Improvements in Pipe Joints.
Year: 1897

page_text: Date of Application, 5th Oct., 1897-Accepted, 13th Nov., 1897
Improvements in Pipe Joints.
ELIAB Box, of 289 Broadway, Bexley heath, Kent, Architect and Surveyor, 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 object of this invention is to produce a simple and efficient joint for pipes
whether used for steam, gas, water or other purpose, without the aid of brazing,
screwing, caulking or any of the other methods hitherto in use for producing a
tight joint, and the invention consists broadly, in coning out internally a socket,
inserting the pipe-ends provided with saw-cuts, and expanding the pipe-ends by
forcing in a conical hollow plug. And in order that my invention may be clearly
understood I will now proceed to describe how the same is carried out, reference
being had to the accompanying drawings in which Figures 1, 3 and 4 are longi-
tudinal sections showing three modes of effecting my object, Figure 2 being a
cross section on the line x-x Figure 1. A and A represent the two pipes to be
jcined; B is the socket or junction, and C and C₁ are hollow plugs or as they are
sometimes called, ferrules.
In Figures 1 and 2 each of the pipes A, A¹ have saw cuts a a in the ends, of
any convenient depth, as indicated by dotted lines Figure 1, and full lines
Figure 2. This forms a self-locking joint. In Figures 3 and 4 the pipe A only
has sawcuts. The socket B may be coned out internally in both directions as
shown at Figure 1, so as to form a double cone, or it may have only a single cone
as shown in Figures 3 and 4.
The hollow plugs or ferrules will each taper off as shown at Figure 1, or there
may be one plug with one taper end and one cylindrical end as shown at Figure 4,
or the end of one tube may be tapered off to act as the plug as shown at Figure 3.
In Figure 3 the pipe A will be forced into the socket B, the pipe A¹ will then
be forced into the end of pipe A and will expand the pipe-end A. In Figure 4
the pipe A will be forced into the socket B, the cylindrical part of the ferrule C
will then be forced into the end of the pipe A¹ and then the pipe A¹ with the
ferrule will be forced into the end of pipe A, and thus the end of pipe A will be
expanded.
In all cases the saw-cut pipe-ends as shown will be expanded within the conical
socket by reason of the forcing in of the tapered ferrule or ferrules, or, in Figure 3,
the tapered pipe-end. By these means a strong, simple and efficient joint will
he produced.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I would here remark
that I am aware that conical ferrules have been employed in making pipe-joints,
and also that the pipe-ends have been saw-out so that they may open out as above
described; I am also aware that two internally coned sockets have been used drawn
together by screw-threaded portions, or by bolts and nuts passing through lugs
on the sockets to jam the pipe onto the plug or ferrule, and I do not therefore
claim for any of these parts per se, but what I do claim as my invention is:
:-
1st. In a pipe-joint a single internally tapered socket to receive both pipes to

page_text: be connected, in which the saw-cut ends of both of the pipes are caused to expand
by externally tapered plugs being forced into the pipe-ends in the socket so as to
form a self-locking joint, as herein shown and described.
2nd. In a pipe-joint the use of a single internally tapered socket, externally
tapered plugs or ferrules and saw-cut pipe-ends in combination, as herein set
fcith.
.
3rd. The mode of producing a pipe-joint which consists in driving an externally
tapered plug or ferrule into a pipe-end provided with saw-cuts, contained in a
single internally tapered socket, as set forth.
4th. The mode of producing a pipe-joint which consists in forcing one externally
tapered pine-end into another pipe-end provided with saw-outs, in an internally
tapered socket, as herein shown and described.
5th. The improvements in pipe joints as herein shown and described.