Improvements in Metallic Tubing for the Frames of Bicycles, Tricycles, and other Velocipedes, and for other Purposes where Lightness and Strength are Required.
Year: 1896

page_text: Date of Application, 15th May, 1396
Complete Specification Left, 15th Jan., 1897-4ccepted, 27th Mar.. 1597
PROVISIONAL SPECIFICATION.
Improvements in Metallic Tubing for the Frames of Bicycles,
Tricycles, and other Velocipedes, and for other Purposes where
Lightness and Strength are Required.
I, JOHN VERNON PUGH, of No. 52 Lincoln's Inn, Corporation Street, Birmingham,
in the County of Warwick Mechanical Engineer do hereby declare the nature of
this invention to be as follows:-
My invention consists of the improvements hereinafter described in metallic tubing
for the frames of bicycles, tricycles and other velocipedes and for other purposes,
where lightness and strength are required.
My invention has reference principally to the metallic tubing used in making the
chain stays of the framing of bicycles which said tubing is elliptical in cross section;
but my improvements are also applicable to metallic tubing circular or of other
curvilinear figure in cross section as well as to tubing polygonal or partly curvilinear
and partly plane in cross section.
1 will describe my invention as applied to the making of a cylindrical tube.
I take a strip of thin sheet iron or steel or other hard and ductile metal or alloy
and by rolling drawing or otherwise I give to the said strip a U shaped figure in
cross section, that is, the figure in cross section of a semi-circle the edges of the
semi-circular strip terminating in parallel sides. The parallel sides are turned
inwards into the same plane.
I take two of the said treated strips or semi-circular troughs and a plane or flat
strip of a width equal to the diameter of the tube to be made. The two semi-
circular troughs are placed together mouth to mouth with the plane strip between
them the said plane strip crossing the partially made cylindrical tube as a diameter.
The edges of the plane strip are connected to the inwardly turned flanges of the
two semi-circular troughs by soldering or brazing and the tube thereby finished.
The application of my invention to tubes having a figure in cross section other
than circular differs in no essential respect from its application to cylindrical tubes
as hereinbefore described.
Dated this Fifteenth day of May 1896.
W. T. WHITEMAN,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Metallic Tubing for the Frames of Bicycles,
Tricycles, and other Velocipedes, and for other Purposes where
Lightness and Strength are Required.
1, JOHN VERNON PUGH, of No. 52 Lincoln's Inn, Corporation Street, Birmingham
in the County of Warwick, Mechanical Engineer do hereby declare the nature of my
invention and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement:-
My invention consists of the improvements hereinafter described in metallic tubing

page_text: for the frames of bicycles, tricycles and other velocipedes and for other purposes
where lightness and strength are required.
My invention has reference principally to the metallic tubing used in making the
chain stays of the framing of bicycles which said tubing is elliptical in cross section ;
but my improvements are also applicable to metallic tubing circular or of other
curvilinear figure in cross section as well as to tubing polygonal or partly curvilinear
and partly plane in cross section.
I will describe my invention as applied to the making of a cylindrical tube.
I take a strip of thin sheet iron or steel or other hard and ductile metal or alloy
and by rolling, drawing or otherwise I give to the said strip a U shaped figure in
cross section, that is, the figure in cross section of a semi-circle the edges of the
semi-circular strip terminating in paralled sides. The parallel sides are turned
inwards into the same plane.
I take two of the said treated strips or semi-circular troughs and a plain or flat
strip of a width equal to the diameter of the tube to be made. The two semi-circular
troughs are placed together mouth to mouth with the plain strip between them the
said plain strip crossing the partially made cylindrical tube as a diameter. The edges
of the plain strip are connected to the inwardly turned flanges of the two semi-circular
troughs by soldering or brazing and the tube thereby finished.
Figure 1 of the accompanying drawing represents in perspective the two semi-
circular troughs and plain metallic strip from which I make a cylindrical tube
containing my improvements.
Figure 2 represents two quadrant shaped troughs and a plain strip from which I
make a D tube containing my improvements.
Figures 3 and 7 represent modifications of my invention hereinafter described:
Figures 4, 5 and 6 represent a portion of the crossing strengthening strip employed
in the modified tube Figure 3 and Figure 8 represents in perspective a portion of the
strengthening strip used in making the tube Figure 7.
The same letters of reference indicate the same parts in the several figures of the
drawing.
I will first describe my invention in connection with the tubing Figures 1 and 2.
I make from thin sheet metal two troughs a, a by rolling, drawing or otherwise but
preferably by the use of the tools or appliances described, represented and claimed in
the Complete Specification of Letters Patent granted to me No. 16799 year 1895, each
of the said troughs a, a having inwardly turned flanges a², a². I arrange the said
troughs a, a together with their mouths or open sides presented to each other and
introduce between the said troughs the plain metallic strip or diaphragm bas illustrated
in Figures 1 and 2. By the soldering or brazing process the said troughs a, a and
strengthening strip or diaphragm b are secured together and the improved tubing
thereby finished.
In order temporarily to secure the two troughs a, a and strengthening strip b
together and thereby facilitate the subsequent soldering or brazing operation I prefer
to make in the middle strip b by a piercing and pressing operation a series of
tongues 2, near each edge of the strip (see Figures 4, 5 and 6) alternate tongues
of which series are pressed in opposite directions so as to project from opposite sides
of the strip as will be seen in the sections Figures 5 and 6, the section Figure 5 being
taken on the line a, a Figure 4 and the section Figure 6 being taken on the line y,
Figure 4. When two troughs a, a are placed against the tongued strip 6 (Figures 4, 5
and 6) the inwardly turned flanges a², a² are engaged with the tongues 62, 6 as will
be best understood by reference to Figure 3 and the parts are thereby held together
until the soldering or brazing operation has been effected.
Or 1 form the strip 6 with channels or corrugations c, c at opposite edges as will
be seen by reference to Figure 8, the open sides of the said channels c, c being turned
outwards. The said strip is engaged with the inwardly turned flanges a², a² of the
troughs a, a by sliding the strip 6 into the tube formed by placing the two troughs a, a
together the channels e, engaging with the adjacent or abutting flanges a³, a² as
seen in Figure 7.

page_text: Where tubes made according to my invention are required to have a bend or
curvature in some part of their length as in the tubes used for making the rear forks
of velocipedes, I prefer to make the required bend or curvature in the troughs or
parts of which the finished tube is to be made and in the strengthening strip before
the said parts and strip are put together. Or I form the bent or curved troughs for
the bent or curved tubes from curved blanks in the way and by the use of the tools
or appliances described, represented and claimed with respect to the curved tubes in
the Complete Specification No. 16799 year 1895 herein before referred to.
The application of my invention to tubes having a figure in cross section other than
cylindrical or D shape differs in no essential respect from its application to a
cylindrical or D tube as herein before described and illustrated.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed I declare that I claim
as my invention :-
First. The improvements in metallic tubing for the frames of bicycles, tricycles
and other velocipedes and for other purposes where lightness and strength are required
herein before described and represented in Figures 1 and 2 of the accompanying
drawing, the said improvements consisting in strengthening tubing composed of two
semi-cylindrical or other shaped metallic troughs having inwardly turned flanges,
by the use of a metallic strengthening strip or diaphragm arranged between the open
sides and turned in flanges of the said troughs the said troughs and strengthening
strip being secured together by soldering or brazing substantially as described and
illustrated.
Secondly. Strengthening tubing composed of two troughs with inwardly turned
flanges by the use of a tongued strengthening strip which is engaged with the
flanges of the troughs before the several parts are soldered or brazed together
substantially as hereinbefore described with respect to Figures 3, 4, 5 and 6 of the
accompanying drawing.
Thirdly. Strengthening tubing composed of two troughs having inwardly turned
flanges by the use of a channelled strengthening strip the said troughs and strip
being engaged together and subsequently soldered or brazed substantially as
hereinbefore described with respect to Figures 7 and 8 of the accompanying
drawing.
Dated the Thirteenth day of January 1897