Improved Means for Closing Junction Inlets or Outlets in Stoneware Pipes when not in use, applicable also for Joining Fipes.
Year: 1898

page_text: Date of Application, 19th Dec., 1898-Accepted, 11th Feb., 1899
COMPLETE SPECIFICATION.
Improved Means for Closing Junction Inlets or Outlets in Stoneware
Pipes when not in use, applicable also for Joining Fipes.
I, JAMES COBDEN TRUEMAN, of Birchwood Park Road, Swanley, in the County
of Kent, Road Drainage and Sewer Contractor, 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: —
My invention has for its object means whereby the junction inlets or outlets
in stoneware pipes may be closed when not in use, in such manner that such
junction inlets or outlets may be easily opened when desired but when closed
cannot be opened by pressure from within the pipes, as sometimes occurs with
the means heretofore generally employed for the purpose, and which means
are also applicable for joining pipes.
For this purpose 1 form in the interior of such junction inlet or outlet an
annular seating and at a suitable distance from this and nearer the outer end
of the junction, I provide an annular ridge cut away at two or more equidistant
points and of an inner diameter slightly greater than that of the seating.
In conjunction with a junction inlet or outlet so formed, I employ a plug of
such diameter that the same will pass freely through the annular ridge, but of
greater diameter than the opening through the seating, so that when inserted,
its inner surface, or end thereof, may be caused to rest on this latter.
This plug has formed on it segmental projections having curved upper surfaces
and corresponding in size and position with the recesses formed by cutting away
the annular ridge in the junction, and so situated that when the plug is inserted
they will pass through these recesses and then, if the plug is slightly revolved,
they will be brought to engage with the underside of the annular ridge, and
owing to their curved upper surfaces, will force the face or inner end of the plug
on to the annular seating on which has been previously placed a layer of clay
composition, or the like.
When desired a second joint may be obtained by flanging the outer end of the
plug and making this latter of such length that this flange will make a joint
with the end of the junction when the plug is secured in position.
In order that my invention may be better understood and carried into practical
effect I will describe the same with reference to the accompanying drawings, of
which
Fig. 1 is a section of a stoneware pipe with a junction inlet or outlet con-
structed and fitted with plug according to my invention.
Fig. 2 is a view of a pipe with junction inlet or outlet from which the plug is
removed, shewing the latter in plan.
Figs. 3 and 4 are an elevation and plan, respectively, of the plug, and
Fig. 5 is a sectional elevation of a junction inlet or outlet with modified form
of plug in position.
As shewn in Figs. 1 and 2 the junction inlet or outlet is constructed with an
annular seating a, and at a suitable distance above this with an annular ridge b
077

page_text: cut away at two (as shewn in Fig. 2) or more points c, equidistant from each
other, the inner diameter of which is slightly greater than that of the seating.
With a junction inlet or outlet so formed is employed a plug d (shewn detached
in Figs. 3 and 4) of such diameter that it will pass the ridge but not the seating a
and having formed on it projections corresponding in size and number with
the openings formed by cutting away the ridge b and having their upper surfaces
curved as shewn in Fig. 3.
This plug is secured in position and the junction closed by arranging it so
that the projections correspond with the openings c c and then inserting it so
that it rests on the seating a on which has previously been placed a layer of
clay composition or the like. The plug is then revolved and the projections
brought under the ridge 6 when owing to the upper surfaces of these projections
being curved the plug will be firmly pressed on to the seating.
When found desirable the outer end of the plug may be caulked round with
clay or the like, when secured in position.
In the modified form of plug shewn in Fig. 5 a flange e is provided which when
the plug is secured in position, makes a second joint with the end of the junction
and this may be rendered more secure by the use of a layer of clay coniposition
or the like.
The above described arrangement can, as will be understood, be employed for
joining pipes the projections in this case instead of being formed on a plug,
being formed on the opposite end of the pipe to that having the seating and
ridge formed in it.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed I declare that what I
claim is:-
(1) Means for closing junction inlets or outlets in pipes consisting of the con-
struction of such junction inlets or outlets with an annular seating such as a
and segments of an annular ridge such as b, together with a plug such as d
pro-
vided with projections such as having curved upper surfaces, the whole con-
structed and arranged substantially as described and illustrated.
(2) In means for closing junction inlets and outlets as above claimed, a plug
provided with a flange at its outer end such as e substantially as and for the
purpose described.
(3) Means for joining pipes consisting of the construction in one end of each
pipe of an annular seating and an annular ridge cut away at suitable points
and the formation on the opposite end of each pipe of segmental projections sub-
stantially as described.
CASTLE SMITH,
"Invention" Office, Mitre Court, Fleet Street, London, E.C.,
Agent for the Applicant.