Year: 1887

page_text: Date of Application, 14th July, 1887
Complete Left, 16th Apr., 1888
Complete Accepted, 18th May, 1888
We, THOMAS RUSHFORTH MARRIOTT, and FREDERICK COOPER, both of No. 65,
Holborn Viaduct, London, E.C., Manufacturers, do hereby declare the nature of this
invention to be as follows:-
Our invention relates to an improved driving gear for bicycles, and is more particu-
larly applicable to the Rover type of machine, i.e., rear driving machines having both
wheels of approximately the same diameter.
The treadles of a Rover machine are revolved intermediately of the two wheels-
steerer and driver and are geared to the driver by means of a chain and chain
pulleys. It is the general practice to gear up so that the driver shall make more
revolutions per minute than the treadles and thereby raise the speed of the machine as
high as is desirable.
Now, according to our present invention, we place the chain wheel outside the fork,
lengthening the axle accordingly, and make it removable from the axle so that it can
be taken off and replaced by another of a larger or smaller diameter as may be
required.
We do not confine ourselves to any particular method of providing for the remov-
ability of the chain wheel of the driver from its axle or for holding the said wheel
firmly upon the axle, inasmuch as any convenient device may be adopted..
PHILLIPS & LEIGH,
Agents for the Applicants:

page_text: Improvements in Driving Gear for Divy cies.
We, THOMAS RUSHFORTH MARRIOTT and FREDERICK COOPER, both of No. 65,
Holborn Viaduct, London, E.C., Manufacturers, 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:-
Our invention relates to an improved driving gear for safety bicycles, and is more
particularly applicable to the "Rover" type of machine, ie., rear driving machines
which have both wheels of approximately the same diameter.
The treadles of a Rover" machine are revolved intermediately of the two wheels
steering and driving, and are geared to the driver by means of a chain and chain
wheel. It is the general practice to gear up, so that the driving wheel shall be driven
at a higher speed that the treadles, for the purpose of increasing the speed of the
machine.
Now, according to our present invention, we fix the said chain wheel outside of
the fork of the driving wheel, longthening the axle accordingly, and fix it on the axle
in such a way that it is interchangeable and can be easily taken off and replaced.
In order that our invention, and the means by which it is to be carried into practical
effect, may be thoroughly understood, we will proceed to describe the same in detail,
referring in so doing to the accompanying drawings which are to be taken as part of
this specification and read therewith, and in which
Fig. 1 is a rear; and. Fig. 2, a side elevation, illustrating our invention, and its
application to the driving wheel of a rear driving bicycle or tricycle.
A is the treadle chain wheel carried by a bracket, a, pivotted to the frame at a¹.
B is an adjusting device, by which the distance between the axes of the, wheels, A:
and C, when an exchange of the latter is made, can be regulated.
C is the removable chain wheel on one end of the axle, c. D is the fork, and it is
to be noted that the axle, c, is made long enough to carry the chain wheel, C, outside
the fork, D, as clearly shown in the figures.
Any suitable device may be adapted for the purpose of holding the chain wheel, C,
upon its axle, provided that the said device will hold the wheel firmly in working
position and is sufficiently simple in manipulation to allow of the exchange of wheels
being quickly effected.
It will be obvious that the whole of the foregoing may be with facility applied to
every description of rear driving bicycle or tandem tricycle..
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 :-
1. In rear driving cycles, fixing the chain wheel of the driver outside the fork of
the latter.

page_text: 2. In rear driving cycles, fixing the chain wheel of the driver outside the fork of
the latter in such a way that it can be taken off and exchanged for another.
3. In a rear driving cycle, the combination of driving wheel, fork, rear axle projecting
through the fork on one side, and adapted thereby to receive a chain wheel upon its
projecting end outside the said fork.
4. In rear driving cycles the combination of driving chain wheel, driving chain,
and a chain wheel fixed outside the fork of the driving wheel on the axle of the
latter.