Year: 1895

page_text: Date of Application, 12th July, 1895
Complete Specification Left, 13th Apr., 1896-Accepted, 16th May, 1896
I, ALEXANDER SHIELS of 190 Bath Street, Glasgow, M.B., C.M., B.Sc., do
hereby declare the nature of this invention to be as follows:-
This invention relates to valve seats and it has for its object to improve their
construction.
is
Under this invention the valve seat which is of ring shape is turned with a circular
groove having, preferably, a slightly bevelled outer circumferential wall on one side
and a thin inner circumferential wall on the other side. Forced into this groove
a leather, rubber, or other suitable ring-seating and this seating, when in place,
In order to hold the leather or other
projects slightly above and out of the groove.
seating securely in place in the groove the inner circumferential wall is beaded,
spun, or turned over slightly so as to bite into the soft seating.
The valve which is a flat disc valve when closed sits on the soft seating
aforesaid.
Dated this 11th dox of July 1895
H. D. FITZPATRICK,
70 Wellington Street, Glasgow, Agent.
1, ALEXANDER SHIELS, of 190 Bath Street, Glasgow, M.B., C.M., B.Sc., 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:-
This invention relates to valve seats and it has for its object to improve their
construction.
And in order that my said invention may be properly understood I have hereunto
appended, by way of example, an explanatory sheet of drawings, whereon:-
Fig. 1 is a side elevation of a valve with its seat.
Fig. 2 is a plan.
Fig. 3 is a vertical section.
Under this invention the valve seat a, which is of ring shape, is turned with a
circular groove b (see Fig. 3) having, preferably, a slightly bevelled outer circum-
ferential wall c. Forced into this groove is a leather, rubber, or other suitable
ring-seating d and this seating when in place, projects slightly above and out of the
groove b. In order to hold the leather or other seating d securely in place in the
groove the inner circumferential wall e is spun or turned over slightly at the top,
at e', so as to bite into and compress the soft seating d.
The valve seat a is connected by means of arms g to the guide h through which
the valve spindle i works.
The valve which is a flat disc valve, when closed, sits on the soft seating d.
Bil

page_text: The guide his, preferably, provided with a let-in rubber ring k against which the
nut jou the spindle i strikes when the valve is lifted. This ring & deadens the noise
produced by the valve when working.
The ring seating, secured as hereinbefore described, can be used for any form of
valve requiring ring seatings of rubber, leather, or other soft material.
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
consider novel and desire to claim is :-
A valve seat wherein the soft ring seating is inserted in a groove and held in
place therein by spinning or turning over one of the walls of the groove, substantially
as herein before set forth.
Dated this 11th day of Anril 1896.
H. D. FITZPATRICK,
70 Wellington Street, Glasgow, Agent.
H. D. FITZPATRICK,
70 Wellington Street, Glasgow, Agent.