Improvements in Apparatus or Machinery for Forming Sockets on Tubes or Pipes of Wrought Iron, Steel, or other Metal.
Year: 1898

page_text: Improvements in Apparatus or Machinery for Forming Sockets on
Tubes or Pipes of Wrought Iron, Steel, or other Metal.
We, THE STANDARD WELDLESS TUBE AND CYCLE COMPONENTS LIMITED, of
Wharf Street, Aston, Birmingham, in the County of Warwick, and 33, Victoria
Street, in the County of London, do hereby declare the nature of this invention
(a communication to us from abroad by Rudolf Chillingworth, of No. 1. Fabrik-
strasse, Nuremburg, in the Empire of Germany, Metal Stamper) to be as follows:--
This invention refers to improvements upon an invention by Rudolf Chilling-
worth, patented in England the 23rd April, 1895, No. 8050, and assigned to the
Standard Weldless Tube & Cycle Components Limited by deed dated the 23rd
day of March 1897 and registered at the Patent Office the 15th day of April 1897.
The object of the present invention is to form by improved means or devices
as hereafter described. sockets on wrought iron, steel, or other metal tubes or
pipes from the metal itself of which the tube or tubes is or are composed, and the
present invention is designed particularly for the manufacture of sockets upon
such tubes as are suitable for water or fire tube boiler tubes, such as the tubes
now used in the well known "Belleville" boilers, but of course the invention is
applicable for the manufacture of projecting sockets on tubes such as would be
suitable for many and various purposes.
According to this invention the tube upon the curved surface of which a pro-
jecting tubular socket is to be formed. is firstly treated as described in the afore-
said Specification of Patent 8050/95, that is to say, a protuberance, or swelling is
formed at the point where the socket is to be produced, by operating on the tube
while in a heated state, by means of a core passing through the tube, the projecting
ends of the core being suitably supported. The core has a laterally proiecting
part fitted or formed thereon, of a shane suitable for producing the required pro-
tuberance, and a press is emploved. the stamp of which is made with a suitable
recess to act exteriorally upon the heated tube, whereby the latter is formed over
the projecting part of the core and a rounded protuberance is produced. while the
shape of the body of the tube so acted upon is preserved by reason of the support
afforded thereto by the core aforesaid.
A hole is then drilled or otherwise produced about the anex of the protuberance.
A heated tube having such a lateral protuberance with the hole made therein as
stated. is then. according to this invention, enclosed within a divided casing which
fits the tube externally. and such casing has a lateral circular passage into which
the already formed protuberance projects somewhat.
The lower end of the casing containing the tube is placed into a ring located on
the bed of the press, while unon the upper end of the casing a second ring is
adiusted. these rings securely holding the parts of the divided casing together.
Prior to placing the casing into the bed ring an upstanding uiding die or
plug is fitted centrally therein, so that when the casing is in position the said

page_text: plug extends axially within the tube near to, or up to, the lower part of the lateral
socket which is to be formed.
A hard steel ball or the like is then placed within the tube and is supported
upon the end of the plug aforesaid whereby it is maintained opposite to the pro-
tuberance from which the socket is to be formed.
A driving tool is then employed composed of a plunger which can be forced
into the open end of the tube and this driving tool is formed at its acting end into
an inclined plane, the inclination being at a suitable angle with the axis of the
tube.
Upon the driving tool being forced downwardly the inclined end acts upon the
steel ball and forces the latter laterally against the concavity of the protuberance,
whereby the latter is extended and formed into a tubular socket.
BREWER & SON,
London and Leeds. Agents for the Applicants.
Improvements in Apparatus or Machinery for Forming Sockets on
Tubes or Pipes of Wrought Iron Steel, or other Metal.
We, THE STANDARD WELDLESS TUBE AND CYCLE COMPONENTS LIMITED, of
Wharf Street, Aston, Birmingham, in the County of Warwick, and 33, Victoria
Street, in the County of London, do hereby declare the nature of this invention
(a communication to us from abroad by Rudolf Chillingworth, of No. 1, Fabrik-
strasse, Nuremburg, in the Empire of Germany, Metal Stamper), and in what
manner the same is to be performed to be particularly described and ascertained
in and by the following statement:-
This invention refers to improvements upon an invention by Rudolf Chilling-
worth, patented in England the 23rd April, 1895. No. 8050, and assigned to the
Standard Weldless Tube & Cycle Components Limited by deed dated the 23rd
day of March 1897 and registered at the Patent Office the 15th day of April 1897.
The object of the present invention is to form by improved means or devices
as hereafter described, sockets on wrought iron, steel, or other metal tubes or
pipes from the metal itself of which the tube or tubes is or are composed, and the
present invention is designed particularly for the manufacture of sockets upon
such tubes as are suitable for water or fire tube boiler tubes, such as the tubes
now used in the well known "Belleville" boilers, but of course the invention is
applicable for the manufacture of projecting sockets on tubes such as would be
suitable for many and various purposes.
In order that this invention may be readily understood we will now describe
same with reference to the accompanying drawings, whereon is shewn so much of
the improved apparatus employed in the aforesaid manufacture as will be necessary
for the purpose of this specification. Fig. 1 is a vertical sectional elevation shew-
ing the tube to be operated upon in position. Fig. 2 is a plan view of the parts
shewn at Fig. 1. Fig. 3 is a view similar to Fig. 1 but shewing the tube with
the socket formed thereon, and Fig. 4 is a horizontal section on the line X Y of
Fig. 3. Fig. 5 is a view shewing a modification.
Similar letters of reference indicate like parts in the several figures of the
drawing.

page_text: According to this invention the tube A upon the curved surface of which a
projecting tubular socket (such as A¹ Fig. 3) is to be formed, is firstly treated as
described in the aforesaid Specification of Patent No. 8050/95, that is to say, a
protuberance or swelling, such as A Fig. 1, is formed at the point where the
socket is to be produced, by operating on the tube A. while in a heated state, by
means of a core passing through the tube, the projecting ends of the core being
suitably supported. The core has a laterally projecting part fitted or formed
thereon, of a shape suitable for producing the required protuberance, and a press is
employed, the stamp of which is made with a suitable recess to act exteriorally
upon the heated tube whereby the latter is formed over the
jecting part of the core and a rounded protuberance is produced, while
the shape of the body of the tube so acted upon is preserved by reason of the sup-
port afforded thereto by the core aforesaid.
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A hole is then drilled or otherwise produced about the apex of the protuberance.
A heated tube A having such a lateral protuberance A¹, with the hole A2 made
therein as stated, is then, according to this invention, and as shewn at Fig. 1,
enclosed within a divided casing B which fits the tube externally, and such casing
has a lateral circular extension 131, into the interior of which the already formed
protuberance A projects somewhat.
The lower end of the casing B containing the tube is placed into a ring C located
on the bed of the press, while upon the upper end of the casing B a second ring C¹
is adjusted and these rings securely hold the parts of the divided casing B together.
Prior to placing the casing B into the bed ring C an upstanding guiding die or
plug D is fitted centrally therein, so that when the casing B is in position the said
plug D extends axially within the tube A near to, or up to, the lower part of the
lateral socket which is to be formed.
A hard steel ball E or the like is then placed within the tube A and is sup-
ported upon the end of the plug D aforesaid whereby it is maintained opposite to
the protuberance A", Fig. 1, from which the socket is to be formed.
A driving tool is then employed composed of a plunger I which can be forced
into the open end of the tube A and this driving tool is formed at its acting end
into an inclined plane, the inclination being at a suitable angle with the axis of
the tube A.
Upon the driving tool F being forced downwardly the inclined end acts upon the
steel ball E and forces the latter laterally against the concavity of the pro-
tuberance A, Fig. 1, whereby the latter is extended and formed into a tubular
socket as shewn at Fig. 3.
The upstanding plug D may be, and generally is, partially cut away as shewn in
the drawings at D₁, and thereby allows the inclined surface of the plunger F
to be formed with a more gradually acting angle, the lower end of the plunger
when forced downwards, entering the recess formed by the said cutting away of
the plug D.
It will be understood that the angle of the acting end of the driving plunger F
is to be formed according as circumstances may require and in some cases the
acting end of the said plunger D) may be formed with a curved inclination instead
of a flat surface; moreover the upper end of the plug D may be also curved.
The ball E is shewn as a sphere, but it is not absolutely necessary that it should
be of this exact configuration as it might be formed with a flat or curved surface
to receive the pressure of the driving tool F.
It is quite clear in a case where it is desired to produce a socket of greater length
than half diameter of the ball, that after the socket has been once expanded by the
first action of the ball as at Fig. 3, a further travel of the ball may be produced by
the intervention between the ball and the incline of the upper plunger, of a separate
wedge piece or block G, upon which the inclined surface of the upper plunger will
act to drive the said block and ball and thereby produce a socket longer than half
the diameter of the ball, and as shewn by the sectional view at Fig. 5.

page_text: 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:―
1. The improved apparatus or machinery for forming sockets on tubes or pipes
of wrought iron, steel, or other metal, composed of a hollow divided casing, the
parts of which are brought together to enclose the tube to be operated upon, a
fateral tubular extension on the casing within which the socket is to be produced,
and means for holding together the parts of the said divided casing, in combination
with a lower fixed die or plug extending upwards axially within the tube and
terminating near to the lower part of the lateral socket which is to be formed,
a hard steel ball, pellet, or the like, supported within the tube upon the end of the
plug aforesaid, and an upper plunger formed with an inclined, plane, or curved,
lower surface adapted when forced downwards to act on the ball aforesaid and
force the latter against a prepared part of the tube opposite the lateral tubular
extension, to form the required socket, substantially as set forth.
2. The improved apparatus or machinery for forming sockets on tubes or pipes
of wrought iron, steel, and other metal, composed of a hollow divided casing hav-
ing a lateral tubular extension and adapted to receive and enclose a tube upon the
circular wall of which a rounded protuberance has ben previously produced, a hole
having been formed in same at the apex of the protuberance, the latter projecting
somewhat into the said lateral extension of the casing, a lower stationary plug
entering the tube to support a hard steel ball or the like at the level of the lateral
tubular extension, and a curved or wedge ended upper plunger to force the ball
laterally against the concavity of the protuberance, and whereby the latter is
extended and the tubular socket formed within the lateral extension of the casing,
substantially as described and shewn.
3. The construction and arrangement of parts composing the improved apparatus
or machinery for forming sockets on tubes, or pipes, of wrought iron, steel, or
other metal, all combined and acting substantially as and for the purposes described
and illustrated with reference to the accompanying drawings.
Date this
1. 11
1000
BREWER & SON,
London and Leeds, Agents for the Applicants.