IMPROVEMENT IN COMPOUND STEAM ENGINES
Year: 1884

page_text: HENRY GUY, Engineer, High Street, West Cowes Isle of Wight, Hants do
hereby declare the nature of his invention for AN IMPROVEMENT IN COMPOUND
STEAM ENGINES, to be as follows:-
The improvement consists in so, constructing the connection between the high
and low pressed Slide-valves, the casings or jackets thereof, also in the arrangement
of Steam and Exhaust pipes of the high pressed Cylinder in Compound Engines,
whereby the loss by expansion between the two cylinders, of the exhaust steam
from the high pressed Cylinder is very much reduced; this being effected by
keeping the exhaust passages from this Cylinder, in contact with the high pressed
steam; without exposing the low pressed Slide-valve to the same pressure of steam
as that which is on the Boiler..
The improvement consists in so, constructing the connection between the high
and low pressed Slide-valves, the casings or jackets thereof, also in the arrangement
of Steam and Exhaust pipes of the high pressed Cylinder in Compound Engines,
whereby the loss by expansion between the two cylinders, of the exhaust steam
from the high pressed Cylinder is very much reduced; this being effected by
keeping the exhaust passages from this Cylinder, in contact with the high pressed
steam; without exposing the low pressed Slide-valve to the same pressure of steam
as that which is on the Boiler..
DESCRIPTION OF ACCOMPANYING DRAWINGS.
Fig. 1. is an elevation of the Cylinders of a Compound Engine, or face view of
Slide-jackets.
Fig. 2. is a plan of same when the high pressed Cylinder is removed.
Fig. 3. is the same as Fig. 1. with the Slide-jacket covers removed, shewing a'
back view of Slide-valves.
Fig. 4. is a side elevation of Fig 1.
Fig. 5. is a section through L M, Fig 1; with sections also of Slide-valves and
connections through N O, Fig 3.
Figs 6 & 7, is a face and side elevation respectively of the hollow Slide-valve'
rod or exhaust passage between the two valves.
Fig. 8. is a section of same through P q, Fig 7.
:
Fige D, E and F, is a face view, back view, and elevation respectively, of the
high pressed Slide-valve..
Fig C. is a section of same through R S, Fig F.
Fig G, H, I and K, is a side elevation, face view, back view, and plan
respectively, of the low pressed Slide valve.
Fig J. is a section of same through TU, Figs G and I.
Figs A and B, is a plan and longitudinal elevation respectively of the cylinder C
Fig 1..
Fig 9. is a section of a side elevation of the Cylinders of a Compound Engine
having the Slide-valves between the Cylinders.

page_text: Fig 10 is a plan of the Cylinders of a Compound Engine shewing the arrange-
ment of steam and exhaust pipes combined.
Fig 11. is a section of the exhaust and steam pipes of same.
Firstly Applied to that class of Engine having the high pressed Cylinder placed
upon the low pressed Cylinder, the improvement consists in constructing a hollow
Cylinder between the two Slide-jackets, through which, (a hollow Slide-rod con-
necting the two valves and forming the exhaust passage) works steam tight.
Refering to Fig 1, a, a, is the high pressed Cylinder, 61 6₁, the low pressed ditto,
a² a², bb, the high and low pressed Slide-jacket covers respectively, c¹ is a hollow
cylinder connecting the two slide-jackets, and in which the connection between the
two valves is made to work steam tight, by means of a metallic packing ring, (or
any suitable packing) shewn at (a¹) Fig 5. Fig 2, and d Fig 3, are sections
of c¹ Fig 1.
Refering to Fig 3, (a¹ a¹) is the high pressed Slide-valve, (616) the low pressed
Slide-valve, (c¹ c¹) a hollow Cylinder connecting the two valves and forming a
Slide-rod and the exhaust passage from the high pressed Cylinder to the low
pressed valve, connecting to this valve by the strap (dd) to which strap the main
Slidė-rod is also attached, as at (a & b), Fig 8.
Refering to Fig 4, (a! b) are the fanges of the high and low pressed cylinder
slide faces respectively, (c¹ c) the high pressed Slide-jacket, (e² e²) its cover;
(dd) the low pressed Slide-jacket, (e¹ e¹) its cover.
Both (cc) and (dd) are independent of the Cylinders, and when the main
Slide-rod (e) is withdrawn can be removed from the Cylinders very readily, or by
merely disconnecting the rod from link motion both the jackets and Slides can be
removed bodily; thereby facilitating repairs &c.
The joints of both jacket covers are made to pass through the centre line. of
hollow cylinder (c), Fig 4, by so doing making it steam tight at the bosses (h¹ h');
at the same time it is also readily disconnected.
(g) is the connection for main steam pipe.-
Refering to Fig 5 (d) is a metallic packing ring (or any suitable packing); for the
purpose of making the connection between the high pressed Slide valve and the
hollow Slide-rod or Exhaust passage steam tight; the spring or ring fits in a recess
in the valve as shewn at (a) Fig F.
The arrows (b b).indicates the direction of steam passing from Boiler to top of
bigh pressed piston, the arrows 61 61 61 bi b₁ indicates the direction which the
exhaust takes in its passage to the-low pressed Cylinder...
i
The exhaust of the low pressed Cylinder takes place in the usual way, as shewn
at (b? b) Fig 5.
L
Secondly. Applied to that type of Engine having the Cylinders placed side by
side and with inside slides, or the Slide jackets placed between the two Cylinders;
the drawing Fig 9, shews the general arrangement of parts.
'This is an application of the same principle of high pressed Slide-valve, and
exhaust, passage of. same, as at first described and shewn in Fig 5 of the accom-
panying drawings; modified in construction adapting it to this particular class of
Engine.
Refering to Fig 9, (a a) and (bb) are the high and low pressed cylinders
respectively (aa), (a³ a), is a double Slide-jacket-containing the two Slide-
valves (c¹ c²), a partition (a² a²) separates the exhaust steam from the steam in
communication with the Boiler. (6 62) is the Slide-jacket cover on which is
formed the Cylinder (ba b³), in which, the Cylinder (bb) forming the exhaust
passage from the high pressed slide and connected to that valve as shewn in Fig 5,
works steam tight; in this cover also the exhaust passage is continued to the
receiver or low pressed steam chamber.
The arrow (d) shews steam entering the top of high pressed Cylinder, the
arrows (a d² d² d") indicates the direction of exhaust from the high pressed
Cylinder to the steam side of the low pressed cylinder.
The exhaust of the low pressed Cylinder takes place in the usual way...
.

page_text: (cc) being the steam chamber in communication directly with the Boiler, the
exhaust steam in (d³ d³) is in contact with highly heated surfaces, also (c* c*) being
the low pressed steam chamber or receiver for exhaust the steam it contains is
always in contact with the highly heated partition (a³ a³); thereby increasing its
temperature therefore reducing the loss by expansion effecting this without
exposing the low pressed Slide-valve to the great pressure of steam acting on
the Boiler.
Thirdly. The improvement applied to that class of Engine having the Cylinders
side by side but with what is commonly called outside Slides, consists in so
constructing the exhaust passage from the high pressed Cylinder that the main
steam pipe from Boiler is made to pass through it, thereby, causing the exhaust
steam in its passage from one Cylinder to the other to be always in contact with the
heated surface of steam pipe from Boiler, thereby raising its temperature, con-
sequently the loss by expansion is lessened.
Refering to Fig 10, (a) is the high pressed Slide-jacket, (a¹ a¹) the steam pipe
from Boiler, (a) the low pressed Slide-jacket, (as a³ a³) the exhaust passage from
the high pressed Cylinder, (b) a union nut connecting the main steam pipe to
exhaust pipe.
Refering to Fig 11, (a a) is an independent piece of steam pipe continuing the
steam pipe through the exhaust passage, at (b) is a collar and the bend (6¹ b') a
continuation of the steam pipe screwing into the exhaust pipe, abuts against the
collar (b), thereby making it steam tight at that point; the other end of this pipe
being made steam tight by suitable packing in the space (62) screwed up by the
nipple (c c) which screws into end of exhaust pipe.
The arrows (c¹ c¹ c¹ c¹) indicates the direction of steam from Boiler, those
marked (c2 c2 c2 c²) that of the exhaust from the high pressed Cylinder to the
Slide jacket of low pressed Cylinder.
Fourthly, This last arrangement of steam pipe and exhaust pipe combined is
applicable to the two classes of Engines described in the first & second places it
can also be readily applied to Engines now in existence.
It may also be used in combination with the valves and jackets herein described,
for instance, applying it to that class of Engine described at first and refering to
Fig 1; the cylinder (c¹) could be chambered or jacketed and a connection formed
for attaching the steam pipe from Boiler and so causing still more of the surface of
the exhaust passage to be in contact with the high pressed steam, this application
being in principle the same as that described in the third place.
In its application to that class of Engine described in the second place, having
the valves and jackets, between the two Cylinders placed side by side, refering to
Fig 9, the jacket cover (b3 62) can be formed so that the steam from Boiler would
pass through it and around the exhaust passage (2) before entering the Slide
jacket (cc), this also being the same in principle as that described in the third
place.
Lastly Each of the several arrangements herein described, has for its object, the
raising of the temperature of the exhaust steam in its passages from the high to the
low pressed Cylinders; by its passages being so formed as to be in contact with
the high pressed steam: the particular arrangement and construction of the several
parts herein described and shewn, effecting this without exposing the large surface
of the low pressed Slide-valve to the action of the high pressure steam made use of
in Compound Engines.

page_text: Refering to Fig 3, (a' a¹) is the High pressed Slide-valve, (61 6¹) the Low
pressed Slide valve, (c¹ c') a hollow Cylinder connecting the two valves and forming
à Slide-rod and also the exhaust passage from the High pressed Cylinder to the
Low pressed Slide-valve, connecting to this valve by the strap (d¹ d') to which
strap the main Slide-rod is also attached as at (a and b) Fig 8.
Refering to Fig 4, (a¹ b¹) are the flanges of the High and Low pressed Cylinder
Slide faces respectively; (c¹ c¹) the High pressed Slide-jacket (e² e³) its cover,
(d d) the Low pressed Slide-jacket (e¹ e') its cover, both (c¹ c¹) and (d d) are
independent of the Cylinders and when the main Slide-rod (e³) is withdrawn can
be removed from the Cylinders very readily, or by merely disconnecting the rod
from link motion both jackets and Slides can be removed bodily, thereby facilitating
repairs &c.
The joints of both jacket covers are made to pass through the centre line of
hollow Cylinder (c³) by so doing making it steam tight at the bosses (h' h¹) at the
same time it is also readily dis-connected.
(g) is the connection for main steam pipe, which may be made at any point
either in the hollow Cylinder (c²) or the Low pressed Slide-jacket, both these
parts being chambered to form a steam passage to the High pressed valve.
Refering to Fig 5, (d) is a metallic packing ring (or any suitable packing) for
the purpose of making the connection between the High pressed Slide-valve and
the hollow Slide rod or exhaust passage steam tight, the spring or ring fits in a
recess in the valve as shewn at (a¹) Fig. F. The arrows (b b) indicate the
direction of steam passing from the Boiler to the top of the High pressed piston,
those marked (61 61 61 61 b¹) the direction which the exhaust takes in its passage to
the Low pressed Cylinder, the exhaust of the Low pressed Cylinder takes place in
the usual way as shewn by the arrows (62 6ª).
Secondly Applied to that type of Engine having the Cylinders placed side by
side and with inside Slides or the Slide jackets placed between the two Cylinders;
the drawing Fig 9 shews the general arrangeinents of parts.
This is an application of the same principle of High pressed Slide-valve and
exhaust passage of same as at first described and shewn in Fig 5, modified in
construction adapting it to this particular class of Engine.
Refering to Fig 9, (a a) (bb) are the High and Low pressed Cylinders respec-
tively, (a a¹) (a² a²) (a³ a³) is a double Slide-jacket containing the two Slide
valves (c) and (c²), a partition (a³ a³) separates the exhaust steam from the steam
in communication with the Boiler, (662) is the Slide-jacket cover on which is
formed the Cylinder (63 6³) in which the Cylinder (b* 64) forming the exhaust
passage from the High pressed Slide (and connected to that valve as shewn in
Fig 5.) works steam tight, in this cover also the exhaust passage is continued to
the receiver or Low pressed steam chamber.
The arrow (d) shews steam entering top of High pressed Cylinder, those
marked (dd dd2 d²) indicate the direction of exhaust from the High pressed
Cylinder to the steam side of the Low pressed Cylinder, the exhaust of this
Cylinder takes place in the usual way.
(cc) being the steam chamber in communication directly with the Boiler, the
exhaust steam in (c* c) is in contact with highly heated surfaces, also (d³ d³) being
the Low pressed steam chamber or receiver the steam it contains is always in
contact with the highly heated partitions (a³ a³) thereby increasing its temperature,
therefore reducing the loss by expansion, effecting this without exposing the Low
pressed Slide-valve to the High pressed steam.
1
Thirdly. The improvement applied to that class of Engine having the Cylinders
side by side but with what is commonly called outside Slides, consists in so
constructing the exhaust passage from the High pressed Cylinder that the main
steam pipe from the Boiler is made to pass through it, thereby causing the exhaust
steam in its passage from one Cylinder to the other to be always in contact with
the heated surface of steam pipe from Boiler, thereby raising its temperature,
consequently the loss by expansion is reduced.

page_text: Refering to Fig 10, (a) is the High pressed Slide-jacket, (a' a) the steam pipe
from Boiler, (a) the Low pressed Slide-jacket (a a³ ³) the exhaust pipe from.the
High pressed Cylinder, (b) a union nut connecting the main steam pipe.
Refering to Fig 11, (a a) is an independent piece of steam pipe a continuation
of steam pipe from Boiler, and placed within the exhaust pipe, at (b). is a collar and
the bend (66) screwing into the exhaust pipe abuts against the collar (b), thereby
making it steam tight at that point, the opposite end being made tight by suitable
packing in the space (62) screwed up by the nipple (c¸c).
2
The arrows (cl cc c) indicate the direction of steam from Boiler, those marked
(cccc) that of the exhaust from, the High pressed Cylinder in its passage to the
Low pressed Slide-jacket.
">'
Fourthly The arrangement of steam and exhaust pipes combined described in
the third place is applicable to both kind of Engines described in the first and
second places, it can also be readily applied to Engines now in existence, in either
case the steam pipe is made to pass through the receiver or chamber for the exhaust
of the High pressed Cylinder, the steam pipe is made to connect to the receiver at
the most suitable and convenient point, this applies to either of the arrangements
described in this specification..
Lastly Each of the several arrangements herein described has for its object the
raising of the temperature of the exhaust steam in its passage from the High to the
Low pressed Cylinder, these passages being so formed that the exhaust is always in
contact with the surfaces of those parts containing, the High pressed steam; the
particular arrangement and, construction of the several parts herein described and
shewn effecting this without exposing the large surface of the Low, pressed Slide-
valve to the action of the High pressure steam made use of in compound Engines..
"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. Connecting the High and Low pressed Slide-jackets. by a Cylinder 'in which
the exhaust passage from the High pressed Cylinder works steam tight.
2. Constructing the connection between the High and Low pressed Slide-valves
so that it forms the exhaust passage for the High pressed Cylinder.
.
3. Constructing the exhaust pipe or receiver for exhaust, so that it contains the
steam pipe which conducts the steam from Boiler to the High pressed Cylinder.
Lastly. The arrangement of these several parts as hereinbefore described, and
shewn in the accompanying drawings.
7
Witness,
ALFRED BILlveres.
HENRY GUY, × his mark.