Improvements in Pressure-reducing Valves.
Year: 1892

page_text: Date of Application, 9th Dec., 1892
Complete Specification Left, 7th Sept., 1893-Accepted, 7th Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in Pressure-reducing Valves.
I, ROBERT COCKBURN, of 45, Abbotsford Place, 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 relates to pressure-reducing valves of the kind in which the
passage for steam is controlled by a disk valve or other suitable valve, the spindle
of which extends downwards through an elongated chamber fixed to the underside
of the valve box, and is fixed to a flexible diaphragm, and below the diaphragm has
adjustably fixed to it a crosshead connected by a pair of helical springs to the
outside of the upper part of the chamber. The chamber becomes filled with water
condensed from the steam and the water prevents the steam acting directly on the
flexible diaphragm.
The object of my invention is to insure sufficient coolness of the water in contact
with the flexible diaphragm without inconveniently and objectionably. increasing
the length of the chamber; and for this purpose I increase the external surface or
both the external and internal surfaces of the metal of which the chamber is formed
so that the radiation of heat from the metal and from the water may be increased.
The metal of the chamber may be formed with external ribs, gills, or other pro-
jections, or the metal may be corrugated longitudinally, circularly or otherwise so
as to have increased internal and external surfaces.
Dated this Eighth day of December 1892.
TEET
EDMUND HUNT,
Applicant's Agent,
COMPLETE SPECIFICATION.
Improvements in Pressure-reducing Valves.
I, ROBERT COCKBURN, of 45 Abbotsford Place, 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 relates to pressure-reducing valves of the kind in which the
passage for steam is controlled by a disk valve or other suitable valve, the spindle of
which extends downwards through an elongated chamber fixed to the underside of the
valve box, and is fixed to a flexible diaphragm, and below the diaphragm has
adjustably fixed to it a crosshead connected by a pair of helical springs to the
outside of the upper part of the chamber. The chamber becomes filled with water
condensed from the steam and the water prevents the steam acting directly on the
flexible diaphragm.
The object of my invention is to ensure sufficient coolness of the water in contact
with the flexible diaphragm without inconveniently and objectionably increasing
the length of the chamber; and for this purpose I increase the external surface or
both the external and internal surfaces of the metal of which the chamber is formed
so that the radiation of heat from the metal and from the water may be increased.
The metal of the chamber may be formed with external ribs, gills, or other pro-
jections; or the metal may be corrugated longitudinally, circularly or otherwise so
as to have increased internal and external surfaces.
And in order that my said invention and the manner of performing the same may
he properly understood I hereunto append a sheet of explanatory drawings to be

page_text: hereinafter referred to and showing by way of example one simple modification of
my improved pressure-reducing valves.
Figure, 1, of the drawings is a vertical section of my improved valve, and
Figure, 2, is a horizontal section.
As shown in the drawings the pressure-reducing valve is of the kind in which the
passage, A, for steam is controlled by a disk valve, B, a spindle, C, jointed to
which extends downwards through an elongated chamber, D, fixed to the underside
of the valve box, E, and is fixed to a flexible diaphragm, F; and below the
diaphragm has adjustably fixed to it a crosshead, G, connected by a pair of helical
springs, H, to the outside of the upper part of the chamber, D. The chamber, D,
becomes filled with water condensed from the steam and the water prevents the
steam from acting directly on the flexible diaphragm, F, and in order to insure
sufficient coolness of the water in contact with the flexible diaphragm, without
inconveniently and objectionably increasing the length of the chamber, D, I, by
my present invention form longitudinal corrugations, J, in the metal of which the
chamber is formed so as to give increased internal and external surfaces and thus
cause the radiation of heat from the metal and from the water to be increased.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is :-
In pressure-reducing valves forming the metal of the elongated chamber in which
water due to condensation interposes between the steam and a flexible diaphragm
with external ribs, gills, or other projections, or with longitudinal, circular, or
other corrugations, substantially as and for. the purpose hereinbefore described.
Dated this Sixth day of September 1893.
EDMUND HUNT,
Applicant's Agent.