Improvements in Pipe Couplings.
Year: 1895

page_text: Date of Application, 7th Mar., 1895-Accepted, 24th May, 1895
[Communicated from abroad by JOHN ANDERSON, of Portland, County of
Middlesex, State of Connecticut, United States of America, Master
Plamber.]
Improvements in Pipe Couplings.
1, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent
Agents, 45 Southampton Buildings, in the County of Middlesex, do hereby
declare the unture 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 improvement in pipe couplings, the object being to
produce a simple, compact, durable, effective and convenient device for coupling
two lead pipes, or one lead pipe and one of iron or other non-expansible metal.
With these ends in view, my invention consists in a pipe coupling comprising a
joint-piece having an inclined annular bearing face and a hub projecting beyond
the same and of smaller diameter, a packing ring applied to the said hub, and
having its outer face inclined to agree with the inclination of the bearing face of
the joint-piece, a coupling member having the inner ond of its longitudinal bore
flared, and a collar engaging with the said member for drawing the pipe which it
fits upon, over the said ring and the inclined face of the joint-piece. My invention
further consists in a pipe coupling having a joint-piece, the enlarged central portion
of which has two oppositely inclined annular bearing faces, and which has two
oppositely projecting hubs extending beyond those faces, and smaller in diameter
than the same, two packing rings respectively applied to the said hubs, and having
their outer faces inclined to agree with the inclination of the said bearing faces.
two coupling members, the outer onds of the longitudinal bores whereof are flared,
and one of which has exterior screw threads and the other a coupling shoulder, and
an interiorly threaded collar taking into the said threads and having an inwardly
projecting coupling flange to coact with the said shoulder.
In the accompanying drawing,
Figure 1 represents a view in side elevation of one form which a pipe coupling
constructed in accordance with my invention may assume.
Figure 2n view thereof in central longitudinal section.
Figure 3, a view of one of the modified forms which the invention may take.
In carrying out my invention, as shown in Figs. 1 and 2 of the drawings, I
construct a joint-piece having the periphery of its enlarged central or body
portion A, shaped to form two oppositely inclined ammular bearing faces A'A'.
The said joint-piece is also constructed with two corresponding, oppositely
projecting hubs A' A', smaller in diameter than its central or body portion, and
designed to respectively receive packing rings C C, made of rubber or other
equivalent material, adapted in internal diameter to fit snugly over the said hubs,
and having their outer faces beveled to agree with the inclination of the bearing
faces A' A' before mentioned, than which they are preferably slightly larger in
diameter. The joint-piece also has a central longitudinal bore A', which permits
the free passage of water through it in one direction or the other. The flaring
inuer ends of the pipes B B are drawn over the inclined outer faces of the packing
rings, and also over the inclined bearing faces of the joint-piece, by means of
coupling members D D', the inner ends of the longitudinal bores of which are flared;
27

page_text: The coupling member D. is constructed at its inner end with a wide, 'exteriorly
threaded shoulder d, to receive the interiorly, threaded coupler E, which is
constructed with an inwardly extending coupling flange e, which coacts with an
ontwardly projecting annular coupling shoulder d, formed at the inner end of the
coupling member D'. The said coupler E, is provided with a central band of
gripping faces E, adapting it to be gripped by a wrench, but its adaptation to be
60 gripped may be varied as desired. It will be apparent that by rotating the
coupler, the two coupling members may be drawn together through the coaction of
the said screw threads and the flange e and shoulder d': For the purpose of
preventing the coupling members from rotating and twisting the ends of the lead
pipe off while the coupler E is being rotated for the purpose of drawing them
together, I preferably construct the exterior faces of the outer ends of the coupling
members with gripping faces, adapting them to be gripped by wrenches. In
coupling the two members together by means of this coupler, it is slipped over the
coupling member D', from the outer end thereof, for the engagement of its inwardly
projecting coupling flange e with the outwardly projecting annular coupling
shoulder d' of the said member. The internal screw threads of the coupler are also
engaged with the external screw threads of the coupling member D, after which
any turning of the coupler in the right direction will draw the two coupling
members together.
In using my improved pipe coupling when constructed as described, the respective
coupling members are slipped over the ends of the two lead pipes which it is desired
to unite the ends of the said pipes are then expanded, by means of a wooden plug,
or any other approved. instrument, until they fill the coupling members, as clearly
seen in Fig. 2 of the drawings. The joint-piece with the packing rings fitted to it
is then introduced into the expanded ends of the lead pipes after which the coupling'
members are firmly coupled together by means of the coupler, which thus draws the
expanded ends of the lead pipes into such close contact with the packing rings and
bearing faces of the joint-piece that a very tight joint is secured. The joint-piece
and the packing rings form the real boud between the two pipes, and it is immaterial
whether their ends abut
The joint is necessarily a very tight joint, on
account of the extended area of contact between the joint-piece and the packing
rings and the expanded ends of the pipe joined. If any leakage is observed in the
oint, it is only necessary to manipulate the coupler to bring the coupling meinbers
still closer together, or to renew the packing rings.
.or not.
In Fig. 3 of the drawings, I have showu a view partly in side elevation and
partly in vertical section of my improved pipe coupling as modified for coupling
one lead pipe, with a pipe of iron, or other non-expansible metal. In this modified
Construction, as shown, the joint-piece F is formed integral with an iron or other
non-expansible pipe G, and constructed with a single iuclined bearing face f, and
with a hub of smaller diameter than the said bearing face beyond which it
projects. A packing ring H formed of rubber or equivalent material, is fitted
over the said hub, to the exterior diameter of which its interior diameter
corresponds, while its outer face is iuclined to agree with the inclined bearing face,
than which it is slightly larger. If desired, the joint-piece F might be formed
independently of and set into the iron pipe G, as indicated by the broken line. 1.
The expanded cud of the lead pipe J, is drawn over the packing ring, and the
inclined face of the joint-piece, by means of a coupling member K, the bore of
which flares at its inner end, at which the said piece is constructed with an
outwardly projecting annular coupling shoulder k, which is engaged by an inwardly
projecting coupling flange l, formed at the corresponding end of the coupler L, the
inner face of which is threaded to take into the exterior threads formed upon the
adjacent end of the pipe G, which in this instance takes the place of an independent
coupling member to coact with the coupling member K. To adapt the coupler L
to be turned for the purpose of drawing the pipes together, it is constructed with
a band of gripping faces for the application of a wrench, while for the purpose
of holding the coupling member K against rotation while the coupler L is being

page_text: turned, it is constructed at its outer end with a band of gripping faces for the
application of a wrench or equivalent tool. In using this form of my device the
coupling member K is applied to the lead pipe J, the end of which is thon expanded
by means of a plug or other instrument, to fill the flaring inner end of the
longitudinal bore of the same member. The coupler L is then slipped over the
conpling member K from the outer end thereof, until its coupling flange engages
with the coupling shoulder k, after which further rotation of the coupler will draw
the coupling member K toward the pipe G, and hence draw the expanded end of
the lead pipe J upon and over the packing ring H and the inclined face of the
joint-piece F. In this case the joint is formed between the expanded end of the
lead pipe and the inclined outer face of the packing ring and the inclined face of
the joint-piece.
It is apparent that in carrying out my invention I may make some changes from
the construction herein shown and described, and I would therefore have it under-
stood that I do not limit myself thereto. I am aware, however, that it is old to
employ a joint-piece having laces inclined in opposite directions for the purpose of
forming a joint between two lead pipes, and combined with two coupling members,
and a collar for drawing them together, and I do not, therefore, claim such
construction broadly.
Having now particularly described and ascertained the nature of the said inven-
tiou, and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what I claim is :
First. A pipe coupling comprising a joint-piece baving an inclined annular
bearing face and a hub projecting beyond the same and of smaller diameter, a
packing ring applied to the said hub, and having its outer face inclined to agree
with the inclination of the bearing face of the joint-piece, a coupling member
baving the inner end of its longitudinal bore flared, and a collar engaging with the
said member for drawing the pipe which it fits, upon and over the ring and inclined
face of the joint-piece, substantially as described.
Second. A pipe coupling having a joint-piece, the enlarged central portion of
which has two oppositely inclined annular bearing faces, and which has two
oppositely projecting hubs extending beyond those faces and smaller in diameter
than the same, two packing rings respectively applied to the said hubs, and having
their outer faces inclined to agree with the inclination of the said bearing faces,
two coupling members, the inner ends of the longitudinal bores whereof are flared,
and one of which has exterior screw threads and the other a coupling shoulder,
and an interiorly threaded collar taking into the said threads and having an
inwardly projecting coupling flange to coact with the said shoulder, substantially
as set forth.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.