Improvements in Motor Velocipedes.
Year: 1897

page_text: WILLIAM DAVY, Greenfield Place, Ryton-on-Tyne, County Durham, Mechanical
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to a method of transmitting the power from the motor
or engine to the driving wheel of the velocipede, also to a method of fixing the
motor or engine, and gearing, to the framework of the velocipede.
For transmitting the power from the motor or engine to the driving wheel of
the velocipede intermediate wheels are used and are driven from the motor or
engine shaft by means of friction, chain, spur, or the like, gearing.
One of the intermediate wheels is a chain pinion over which runs the driving
chain this chain also runs round the chain wheel upon the pedal axle and round the
chain wheel attached to the driving wheel.
Where the frame tubing in a velocipede is not of sufficient stiffness to admit
of a motor or engine with the necessary gearing being attached to it, the motor or
engine and gearing are fixed to a bar or frame, which bridges over the frame tubing
is clamped or otherwise fastened to some stronger part or parts of the velocipede
framing, such as the bottom pedal bracket, the fitting at the bottom of the head
tube, and the seat lug.
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Improvements in Motor Velocipedes.
WILLIAM DAVY, Greenfield Place, Ryton-on-Tyne, County Durham, Mechanical
Engineer, 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 a method of transmitting the power from the motor
or engine to the driving wheel of the velocipede, also to a method of fixing the
motor or engine and gearing, to the framework of the velocipede.
The power is transmitted from the motor or engine shaft A in Figs. 1 and 2 to
the driving wheel B of the velocipede, through the intermediate wheels C and D,
the wheel C being connected to the wheel D by both wheels being keyed or other-
wise fixed to the cross shaft E running in the bearing F, or the wheels C and D
may be made in one, or suitably joined or locked together and turn upon the pin G
Fig. 3, the pin being suitably fixed to the standard or casting H.

page_text: The intermediate wheels may be driven from the motor or engine shaft by
means of friction, chain, spur or the like gearing; in the drawing spur gearing is
shown.
The intermediate wheel D is a chain pinion with suitable teeth for engaging
in the driving chain I which runs over the intermediate wheel I), round the
chain wheel J upon the pedal axle, and round the chain wheel K which is attached
to the driving wheel B.
Where the frame tubing in a velocipede is not of sufficient stiffness or strength
to admit of a motor or engine with the necessary gearing being attached to it,
as in an ordinary safety cycle, the motor or engine and gearing are mounted upon
and fixed to a hollowed bar which bridges over the frame tubing and is clamped
or otherwise fastened to some stronger part or parts of the velocipede framing.
By a hollowed bar" is meant a bar which is constructed so as to saddle over,
or encircle, the frame tubing of the velocipede.
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Fig. 4 shows a hollowed bar L saddling over the frame tubing M, and Fig. 5
shows a hollowed bar N encircling the frame tubing M, the two portions being
suitably bolted, clamped, or otherwise connected together.
Hollowed bars may bridge over the bottom tube 0, and the down tube P, of the
velocipede concurrently, being clamped or otherwise attached to the fitting Q
at the bottom of the head, the bottom bracket R. and the seat lug S, or the bar
may bridge over the bottom tube 0 only, or the down tube P only as may be
required. Fig. 1 shows the bar bridging over the bottom tube 0.
Fig. 6 shows a method of clamping the hollowed bar to either of the
fittings Q, R, S, L being the hollowed bar. V the neck of the fitting to which is
brazed or otherwise fastened the frame tubing: T, U, pieces of india-rübber, leather,
soft metal, or other suitable packing.
Circular sections are shown for the hollowed bars, but bars of a hollow triangular,
square, polygonal, elliptical, or other like sections may be used.
The drawing shows the intermediate wheels and hollowed bar applied to a
bicycle but they are equally applicable to tricycles, quadricycles and the like.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is:-
1. The combination with a velocipede driven by a motor or engine in addition
to foot power, of intermediate wheels one of which is a chain pinion engaging in
the driving chain, as herein before described and shown in the drawing.
2. The combination with a velocipede driven by a motor or engine in addition
to foot power, of a hollowed bar or bars for carrying the motor or engine and
gearing, as herein before described and shown in the drawing.
3. The combined velocipede, intermediate wheels, and hollowed har, or bars, 4
as herein before described and shown in the drawing.
Dated this 4th day of January 1808
WILLIAM DAVY.