An Improved Pump Valve.
Year: 1892

page_text: Date of Application, 9th Jan., 1892
Complete Specification Left, 28th Jan., 1892-Accepted, 5th Mar., 1892
PROVISIONAL SPECIFICATION.
An Improved Pump Valve.
JAMES JOHN TYLER 189 Malmesbury Road Bow, London, E., Marine
Engineer do hereby declare the nature of this invention to be as follows:-
On a perforated disc of any metal is cast a short cylinder, (the cylinder being in
the centre of the disc) and bored out to any desired diameter which I call the valve
seat. Inside this cylinder and projecting at both ends is a hollow tube fitting
loosely in the cylinder and able to move freely backwards and forwards. Over the
outside diameter of the said cylinder I use a spiral spring fitting between the
perforated disc and a flange on one end of the said hollow tube, and securely
fastened to the opposite end of the said hollow tube is a solid disc of any material
which covers the perforated disc before mentioned on one side. This solid disc
and hollow tube can move freely together backwards and forwards controled by
the spring.
1
1000
JAMES J. TYLER.
COMPLETE SPECIFICATION.
An Improved Pump Valve.
I, JAMES JOHN TYLER, of 189, Malmesbury Road, Bow, in the County of
London, Marine 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 :-
My invention relates to pump-valves of the kind usually employed in connection
with the condenser-pumps of steam-ships and which are designed to work hori-
zontally; the chief object of my invention being to provide a valve which is less
liable to get out of order than valves hitherto used.
According to my invention the valve-seat has a central boss or cylinder through
which the stem of the valve proper slides during the opening and closing of the
valve. This valve-stem, instead of being made solid as heretofore, is made hollow,
whereby the valve will open and close more readily than a valve having a solid
stem for the reason that, firstly, the hollow stem is much lighter than a solid stem,
and, secondly, that the said stem being hollow and filled with air tends to float the
valve and thereby reduce the friction of the same when sliding in the boss or
cylinder.
Surrounding the cylinder upon the valve-seat and between the latter and the
flange on the end of the valve stem is a spring serving to close the valve after it
has opened.
To enable my invention to be fully understood I will describe the same by
reference to the accompanying drawing, in which :-
Figure 1 is an elevation of my improved valve; and,
Figure 2 is a section on the line, Figure 1.
a indicates the valve-seating having formed in it a series of apertures b, such, for
instance, as those shewn in dotted lines in Figure 1, for allowing the passage of the
water therethrough, and c is the central boss or cylinder cast integral with the said
seating. d is the valve adapted to close the apertures 6 in the seating a, and e is
the stem of the said valve. This stem, as hereinbefore stated, is made hollow, the
end which carries the valve being reduced in diameter to receive a nut f, as shewn,
whilst the other end is provided with the flange g. The opening in the flanged end
D
.

page_text: of the stem is closed by a plate which is hermetically sealed in the said opening.
i is the spring arranged between the valve-seating a and the flange g of the stem
and serving to return the valve to its seat.
The valve shewn in the drawing is represented as composed of a disc j of material
such as woodite and of a metal disc k which bears against the back of the said
discj in this metal disc & I form a series of apertures 1, which serve not only to
lighten the valve but also to allow the water behind the valve to press against a
large area of the discj instead of upon its edges only as would be the case if the
disc were made solid.
I sometimes form on the internal surface of the cylinder c a groove similar to
the rifle groove of a gun-barrel. This groove becomes filled with water which,
when the valve is reciprocating, serves to slightly rotate the said valve relatively
to its seat.
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
-
1. In a pump-valve, the combination of a valve-seating having a central boss or
cylinder, a valve proper, the stem of which is made hollow, and a spring
surrounding the boss or cylinder, substantially as, and for the purpose, described.
2. The manufacture and use of pump-valves substantially as hereinbefore
described and illustrated in the accompanying drawing.
Dated the 27th day of January 1892.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.