Improvements in Wheel-valves, Lubricator Covers, and similar Articles.
Year: 1890

page_text: Date of Application, 17th July, 1890
Complete Specification Left, 7th Nov., 1890-Accepted, 27th Dec., 1890
PROVISIONAL SPECIFICATION.
Improvements in Wheel-valves, Lubricator Covers, and similar
Articles.
JOSEPH SAMUEL SMITH Ironmonger Grove Avenue Southey Street Nottingham
do hereby declare the nature of this invention to be as follows:-
My invention has for its object improvements in the construction of valves
known as screw or wheel valves, the invention is also applicable to retention
and other valves in which the passage through them is closed by a plate or disc
being pressed upon a seat. The invention can also be applied to other articles
where a joint is required to be frequently made and broken, such as lubricator
Cover.
In applying my invention to small valves made of brass or gun-metal, I
make the seat solid with the valve casting and it is designed to give a double
bearing to the valve or disc. In section it resembles somewhat the letter L with
a semicircle described upon the horizontal line, and a quarter of a circle described
tangential to the top of the vertical line.
.
The valve or disc, I make of a composite metal, using copper & lead as the
ingredients, and in shape, it is a flat disc with the outer edge inclined at about
20 degrees with the spindle, the smallest diameter being at the bottom. This
valve or disc is attached by screws to a circular plate so as to be easily replaced
when worn and the plate is carried by the spindle, but by preference it is free
to rotate thereon.
For larger sized valves sometimes called "junction valves," and generally made
with a cast iron casing, I prefer to form the seat upon a ring of brass or gun
metal which is fitted into the casting, and the valve or disc I make, by
attaching a ring or disc of my composite metal to the circular plate carried by
the screw.
ת גימ
1
C T... 1000
COMPLETE SPECIFICATION.
Improvements in Wheel-valves, Lubricator Covers, and similar
Articles.
JOSEPH SAMUEL SMITH Ironmonger Grove Avenue Southey Street Nottingham
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 :-
My invention relates to an improved double seat and disc or valve applicable to
wheel or stop valves for steam and other fluids and to certain kinds of lubricator
covers and similar articles in which a passage through them has to be frequently
closed and opened.
The accompanying drawing represents an ordinary wheel valve fitted with my
improvements.
The two seats A and B are formed of curved surfaces placed relatively to
cach other substantially as shown, and the valve is a flat disc D of a slightly
compressible metal or mixture of metals, the edges of which are inclined at
about 70° to the upper surface and designed to bear upon both seats at the
same time.
When a valve and seat are constructed as shown it will be seen that theoretically
the bearing surfaces of the seat and valve when first brought together touch

page_text: cach other in two lines and that any compression of the disc will increase the
bearing surfaces in a relatively greater extent than the amount of vertical motion
given to the valve to produce the compression.
Instead of making the curve for the upper scat B tangential to the side Cit
might be made to project, but I prefer the former method as being simpler for
manufacture..
The disc D I make of seven parts of copper and three parts of lead but I do
not confine myself to this mixture as any inetal or mixture of metals having a
similar degree of hardness may be used.
By preference the disc D is attached to a plate E free to revolve upon the
spindle F which works within a nut and gland G but as these parts, and the
remainder of the valve are of the ordinary description 1 have not thought it
necessary to describe them.
For the larger sized valves, I form the seat upon a ring of brass or gunmetal
and insert the same within the valve casting, which is generally of cast iron,
and the valve may be either a disc or a ring of compressible metal which is
secured to a plate carried by the spindle.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed declare that what I
claim is :-
.
"The use in valves and other similar articles of a double seat constructed sub-
stantially as shown and described, in combination with a disc of compressible
metal, or mixture of metals, designed to bear upon both seats at the same time."
Dated this 6th day of November 1890.
JOSEPH SAMUEL SMITH.