Improvements in Apparatus for Expanding the Ends of Tubes in Sockets of T Pieces and the like.
Year: 1898

page_text: Date of Application, 5th Apr., 1898
Complete Specification Left, 4th Jan., 1899-Accepted, 4th Feb., 1899
.
PROVISIONAL SPECIFICATION..
Improvements in Apparatus for Expanding the Ends of Tubes in
Sockets of T Pieces and the like.
We, THE METAL TUBE JOINTING COMPANY LIMITED and SAMUEL PALMITER,
Engineer, all of 10, 11 & 12, Walbrook, in the County of London, do hereby declare
the nature of this invention to be as follows:-
This invention relates to apparatus for expanding the ends of tubes in sockets
as for instance for jointing a tube in the side socket of a T or + as in the frame of a
velocipede or other tubular structure.
:
For this purpose a tube expander is fitted at the side of a bar which can be
thrust into one of the opposite openings of a T. or + and then moved laterally so
as to push the expander into the lateral opening. Another bar is then thrust into
the other of the two opposite openings behind the first bar which is thus kept in
position. The conical mandrel of the expander has on it a pinion which is worked
by a reciprocating rack rod made to travel to and fro in the first bar, so that the
mandrel is turned and with it the expanding rollers. The second bar has in it a
sliding rod with an inclined part which, as the rod is pushed inwards, causes a piece
to move at right angles to the bar and so to push forwards the mandrel of the
expander as it revolves. The end of the tube, being inserted into the socket and
the expander being introduced into it as described, on causing the mandrel to turn
to and fro by reciprocating the rack rod, and at the same time advancing the
mandrel by means of the incline on the sliding rod, the end of the tube is expanded
within the socket.
L
1
To
11000
ABEL & IMRAY,
Agents for the Applicants
Improvements in Apparatus for Expanding the Ends of Tubes in
Sockets of T Pieces and the like.
We, THE METAL TUBE JOINTING COMPANY LIMITED and SAMUEL PALMITER,
all of 10, 11 & 12, Walbrook, in the County of London, 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 apparatus for expanding tubes in sockets as for instance
in jointing the frames of velocipedes the chief object of the construction being to

page_text: work a tube expander in the socket at the side of a T piece, or in some such
position, as will be described with reference to the accompanying drawings.
Fig. 1 is a side elevation and Fig. 2 is a plan of the two parts of the apparatus
shewn separate, Fig. 3 is a transverse section on the line 3-3 of Fig. 1, and Fig. 4
is a horizontal central section shewing the parts put together with the expander in
working position.
A is a guide bracket which is fixed on any suitable base or frame and which has
projecting from its one side a boss B. In a transverse hole in this boss is fixed
by means of a hollow screw C the frame of a tube expander E, having three or more
rollers e mounted in the usual way around a taper mandrel 1 on which are cut
teeth to form a pinion d free to revolve within the screw C.
A rod F having on its underside rack teeth engaging with the teeth of d is fitted
to slide to and fro within the bracket A thus causing the mandrel D to revolve
and the rollers e to roll round it. Another bracket G having a boss L has fitted to
slide within it a rod H having a long slot with an inclined division h which is
slotted to engage between shoulders of a piece K bearing against the mandrel D.
In order to expand the end of a tube T into the socket S of a T piece, the boss B
is first inserted into the T piece close to the back or side opposite the socket into
which the tube is to be fixed, which socket is shewn in dotted lines in Fig. 2, and
it is then moved forward so as to advance the expander into the end of the tube
which is in the socket, as shewn in dotted lines in Fig. 4.
The boss L having the rod H retracted is then introduced into the T piece,
behind the boss B until its end meets the face of the bracket A. The rod F being
then moved to and fro causing the expander to revolve, the rod H is gradually
moved forward, its inclined division h advancing the piece K and so pushing the taper
mandrel D forwards. The end of the tube is thus expanded to an extent determined by
an adjustable collar on the rod H reaching the bracket G. The rod H being
then retracted and the boss L withdrawn from the T piece, the boss B is moved
back so as to bring the expander out of the tube, and is then removed from the
T piece.
The brackets A and G may be mounted on any convenient frames such as a lathe
bed on which they can slide, the rod F may be moved to and fro by an eccentric
or crank and the rod H can be gradually advanced by a lever, screw or otherwise,
but as mechanism for moving the rods F and H form no part of this invention, they
are not shewn in the drawings.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed, we declare that what
we claim is:-
:-
Apparatus for expanding a tube in the socket of a T piece or the like constructed
and operating substantially as described with reference to the accompanying
drawings.