An Improved Method of Jointing up Metal Tubes.
Year: 1899

page_text: Date of Application, 28th Jan., 1899
Complete Specification Left, 27th Oct., 1899-Accepted, 2nd Dec., 1899
PROVISIONAL SPECIFICATION.
An Improved Method of Jointing up Metal Tubes.
I, WILLIAM HILLMAN, of 7, The Quadrant, Coventry, in the County of Warwick,
Engineer, do hereby declare the nature of this invention to be as follows:--
My improved joint is designed to joint up the tubes in velocipedes and the
frames of motor cars but is applicable for other purposes, the object being to
so construct a machine that it may be taken to pieces for packing or other pur-
poses.
In jointing up a velocipede frame composed of my improved double tube as
described in the Specification of Patent No. 4890 of the year 1897, and of cast
or stamped connecting lugs, I fit a pair of bushes or liners in each end of such
of the tubes as it is desired to make detachable and immerse their ends in a flux
and then in molten solder to thoroughly cement the tube ends and liners.
When cold and cleaned off I insert the tubes in the lugs which are bored to
receive them.
I then bore a comparatively small hole through both lugs and tubes and exactly
between the two cylinders forming the said double tube and countersink both
sides.
I then fit into the said hole a screw bolt fitted with a suitable nut which when
tightened up draws the metal of the lugs tightly round the two cylinders of the
tubes thus forming a rigid joint in every direction but one easily detached.
In carrying out this invention with weldless tube I form the tubes externally
to the same shape approximately as the said double tube and then proceed as
above described.
Dated this 28th day of January 1899.
An Improved method or Jointing up metal Tubes.
I, WILLIAM HILLMAN, of 7, The Quadrant, Coventry, in the County of Warwick,
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:-
My improved joint is designed to joint-up or connect the tubes in velocipedes
and the frames of motor cars, but is applicable for other purposes, the object

page_text: being to so construct the frame of a machine that it may readily be taken to
pieces for packing or other purposes.
I will describe my invention as applied to a velocipede frame of the usual
construction.
Fig. 1 is an elevation of the lug at the top of the head and short lengths of
tubes inserted therein.
Fig. 2 is a sectional rear view and Fig. 3 is a plan of the same.
Figs. 4 and 5 are two views at right angles of a bolt used for connecting up
the frame, and Fig. 6 is an elevation of the nut used therewith.
Fig. 7 is an elevation of the seat pillar lug with short lengths of tubes inserted
therein and upper portion of back stay attached thereto.
Fig. 8 shows a section of the tube for which I obtained Letters Patent No. 4890
of the year 1897.
Fig. 9 is a section of one of the liners employed by me in carrying this invention
into effect, and Fig. 10 is a plan or side view of the same.
Figs. 11 and 12 are respectively a plan and elevation of a bottom bracket and
crown for the back fork having short lengths of tubing fitted therein.
Fig. 13 is a front view of the crown for the back fork.
Fig. 14 is an elevation of the end of the back fork with lower end of back
stay attached thereto.
My invention relates more particularly to a method of jointing-up tubes con-
structed in accordance with the Specification of the said Letters Patent No. 4890
of 1897, but it is also applicable for jointing-up two separate tubes placed side
by side.
As shown in the drawings each of the lugs A. is formed with two sockets a a
bored to fit my improved double tubing b, or two separate tubes. These sockets a a
are so bored as to just intersect each other and the metal is somewhat cleared away
at the intersection.
In jointing-up a velocipede frame composed of my improved double tube b,
shown in section in Fig. 8. and of cast or stamped connecting lugs bored as
above described, I fit a pair of bushes or liners in each end of such of the
tubes as it is desired to make detachable, and I immerse the ends of such
tubes in a flux and then in molten solder to thoroughly cement the tube ends
and the liners c. The liners are preferably formed of sheet metal bent to the
section shown in Fig. 9, thereby forming an interior web c¹ which presses against
one side of the web of the tube b, whilst the edge of such liner lies against
the other side of the web b¹. When cold and cleaned off I insert the tubes b
in the lugs A which have been bored to receive them. I then bore a comparatively
small hole a through the lugs A and tubes bexactly between the two cylinders
forming the said double tube b, and I countersink one end of said hole to fit
the conical portion of the nut d. A screw bolt e having a narrow flat head e¹
rounded on its under side to fit the groove formed along the lugs A at the
junction of the two sockets a, is then passed through the hole a' and the nut d
is tightened up. This nut, by the aid of the flat head el, draws the metal of the
two sockets a tightly round the two inserted cylinders of the tube b, thus causing
the lug to embrace the tubes tightly and relieve the pin or bolt e from all
transverse strain.
By these means a rigid joint is formed which, however, may be readily detached
when desired. The hole a also passes across one side of cach liner c, thus giving
the bolt e a larger bearing surface than if it merely passed through the hole in
the tubes b.
It will be seen that the lug shown in Fig. 1 is formed to fit a double tube b
or two separate tubes passing therefrom rearwardly in a horizontal direction,
but it is also formed to fit a single tube * to act as the exterior of the head.
and this latter tube is soldered or brazed in position. I have not thought it.
necessary to show the lug forming the lower portion of the head as it is practically
a repetition of the lug shown in Fig. 1,

page_text: The tube is soldered or brazed into its lug as shown in Fig. 7, and receives
the seat pillar made of two separate tubes.
The hole shown in Fig. 3 is produced by the tools used in boring the
sockets a passing through the interior wall of the casting or stamping forming
the lug.
The upper back fork or stay 63 may be connected to the seat pillar lug by a
bolt a passing through the eye al in the usual manner, as shown in Fig. 7.
The back stay and the back fork bt are preferably brazed into their lugs as
shown in Figs. 7, 11, 12 and 14.
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
1. A joint for jointing or connecting up double tubes consisting of a lug having
two parallel intersecting sockets bored to fit such tubes, a transverse hole bored
through said lug and tubes intermediate of such sockets, a bolt passed through
said hole, and a nut to screw on to the bolt, substantially as set forth.
2. In a joint for jointing or connecting up double parallel tubes, the combination
of a lug having two parallel intersecting sockets bored to fit such tubes, a transverse
hole bored through such lug intermediate of the two sockets, a countersunk end
to such hole, a bolt passed through such hole having a head to fit the groove in
the lug between the sockets, and a nut having a conical head to fit the end of
the countersunk hole, substantially as set forth.
3. In a joint for jointing or connecting up double parallel tubes, the combina-
tion of a lug having two parallel intersecting sockets bored to fit such tubes,
liners soldered in the ends of such tubes, a transverse hole bored through such
lug, tubes and liners intermediate of the two sockets, a countersunk end to such
hole, a bolt passed through such hole having a narrow head to fit the groove in
the lug between the sockets, and a nut having a conical head to fit the end of the
countersunk hole, substantially as set forth.
Dated this 27th day of October 1899.
HARRIS & MILLS,
23, Southampton Buildings, London, W.C., Agents.