AN IMPROVED JOINT FOR PIPES, OR FOR OTHER PURPOSES WHERE SUCH JOINTS ARE REQUIRED
Year: 1871

page_text: PROVISIONAL SPECIFICATION left by Leopold Miles Green at' the
Office of the Commissioners of Patents, with his Petition, on the
1st February 1871.
I, LEOPOLD MILES GREEN, the elder, of Southsea, in the County of
Hants, Engineer and Millwright, do hereby declare the nature of the
said Invention for "AN IMPROVED JOINT FOR PIPES, OR FOR OTHER PURPOSES
WHERE SUCH JOINTS ARE REQUIRED," to be as follows:-
The object of this Invention is to provide a ready and effectual means
of joining or connecting flanged pipes applicable to any pneumatic,
hydraulic, steam, or other joint, or in joining parts of hot water pipes
or of cylinders provided with flanges on their outer rims, and is intended
to dispense with the present labour and expense of planing or truly
facing the adjoining flanged surfaces by simply scraping off the sand
when the pipe comes from the foundry, and then coating the faces of
the flanges by preference with red lead and boiled oil, to prevent
oxidation of the iron or metal when dry.
In pipes where pressure is from the inside I proceed to carry the
Invention into effect as follows:-In the flanges of pipes to be joined or

page_text: connected together a suitable number of holes are made opposite each
other. I then place a ring of iron or other suitable metal between the
faces of the adjoining pipes, the ring being of such a diameter as that
the outer circumference or rim thereof will just touch and be held
securely in position by the connecting bolts when passed through the.
holes above mentioned. Fitting tightly inside this ring I place another
ring slightly thicker than the metal one, made of leather, caoutchouc, or
a combination of the two, or of any suitable elastic or other composition
capable of being easily compressed; the interior diameter of this ring
is made about the same size as the interior diameter of the pipe or other
article required to be joined. I then tightly screw or bolt the flanges
together, and thus compressing the elastic ring and forming a very
efficient and proper joint. The inside pressure of the water, air, steam,
or other medium pressing against the inner diameter of the leather or
elastic ring forces the same outwards and against the metal holding
ring; by this means the joint is made still more secure.
In pipes or other apparatus where the pressure is from the outside,
such as suction pipes and pumps, I proceed as follows:-I place the
metal ring inside and have the inner diameter of the same of exactly the
same bore as that of the pipes or other articles required to be joined.
Outside and fitting closely round this I place the elastic ring (which is
ślightly thicker than the metal one), and this is held in position by the
bolts, as above described with reference to the metal ring.
When the pipes or other articles are connected or joined together by
the screws or bolts this elastic ring will be compressed, and thereby
form a secure joint, and the outside pressure of the air or other medium
pressing against the outer rim of the leather or elastic ring will force it
against the inner metal ring, and so will make the joint still more
secure and in every way effectual.