Improvements in Joints for Cycle Frames and the like.
Year: 1896

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 11 of the Patents, &c. Act, 1883) as required by
the decision of the Chief Examiner of the 5th day of March 1898.
Date of Application, 11th Sept., 1896
PROVISIONAL SPECIFICATION.
Improvements in Joints for Cycle Frames and the like.
I, JAMES RICHARD TRIGWELL, of 146, Brixton Hill, in the County of Surrey,
Cycle Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to the joints of the frames forks etc. of cycles and other
tubular structures, the object being to make a joint, which can be easily completed
without the drawbacks of brazing, which besides frequently burning or spoiling the
metal owing to the relatively high temperature necessary to melt the brazing
metal, requires careful trimming or filing to make the joint presentable, and this
often results in the exceedingly thin tubes being filed through in places.
In carrying out my invention I divide the lugs to which the tubes are to be
connected in one or more places, and provide means for drawing the parts together,
as for example, by screws or bolts passing through projecting portions of the lug,
or by means of an external screw, and coned cap or other similar means.
I find that with the tubes employed in the manufacture of cycles, it is generally
desirable to have some means of resisting the twisting strain to which these joints
are often subject, and for this purpose I connect the two surfaces by sweating or
connecting the two faces together by a metal or alloy, which will fuse at so low a
temperature that it will not damage the metal of which the tubes or lugs are
made, or by cementing with a suitable cement, say for example red lead, white
lead or a combination of the two. Other cements may however be employed for
this purpose.
In making such a joint I prefer to tighten it up while the cement is soft or the
solder in a fluid or semi-fluid condition, after which the joint is allowed to dry or
cool or may be artificially dried by subjecting it to sufficient heat for the purpose.
Other ways of fixing the parts of the joint without brazing are to screw them
together, and screw into the two parts studded screws, which may be rivetted over
if necessary, but have preferably a very fine thread, and are a tight fit. Or a taper
may be employed, the branch of the lug being tapered and the tube tapered to fit
outside that, and a tapered sleeve fitting outside the tube, and screwed at its end
to screw on to a correspondingly threaded portion of the frame lug.
The sweating or cementing may be used with any of these joints.
BOULT & WADE,
Agents for the Applicant.

page_text: Improvements in Joints for Cycle Frames and the like.
I, JAMES RICHARD TRIGWELL, of 146, Brixton Hill, in the County of Surrey,
Cycle Manufacturer, 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 the joints of the frames forks etc. of cycles and other
like tubular articles, the object being to make a joint, which can be easily com-
pleted without requiring to be brazed, which latter operation, besides frequently
burning or spoiling the metal owing to the relatively high temperature necessary
to melt the brazing metal, requires careful trimming or filing to make the joint
presentable, and this often results in the exceedingly thin tubes such as are used
for cycles being filed through in places.
In the accompanying drawings I have shown various forms of joints made
according to this invention.
Figs. 1 and 2 are respectively longitudinal and end elevations of one form of my
invention. In this form the lug A is divided or split longitudinally at a and
furnished with flanges a¹. The end of the tube B is inserted in the lug A and
the parts of the latter are drawn together by means of a screw or bolt a³ passed
through the flanges a¹ on the lug.
In the form shown in Fig. 3, the end of the lug A to receive the tube is externally
screw-threaded as shown at a² and is afterwards divided or split in two or more
places a¹. The tube B is passed into the end of the lug and the parts of the latter
are drawn together by means of a tapering collar C which is internally threaded
so as to engage the screw threads a on the outside of the lug.
In the form shown in Fig. 4, the tube B is externally screw-threaded and
engages with a female thread on the interior of the lug A. The parts are held
rigid by means of one or more studded screws D) the ends of which may if desired
be rivetted over as shown at d, but preferably the screws D have a very fine thread
and are a tight fit.
I find that with the tubes employed in the manufacture of cycles, it is generally
desirable to have some means of resisting the twisting strain to which these joints
are often subject, and for this purpose I connect the two surfaces by sweating or
connecting the two faces together by a metal or alloy, which will fuse at so low a
temperature that it will not damage the metal of which the tubes or lugs are
made, or by cementing with a suitable cement, say for example red lead, white
lead or a combination of the two. Other cements may however be employed for
this purpose.
In making such a joint I prefer to tighten it up while the cement is soft or the
solder in a Huid or semi-fluid condition, after which the joint is allowed to dry
or cool or may be artificially dried by subjecting it to sufficient heat for the purpose.
The sweating or cementing may be used with any of these joints.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I-claim is:--
The improvements in joints for cycle frames and the like substantially as herein
described and illustrated in the accompanying drawings and for the purpose stated.
Dated this 12th day of July 1897.
36, Chancery Lane, London, W.C., Patent Agent for the Applicant.