Year: 1888

page_text: Date of Application, 27th Mar., 1888
Complete Specification Left, 27th Dec., 1888
Complete Specification Accepted, 12th Feb., 1889
1, ARTHUR MECHAN, Neptune Iron Works, 60 Elliot Street, Cranstonhill, Glasgow,
in the County of Lanark, Engineer, do hereby declare the nature of this Invention to
be as follows:-
This Invention relates to improvements in flange joints for pipes and it has for its
object to provide in a simple and efficient manner a joint which shall be tight against
the passage or leakage of air, steam, gas or liquids. In constructing the improved
joint each end of the pipe section has secured to it by rivetting, bolting or otherwise
one arm of an angle iron ring the other arm of which constitutes the projecting flange
through which the bolts are passed in joining two sections of the pipe together. The
palm of the projecting flange is preferably flush with the end of the pipe section
although it may project beyond it and vice versa. The bosom of the angle iron ring,
that is to say, the meeting points of the two arms instead of constituting a right angle
as is usual forms a curve so that when two pipe sections are butted together there is
a space enclosed between the meeting flanges and the circumference of the pipe, the
arca of which space varies according to the arc of the curve. In this space a ring of
india-rubber, asbestos, leather or other flexible and compressible material is situated
which ring is of any desired shape in cross section. The ring is placed in position on
one section previous to bringing the two sections of the pipe together and as the
flanges of the joint are screwed or bolted up the compression thereby exerted on the
ring forces it to occupy the entire space enclosed between the bolting flanges and
the circumference of the pipe thereby making a tight joint.
Dated this Twenty sixth day of March 1888
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow,
Agents.

page_text: Improvements in Flange Joints for Pipes.
I, ARTHUR MECHAN, Neptuno Iron Works, 60 Elliot Street, Cranstonhill, Glasgow
in the County of Lanark, 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 flange joints for pipes and it has for its
object to provide in a simple and efficient manner a joint which shall be tight against
the passage or leakage of air, steam, gas or liquids. In constructing the improved
joint each end of the pipe section has, as shewn by the several figures on the accom-
panying drawings, secured to it by rivetting, bolting or otherwise one arm A, of an
angle iron ring the other arm A', of which constitutes the projecting flange through
which the bolts B, are passed in joining two sections of the pipe together. The palm
or face of the projecting flange A¹ may be flush with the end of the pipe section as
seen at figure 3, but it is preferred that the flanges should be arranged as shewn at
figures 1, 2, 4 and 5, that is to say, that the palm or face of one flange A¹ of the joint
should overlap the end of its pipe section C whilst the other pipe section D has its end
projecting beyond its flange A¹. In any case the bosom E of the angle iron ring
where the two arms A, A¹, meet, instead of constituting a right angle, as is usual,
forms a curve so that when two pipe sections are butted together there is a space
enclosed between the meeting flanges A¹ and the circumference of the pipe, the area
of which space varies according to the arc of the curve. In this space a ring of any
desired shape and made of india-rubber, asbestos, leather or other flexible and
compressible material is situated as seen at F figures 1, 2 and 3 or the ring may be
composed of a length F of copper pipe covered with india-rubber, asbestos or the like
as shewn by figures 4 and 5. The ring For F¹ is placed in position on one section
previous to bringing the two lengths of the pipe together and as the flanges of the
joint are screwed or bolted up the compression thereby exerted on the ring forces it to
occupy the entire space enclosed between the bolting flanges and the circumference of
the pipe thereby making an air, gas, steam or liquid tight joint.
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 :-
The improved flange joint for pipes substantially as hereinbefore described with
reference to the annexed drawings.
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