Improvements in Reducing Valves.
Year: 1889

page_text: Date of Application, 20th Mar., 1889
Complete Specification Left, 18th May, 1889-Accepted, 29th June, 1889
PROVISIONAL SPECIFICATION.
Improvements in Reducing Valves.
JOHN MCANELLY 26 Walker Terrace Gateshead Engineer do hereby declare the
nature of this invention to be as follows :—
C is a valve to which is attached a Piston B by means of a connecting link or
Spindle D. A inlet for the high pressure steam or fluid which presses on the Piston B
& also on the underside of the Valve C. The area of the Valve being greater
than the area of the Piston B. The High pressure steam or fluid will thus cause the
Valve C to open & allow the Steam or fluid to pass through the outlet E, & also to
press on the top side of the valve (. Then the pressure on the piston B together
with the excess of pressure on the topside of the Valve C will Cause the valve (to
close, & thus shut off the communication between the inlet A & the outlet E, until
the excess of pressure on the topside of the Valve C is reduced, so that the pressure on
the underside of the Valve C. again opens Valve C. & allows the steam or fluid to
pass. The difference of the Areas of the Piston B & the Valve C being regulated
so as to suit the difference of pressures required between the inlet A & the outlet E.
Any escape past the piston B can be carried away through the Coupling G to any
convenient place or may be carried through passage H into the outlet branch E by
screwing the spindle F down on the Valve C, the communication between the inlet Å
and the outlet F can be closed.
COMPLETE SPECIFICATION.
Improvements in Reducing Valves.
JOHN MCANELLY 26 Walker Terrace Gateshead Engineer 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, reference
being made to the drawing filed with the Provisional Specification
C is a Valve to which is attached a Piston B by means of a connecting link or
spindle D A inlet for the High pressure steam or fluid which presses on the piston B
and also on the underside of the Valve C.
The area of the Valve C being greater than the area of the Piston B. The High
Pressure Steam or fluid will thus cause the Valve C to open and allow the Steam or
fluid to pass through the outlet E and also to press on the topside of the Valve C.
Then the pressure on the piston B together with the excess of pressure on the topside
of the Valve C will cause the Valve to close and thus shut off the communication
between the inlet A and the outlet E until the excess of pressure on the topside of the
Valve C is reduced so that the pressure on the underside of the Valve again opens
the Valve C and allows the Steam or fluid to pass.
The difference of the areas of the piston B and the valve C being regulated so as to
suit the difference of pressures required between the inlet A and the outlet E.
Any escape past the Piston B can be carried away through the Coupling G to any
convenient place or may be carried through passage H into the outlet branch E. By
screwing the Spindle F. down on the Valve C, the communication between the inlet Å
and the outlet E can be closed.
my
Having now particularly described & ascertained the nature of Inven-
tion & in what manner the same is to be performed I declare that what I
claim is.
1st. The reduction of fluid pressure by means of a Valve attached to a Piston by a

page_text: rigid Rod or Link substantially as shewn in the drawing left with Provisional
Specification.
2nd. The High Pressure entering between the Piston & valve as described &
shewn on the drawing.
3rd. The area of the Valve being greater than the Piston so that the pressure will
raise the Valve and allow the fluid or Steam to pass.
Dated this 16th day of May 1889.
JOHN MCANELLY.