevel toothed wheel K of the same diameter as the other wheels E and G above
mentioned is carried on a bearing on this bent arm at its inner end so as to engage
with the two other wheels and is kept in position by jam nuts k screwing on
the bent arm or by other equivalent means. Though it is preferred to retain
the ordinary crank arm H as a stay it could be dispensed with and the pedals
mounted on the bent arm J as indicated in dotted lines.
When the bent arm J with its bevel wheel K is revolved the bevel wheel would
be caused to revolve on its axis by the action of the bevel wheel G fixed on
the spindle A and so be made to revolve the bevel wheel E attached to the
sprocket wheel D twice during one of its revolutions round the fixed spindle.
For tricycles and other vehicles the arrangements would be similar.

page_text: Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is:-
First. The improvements in the driving gear of cycles consisting of the com-
bination of the fixed spindle A the block F, the bevel wheels E G K and the
sprocket wheels D all substantially as herein described and illustrated by the
accompanying drawing.
Second. The construction or arrangement and combination of the parts of
driving gear for cycles all substantially as herein described and illustrated by
the accompanying drawings.