Year: 1887

page_text: Date of Application, 10th June, 1887
Complete Left, 10th Apr., 1888
Complete Accepted, 11th May, 1888
I, GEORGE SPENCER of 66 Bennett Street Newton near Hyde in the County of
Chester, Mechanical Engineer, do hereby declare the nature of this invention to be as
follows:-
This Invention relates to Valves for reducing and regulating steam pressure, and
has for its object to simplify their construction and to render them more certain in
action.
In carrying out my Invention I employ a rotary valve working within a tubular
recess or chamber, corresponding ports and passages being respectively formed in the
valve and body and so proportioned and arranged that by partial rotation of the valve
it may be more or less opened or closed. This valve is placed on the high pressure or
steam inlet side of the apparatus, and is constructed and arranged in such a manner
as to control by its position the admission of the steam. The position. of the valve is
regulated by a piston capable of working in a short vertical cylinder on the low
pressure or outlet side of the apparatus, the piston and valve being connected by
suitable rods links or levers. To the piston is attached a piston rod which is weighted
by a lever and weight, or by a compressed spring in a similar manner to a safety
valve. I prefer however to use a compressed spiral spring, the compression of which
may be increased or diminished by a screw of fine pitch.
The piston is weighted by means of the sliding weight or by compression or release
of the spiral spring to such an extent that when steam at the desired reduced pressure
is acting upon the underside of the piston the valve will thereby be held in an
intermediate position between fully open and closed. If now the pressure increases or
tends to increase, on the reduced side the piston will be lifted to a greater or less
extent, and simultaneously the valve will be correspondingly closed thereby, and on
the contrary, if the pressure diminishes, the valve will be more widely opened. By
this means a very uniform reduced pressure may be automatically ensured, and the
pressure may be varied at will whilst the apparatus is in action.
WILLIAM E. HEYS,
Agent for the Applicant.

page_text: I, GEORGE SPENCER of 66 Bennett Street Newton near Hyde in the County of
Chester Mechanical 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:-
This Invention relates to valves for reducing and regulating steam pressure and
has for its object to simplify their construction and to render them more certain in
action.
In carrying out my invention I employ a rotary valve working within a tubular
recess or chamber, corresponding ports or passages being respectively formed in the
valve and body and so proportioned and arranged that by partial rotation of the valve
it may be more or less opened or closed. This valve is placed on the high pressure or
steam inlet side of the apparatus and is constructed and arranged in such a manner as
to control by its position the admission of the steam. The position of the valve is
regulated by a piston capable of working in a short vertical cylinder on the low
pressure or outlet side of the apparatus, the piston and valve being connected by
suitable rods links or levers. To the piston is attached a piston rod which is weighted
by a lever and weight or by a compressed spring in a similar manner to a safety
valve. I prefer however to use a compressed spiral spring the compression of which
may be increased or diminished by a screw of fine pitch.
The piston is weighted by means of the sliding weight or by a spiral spring to such
an extent that when steam at the desired reduced pressure is acting upon the under-
side of the piston the valve will thereby be held in an intermediate position between
fully open and closed. If now, the pressure increases or tends to increase on the
reduced side, the piston will be lifted to a greater or less extent and simultaneously
the valve will be correspondingly closed thereby, and on the contrary, if the pressure
diminishes the valve will be more widely opened. By this means a very uniform
reduced pressure may be automatically ensured and the pressure may be varied at
will whilst the apparatus is in action.
The appended sheet of drawings illustrates a convenient manner of carrying my
invention into practical effect.
Fig. 1 is a vertical longitudinal section of the apparatus and Fig. 2 is a plan of
the valve and its connection with the piston, viewed from the under side.
A is the body of the apparatus; B is the steam inlet; C is the valve which works
upon the pivots or trunnions I), E is a connecting rod jointing the valve C to the
piston rod F; G is the piston working in the cylindrical part H. The cylinder H
should communicate with the external atmosphere by a small perforation which may
conveniently be formed through the cover I. K is a spiral spring which I prefer to
employ rather than a sliding weight. This spring abuts at one end against the
collar L and at the other end against the end of the screw M by rotating which in

page_text: one direction or the other, the tension of the spring may be regulated and the
pressure of the steam on the delivery side of the valve be consequently controlled.
The stem of the valve may conveniently be constructed with a forked end or it
The pivot has then, a square part
may have a square transverse perforation.
which fits within the limbs of the fork or in the perforation so that the valve may
have a limited end motion. A spiral spring O is inserted between the square on the
pivot and the valve, and its action tends to bed the valve and to prevent leakage.
As represented in Fig. 1 the valve is shown closed; the pressure in the reduced
side P being supposed to be the working reduced pressure or in excess thereof. On
a diminution of this pressure the action of the spring or weight will force down the
piston and consequently open the valve and admit steam to P in which the pressure
will now increase until it balances the pressure exerted by the spring or weight upon
the piston, when the valve will be partly or completely closed.
In the drawings I have shown one port only, but it is evident that two or more
ports may be used in which case the valve would be constructed with corresponding
openings, as is well understood.
Having now 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 ;-
1. A steam pressure reducing valve constructed and arranged substantially as
herein before described and as illustrated by the accompanying drawings.
2. In a steam pressure reducing valve; the combination and arrangement of a
valve capable of angular motion, a connecting rod, a piston rod, a piston, a cylinder
and a spring or weight; substantially as hereinbefore described and as illustrated by
the appended drawings.
1000