Improvements in and pertaining to Forked Frames for Cycles.
Year: 1894

page_text: Date of Application, 14th Apr., 1894
Complete Specification Left, 12th Sept., 1894-Accepted, 20th Oct., 1894
PROVISIONAL SPECIFICATION.
Improvements in and pertaining to Forked Frames for Cycles.
I, CHARLES BROWN, of 3 Highfield Road, Smethwick, in the County of
Stafford, Engineer, do hereby declare the nature of this invention to be as.
follows:
This invention relates to improvements in, and pertaining to the forked frame
of a bicycle, tricycle or other cycle.
The object of my invention is to construct a forked frame with the crown or
crosspiece at its upper end, from one and the same length of steel or other tubing,
and thus to avoid the necessity of jointing required with forked frames of the usual
construction.
In carrying my invention into effect, I cut a circular or other tube of the required
length, and forge or flatten its ends, suitable for drilling, punching or boring for
the reception of the spindle of the wheel to be carried between the forked frame.
I also forge or flatten the tube to a lesser extent for nearly half its length from
each end, to an elliptical or other shape or configuration required for the legs of
the frame, and then bend the tube from each side to form the two legs parallel or
nearly parallel with each other, but at right, or nearly at right angles with the
crown or crosspiece. I drill, punch or bore the eye in this crown or crosspiece for
the reception of the steering head or other part of the cycle preferably after the
bending process before described, although I sometimes partly form the eye before
bending.
In this manner I construct my improved fork together with its crown or crosspiece
from one and the same length of steel or other tube, instead of from separate legs
and crown or crosspiece, as with the usual methods of construction.
I do not limit the application of my invention to any one general form or pattern.
of forked frame, but employ it with like advantage in the construction of forked
frames for varying types of cycles, bending or shaping the tube to the particular
configuration required.
Dated this 13th der of Anril 1901
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in and pertaining to Forked Frames for Cycles.
I, CHARLES BROWN, of 3 Highfield Road, Smethwick, in the County of
Stafford, 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 improvements in and pertaining to the forked frame of
a bicycle, tricycle or other cycle.
The object of my invention is to construct a forked frame with the crown or
crosspiece at its upper end, from one and the same length of steel or other tubing,
and thus to avoid the necessity of jointing required with forked frames of the usual
construction.

page_text: In the accompanying sheet of explanatory drawings-
Figure 1 represents a front elevation and Figure 2 a plan of my improved forked
frame.
Figure 3 is an end elevation-of the frame, and Figure 4 a plan showing a section
on the line a b in Figure 3.
The same reference letters in each figure indicate the same parts.
In carrying my invention into effect, I cut a circular or other tube preferably of
mild steel of the required length, and forge or flatten its extreme ends, suitable
for drilling, punching, or forming the holes or eyes A A¹ for the reception of the
spindle of the wheel to be carried between the forked frame. I also forge or
flatten the tube to a lesser extent for nearly half its length from each end, to an
elliptical shape as shown in section at Figure 4 or to such other shape or
configuration as may be required for the legs of the frame, and then bend the tube
from each side after suitable heating to form the two legs B B' parallel or nearly
parallel with each other, but at right or nearly at right angles with the central
portion of the tube which I form as the crown or crosspiece C. I forge or form
the eye boss D of this crown or crosspiece and drill, punch, or bore the eye for the
reception of the steering head or stem represented by dotted lines in Figures 1
and 2, or other part of the cycle, preferably after the bending process before
described, although I sometimes partly form the eye and boss at the central part of
the heated tube, prior to such bending. The stem, or other cycle part is brazed or
otherwise secured within the boss D.
In this manner I construct my improved fork together with its crown or crosspiece
from one and the same length of steel or other tube, instead of from separate legs
connected to the independent crown or crosspiece, as with the usual methods of
construction.
I do not limit the application of my invention to any one general form or pattern
of fork or forked frame, but employ it with like advantage in the construction of
forked frames for varying types of cycles, bending or shaping the tube-to-the
particular configuration required.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. The method of producing a cycle fork or forked frame from one piece or
length of tube substantially as hereinbefore described.
2. A cycle fork or forked frame in which the fork part consists of a continuous
length of tube suitably bent, and perforated and expanded at the crown for the
reception of a brazed or otherwise fastened stem, substantially as hereinbefore
described.
3. The construction of a cycle fork or forked frame by suitably bending aud
forging one piece of tube to the required form substantially as hereinbefore
described and as illustrated in the accompanying drawings.
Dated this 12th day of September 1894.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents for the Applicant.