Improvements in Joints for Steam or other Tubes.
Year: 1892

page_text: Date of Application, 20th Jan., 1892
Complete Specification Left, 31st May, 1892-Accepted, 9th July, 1892
PROVISIONAL SPECIFICATION.
Improvements in Joints for Steam or other Tubes.
I SAMUEL LONGMORE, of 15 Holly Hedge Road, West Bromwich, Stafford-
shire, Tube Works Manager, do hereby declare the nature of this invention to be
as follows:
This invention relates to an improved arrangement of joint for steam, water,
chemical, gas or other tubes where it is desirable that no leakage may take place,
and particularly under heavy pressures.
It consists as follows:-The ends of the two tubes to be connected are externally
screwthreaded as usual. Their ends are faced flat, and further coned inwards upon
their inside, leaving an annular ring of end surface, about half the thickness of the
metal of the tube, such surface preferably being undercut a little.
Again. A short cylindrical collar is now provided (generally of the same metal
as the tubes themselves) and whose inside diameter agrees with the internal of the
tube, while its outside diameter permits its being easily passed into the socket.
Each end of this collar is formed conical, (externally), corresponding to, and fitting
in the internally coned ends of the said tubes, and leaving an annular ring of
surface at the top of each of such coned parts, which is also preferably undercut a
little, which corresponds to the end annular surface of the tubes. Two rings of
india-rubber, asbestos, lead or other soft metal, or other suitable material, are now
provided and passed one on to each of the coned parts of the collar up to and
against the annular surface thereon.
.
In making the joint, the ordinary socket is now screwed part way on to the one
tube, the collar is next passed in, and then the other tube screwed home.
In so
doing, the two rings are pressed firinly between the annular surfaces upon the tubes
and those upon the collar, while the conical parts upon the said collar prevent the
possible escape by squeezing, of the rings into the interior of the tube. The
internal conical surfaces of the tubes also are forced upon the external conical
surfaces of the collar, and thus an excellent joint is made, which will effectually
resist very high pressures, and at the same time is one that can be readily made or
unmade at will.
As a modification of this my invention, 1 may in some instances dispense with
the loose rings, and make the collar itself of a metal or other material softer than
the tubes, so that by screwing up the tubes, the annular ends of the said tubes may
force themselves upon the collar. Or in other cases the said collar may be formed
in one with, and central within the socket, the rings and the ends of the tubes being
formed and manipulated as before stated; this latter arrangement however is
somewhat troublesome to make.
I may further modify the sectional form of this collar, by reversing it, that is, I
may cone the outside of the ends of the tubes, and leave the flat annular ring
surface at the inner edge of the tube, and hence the conical surfaces of the collar
would be internal, with the flat annular surface at its inner diameter.
Dated this 19th day of January 1892.
CHARLES T. POWELL,
Applicant's Agent.

page_text: COMPLETE SPECIFICATION.
Improvements in Joints for Steam or other Tubes.
I, SAMUEL LONGMORE, of 15 Holly Hedge Road, West Bromwich, Stafford-
shire, Tube Works Manager, 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 an improved arrangement of joint for steam, water,
chemical, gas, or other metal tubes where it is desirable that no leakage may take
place, and particularly under heavy pressure.
It consists as follows:-The ends of the two tubes to be connected are externally
screwthreaded as usual. Their ends are faced flat, and further coned inwards upon
their inside, leaving an annular ring of end surface, about half the thickness of the
metal of the tube, such surface preferably being undercut a little.
Again. A short cylindrical collar is now provided (generally of the same metal
as the tubes themselves) and whose inside diameter agrees with the interual of the
tube, while its outside diameter permits its being easily passed into the socket.
Each end of this collar is formed conical, (externally), corresponding to, and fitting
in the internally coned ends of the said tubes, and leaving an annular ring of
surface at the top of each of such coned parts, which is also preferably undercut a
little, which corresponds to the end annular surface of the tubes. Two rings of
india-rubber, asbestos, lead or other soft metal, or other suitable material, are now
provided and passed one on to each of the coned parts of the collar up to and
against the annular surface thereon.
In making the joint, the ordinary socket is now screwed part way on to the one
tube, the collar is next passed in, and then the other tube screwed home.
In so
doing, the two rings are pressed firmly between the annular surfaces upon the tubes
and those upon the collar, while the conical parts upon the said collar prevent the
possible escape by squeezing, of the rings into the interior of the tube. The
internal conical surfaces of the tubes also are forced upon the external conical
surfaces of the collar, and thus an excellent joint is made, which will effectually
resist very high pressures, and at the same time is one that can be readily made or
unmade at will.
As a modification of this my invention, I may in some instances dispense with the
loose rings, and make the collar itself of a metal or other material softer than the
tubes, so that by screwing up the tubes, the annular ends of the said tubes may
force themselves upon the collar. Or in other cases the said collar may be formed
in one with and central within the socket, the rings and the ends of the tubes being
formed and manipulated as before stated; this latter arrangement however is
somewhat troublesome to make. I may further modify the sectional form of this
collar, by reversing it, that is, I may cone the outside of the ends of the tubes, and
leave the fat annular ring surface. at the inner edge of the tube, and hence the
conical surfaces of the collar would be internal, with the flat annular surface at its
inner diameter.
I will now proceed to more particularly describe this my invention by the aid of,
the accompanying illustrated sheet of drawings upon which are figures and letters
of reference.
Fig. 1, is a part sectional elevation of my improved steam joint.
Figs. 2, 3 & 4, are part sectional elevations of modifications of my invention.
Fig. 5, shows the application of my invention to an elbow or other than socket
joint.
A, A, are the ends of the two tubes to be connected which are externally screw-
threaded as usual, and their ends are faced flat at B, and further coned inwards
at C, upon their inside, thus leaving an annular ring of end surface. D, is a
cylindrical collar, whose inside diameter agrees with the internal diameter of the
3

page_text: tube, while its outside diameter permits of its being easily passed into the socket E;
this collar D, is further formed with external conical surfaces F F, corresponding
with and fitting into the coned surfaces C C, upon the tubes A A.
Upon this collar are now passed, one on to each side of the coned parts FF, and
up-to and against the annular surfaces G G, rings H H, of india-rubber asbestos,
lead, or other soft metal, or other suitable material.
In order to make this my improved joint, the socket E, is first screwed part way
on to one of the tubes A, the collar D, with the rings H H, thereon, is now passed
into the socket E, and then the other tube A., is screwed home. In so doing the
two rings HH, are pressed firmly between the annular surfaces G G upon the
collar D, while the conical parts FF, upon the collar D, prevents the possible
escape by squeezing, of the rings H H, into the interior of the tube.. The internal
conical surfaces CC, of the tubes A A, are also forced upon the external conical
surfaces FF, of the collar; and thus an excellent joint is made, which will
effectually resist very heavy pressures, and at the same time is one that can be
readily made or unmade at will.
In the modification shown in Fig. 2, I dispense with the rings H. H, and form
the collar D', of lead or other soft metal. Thus upon screwing the tubes A' A',
into the socket E, the annular ends B' B', of the tubes force themselves into and
upon the collar D', thus again forming a very strong high pressure joint.
In Fig. 3, is a further modification shown, in which the collar D, is formed in
one with the socket E. In this case the rings H1 H', are inserted as shown, and
the ends of the tubes A2, A2, formed similarly as before described, which again
when screwed home affords an effectual joint.
Also in Fig. 4, I have shown a further modification, in which the collar D³ is
reversed. Thus the conical surfaces F1 F1, and also the angular surfaces G¹ G¹,
would be internal, and the coned surfaces Ci C, of the tubes A³ A³, would in this
case be on the outside, and the annular ring surface B2 B2, are formed at the inner
edges of the tubes As A³. These annular ring surfaces B2 B32, of the tubes A³ A³,
are further slightly coned outwards as shown, which prevents the india-rubber
ring H2, having a tendency to escape by squeezing into the interior of the tube.
Fig. 5, is a modification in which I have shown the application of my improved
joint to an elbow piece E. In this case the collar D, is formed with the conical
surface F on one side only, and is screwthreaded on its external diameter, to
permit of its being screwed into the elbow piece E, the rubber ring H³, being then
passed on to the conical surface 2 of the cone D, up to and against the annular
surface G2, the tube A', is then screwed home, thus again forming the joint as
before described.
It will be further seen that this my improved joint may in a similar manner also
be applied to tee pieces, four way and other similar connections or fittings without
departing from the nature of my invention.
Having now particularly described and ascertained the nature of this my said
invention, and in what manner the same is to be performed, I declare that what I
claim is :--
1. The combination in a pipe joint with the socket E, and pipes A, A, having
their ends shaped as shown and described, of the conical collar D, with the
rings HH, constructed and operated as hereindescribed and illustrated in Fig. 1.
2. The modified combination in a pipe joint with the socket E', pipes A' A', of
the collar D¹, constructed and operated as herein described and illustrated in
Fig. 2.
3. The modified combination in a pipe joint, with the pipes A³ A³, of the
combined socket E, and collar D³, constructed and operated as herein described
and illustrated in Fig. 3.
4. The modified combination in a pipe joint, with the socket E, and pipes A³, A³,
of the reversed conical collar D³, with or without rings H³, H³, constructed and
operated as herein described and illustrated in Fig. 4.

page_text: 5. The modified combination in a pipe joint of the part E, and pipe A, of the
collar D, and ring H', constructed and operated as herein described and illustrated
in Fig. 5.
Dated this 30th day of May 1892 ·
CHARLES T. POWELL,
Applicant's Agent.