Improvements in Diminishing or Reducing Valves or Surplus Valves for Controlling the Flow of Fluids or Liquids.
Year: 1892

page_text: Date of Application, 1st Dec., 1892
Comple'e Specification Left, 1st Sept., 1893-Accepted, 13th Nov., 1893
PROVISIONAL SPECIFICATION.
Improvements in Diminishing or Reducing Valves or Surplus
Valves for Controlling the Flow of Fluids or Liquids.
I, JOHN JAMES ROYLE of Dalham Works, Great Bridgewater Street,
Manchester, Engineer do hereby declare the nature of my said invention to be
as follows:-
These improvements refer to an invention for which Letters Patent No. 6231
were granted to me on the 30th December 1882 and has for its object primarily
the cheapening of the construction of the diminishing valve therein described in
connection with Fig. 5 on Sheet 4 of the drawing thereunto annexed.
For this purpose I construct the body casting to wholly enclose the working
cylinder n the said cylinder being suspended from the upper part of the casting by
a screwed neck in lieu of being introduced from the outside as seen in the said
Figure 5. To admit of this method of construction the lower part of the casting
is formed with an opening and cover plate. The escape valve which forms an
essential feature in the action of this class of valve is screwed on to the outside of
the casting which is suitably moulded to receive it.
The same tapped hole which serves to receive the neck of the cylinder may be
used to fix the escape valve. In this manner I am enabled to dispense with an
expensive portion of the original valve and at the same time obtain more perfect
jacketing of the working cylinder.
The same method of construction may be adopted in "surplus valves" for
discharging excess steam from high pressure boilers into boilers or pipes carrying
a lower pressure formed after the pattern of Fig. 5 in which the position of the
main valve a is reversed the working portion being employed to open the valve a
instead of closing it as in reducing valves.
Dated this 30th day of November 1892.
JOHN G. WILSON & Co.,
Agents.
COMPLETE SPECIFICATION.
Improvements in Diminishing or Reducing Valves or Surplus
Valves for Controlling the Flow of Fluids or Liquids.
I, JOHN JAMES ROYLE of Dalham Works, Great Bridgewater Street,
Manchester, Engineer, do hereby declace the nature of my said invention and in
what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
These improvements refer to an invention for which Letters Patent No. 6231
were granted to me on the 30th December 1882 and has for its object, primarily.
the cheapening of the construction of the diminishing valve therein described in
connection with Fig. 5 of Sheet 4 of the drawing thereunto annexed.
And in order that my improvements shall be readily understood and carried into
practical effect I have hereunto annexed a drawing of a reducing valve similar to
that shewn in Fig. 5 Sheet 4 of my previous Specification, but constructed in
accordance with my present invention, and I will now proceed to describe
the same with the assistance of the various figures and letters of reference marked
thereon.
In accordance with my invention I construct the body casing A to wholly
enclose the working cylinder (n) the said cylinder being suspended from the upper

page_text: part of the casting by a screwed neck or nipple B screwing into a tapped hole in
the casting as illustrated in lieu of said cylinder being introduced from the outside
as seen in the said Fig. 5.
To admit of this method of construction and allow of the fixing of the cylinder
the lower part of the casting is formed with an opening C and cover plate D as
illustrated.
The spring escape valve E or the dead weight escape valve F (see separate
view) which forms an essential feature in the action of this class of valve is screwed
to the outside of the casting. The same tapped hole which serves to receive the
neck B of the cylinder (n) serving by preference to receive the escape valve.
The casting is suitably moulded to receive the cover or dome H which encloses
the escape valve as illustrated, and the wall of the casting is formed with an
opening G fitted with a pipe for draining the condensed steam.
In this way I am enabled to dispense with an expensive portion of the original
valve and at the same time obtain more perfect jacketing of the working cylinder.
This improved construction of valve permits of the use of an adjusting set
screw screwing through the wall of the casting as illustrated and taking into the
opening J in the cylinder (n). This set screw serves to insure of the more perfect
working of the valve in cases where the piston K is not quite slack enough to allow
sufficient steam to pass above it, a slight turn of the screw serving to uncover the
opening and so permit the steam to pass direct into the space I thus avoiding
the necessity of removing the piston entirely from the valve for grinding purposes
as heretofore.
To prevent any one tampering with the screw after once being set a plug M is
employed as illustrated.
The improved construction of valve may be adopted in "surplus valves" for
discharging excess steam from high pressure boilers into boilers or pipes carrying a
lower pressure formed after the pattern of the said Fig. 5 in which the position of
the main valve (a) is reversed the working portion being employed to open the
valve (a) instead of closing it as in reducing valves.
•
Having thus 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 :-
:-
The improved construction of casing for reducing or diminishing or surplus
valves and means and method of mounting the working cylinder and escape valve
substantially as hereinbefore described and illustrated on the accompanying
drawing.
Dated this 31st dow of Angust 1902
JOHN G. WILSON & Co.,
Agents.