Improvements in Tubular Fork Sides for Use on Bicycles, Tricycles, and other Vehicles.
Year: 1888

page_text: Date of Application, 25th Oct., 1888
Complete Specification Left $26th July 1889-Accented. 7th Sept.. 1889
PROVISIONAL SPECIFICATION.
Improvements in Tubular Fork Sides for Use on Bicycles, Tricycles,
and other Vehicles.
We THOMAS WARWICK FREDERICK WARWICK, and EDWARD WARWICK Bicycle
Manufacturers of Alma Street Aston in the County of Warwick do hereby declare the
nature of this invention to be as follows:-
This invention in the following improved method of forming a solid end in
conjunction with a hollow fork.
By the present method a seperate solid end is provided on which is formed a
shank the shank is then introduced into the end of the hollow tube and secured
thereby pressing between dies or by other suitable means.
By our improved method we provide a metal plug the transverse section of which
would fill the hollow tube we introduce the plug into the end of the hollow tube
or fork, we next heat the tube together with the plug, we then place the heated
parts between suitable dies and stamp the oval hollow shell into a flat position at the
end, thus the two thicknesses of the shell would be flattened and amalgamated together,
forming one solid part; the pressing or stamping between the dies-produces a solid
ond of the required horizontal configuration. The plug would extend up the end of
hollow fork-tube to any required distance beyond the Hattened solid end and would
during the process of stamping become amalgamated with the material constituting
the tube-fork.
In some cases when we wish to make a solid end of a greater thickness than
what can be produced by flattening the tube together, we form the plug of suitable
shape to leave a layer of the desired thickness between the two thicknesses of the
flattened tube.
ALFRED WILLIAM TURNER,
Cobden Buildings, Corporation Street, Birmingham, Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Tubular Fork Sides for Use on Bicycles, Tricycles,
and other Vehicles.
We THOMAS WARWICK, FREDERICK WARWICK, and EDWARD WARWICK, Bicycle
Manufacturers of Alma Street Aston in the County of Warwick, 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 consists in the following improved method of forming a solid end in
conjunction with a hollow fork.
By the present method a separate solid end is provided on which is formed a shank
the shank is then introduced into the end of the hollow tube and secured thereby
pressing between dies or by other suitable means.
By our improved method we provide a metal plug the transverse section of which
would fill the hollow tube we introduce the plug into the end of the hollow tube or
fork, we next heat the tube together with the plug, we then place the heated parts
together between suitable dies and stamp the oval hollow shell into a flat position at
the end, thus the two thicknesses of the shell would be flattened and amalgamated
together forming one solid part the pressing or stamping between the dies produces
a solid end of the required horizontal configuration. The plug would extend up the
end of the hollow fork tube to any required distance beyond the flattened solid end
and would during the process of stamping become amalgamated with the material
constituting the tube fork.

page_text: In some cases when we wish to make a solid end of a greater thickness than what
can be produced by flattening the tube together we form the plug of suitable shape
to leave a layer of the desired thickness between the two thicknesses of the flattened
tube.
We will now proceed to describe with reference to the accompanying drawings
the manner in which wo form a solid end on a hollow fork.
Figure 1 represents a hollow fork ready to receive the plug.
Figure 2 represents figure 1 with the plug introduced.
Figure 3 represents the hollow fork with the plug introduced and afterwards
compressed in the manner illustrated.
Figure 4 is an end view of figure 3.
Figure 5 is an elevation of the plug.
Figure 6 is a section of the plug figure 5.
In carrying out our invention we provide any ordinary fork as represented at
figure 1 we next provide a plug a as represented at figures 5 and 6, we introduce the
plug a into the hollow fork as represented dotted in at figure 2 we next heat the
hollow fork and plug a and introduce the said plug a and hollow-fork between
suitable dyes and stamp or press the parts a and b together into the form represented
at c figures 3 and 4.
It will be readily understood from the preceding description that a part of the
plug a is amalgamated with the two upper and lower thicknesses constituting the
hollow fork thereby producing a solid end of the required horizontal configuration
the whole surface of the plug a is by the process of stamping and pressing
amalgamated with the shell.
Having now particularly described and ascertained the nature of our said inven
tion and in what manner the same is to be performed we declare that what we
claim is
The making of a fork for use on bicycles, tricycles or other vehicles by the
amalgamation of a ping with the shell of a fork tube in the manner illustrated and
described.
ALFRED WILLIAM TURNER,
Cobden Buildings, Corporation Street, Birmingham, Agent for the Applicants.