IMPROVEMENTS IN THE SEATINGS FOR VALVES AND TAPS
Year: 1884

page_text: I, MICHAEL MARY BROPHY, of the firm of James Slater & Co., Holborn
Engineering Works, in the County of Middlesex, Mechanical Engineer, do hereby
declare the nature of said Invention for IMPROVEMENTS IN THE SEATINGS FOR
VALVES AND TAPS to be as follows :-
My Invention has for its object improvements in the seatings of valves and taps,
and consists in providing the seating of the tap or valve with a ring of phosphor-
bronze or other suitable hard metal. The face of this ring is conical in section,
and abuts against a relatively soft metal ring or facing let into the face of the
valve on the bottom of the spindle, and flush with the face thereof.
Dated this 1st day of January 1884.
MICHAEL MARY BROPHY.
By Phillips & Leigh,
Patent Agents,
22, Southampton Buildings, W.C.,
Agents for the Applicant.

page_text: I, MICHAEL MARY BROPHY, of the firm of James Slater & Co, Holborn
Engineering Works, in the County of Middlesex, Mechanical Engineer, do hereby
declare the nature of my Invention for "IMPROVEMENTS IN THE SEATINGS For
VALVES AND TAPS," and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement :-
My Invention has for its object improvements in the seating of valves and taps,
and in order that the method of putting the same into practice may be thoroughly
understood, I will describe it with reference to the accompanying Drawings, which
I wish to be taken as part of this Specification, and read therewith. Like parts
are marked throughout with the same reference letter.
Figure 1 is a longitudinal elevation, partly in section, illustrating thea pplication
of my Invention to an ordinary screw-down stop cock, and Figure 2 is a plan,
taken at the line -y in Figure 1. The ordinary projecting ring of the seat is
replaced by my improved seating ring, a, of phosphor bronze or other equivalent
hard metal, That part or it, a¹, which projects above the seat, is of a conical or
angular section, so that its sharp edge, a², may make a perfectly tight junction
with the facing ring, b₁, of the valve face. This edge, a³, is preferably made with
an angle of 30°, as I find that with the edge with this angle there is no lodgement
of fur. The lower part, a³, of the seating ring is fitted into the seat, c, the
shoulder, a, preventing the pressure of the face from forcing it downwards through
the seat. Or, instead of the shoulder, a', I may make the seat, c, with an annular
shelf projecting from its lower edge, upon which the bottom part, a³, of the seating
ring can rest.
The valve face, b, is formed with an annular cavity, into which is fitted a ring, b¹,
of some metal relatively soft to that of the scating ring. The comparative softness
of this metal ring, b', yielding to the sharp edge, a², of the seating ring upon which
it is screwed down by the act of closing the tap, ensures a perfectly tight junction,
without any risk of straining the parts, as is so often the case with screw down
valves of the ordinary construction.
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 a screw down or other type of disc valve, the construction of the seat of
the valve with a seating ring of hard metal-such as phosphor-bronze-having a
sharp edge, a preferably an angle of 30°-which enters a ring of softer metal
in the valve face, substantially as hereinbefore described with reference to the
accompanying Drawings.