Improvements in Pipe Couplings.
Year: 1897

page_text: Date of Application, 9th Mar., 1897-Accepted, 12th June, 1897
COBIT LEIE DIECIFICATION.
Improvements in Pipe Couplings.
We, JOHN THOMPSON, 274 W. 135th Street, City, County, and State of New
York, United States of America, Mechanical Engineer, and FRANK ARLO
PHILLIPS 106 Heyward Street, Brooklyn, State of New York, aforesaid,
Mechanical 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 :-
This invention relates to improvements in pipe couplings, and is more especially
applicable to junctions of soil pipes and drain pipes, or analogous cases, where two
pipes, already in place, and with their ends not quite meeting, have to be connected
together so as to form a continuous, and as far as possible, a tight, joint.
Our improved coupling consists of a sleeve or tube-section, containing two
telescoping bushings screwing into the joint and on to the pipes, the sleeve being
so proportioned as to allow it to be slipped cantwise between and over the pipe ends,
the bushings being then screwed on to the pipe ends and the sleeve then screwed
home over both bushings. The screw bushings compensate for or allow of slight
variations in the distance between the pipe ends, and form a tight joint.
By means of this invention we do away with all springing of the pipes to allow
slipping on of the coupling and all packing or filling of the joint to render the same
tight.
The coupling may also be the means of connecting a branch on to the main pipe,
a branch connection being formed on it for that purpose.
In the accompanying drawings, which form a part of this specification,
Figure 1 is an axial section of a pipe coupling embodying our improvement.
Figure 2 is a similar view, showing the coupling in process of application.
Figure 3 is an external view of the coupling, the same being here shown with a
branch connection formed on it.
A and A¹ represent the two pipe ends, for example the ends of a soil pipe. B is
a sleeve or short pipe section which is, as shown, somewhat longer than the distance
between the pipe ends, but is sufficiently large in diameter to allow it to be
introduced between the pipes by canting it to one side, and to be slipped over onc
of the pipe ends, as A. The two bushings C, C' are adapted to screw onto the
respective pipe ends A, A', by screw joints a, a', and are screwed in place after the
coupling sleeve B has been slipped over the pipe end. These two bushings are
provided in their outside with screw threaded portions c, c', preferably tapered, as
shown, to engage with corresponding threaded portions on the inside of the sleeve B.
The bushings C, C' having been screwed to the proper places, the sleeve B is then
let down into place and screwed home, the screw threaded portions of same screwing
onto both of the bushings at the same time, and, by means of the tapered screws,
forming a tight joint with both bushings at once. For this purpose the screw joints
at both ends of the sleeve are tapered in the same direction. Each bushing C or C¹
has an extension or sleeve c³ or c³ respectively, to enable it to be held or turned by
an appropriate pipe wrench.
We are aware that pipe couplings have been heretofore devised wherein an outer
sleeve was screwed over two intermediate bushings, which in turn were screwed on
to the ends of the pipes, but we are not aware that any such coupling has heretofore
been applied to pipes which were fixed at a certain relative distance before the
coupling was put on, thus necessitating the use of coupling parts that can be slipped
in between and over the ends of the pipes. This we render possible by making the

page_text: outer sleeve, which must be longer than the distance between the pipes, of
sufficiently large diameter to enable it to be inserted cantwise between and over
the ends of the pipes, and by making the bushings, which must be of a diameter to
screw onto the pipe, sufficiently short to enable them to enter between the pipe
ends. Moreover we prefer to make both of such bushings so short that even their
combined length is less than the distance between the pipes, so that both may be
put on at once. This is not necessary however for as long as either or both of
them is shorter than the distance between the end of the other bushing when screwed
home, and the end of the opposite pipe, they can be entered on to the pipes, by first
screwing on one and then slipping on and screwing up the other.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :
1. In a pipe coupling, the combination with the pipes to be joined, relatively
fixed at a certain distance apart, of a sleeve, longer than the distance between the
pipes to be joined but of larger diameter than the pipes, and two bushings engaging
respectively, by screw threads, with the two pipe ends, and with the two euls of
said sleeve each of said bushings being shorter than the distance between the pipes,
substantially as set forth.
2. The combination, with two fixed pipes, of a pipe coupling consisting of a sleeve
longer than the distance between the pines but of a diameter sufficiently larger
than the pipes to enable it to be introduced cantwise between and over the summe.
and two bushings shorter than the distance between the pipes and engaging
respectively by internal screw threads with the two pipe ends and by external screw
threads with the two ends of the aforesaid sleeve, substantially as set forth.
3. The combination with two pipes, of a coupling for the same, consisting of two
bushings screwed respectively on to the ends of said pipes, and a sleeve engaging
with both of said bushings by internal screw threads tapered in the same direction,
substantially as and for the purpose set forth.
4. The combination with two pipes relatively fixed at a certain distance apart, of
a coupling for the same consisting of two bushings screwed respectively on to the
ends of said pipes, the combined length of the bushings being less than the distance
between the pipes, and a sleeve longer than the distance between the pipes
engaging with both of said bushings by internal screw threads, substantially as and
for the purpose set forth.
5. The combination with two pipes relatively fixed at a certain distance apart
of a coupling for the same consisting of two bushings screwed respectively on the
ends of the pipes, each of said bushings being shorter than the distance between th
end of the other bushing when screwed home and the end of the opposite pipe, an
a sleeve longer than the distance between the pipes and screwed on to both of said
bushings.
6. The combination with two pipes relatively fixed at a certain distance apart, o
a coupling for the same consisting of two bushings screwed respectively on the end
of the pipes, one of said bushings being shorter than the distance between the en
of the other bushing when screwed home and the end of the opposite pipe, and
sleeve longer than the distance between the pipes and screwed on to both of sai
bushings.