Improvements in Sockets used in Jointing Tubes by Fluid Pressure.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Sockets used in Jointing Tubes by Fluid Pressure.
I, ALEXANDER DOUGLAS BARTY, of 45, Lundorne Road, Charlton, S.E., Engineer,
do hereby declare the nature of this invention to be as follows:-
In view of the fact that a satisfactory job cannot be made of recesses or grooves
formed on the inside of sockets by the process of casting and as those recesses
or grooves are difficult and expensive to machine, I propose to make the sockets
other than continuous by leaving holes extending thro the metal of the sockets
so that the tubes can be pressed into these holes but still kept from bursting by
coming in contact with the jig, or die that supports the socket, I claim that I
can by this means make the sockets much thinner and lighter, and much cheaper
as the holes could be cast into the sockets sockets or in the case of drop forgings they
could be blocked into the sockets. I also propose to make the jig or die that supports
the socket and tube clear of tubes at the ends of the sockets for by doing so I allow
the tube to expand and thus assists to prevent the socket from turning. I also
round the inside edges of the sockets at the ends & so to allow the tube to expand &
so strengthen the joint.
I may make the holes in the sockets heart shaped but I do not bind myself in
this respect they can be of any shape ornamental or otherwise.
I also claim that the tubes can be got out more easily than in the other case
by just pressing in the tube through the hole.
Improvements in Sockets used in Jointing Tubes by Fluid Pressure.
I, ALEXANDER DOUGLAS BARTY, late of 45, Lundorne Road, Charlton, Kent,
now of 93, Church Lane, Charlton, Kent, 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; —
This invention relates to the production of cycle autocar and other framings,
usually made of a number of thin tubes, united together by sockets or lugs. It is
intended to apply to the process whereby the said sockets and tubes are united
together by fluid pressure.
In view of the fact that a satisfactory job cannot be made of recesses or grooves,
formed on the inside of the sockets by the process of casting, and as those recesses
033

page_text: or grooves are difficult and expensive to machine, I will make the sockets other
than continuous, by leaving holes extending through the metal of the sockets, so
that, when the fluid pressure is applied, the tubes will be pressed into those holes,
but still kept from bursting by coming in contact with the walls of the recess in
the jig or mould supporting the socket.
Figure No. 1 of the accompanying drawings represents one of the sockets or lugs
of a cycle frame shewn in section with the tube expanded into place. The socket
is marked A and the tube B, and in this particular case it is shewn with oval
holes C, but holes can be made any shape, ornamental or otherwise.
It is intended also, to make the jig or mould (if found necessary) which otherwise
supports the tube and socket clear of the tube, or not supporting the tube, at the
area marked D D shewn cross-hatched (Figures No. 1 and No. 2), that is, the
recesses in the jig or mould can be made to the same diameter, say J, as the outside
of the socket A, for a short distance, say F, beyond the points of the diamonds G of
the socket A, Figure No. 1. In Figures No. 1 and No. 2 the sockets are shewn
with two diamonds, or are what is known as birds-mouthed, but it is not binding to
this form of socket, but socket can have any number of diamonds or other points
as is deemed necessary..
It is preferred also to round the inside edges of the sockets at ends, and also at
the edges of holes C, in order to secure as far as possible a close joint when the tube
is pressed into place.
Figure 1 of the accompanying drawings is a view of a socket A with tubes B
expanded into holes C.
Figure 2 is a view shewing socket A enclosed in jig or holder E.
Figures 3 and 4 are sectional end views of sockets and tubes taken through
holes C with tubes B expanded into place.
Figures 5 and 6 are sectional end views of sockets and tubes taken through
holes C before tubes are expanded.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I claim
is:-
Claim No. 1. A socket A with holes C extending through the metal of the
socket, for the purpose described.
Claim No. 2. A socket A with holes C extending through the metal of the socket,
and having the inside edges of those holes rounded, for the purpose described.
Claim No. 3. A socket A with holes C extending through the metal of the socket
in combination with a diamond or birds-mouthed end; into the recesses D D of
the diamonded or birds-mouthed end of socket, the tube is forced flush with the
outside diameter of the said socket.
Claim No. 4. A combination of a socket such as A with holes such as C or any
other shape found necessary extending through the metal of the socket; with the
diamond or birds-mouth end such as G with a tube expanded by fluid pressure into
those holes C and diamond or birds-mouthed recesses G; with the tube also
expanded to diameter J for a short distance say F beyond the points of the
diamonds G of the socket A for the purpose described.
Dated this 31st day of December 1898.