Improvements in and connected with Driving Mechanism for Cycles and other Vehicles.
Year: 1899

page_text: Date of Application, 7th Apr., 1899
Complete Specification Left, 8th Jan., 1900 -Accepted, 10th Feb., 1900
Improvements in and connected with Driving Mechanism for Cycles
and other Vehicles.
I, JOHN DICK, of 15, Church Street, Partick, in the County of Lanark, North
Britain, Optician, do hereby declare the nature of this invention to be as
follows:
This invention relates to improvements in and connected with cycles and
other vehicles.
In carrying out my invention, in place of having the chain wheel carried
between the two wheels of the cycle as at present, I carry the back stays of the
frame of the machine, as well as the chain wheel bracket beyond the rim of the
back wheel so that the chain wheel is carried at back of machine, the cog re-
maining in its present position. Fixed to or forming part of the back end of
the frame there is a suitable bracket, to which there is connected on each side
thereof a lever at the extreme end of which the treadles are connected. Fixed
to each end of the spindle to which the chain wheel is connected there is a
crank, to which there is pivoted one end of a connecting rod, the other end being
connected to the treadle lever.
The operation of the cycle is as follows:-The levers are made to rise and
fall by the pressure of the feet on the treadles, and by the rising and falling
of these levers the connecting rods operate the cranks fixed to the spindle of the
chain wheel, which of course in turn communicates motion to the back wheel
of the cycle and so propels the same.
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T 1
1900
Improvements in and connected with Driving Mechanism for Cycles
and other Vehicles.
I, JOHN DICK, of 15. Church Street, Partick, in the County of Lanark, North
Britain, Optician, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:-
This invention relates to improvements in and connected with cycles and
other vehicles.
In order that my invention may be properly understood and readily carried
into effect I have hereunto appended one sheet of drawings, of which,
037

page_text: Figure 1 is a side elevation of a bicycle illustrating my improvements.
Figure 2 is a plan of the same.
Figure 3 is a part plan of the chain wheel crank mechanism and actuating
levers, all hereafter more fully described.
In carrying out my invention, in place of having the chain wheel A carried
between the two wheels B and C of the cycle as at present, I extend the back
stays of the frame of the machine considerably to the rear, at which point the
two stays D and E terminate in one, as seen in Figures 2 and 3, in order to
form the chain wheel bracket, in whose bush the chain wheel axle F is carried
as seen in Figure 3, the cog P remaining in its present position in the rear
wheel. The chain wheel axle F is mounted with a crank G and H at either
end of the bush, one of the arms of the chain wheel constituting the crank G
aforesaid. Engaging with the cranks G and H aforesaid are the two connect-
ing rods I and J, which are connected by forks and cross pins to the two lateral
levers K and L of cantilever formation, though they may partake of any other
shape or configuration, as for example that of a girder. These lateral levers K
and L have their fulcrums at M which are carried in the outer ends of two
depending arms N and O projecting from the chain wheel bracket.
Mounted at the opposite ends of the lateral levers K and L are the usual
pedal attachments. Quadrantal guides K¹ and L' are placed at either side of the
cycle in order to keep the levers in their plane of motion. The operation of
the cycle is as follows:-The levers K and L are made to rise and fall by the
pressure of the feet on the treadles, and by the rising and falling of these
levers, the connecting rods I and J cause a rotary motion to be given to the
cranks G and H which is communicated to the chain wheel axle, which motion
by the chain is transmitted to the rear wheel of the cycle in the usual manner.
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 cycles and other vehicles the arrangement by which the chain wheel
is carried in a prolongation of the back stay and the means of driving it by means
of cranks, connecting rods, and long lateral levers mounted with the usual
pedal attachments, substantially as described and illustrated on the accompany-
ing sheet of drawings.
2. The general arrangement and combination of the parts operating substan-
tially as and for the purposes herein before described and illustrated on the
accompanying drawings.
BOTTOMLEY & LIDDLE,
154, St. Vincent Street, Glasgow, Applicant's Patent Agents.