Improvements in Reducing Valves.
Year: 1890

page_text: Date of Application, 15th Aug., 1890
Complete Specification Left, 14th May, 1891-Accepted, 20th June, 1891
PROVISIONAL SPECIFICATION.
Improvements in Reducing Valves.
ROBERT CHARLTON Manors Newcastle-on-Tyne Brass Founder do hereby
declare the nature of this invention to be as follows:-
My invention consists in making reducing valves with the internal valve of an
improved form & of the nature of an equilibrium valve also in improvements in the
methods for opening, closing & regulating the valve, which is done by having a
handwheel screwed on to the valve spindle. To close the valve this handwheel is
screwed down until it comes in contact with a collar or bridge piece, and by con-
tinuing to turn the handwheel, the spindle is raised and this draws the internal
valve against its sent which effectually closes the valve. By screwing the
handwheel back some distance the reverse action takes place and the valve can be
placed full open.
When the handwheel is midway between the "closed" and "full open" positions
it and the spindle are free to inove up and down for a short distance, and in this
position it acts as a reducing valve.
Dated this 3rd day of November 1890.
ROBERT CHARLTON,
COMPLETE SPECIFICATION.
Improvements in Reducing Valves.
ROBERT CHARLTON Manors Newcastle-on-Tyne Brass Founder 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 improvements in reducing valves which are used to
reduce the pressure of steam or other fluids passing through them.
The invention may be described by reference to the drawing which accompanies
this Specification and the description which here follows.
A is the valve body. B is the internal valve which closes against the seats X.
This internal valve may be any form of equilibriumn valve the form shown is pre-
ferred. C is the spindle which is attached to the internal valve and has a land
wheel F screwed on to its outward end. This hand wheel F has a long boss or
sleeve attached to it with collars G and G which form an important part of the
arrangement. It will be noticed that these collars are standing clear above &
below the rigid bridge E.
Now if the hand wheel is screwed down the spindle,
the collar (which may be called the top collar) will come into contact with the
bridge, and if the hand wheel is still continued to be screwed it will now draw up
the spindle and bring with it the internal valve B until this is closed against its
seat X. In this manner the valve may be effectually shut and act as a stop
valve.
If however the hand wheel is turned in the reverse direction the bottom collar G
will be brought into contact with the bridge, the internal valve will retreat from its
seats and may be screwed "full open" and retained there.
When the arrangement is used in its ordinary duty as a reducing valve the
collars G and G are placed clear of the bridge as shewn on the drawing, so that these
and the spindle may rise and fall the short distance necessary.
The arrangement for opening and closing the valve may be modified as for
instance the hand wheel may be placed on the spindle between two rigid bridges

page_text: or projections so that when it is screwed up against say the top bridge the spindle
will be depressed, or when it is screwed the reverse way it will come into contact
with the bottom bridge and the spindle will be drawn up.
The invention also dispenses with the usual piston arrangement which is in so
many reducing valves, as with the internal valve B of an equilibrium or approximate
equilibrium form the pressure acting on the area of the spindle is sufficient to
actuate the valve.
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
A reducing valve as described and more particularly
1st. Arrangement to open and close the valve.
2nd. Using the spindle only instead of the ordinary piston arrangement.
Dated this 9th day of May 1891.
ROBERT CHARLTON.