to such Pipes, and
Year: 1885

page_text: to such Pipes, and a Mode of Manufacturing the Coupling
Piece Employed in Connecting together Two of such Pipes..
I NATHAN THOMPSON of 23 Southampton Buildings in the County of Middlesex,
Marine Engineer do hereby declare the nature of said Invention for IMPROVEMENTS
IN MEANS FOR CONNECTING TOGETHER LEAD AND OTHER SOFT METAL PIPES AND
FOR CONNECTING COCKS AND OTHER ARTICLES TO SUCH PIPES AND A MODE OF
MANUFACTURING THE COUPLING PIECE EMPLOYED IN CONNECTING TOGETHER TWO
OF SUCH PIPES to be as follows:-
The Invention relates Firstly to means for connecting together two or more
lengths of lead or other soft metal pipe. For the purpose of connecting together
two lengths of pipe I employ a tubular coupling piece the bore of which is the
same as that of the pipes to be connected together. The ends of this coupling
piece are tapered and screwed externally to enter the ends of the pipes to be
connected together, the central part of such coupling piece is of larger diameter
than the tapered ends thereof and the ends of such central part are undercut
preferably in the form of parts of hollow cones. The lengths of pipes to be
connected together are enlarged in bore at their ends and the ends of such
enlarged parts are coned on the exterior thereof, to enter the undercut ends of the
central part of the coupling piece. By placing the two tapered screwed ends of
the coupling piece a short distance within the ends of the pipes, and then turning
the coupling piece while the pipes are held stationary the ends of the coupling
piece are screwed into the ends of the pipes which latter are thus caused to
approach the central part of the coupling piece until the coned ends of the pipes
are firmly forced into the undercut parts of the coupling piece; the joint is then
complete.
For connecting together more than two lengths of pipe the coupling piece must
be formed with as many tapered screwed ends and undercut parts as there are
pipes to be connected together, the coupling piece is in such cases rotated to
connect together two lengths of pipe in a line with each other and the other pipe
or pipes must be rotated upon the coupling piece to form the connection.

page_text: The invention relates Secondly to means for connecting cocks and other articles
to lead or other soft metal pipes. For this purpose I form the cock or other
article with a tapered screwed end and an undercut part of similar character to
one half or part of the coupling piece above described and the end of the pipe is
enlarged and shaped as above described, then by turning the tapered screwed end
of the cock or other article within the end of the pipe until the coned end of the
latter is forced into the undercut part of the article the two parts become firmly
connected together.
If desired a set screw can be used to prevent accidental turning of the article
upon the pipe.
In some cases the cock or other article may be formed with two or more tapered
screwed parts to enable it to be connected with as many pipes.
Any suitable packing may be placed between the coned end of the pipe and the
undercut part of the coupling piece or article.
The Invention relates Thirdly to a method of manufacturing the coupling piece
for connecting together two of such pipes.
For this purpose I take a length of brass or other hard metal tube, pass it through
a hollow mandrel of a lathe and fix it by any suitable chuck or holding means,
I then turn or mill down, taper and screw the parts to form the two ends of the
coupling piece, leaving an enlargement between such tapered screwed parts, I also
mill the central enlargement or otherwise form teeth or projections thereon; the
length to form the coupling piece is then cut off.
Another length of tubo of larger exterior diameter than the aforesaid is employed
to complete the central enlargement of the coupling piece, a length is cut off, the
ends thereof are internally coned or undercut and the interior or bore of such piece
is formed to fit the teeth or projections on the exterior enlargement of the piece
before described, the two parts are then placed in correct relative position and
afterwards brazed or soldered together preferably by immersing them.in a bath
of tin.
In cases where two tapered screwed parts of a coupling piece or article are in a
line with each other the screws are formed the one right and the other left handed.
Instead of forming the ends of the pipes and the undercut part or parts of the
coupling piece conical as above described, the ends of the pipe may be cut square
across or they may be internally coned and the enlargement of the coupling piece
may be formed at its ends with short hollow annular cylinders the bottoms of
which may be flat or formed with one or more annular grooves or projections.
NATHAN
THOMPSON.
By Harris & Mills,
23, Southampton Buildings,
Agents.

page_text: to such Pipes, and a Mode of Manufacturing the Coupling
Piece Employed in Connecting together Two of such Pipes.
I NATHAN THOMPSON of 23 Southampton Buildings in the County of Middlesex,
Marine 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 invention is illustrated in the accompanying drawings, in the various figures
of which like parts are marked with similar letters of reference.
The invention relates Firstly to means for connecting together two or more
lengths of lead or other soft metal pipe. This part of my invention is illustrated
at Figures 1 to 9.-For the purpose of connecting together two lengths of pipe a. a.
I employ a tubular coupling piece 6 the bore of which is the same as that of the
pipes a. a. to be connected together. The ends b¹ of this coupling piece bare
screwed externally and are tapered for a short distance or are slightly tapered
throughout their entire length to enable them to enter the ends of the pipes a. a.
to be connected together; the central. part 6 of such coupling piece b is of larger
exterior diameter than the tapered screwed ends b¹ thereof, and the ends b³ of
such central part 6 are according to the arrangement shown at Figures 1 and 2
undercut preferably in the form of hollow cones, as shown more clearly at
Figure 2.
The lengths of pipe to be connected together are enlarged in bore at their ends a³,
a sufficient length to receive the screwed ends b¹ of the coupling piece, and the
ends as of such enlarged parts a¹ are coned on the exterior thereof to enter the
undercut ends 63 of the central part 6 of the coupling piece b as shown at
Figures 1 and 2 or they may be internally coned as represented at Figure 3, and
the enlarged parts of the coupling piece b may be formed to correspond therewith
as shown at Figure 4.
By placing the two tapered screwed ends b¹ of the coupling piece b within the
enlarged ends a¹ of the pipes a and then turning the coupling piece b, while the
pipes a are held stationary, the ends b¹ of the coupling piece bare screwed into
the ends a¹ of the pipes a which latter are thus caused to approach the central
part 6 of the coupling piece b until the coned ends at of the pipes a are firmly
forced into the undercut parts 63 of the coupling piece b; the joint is then complete
as shown at Figure 1. 6 are toggle holes to facilitato the turning of the coupling
piece b.
Instead of forming the ends a³ of the pipes a and the undercut part or parts b
of the coupling piece b conical, as shown in the arrangements represented at
Figures 1, 2, 3 and 4, the ends a² of the pipes à may be cut square across as
represented at Figure 5 and the enlargement 6 of the coupling piece b may
be formed at its ends b³ with short hollow annular cylinders the bottoms of which

page_text: may be flat as shown at Figure 6 or they may be formed with an annular tapered
groove as shown at Figure 7 or with an annular tapered projection as shown at
Figure 8, or if desired they may be formed with more than one such annular
grooves or projections.
For connecting together more than two lengths of pipe a the coupling piece b
must be formed with as many tapered screwed ends b₁ and hollow cylindrical or
undercut parts b³ as there are pipes a to be connected together.
At Figure 9 I have shown in section a coupling piece b of suitable form for
connecting together four pipes. The coupling picce b is in such cases rotated to
connect together two lengths of pipe in a line with each other and the other pipe
or pipes a must be rotated upon the screwed ends b¹ of the coupling piece b to
form the connection.
•
The invention relates secondly to means for connecting cocks and other articles
to lead or other soft metal pipes. At Figure 10 I have represented a cock and
tube connected together according to this part of my invention. For this purpose
I form the cock (or other article) with a tapered screwed end 61 and an undercut
or cylindrical recess 6ª of similar character to one half or part of the coupling
piece b described with respect to the previous figures and the end of the pipe a is
enlarged and shaped as above described, then by turning the tapered screwed end b¹
of the cock (or other article) within the end a¹ of the pipe a until the end of the
latter is forced into the undercut or cylindrical part b³ of the article, the two parts
become firmly connected together.
If desired a set screw can be used to prevent accidental turning of the article with
relation to the pipe.
In some cases the cock or other article may be formed with two or more tapered
screwed parts b¹ to enable it to be connected with as many pipes.
Any suitable packing may be placed between the end a² of the pipe a and the
undercut or hollow cylindrical part 6s of the coupling piece or article.
The invention relates thirdly to a method of manufacturing the coupling piece b
for connecting together two pipes as above described. For this purpose I take a
length of brass or other hard metal tube, pass it through a hollow mandrel of a
lathe and fix it by any suitable chuck or holding means; I then turn or mill down,
taper and screw the parts to form the two ends b' of the coupling piece b leaving
an enlargement between such tapered screwed parts b', I also mill the central
enlargement or otherwise form teeth or projections thereon; the length to form the
coupling piece is then cut off.
At Figures 11 and 12 I have shown a longitudinal section and a cross section
of a length of tube treated as above described.
Another length of tube of larger exterior diameter than the aforesaid is employed
to complete the central enlargement 63 of the coupling piece b, a length is cut off,
the ends thereof are internally coned or undercut or otherwise formed and the
interior or bore of such piece is formed to fit the teeth or projections on the exterior
of the enlargement of the piece shown at Figures 11 and 12.
At Figures 13 and 14 I have shown a longitudinal section and a cross section of
a piece of tubing treated as berein last described.
The two parts shown at Figures 11, 12, 13 and 14, are then placed in correct
relative position and afterwards brazed or soldered together preferably by immersing
them in a bath of tin.
In cases where two tapered screwed ends 61 of a coupling piece b or article are
in a line with each other the screws are formed the one right and the other left
handed.
At Figure 15 I have shown a side view, at Figure 16 a section taken at right
angles to Figure 15 and at Figure 17 an end view of a tool suitable for enlarging
and shaping the ends of the pipe or tube.
The tool is formed with a part c to fit the pipe in order to give steadiness to the
tool in use and with an enlarged part c¹ and tapered shoulder c³ to form the
enlargement a¹ in the pipe a.

page_text: The head of the tool which is of still larger diameter is formed with a square
shoulder c and is provided with an angular cutter c³ so arranged as to cone the end
of the pipe on the inside as shown at Figure 3.
In order to give the desired form to the end of a pipe the tool is first driven into
the pipe until it is arrested by its square shoulder c thus expanding the pipe and
forming the enlargement a' thereon.
The tool is then rotated and the cutter c³ in its course forms the coned or
bevelled edges a² on the inside of the pipe after which the tool is removed leaving
the pipe in the form shown at Figure 3.
It will be understood that by setting the cutter c³ at a suitable angle or by
employing other forms of cutters the tool may be arranged to cone or bevel the end
of the pipe on the outside as shown at Figures 1 and 2, or to form the pipe with
square ends as shown at Figure 5 or with other shaped ends.
In connection with the tool above described I prefer to employ a die or
chamber & such as that shown in section at Figure 18 when forming the enlarge-
ment a¹ of the pipe in order to preserve the exterior form thereof and give a neat
finish thereto.
This die or chamber d is formed in two parts and its interior is the same shape
as the exterior of the enlargement a¹. It is held or clamped in position around
the end of the pipe during the formation of the enlargement by means of a sleeve
or ring, or equivalent device & slidden onto and fitting closely around the outside
of the die, and if desired the acting surfaces of these parts may be made slightly
tapering to facilitate the action of the sleeve or ring d.
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 coupling piece b formed with tapered screwed ends 61 and central enlarge-
ment 6 with hollow conical or cylindrical recesses 6³ to connect together two or
more pipes a formed with suitable enlargements a¹ substantially as herein shown
and described with respect to Figures 1 to 9.
2. The means for connecting cocks and other articles to pipes substantially as
herein shown and described with respect to Figures 1 to 10 and
3. The method of manufacturing the coupling piece 6 for connecting together
two pipes a substantially as herein shown and described with respect to Figures 11,
12, 13 and 14.
NATHAN
THOMPSON.
By Harris & Mills,
23, Southampton Buildings,
Agents.