Improvements in Pipe Joints or Couplings.
Year: 1895

page_text: Date of Application, 22nd Oct. 1895-Accepted, 23rd Nov., 1895.
COMPLETE SPECIFICATION
Improvements in Pipe Joints or Couplings.
1,JAMES WILL8 of 1700 Bioadway, New York, United States of America,
Manufacturer, 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
The invention which forms the subject of my application is an improvement in
devices for effe ting a tight joint between two pipes. Couplings especially designed
for this purpose, and in which other means than the registering screw threads are
employed to obtain a water and steam tight joint have heretofore been male, one
form of such couplings having been formed with an annulai recess for containing a
soft metal such as lead, which, alter the coupling has been screwed over the ends
of the pipes, has been forced by different means into the theads of the pipe
In certain other devices the material of the coupling itself has been coniugated
by a tool similar to a dull pipe-cutter so as to form internal ribs of slightly less
diameter than the pipe which is to be duiven into the sleeve or coupling, but in such
and sumilat devices the objects sought are not the same as those secured by my
invention.
My improvement consists in a theaded sleeve or coupling of wrought or
malleable on or steel of the ordinary kind, except that at two or more points near
tends the material is reduced in thickness as by having cucumferential grooves
cur in it, whereby the threads of the sleeve itself at such points may be compressed
by a tool into the threads of the pipe, and thus form a tight joint.
This device is illustrated in the accompanying drawing, in which
Fig. 1 illustrates in cential longitudinal section the ends of two pipes joined
by my improved coupling, and
Figs. 2 and 3 similar views of modifications
A, B represent the pipe sections to he joined They may be of the ordinary
character of non or steel and are externally and oppositely threaded at their ends
Ce an internally threaded sleeve or pipe section torming a couple of the usual
character, except that it must be of a material sufficiently malleable to accomplish
the purpose hereinafter described.
In the sleeve Caie cut two, a it may be more, circumferential grooves D, D,
to thin the metal at at least one point over each section
Pipe
After the pipes are joined by the sleeve or coupling C, a tool such as an ordinary
pipe cutter but with a blunt edge wheel is employed to force the material of the
coupling under the grooves D down himly into the threads of the pipe section.
The coupling C may be adapted to connect three or more pipes, as shown in Fig 2,
or the coupling might be aiianged to screw into the ends of the pipes, instead of
over them, in which ease the grooves D would he cut in the pipes and the material
of the pipe forced into the thieads of the coupling.
By severe tests I have found that by this means a remarkably perfect and tight
joint may be secured and maintained in pipes subjected to heavy pressure, on those
used for conveying fluids that ordinary joints fail to prevent from leaking
It is obvious that a coupling of this kind is no more expensive than an ordinary
coupling, while it possesses all the advantages of the more expensive and
complicated devices heretofore used.

page_text: 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
1. A sleeve or coupling for pipes composed of malleable metal internally threaded
to receive the correspondingly threaded ends of pipe sections and containing two
external circunferential grooves or portions reduced in thickness near its ends, as
and for the purpose set forth.
2. The combination with pipe sections having threaded ends of a threaded sleeve
or coupling having portions of reduced thickness over each pipe section compressed
into the threads of said pipe sections, as set forth
3. The combination with pipe sections externally threaded, of a coupling
internally threaded and containing cucumferential grooves at or near its ends
and compressed or forced around such grooves into the threads of the pipe sections,
as set forth.
Dated thus 50nd das of Oatabor 1905
ПTASELTINE, LAKE & Co,
45 Sonthampton Buildings, London, W.C., Agents for the Applicant.