Improvements in Bicycles.
Year: 1889

page_text: Date of Application, 14th Oct., 1889
Complete Specification Left, 14th July, 1890-Accepted, 6th Sept., 1890
.
PROVISIONAL SPECIFICATION
Improvements in Bicycles.
We, GEORGE SITTON and EDWARD HUBBALL, both of 16, Eversholt Street, Oakley
Square, St.. Pancras, in the County of London, Cycle Manufacturers, do hereby declare
the nature of this invention to be as follows:-
Our invention relates to bicycles and consists chiefly in the novel construction of
the frames as hereinafter described.
At
In a bicycle constructed according to our invention we employ what we term a
duplex frame, the two arms or parts of which are connected at the front end to the
socket through which the standard of the fork carrying the front wheel passes.
the rear end these two arms or parts are separated sufficiently to receive the hind or
driving wheel between them.
In practice we prefer to form each arm or part of the frame of a tube which is bent,
so that both ends are secured to the socket carrying the front wheel standard. The
two arms or parts are advantageously held in a rigid position relatively to each other
by struts or braces.
The chief advantages of our invention are that we are enabled to make a bicycle
frame much lighter than heretofore owing to the fact that we can employ light tubes
which can be bent to the desired form thus rendering brazing unnecessary, and that
by the use of a duplex frame we are enabled to place the chain wheel on the pedal
shaft in the centre thereof, instead of at one side as heretofore, whereby the friction
will be reduced.
Dated the 14th day of October 1889
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Bicycles.
We, GEORGE SITTON and EDWARD HUBBALL, both' of 16, Eversholt Street, Oakley
Square, St. Pancras, in the County of London, Cycle 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 bicycles, and consists chiefly in the novel construction of
the frames as hereinafter described.
In a bicycle constructed according to our invention we employ what we term a
duplex frame, the two arms or parts of which are connected at the front end to the
socket through which the standard of the fork carrying the front wheel passes. At
the rear end these two arms or parts are separated sufficiently to receive the hind or
driving wheel between them.
In practice we prefer to form each arm or part of the frame of a tube which is bent,
so that both ends are secured to the socket carrying the front wheel standard. The
two arms or parts are advantageously held in a rigid position relatively to each other
by struts or braces.
To enable our invention to be fully understood we will describe the same with
reference to the accompanying drawing, in which―
Figure 1 is an elevation of a bicycle, the frame of which is constructed according
to our invention; and,
Figure 2 is a plan of the frame detached.
b
a, indicate the two parts of the frame, each of which parts is composed of a single

page_text: tube bent to the shape shewn in figure 1, and secured at its two ends to the socket c
through which the standard d of the front wheel fork passes. In some cases both
sections may be formed from a single tube.
Each of these parts is also provided with a bracket for carrying the bearings for the
driving wheel.
The parts a, b are suitably braced together, for instance, by the braces e, and a
strut is advantageously arranged at the lower side of each of the said parts, for
preventing the pull between the pedal-shaft and the axle of the rear wheel from straining
the frame. A bar g upon which the seat is carried serves to increase the rigidity of
the parts a, b of the frame relatively to each other as also does a bar h at the lower
part of the frame.
The chief advantage of our invention is that we are enabled to make a bicycle frame
much lighter than heretofore, owing to the fact that we can employ light tubes which
can be bent to the desired form, thus rendering brazing unnecessary.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, we declare that what
we claim is :
1. Constructing a bicycle frame of two single bent tubes, the ends of which are
secured to the socket for carrying the front wheel standard, and which are suitably
braced, substantially as described.
2. A duplex bicycle-frame of the kind hereinbefore described, the two sections of
which are formed from a single tube, as set forth.
3. A bicycle provided with a frame constructed substantially in the manner herein-
before described and illustrated in the accompanying drawing.
4. The manufacture of a bicycle frame, substantially in the manner hereinbefore
described and illustrated in the accompanying drawing.
Dated the 14th dav^“In…. 1900
Dated the 14th
day.
QOA
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.