Improvements in Regulating or Reducing Valves.
Year: 1889

page_text: Date of Application, 24th Sept., 1889-Accepted, 23rd Nov., 1889
COMPLETE SPECIFICATION.
Improvements in Regulating or Reducing Valves.
1 BENJAMIN WILLOOX of 47 Lincolns Inn Fields in the County of Middlesex
Patent Agent do hereby declare the nature of this invention which has been communi-
cated to me from abroad by Julien Belleville of St. Denis (Seine) in the Republic
of France Engineer and Officer of the Legion of Honour 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 regulating or reducing valves for
obtaining a regular or uniform pressure. Three types of valves are hereinafter
described and illustrated in the accompanying drawings as examples of the construc-
tion and operation of these valves according to the present invention.
These types are as follow
--
1. For working in combination with land engines or engines other than marine
engines.
2. For working in combination with marine engines.
3. For working in combination with engines erected in places where the reducing
valve has to be inverted owing to there not being sufficient space to place it in the
usual position.
And in order that the said Invention may be fully understood. I shall now proceed
more particularly to describe the same and for that purpose shall refer to the several
figures on the annexed sheet of drawings the same letters of reference indicating
corresponding parts in all the figures.
Figures 1, 2 and 3 illustrate, the type of regulator employed with engines other
than marine engines.
Figure 1 is a side elevation, Figure 2 is a vertical section on the line X-X figure 1,
and Figure 3 is a horizontal section taken along the line Y Y figure 2.
Figure 4 illustrates in elevation the type of regulator employed for marine engines
and Figure 5 illustrates in like manner the arrangement in which the apparatus is
inverted.
Certain parts which are common to all these types of valves are distinguished by.
A¹ is an
letters and figures of reference as follow. A is a cast iron body or case.
internal space or chamber in this case constructed with a cylinder or division or
partition B. a.is the steam induction passage and a' is the eduction passage. 1 is a
cover closing an orifice provided for giving access to the interior of the valve casing,
B is a balanced piston valve controlling the passage of steam through the division or
partition B and provided internally with a pendent-screen or deflector t. bare ports
or orifices in the valve B situated laterally with regard to the direction of the entering
steam, B is a brass or gun metal seat or cylinder in which the piston valve B works
and is fitted tightly in the support B¹ at 2. are parts in the seat B' being
arranged laterally so as to coincide with the ports in the piston valve B.
The steam supplied through the pipe or induction passage at a enters the space
surrounding the cylinder B and passing through the ports in this cylinder and
through the corresponding ports & in the piston valve descends in the latter and passes
into the eduction passage a¹. C is a piston or plunger at the lower part of which is
suspended the hollow piston or lantern shaped valve B hereinbefore described. c is a
connecting link with the pins or pivots of oscillation arranged at right angles and
connecting the valve B to the piston C. C is a stuffing box lined with Belleville-
antifriction paste, and G is a seat for a safety valve (not shown in the drawing)
provided on the eduction passage a' and limiting the pressure of the expanded steam.
This regulating or reducing valve operates as follows:-
The piston is loaded either by means of a counterweight or springs which are

page_text: adjusted according to the pressure at which the steam is to be delivered. The steam
after passing through the valve B enters the passage a¹ and acts under the piston C
which is depressed by the adjustable weight or load. When the pressure rises beyond
the normal limit in the eduction passage the pressure of the load on the piston Cis
for the moment insufficient to counterbalance the pressure of the steam so that the
piston C is forced upwards and raises the piston valve B.
The area of the passages formed by the ports in the piston and in its seat or
cylinder B is consequently contracted in proportion as the piston C is elevated and
the volume of steam passing through these ports into the eduction passage al is
consequently diminished until the normal pressure is restored in the said eduction
passage.
On the other hand when the pressure of the expanded steam in the passage a!
diminishes, the action of the load on the piston C preponderates and this piston
gradually descends into the valve case so as to lower the piston valve B and enlarge
the sectional area of the passage through the ports. By these means the delivery. of
steam is increased until the normal pressure is re-established in the eduction
passage.
The arrangement specially intended for use with engines other than marine engines
is illustrated in Figures 1, 2 and 3. The parts peculiar to this construction are as
follows-
D is a lever by means of which the pressure of the regulating weight or other load
is transmitted to the piston C. d is a radius rod or arm forming a point of support
for the lever D and is a guide and stop limiting the movements of the said lever.
D' is the centre or steel knife edge by which the lever acts through steel V pieces on
the piston C. A weight suspended at E forms the adjustable part by which the load on
the piston C can be regulated by increasing or diminishing the number of discs or
pieces composing the weight. F is a spring forming a fixed part of the load on the
piston or which may be adjusted by means of a hand wheel . The addition of
springs to the weights is for the purpose of regulating the movements of the piston C;
if the weight were employed alone these movements would be liable to be too abrupt
or sudden and the ports through which the steam escapes would be too quickly opened
or closed in consequence.
The steam regulating or reducing valve for use with marine engines is illustrated in
Figure and is constructed with an arched or stirrup piece I attached by
screws 3, 3, 3, to the upper part of the valve case A. The piston C passes through the
upper part of the piece H which acts as a guide. Lis a bar or yoke attached to the
upper part of the piston C. To this yoke are connected the springs J which act on
the said piston. A ring is provided on the head of a bolt-4 to facilitate the extraction
or removal of the valve B when required. The stroke of the piston is limited in one
direction by a shoulder on this piston and in the other direction by the yoke I, these
parts coming in contact with the guide H.
The tension or pressure exerted on the piston C by the springs J is not affected by
the rolling or pitching of the vessel which would interfere with the action of the
weights employed with the valves for land engines. K is a lower yoke carried by a
screw L and forming points of support for the springs. J. This yoke K is guided
by rods attached to the hand hole cover 1. L is a screw for imparting the necessary
tension to the springs J. The screw bears against a support M. on the cover I and
engages with a female screw in the yoke K. The sail screw is further supported
by a bar L' attached to the ends of the guide rods and is rotated by means of a
hand wheel. The springs J are of such length that the change in their tension
resulting from a movement of the piston C from one end of its travel to the other
corresponds with only a slight modification in the pressure of the expanded steam.
The inverted regulating valve illustrated in Figure 5 is provided with springs M
acting on the piston and connected at one end to a fixed point of support on the
cover 1. N is a yoke attached to the opposite end of the springs. This yoke is
provided with a swivel uut 5 working on the screw P. nn are rods attached to a
flange on the enlargement of the valve chamber or case A. n' is a cross bar on

page_text: the ends of the rods n n and acting as a guide for the screw P which is employe d
to regulate the tension of tho springs M. The ond of this screw boars against the
head of the piston C. This screw is rotated by means of a hand wheel p. Qis a
transverse bar attached to the end of the piston C and sliding on the guides n n.
This bar enables the piston C to be guided in a straight line and prevents it from
rotating. R is a plug by means of which access can be obtained to the interior of the
parts about the piston C and S is a cock for blowing off water of condensation from
the valve case A. The travel of the piston is limited by the transverse bar a bearing
against a shoulder 6 on the screw P and against the boss 7 of the hand wheel p. The
swivelling arrangement of the nut 5 enables the yoke N to deflect and accommodate
itself to the resistance of the several springs so that all of the latter may have the same
tension. The pull of these springs is consequently always exerted exactly in the
direction of the axis of the screw P and consequently in the direction of the axis of
the piston C. The guide rods n n fit loosely in the yoke N in order to allow the latter
sufficient freedom of motion.
Having now particularly described and ascertained the nature of this said
invention and in what manner the same is to be performed I declare that what I
claim is :-
1. The regulating or reducing valve as arranged for working in combination
with land engines (Figures 1, 2 and 3) or for working in combination with marine
engines (Figure 4) or for working in an inverted position (Figure 5) all substantially
as hereinbefore described and illustrated in the accompanying drawings.
2. The combinations and arrangements of parts constituting the improvements in
regulating or reducing valves substantially as hereinbefore described with reference to
the accompanying drawings.
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