Improvements in Pipe Joints.
Year: 1891

page_text: Date of Application, 10th Apr., 1891
Complete Specification Left, 7th Jan., 1892-Accepted, 13th Feb., 1892
PROVISIONAL SPECIFICATION.
Improvements in Pipe Joints.
I, THOMAS ROBERTS MURRAY, of The Crown Iron Works, Glasgow, in the
County of Lanark, North Britain, Engineer, do hereby declare the nature of this
invention to be as follows, that is to say :-
My said invention has for its object to construct improved joints for wrought iron,
or steel, or other metallic pipes, so as to remain quite tight when subjected to very
high pressure.
In carrying out my invention each pipe end is made with a thickened collar, and
the joint face of one pipe end of a pair, is made with an annular projecting rib, the
joint face of the other pipe end of the pair is made with an annular recess or rebate
into which the projection enters when the two pipe ends are brought together.
Lead or other suitable slightly compressible material is put in the annular recess to
make the joint tight. The pipe ends are fixed together by means of screw bolts
which connect rings fitting or nearly fitting on the pipes and bearing against the
inner sides of the collars on the pipe ends. Or lugs may be formed on the collars
to receive the screw bolts by means of which the pipe ends are fixed together.
Dated this Ninth day of April 1891.
EDMUND HUNT,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in Pipe Joints.
I, THOMAS ROBERTS MURRAY, of The Crown Iron Works, Glasgow, in the
County of Lanark, North Britain, 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, that is to say :-
My said invention has for its object to construct improved joints for wrought-iron
or steel, or other metallic pipes, so as to remain quite tight when subjected to very
high pressure.
In carrying out my invention each pipe end is made with a thickened collar, and
the joint face of one pipe end of a pair is made with an annular projecting rib, and
the joint face of the other with an annular recess or rebate into which the projection
can enter. The joint is completed, there having first been inserted into the annular
recess some suitable slightly compressible material, by rings fitting on each pipe and
fastened together by bolts, or if desired lugs may be formed on the collars to receive
screw bolts.
And in order that my said invention and the manner of performing the same may
be properly understood, I hereunto append a sheet of explanatory drawings to be
hereinafter referred to and showing three examples of my improved pipe joint.
Figure, 1, of the drawings is an elevation.
Figure, 2, is an end view with the pipe in section, and Figure, 3, is a longitudinal
section of one example of my improved pipe joint.

page_text: Figure, 4, is a longitudinal section of a second example.
Figure, 5, is an end view, with the pipe in section of a third example.
Figure, 6, is an edge view, and Figure, 7, a face view as at right angles to Figure, 6,
of a half ring used with some modifications of iny improved pipe joint.
In these drawings the same reference letters are used to mark the same or like
parts wherever they are repeated.
As shown in the drawings each pipe end, A, is made with a thickened collar, B,
and the joint face of one pipe end of a pair is made with an annular projecting
rib, C, whilst the joint face of the other pipe end of the pair is made with an
annular recess or rebate, D, into which the projection, C, enters when the two pipe
ends are brought together. Lead or other suitable slightly compressible material, E,
is put in the annular recess, D, to make the joint tight. In Figures, 1, 2, and 3, the
pipe ends, A, are fixed together by means of screw bolts, F, which connect rings, G,
fitting or nearly fitting on the pipes, H, and bearing against the collars, B, on the
pipe ends.
In the place of rings, G, lugs, K, may be formed on the collars, B, as
shown in Figure, 4, to receive the screw bolts, F, by means of which the pipe ends, A,
are fixed together. Where rings, G, are employed they may if desired be arranged
to go on in halves as shown in Figures 5, 6, and 7.
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 I am
aware of the Specification of Letters Patent No. 16272 of 1886 granted to
Arthur Ramsden and describing a joint which is made with cement for sewer and
like pipes, and I do not claim anything described and claimed therein but what I
claim is :-
The improved pipe joint in which the meeting faces of thickened collars formed
on the pipe ends have, the one an annular rib and the other an annular recess, in
which recess suitable slightly compressible material is inserted, the pipe ends being
fixed together by screw bolts engaging in rings or in half rings or in lugs on the
collars substantially as hereinbefore described.
Dated this Sixth day of January 1892.
EDMUND HUNT,
Applicant's Agent.