Improvements in Stop Valves for Gas, Steam, and other Fluids.
Year: 1896

page_text: Date of Application, 22nd May, 1896-Accepted, 27th June, 1896
COMPLETE SPECIFICATION.
Improvements in Stop Valves for Gas, Steam, and other Fluids.
I, CLEMENS WEHNER of No. 11 Lessingstrasse Leipzig in the Empire of
Germany Merchant and Manufacturer of Metal Goods 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 :-
The object of this invention is to provide an improved valve and valve seating
in stop valves for gas steam and other fluids the valve seating being capable of
being renewed without removing the stop valve from its position and so arranged
as to be protected from the direct action of the current of gas steam or other
fluid.
Fig. 1 is an elevation of a stop valve constructed according to this invention
with a portion thereof in section to show the valve and valve seating with the
valve off the seating. Fig. 2 is the same view, showing the valve on the seating,
Fig. 3 is a cross section of the retaining ring B and Fig. 4 is a plan of the same.
The valve seating consists of one or more rings A Figs. 1 and 2 which may be
of any suitable material of either a soft, hard or elastic nature, the rings being
placed in an annular recess, a in the valve casing. The upper level of the seating
ring or rings A is below the upper level of the annular recess a so as to be thereby
protected from the direct action of the current of steam or the like. The recess a
is screwed to receive and hold a metal ring B which, by means of a special key
taking into slots b, Figs. 3 and 4, is screwed down on to the top of the ring or
rings A thus retaining it or them in place at the bottom of the annular recess a.
The outside diameter of the valve C must be somewhat smaller than the inside
diameter of the retaining ring B, see Fig. 2, and the bearing face must be recessed
so that the valve when on the seating ring or rings A may clear the casing.
When it is desired to renew or remove the seating ring or rings A, the spindle
packing gland, and with it the spindle and valve, is removed. The special key
already referred to is then inserted through the opening in the casing thus left, by
means of which the retaining ring B is unscrewed and the ring or rings A may
then be removed, renewed, and in the same manner replaced.
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 stop valves for gas steam and other fluids, a valve seating consisting of
one or more loose rings A inserted in an annular recess a in the valve casing and
held in position by a retaining ring B, said recess a being deeper than the thick-
ness of the ring, or the united thickness of the rings A, whereby the said rings are
protected by the casing from the direct action from the current of gas steam or
other fluid substantially as set forth.
2. In stop valves for gas, steam and other fluids, the arrangement of valve and
valve seating substantially as described and shown upon the drawings.
Dated this 22nd day of May 1896.
0
JENSEN & SON,
77 Chancery Lane, London, W.C., Patent Agents.