IMPROVEMENTS IN THE CONSTRUCTION OF VALVES FOR PUMPS OF ALL DESCRIPTIONS
Year: 1881

page_text: LETTERS PATENT to Asplan Beldam, of 77, Gracechurch Street, in the City
of London, Marine and Consulting Engineer, for an Invention of
"IMPROVEMENTS IN THE CONSTRUCTION OF VALVES FOR PUMPS OF ALL
DESCRIPTIONS."
PROVISIONAL SPECIFICATION left by the said Asplan Beldam at the Office
of the Commissioners of Patents on the 5th February 1881.
ASPLAN BELDAM, of 77, Gracechurch Street, in the City of London, Marine
and Consulting Engineer. "IMPROVEMENTS IN THE CONSTRUCTION OF VALVES
FOR PUMPS OF ALL DESCRIPTIONS."
In lieu of the valves ordinarily in use, either bucket, head, suction or delivery
valves, I employ a light metalic or other disc so constructed as to give the necessary
amount of elasticity allowing for the free passage of the water or other liquid, at
the same time securing to it a sufficient degree of stability, enabling it to repeat
momentarily to the action of the pump. The construction and application of these
discs or valves is as follows:-In the centre of the disc a boss or collar is stamped
or flanged out of sufficient diameter and depth to receive a bush or lining of lignum
vitac or other suitable substance, which lining is held & kept in position by
means of a grove turned on the periphery of the same, into which the flange of the
said valve is compressed, or it may be secured thereto by a metalic ring or collar
shrunk thereon or by any other suitable mechanical contrivance, or this boss or
flange may be used without the lining or bush. This disc 1 propose to flute or
corrugate with one, two, three, or more flutes or corrugations dependant on the
diameter of the disc or valve. These flutes or corrugations may either be concentric
or radiating, as circumstances may require, or it may be made plain and the necessary
rigidity given to it by-lamination or the application of other plates of less diameter
in succession one on the top of the other, or it may be constructed of cast metal of
such form as may be required. Having now described the nature of my said
Invention, and the method of constructing the same, I claim for this Invention, the
application of metalic or other discs so constructed in combination with lignum
vitae or other suitable substance forming a bush or collar, allowing it to rise and fall
upon the rod or pin, or the said collar may in some instances be found sufficient
without the internal lining, as before described.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, and
of an Order of the Lord Chancellor, filed by the said Asplan Beldam in the
Great Seal Patent Office on the 19th August 1881.
ASPLAN BELDAM, of 77, Gracechurch Street, in the City of London, Marine
and Consulting Engineer. "IMPROVEMENTS IN THE CONSTRUCTION OF VALVES
FOR PUMPS OF ALL DESCRIPTIONS."
In lieu of the valves ordinarily in use, either foot, bucket, head, suction or
delivery valves, I employ a light metal or other disc so constructed as to give the
necessary amount of elasticity, allowing for the passage of the water or other
liquid, at the same time securing to it a sufficient degree of stability, enabling it to
repeat momentarily to the action of the pump. The construction or application of
these discs is as follows:-In the centre of the disc a boss or collar is stamped or
flanged out of sufficient diameter and depth to receive a bush or lining of lignum
vitæ or other suitable substance, which lining is held and kept in position by means
of a groove turned on the periphery of the same, into which the flange of the said
valve is compressed, or it may be secured thereto by a metallic ring or collar shrunk
thereon, or by any other suitable mechanical contrivance, or a boss on this flange
may be used without the lining or bush. This disc I purpose to flute or corrugate
with one, two, three, or more corrugations dependant on the diameter of the disc or
valve. These flutes or corrugations may either be concentric or radiating, as
circumstances may require, or may be made plain and the necessary rigidity given
to it by lamination or the application of other plates of less diameter in succession,
one on the top of the other, or it may be constructed of cast metal of such a form
as may be required.
Having now described the nature of my said Invention, and the method of
constructing the same, I. claim for this Invention,―
The application of metallic or other discs so constructed in combination with
lignum vitæ or other suitable substance forming a bush or collar, allowing it to
rise or fall upon the rod or pin, or the collar may in some instances be found
sufficient without the internal lining, as before described.
In witness whereof, I, the said Asplan Beldam, have hereunto set my seal
this Nineteenth day of August 1881.
Witness,
CHARLES BEAUMONT,
77, Gracechurch St.,
London, E.C.
ASPLAN BELDAM. (L.S.)