IMPROVEMENTS IN STEAM ENGINES AND APPARATUS CONNECTED THEREWITH
Year: 1875

page_text: LETTERS PATENT to George William Weatherhogg, of Swinderby, in
"
the County of Lincoln, Mechanical Engineer, for the Invention of
"IMPROVEMENTS IN STEAM ENGINES AND APPARATUS CONNECTED THEREWITH.'
-Partly a communication from abroad by Esau D. Taylor, of
Jersey City, Hudson County, U. S. America.
PROVISIONAL SPECIFICATION left by the said George William
Weatherhogg at the Office of the Commissioners of Patents, with
his Petition, on the 22nd June 1875.
I, GEORGE WILLIAM WEATHERHOGG, of Swinderby, in the County of
Lincoln, Mechanical Engineer, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN STEAM ENGINES AND APPARATUS CONNECTED
THEREWITH,” to be as follows, that is to say :-

page_text: plates nearer together, the steam itself keeping the latter on their faces,
the said wedges allowing for priming.
Secondly. In constructing the slide valves of compound engines so
that they may conduct the high-pressure steam through the valves into
the low-pressure cylinder, and permit the valves to work against each
other frictionless as above described.
Thirdly. In constructing steam chests of compound engines so that
the throttle or regulating valve box may be formed in or attached to the
chest, and connected or not to an admission valve which is also placed
in the steam chest for admitting live or dry steam into the low-pressure
valve, and mixing with the wet or low-pressure steam before entering
the low-pressure cylinder, the admission valve being under the control
of a governor or not as desired.
Fourthly. In constructing a balanced valve with circular or segmental
plates and having a reciprocating and partial rotary motion imparted to
the same (by the action of a governor), which acts as an induction and
eduction valve, and to a certain extent varies the cut off without the use
of a separate expansion valve; also in connecting the back plates of
circular, segmental, or piston valves, so that the same may have a
partial rotary and reciprocating motion, which will vary and regulate
the admission of steam into the valve chest in place of using an extra
throttle or other valve.
.
Fifthly. In constructing the stop and regulator valves of a steam
engine so that they may work entirely frictionless, and by means such
as those above described at all times compensate for wear, and keep the
valve steam-tight under all pressures.
In carrying out the first part of my Invention I construct on the back
of an ordinary slide or rocker valve a circular flange or flat lugs, which
interlock into corresponding flanges or lugs on the inner side of a back
or rubbing plate, the latter having a corresponding area of steam surface
to the valve. Through each side or cheek of the flanges or lugs I cut
in a line parallel to the line of motion circular, square, or other shaped
openings, the latter being some distance from the outer edge, allowing
sufficient metal on the edges of the flanges or lugs to withstand the
strain of the valve and back plate when under steam. Through these
openings is passed a tapering wedge key which fits on or forms part of

page_text: the valve rod. I also elongate the holes through the flanges or lugs on
the nearest side to the valve and back plate. The tapering wedge key is
adjusted by lock nuts on one or each side of the flanges or lugs, or the
same may be made to pass through a strap or yoke for the purpose of
carrying the valve. The elongated openings cut in the flanges or lugs
as aforesaid serves to allow the valve to relieve itself from back pressure
by priming or otherwise, and for adjustment.
The essential features of this part of my Invention are that by setting
up the wedge key the valve and rubbing or back plate faces are drawn
from their seats, whilst by moving the wedge key in the contra direction
the steam acting on the back of the valve and back plate presses them
on their respective faces, so that by proper adjustment the valve may be
set so as to work entirely frictionless, it being impossible at any time to
jamb the valve against the seatings by the action of the wedge and
the interlocking of the valve and back plate upon the wedge key.
When flat valve facings are used for double or compound cylinders, the
back plates being carried by and forming a part of each valve will work
against each other frictionless, the valves releiving the cylinders from
any back pressure as before described.
In some cases I prefer to use a partition plate which may be cast on
the steam chest or suspended by any suitable means to the same, it not
being necessary to be larger than the area and travel of the valve com-
bined. I also use circular faced or segmental valves constructed on the
same principle for double or compound cylinders in combination with
the partition plate when desired.
In some cases instead of placing the wedge key parallel to the line of
motion I affix the same or a stud bolt having one end secured to the
valve at right angles to the valve spindle which is connected to the
valve by a strap or yoke. The key or stud bolt passes through the back
plate with a regulating nut or its equivalent on the outer edge, a recess
being made in the plate so that the same may work to its face without
interfering with the nut. The steam presses both valve and back plate
to their respective faces as in the former method.
Another improvement in slide valves consists in keeping the pressure
from off the back of the valves by the use of a stationary rubbing plate
or plates, applicable to both double, compound, and single cylinder

page_text: engines, which are constructed as follows:-For double cylinder engines
I use two rubbing plates, with circular or flat lugs interlocking each other,
with a wedge tapering key as before described. I place these rubbing plates
between the valves and cast suitable stops in the steam chest for holding
the plates in position. One end of the wedge key forms a short spindle,
screwed at the end, which passes through a sleeve to the outer end of
the steam chest and has a locking device for adjusting and regulating
the pressure of steam on the valves which can be adjusted whilst the
engine is in motion. When this plan is adopted I use the ordinary valves.
When it is desired to use the same for compound engines I cast passages
in the valves and corresponding passages in the back or rubbing plates,
and preferably make the flanges of the plates circular, with a steel or
other packing ring placed around or recessed into the flanges for
preventing the steam entering between the plates. For single cylinder
engines I use only one back plate, and cast lugs on the steam chest
cover or side, which correspond and interlock with the lugs on the plate
and use the tapering wedge key and sleeve with the locking device
acting as before stated. Steel or other springs may or may not be placed
between the back plates, for keeping them to their faces during the
periods that the steam is not admitted into the chest, and the same may
in some cases be used where I employ the back plate and valve
combined.
The improvements in the second part of my Invention relate to
compound engines only, and consists in using the valves with the
combined back plates and tapering wedge keys, more particularly
described in the first part of my Invention. I use the circular flanges
and also a steam packing ring around the same for preventing the high
pressure steam entering between the plates and the valves. I cast
passages through both valves and corresponding openings through the
back plates which conveys the steam from one cylinder to the other and
thence to the condenser or atmosphere. Steam is first admitted into the
chest in the usual manner, passes into the high-pressure cylinder, thence
through the valves as aforesaid. I combine a sleeve and strap or yoke
to each valve through which the spindle passes connected to the wedge
key, the sleeve and spindle both pass through the steam chest working
in suitable stuffing boxes. On the outer end of the sleeve and spindle I
affix lock nuts or an equivalent device for adjusting the valves; I
cover the parts projecting through the chest by any suitable device.

page_text: When it is desired to blow the cylinders through, the covers last
spoken of are removed, and the lock nuts, or their equivalents (when
turned), press the wedge keys through the valves and other devices,
causing the same to leave their seats sufficiently to allow the steam to
pass. When by the reverse movement of the wedge key the pressure of
steam will move the valves to their faces ready for work, I connect the
yoke or strap to the valve rods in the usual manner. By this method
of blowing through the complication of the usual pipes and cocks used
for the purpose in marine engines is avoided; also the placing on the
cylinders of additional relief valves is avoided by the self-acting relief
adjustment of the slide valves, which methods effects considerable saving
in first cost, and wear and tear of engines.
In carrying out the third part of my Invention I use a seperate steam
chest or valve box, which may be seperate or form one casting with the
steam chest, the chest having two seperate chambers, one containing an
ordinary throttle or wing valve or one of my improved regulating valves,
which will be more fully spoken of hereafter, and the other an
admission valve for working the low-pressure cylinder with high-
pressure steam when required. I place these two valve spindles in a
line with each other, and connect the two together by a sleeve or other
suitable device. Steam passages communicate with the main steam
pipe into the regulating valve chamber, and from thence the steam
passes into the steam chest, after which it passes through the high-
pressure cylinder and valve, through the steam box, and then through
the low-pressure valve into the low-pressure cylinder, after which it is
disposed of as before stated. I cause a communication to be made
between the steam chest and the admission valve chamber, and cast
suitable openings in the same which leads into the passage in the valve
box for the low-pressure steam. I connect one end of the admission
valve spindle to any moving part of the engine which may transmit an
intermittent or reciprocating motion to the admission valve. I prefer
to make the latter with circular faces and edges cut askew, corre-
sponding to similar openings in the "admission valve chamber." I
connect the regulator valve spindle in any suitable manner to the
governor, the operation of which is as follows:-When the governor
regulates the admission of steam into the steam chest for the high-pressure
cylinder, the same movement of the valve spindles will regulate the
supply of high-pressure steam to the low-pressure cylinder by giving

page_text: the intermitting valve a partial rotary motion, causing the passages in
the intermitting chamber to close sooner or later during each portion of
the stroke.
Although preferable to give the admission valve a partial rotary
motion, yet it is not absolutely necessary as the same may be stationary {
or connected with the governor only, having suitable passages cast in
the "admission chamber;" or the valve may be closed altogether without
mixing the high and low pressure steam. Although preferable to use
a similar valve to the high-pressure regulator for the admission valve,
yet it is obvious that in both cases any form of valve may be used with 1
or without being attached to the governor.
The fourth part of my Invention consists in using the balanced
valves, herein-before spoken of, with circular segmental faces, working
in a corresponding steam chest, which may be used as rocker valves or
have the reciprocating eccentric motion with cylinder passages cast 1
askew or otherwise. I connect the valve spindle to the governor with
ány suitable device, when the governor will impart a partial rotary
motion to the (main) valve, by which means the steam will be cut off
earlier or later, as with an expansion valve.
In some cases I prefer to use the valve rubbing plate for effecting the
cut off, and to effect the same I cut a passage in the steam chest and a
corresponding passage in the back or rubbing plate, through which the
steam is admitted. When the latter plan is adopted no other throttle
or regulator are required.
. The fifth part of my Invention consists in adopting the wedge and
key compensating movement, herein-before spoken of, to stop and
regulator valves for steam engines, which may have either flat or
circular faces and a reciprocating or rotating motion for regulating the
admission of steam. I shape the cases of the valves to suit the require-
ments for which they are needed, allowing one end of the whedge key
to form a spindle projecting through the case, working in a suitable
stuffing box, and I attach to the spindle suitable fixings for moving the
valve.

page_text: sluice valves or otherwise. Also when slide valves are made on this
principle they may be worked with a seperate expansion valve, if
desired.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said George William Weatherhogg in the Great Seal
Patent Office on the 22nd December 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
WILLIAM WEATHERHOGG, of Swinderby, in the County of Lincoln,
Mechanical Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent bearing date the Twenty-second day of June, in the year
of our Lord One thousand eight hundred and seventy-five, in the
thirty-ninth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said George William Weatherhogg,
Her special licence that I, the said George William Weatherhogg, my
executors, administrators, and assigns, or such others as I, the said
George William Weatherhogg, my executors, administrators, and
assigns, should at any time agree with, and no others, from time
to time and at all times thereafter during the term therein expressed,
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for "IMPROVEMENTS IN STEAM ENGINES AND
APPARATUS CONNECTED THEREWITH," upon the condition (amongst others)
that I, the said George William Weatherhogg, my executors or admini-
strators, by an instrument in writing under my, or their, or one of
their hands and seals, should particularly describe and ascertain the
nature of the said Invention, and in what manner the same was to
be performed, and cause the same to be filed in the Great Seal Patent
Office within six calendar months next and immediately after the date
of the said Letters Patent.
NOW KNOW YE, that I, the said George William Weatherhogg, do
hereby declare the nature of my said Invention, and in what manner
the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :—

page_text: Firstly. To the balancing of slide and rocker valves by means of back
plates adjusted by wedges or cones, which bring the valves and back
plates nearer together, the steam itself keeping these latter on their
faces, the said wedges or cones allowing for priming.
Secondly. In constructing the slide valves of compound engines,
balanced as above described when used in valves constructed so that they
may conduct the high-pressure steam through the valves into the low-
pressure cylinder, permitting the valves to work against each other, or
against a divisional plate or chamber, or when the said valves are made
to operate seperately in the usual way.
Thirdly. The combination of two balanced valves in compound
engines operated by one governor for regulating the admission of high
steam and the mixture of high and low steam, as herein-after more fully
described.
Fourthly. In constructing a balanced valve with circular piston or
Begmental plates having a reciprocating and partial rotary motion
imparted to the same by the action of a governor, said valve acting as an
induction and eduction valve, which to a certain extent varies the
cut off without the use of a seperate expansion or cut off valve; also
in constructing the back or balancing plate of circular or segmental
"valves when not required for a variable cut off, so that they may
'have a partial rotary and reciprocation motion, as before described, for
regulating the admission of steam to the cylinder in place of using a
throttle valve, and for the purpose of proventing wiredrawing of tho
steam.
Fifthly. In constructing the stop and regulator valves of steam
engines, so that they may work entirely frictionless by means such as
those above described, and at all times compensate for wear, and allow
the said plates to be turned round or drawn from their seats more readily
and without damaging the valve facings or seatings.
And in order that my 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.

page_text: Figures 1 and 2 shews a balanced variable cut off valve having circular
segmental faces, part shown in plan and part in section. A is the valve
spindle for actuating the valve, which works through a stuffing box in
the usual manner; B is the adjusting wedge or cone, which is screwed
into the strap or yoke C; D is the induction and eduction valve; and E
is the balancing or regulating plate. On the inner sides of the valve
and regulating plate are cast circular rings or projections e, which fit
into each other, and also within the yoke or strap C. Through these
circular rings at some distance from their outer edge are cut suitable
openings for allowing the wedge or cone B to pass through into the
yoke O towards the end of the valve spindle. By these means the valve
and balancing plate interlock each other upon the wedge B. The holes
cut through the rings being slightly elongated allows the valve to relieve
itself from any back pressure in the cylinder caused by priming. The
wedge B is secured in position by the lock nut F.
The action of the wedge is as follows:-When the same is screwed
into the yoke C it draws the valve and balancing plate from their
seatings; when screwed in the contra direction the steam, at all times
acting on the back of the valve and balancing plate, forces them against
their respective seatings. The valve in the latter case would work with
full pressure of steam on the cylinder facings, whilst by proper adjust-
ment the valve with the balancing plate may be set so as to work
entirely frictionless. A spring d may or may not be used, as shewn, for
the purpose of keeping valve to its seating.
In order to use the valve above described as a variable cut off I cast
the outer edges of the induction passages in the cylinder askew, and out
the lap or cutting edges of the valve to correspond. I also cast the
exhaust passages in the cylinder and valve vertical or at right angles to
the valve spindle, and let the valve spindle work through a bush or other...
} suitable device which cannot turn without the valve, said bush forming a
guide to the valve spindle. On this bush I connect a lever or its
equivalent to the governor, the action of which is as follows:-As the
governor works the lever or its equivalent, the action causes the valve to
partly rotate, and thus cuts off the steam earlier or later, as may be
5 required. The exhaust passages are cast vertical or at right angles to
the line of motion, and with a constant travel- of the valve the com-
pression and release of the exhaust is always constant. The same prin-
ciple applies to a fixed cut off variable by hand in the usual manner.

page_text: When it is desireous to use this valve without a variable cut off motion
for regulating the admission of steam to the cylinder, in place of using
a throttle valve I cut an opening for the admission of steam from the
boiler at or about the centre of the steam chest, as shewn by the indi-
cation of the arrows in the sides of the chest marked G. This opening
is of sufficient capacity to admit the full quantity of steam required for
driving the engine. A corresponding elongated opening is also cut in
the balancing plate, as shewn atf. I also connect the valve spindle to
the governor, as before described. The action of the slide valve and
balancing plate will regulate the necessary amount of steam passing
through the opening G to drive the engine. The wedge adjustment for
balancing the valve and regulating plate also provides for the relief
of water, and any wear which may occur to either valve or back plate.
When the latter plan is adopted the steam passages may be cast in any
position in the cylinder with the lap edges of the valve to correspond.
Figures 8 and 4 shew a balance cut off valve with flat faces, part in plan
and part in section, and with flat lugs which interlock each other upon
the wedge or cone spindles, as herein-before described, for the purpose of
ballancing the valves. A is the valve main spindle; B, the wedges or
cones, which may either be forged on to the spindle or secured to the 1
same seperately by any suitable device; C is the induction and eduction
valve; D, the balancing plate; E³, lock nuts for regulating the adjust-
ment. The steam acting on the inner sides of the valve and balancing
plate, as indicated by the arrows, interlocks them upon the wedges or
cones, as before described. The cut off valve herein shewn is balanced
upon the same principle as the main valve. F are cone nuts, which are
screwed upon the valve spindle with a right and left hand thread in the
usual manner for the purpose of varying the cut off, which may be
worked by hand or the governor as desired. The cut off and balancing
plate are secured upon the cones F by the lock nuts g, which may be §
placed on one or both sides of the plates as required.
'
In some cases I prefer to use the ordinary fixed cut off plates
unbalanced in combination with the balanced valve now described, and
although I only shew the valve with both passages and one exhaust
combined, yet it is obvious that the same may be constructed in two 8
valves, with a separate steam and exhaust passage to each, for the
purpose of lessening the area of the steam passages when desired. The

page_text: cut off plates may be placed on the opposite side to which they are now
shewn.
Figure 5 shews the common slide valve and balancing plate with the
wedge or cone spindle and lock nut adjustment for regulating the
pressure upon the faces, as herein-before described. The spring & may
or may not be used.
Figures 6 and 7 shew elevation and plan of a valve strap or yoke for
balancing valves on this principle, with the valve and balancing plate
removed. The adjustment is effected by means of a transverse wedge
key H passing through the main wedge B on the outer edges of strap
or yoke O, said transverse wedge being adjusted by lock nuts h.
Figure 8 shews part sectional and part plan view of two valves balanced
on the above principle, with their seperate plates E working against a
partition plate or chamber H, said valve being carried in a yoke or
strap, and having the adjusting wedges B screwed into the latter, as
before described.
In order to enable the valves to be adjusted without removeing the
steam chest cover I carry one end of the wedge spindle through the
chest cover, the outer end of said spindle being screwed for the adjust-
ment. I fit a sleve I over the said spindle, one end of which is fitted to
the strap or yoke C. The outer end works in a stuffing box, as shown. .
K are the adjusting nuts for holding the wedge in position; L is a cover
which is fitted over the bush or gland ; for the purpose of preventing
the valves being tampered with, and may be used or not as desired.
The partition plate H has small openings through the same for allowing
any steam which may accumalate under the balancing plates E to pass
through a small pipe, as indicated by the arrow, into the condenser or
atmosphere.
i
. When desired for working compound engines on this principle, the
partition plate or chamber H may devide the steam chest into two
seperate parts for the high and low pressure steam, or the same may
pass through the valves and chamber in the usual manner. In the
latter plan the partition chamber may be placed seperately in the chest,
and secured by any suitable device, the high-pressure steam being
allowed to pass round each valve throughout the steam chest.
In some cases the two balancing plates may work face to face or
against each other without the partition chamber above described.

page_text: Figure 9 shews part plan view of an arrangement for blowing the cylin-
ders of compound or other engines through, and also for the adjustment
of the valves when balanced as above described. M is a continuation of
the wedge spindles, as described in Figure 8; N is a continuation of the
sleve I; O is a strap secured to sleve I; P is a hand wheel for screwing
the cones or wedges B into the yoke or strap 0; R are lock nuts for
setting and adjusting the valves D and plates E. The action of this
arrangement for blowing through the cylinders is effected by turning
the hand wheel P in one direction which forces the valves from their
seats sufficient to blow the cylinders through when by turning the wheel
in the contra direction the steam acting on the inner sides of the valves
and balancing plates forces them against their respective seatings.
It will readily be seen that the lock nuts R coming in contact with
the strap O will prevent any undue pressure being put on the valve
faces by the action of the steam. Springs may be used in some cases for
assisting in forcing the valves to their seatings. By this method of
blowing through the cylinders the complecation of the pipes and cooks
used for the purpose in marine engines may be dispensed with, also the
placing of additional relief valves to the cylinder is avoided, as by the
self-acting relief adjustment of the slide valves the cylinders are free
to relieve themselves of any back pressure by priming or otherwise.
These methods effect considerable saving in first cost and wear and
tear of the engines.
Figure 10 shews a modification of my Invention applicable to double
cylinder or compound engines for the purpose of balancing two common
slide valves working side by side. I use two stationary rubbing or
balancing plates E with circular or other shaped rings or lugs e, inter-
locking each other upon a tapering wedge key or cone B acting as
before described for the valves and balancing plates. I cast suitable
stops S on the steam chest to prevent any end motion of the plates E;
one end of the wedge key B passes through a suitable stuffing box in
the chest cover and has a locking device for adjusting and regulating
the pressure of steam on the valves, as herein-before fully illustrated and
described in Figures 8 and 9; the action of the steam acting on the
plates and valves indicated by the arrows is adjusted as before described.
To adapt this modification to the already known plan of working com-
pound engines by the steam passing through the valves it is necessary

page_text: to make the aforesaid rings steam-tight one within the other, and for
this purpose I insert an ordinary piston packing ring, as shewn at S.
Figure 11 shews section of a balanced eccentric block or plates for
rocking or rotating engines or valves, adjusted with a tapering wedge
key B. The shaft may pass through both, as shewn, or fit steam-tight
on one plate only.
Figure 12 shews sectional elevation of a stop-valve with flat faces,
balanced by means of a back plate and adjusted by a wedge or cone nut
(similar to the out off valve, as shewn in Fig. 3, marked F).
nut f1 has a collar or stop on its lower end and works
spindle T which is supported in a step U.
The cone
upon the
The stop or balancing plate V may either be made of solid metal or
the facings may be fitted with other substances.
The casting W may be made of any suitable form. X are the
adjusting nuts, whereby the described amount of pressure may be put
upon the valve facings by the action of the steam. The steam is
admitted through the opening in the casing, as indicated by the arrows,
and passes and interlocks the stop and back or balancing plate upon the
wedge f 1. The essential feature of this part of my Invention are that
by turning the screw spindle T the cone fl will be drawn towards the
lower collar before it lifts the plates from their seats, by which action
the said plates will be slightly drawn inwards, and will thus be perfectly
equilibriated by the sliding action of the cone wedge, and thus the
working of the valve will be done with more ease, and the wear
and tear of the valve, valve facings, and screw will be reduced to a
minimum.
•
When it is desired to use a staightway passage I cut the opening
direct through the balancing plate and the valve casing; by the latter
arrangement the plates will only be partly equilibriated, or the sliding
wedge arrangement may operate one plate only. In all cases a
spring may be interposed for the purpose of assisting to keep the facings
tight.
Figure 18 shows a modification of my Invention applicable to regulating
valves of steam engines in place of using the common methods now
adopted. Steam is admitted into the valve box in the direction of the
arrows, and passes through each of the inner plates, which are balanced

page_text: by means of wedges or cones, such as herein previously described,
but in some cases I prefer to use two or more passages for the exit of
the steam, and use the inner plates as solid covers. The cone spindle
passes through the stuffing box as shown, the outer end of which is
connected to a governor lever or its equivalent for the purpose of t
regulating the admission of steam to the cylinder. This arrangement
allows for the adjustment of the wear and tear of the valve, and at the
same time works frictionless.
The third part of my Invention herein-before referred to, but which I
have not thought it necessary to illustrate, consists in the arrangement 1
of two circular or segmental balanced regulating valves cach placed in
line on one spindle so as to operate by one governor, but capable
of being regulated by hand seperately, said valves being placed in an
intermeadiate chamber in the main steam chest. The first of the
regulating valves controls the admission of high-pressure steam from 1
the boiler into the steam chest in place of using an ordinary wing throttle
valve, and the second valve is intended for regulating the admission
of high-pressure steam also from the boiler when required to be mixed
with the steam entering the low-pressure cylinder, which it is frequently
found desireable to do by an admission valve for the purpose of 2
temperily increasing the power of the engine. By this arrangement
the single governor will not only shut off the steam from the high-
pressure cylinder, but will also shut off the high steam to the low-

page_text: . The above details must be varied according to the peculiar con-
struction of the machines to which my improvements have to be
applied, and although steam only has been mentioned above it is obvious
that my valves are adapted for any liqued or gas, and may be used for
steam pumps, sludge valves, or for other purposes.
Having now described the nature of my said Invention, and the
manner in which the same is or may be used or carried into effect, I
would observe in conclusion that' what I consider to be novel and
original, and therefore claim as the Invention secured to me by the
herein-before in part recited Letters Patent is,—
First. The balancing of slide and rocker valves by the application of
wedges or cones as described, by means of which the valves and
balancing plates are adjusted and limited whether used as induction,
eduction, or expansion valves.
Second. The construction of induction and eduction valves with
circular or segmental faces acting in combination with a governor or
hand gear,
and formed in the manner described so as to constitute a
variable expansion valve worked with one eccentric or its equivalent.
Third. The construction of circular or segmental induction and
eduction valves, whether combined or seperate, by means of which the
steam is admitted and regulated in the manner described in place of
using the ordinary throttle or baffler valve.
Fourth. The construction of stationary relief plates with wedge, or
cone adjustments as above described applicable to ordinary valves
working back to back, whether used in single or compound engines.
Fifth. The construction of an eccentric block or plates for the purpose
herein described and shewn in Figure II.
Sixth. The construction of stop, blow off, or sludge valves with
single or double cylindrical or flat faces, constructed with wegde or
cone adjustment as described.
Seventh. The construction of a steam regulator or throttle valve
balanced as above described.
Eight. The combination of two valves balanced and constructed as
above described when worked by a single governor for the purpose of

page_text: regulating the admission of high steam to both the high and low
cylinders of compound engines.
In witness whereof, I, the said George William Weatherhogg, havo
hereunto set my hand and seal, this Twenty-first day of December,
in the year of our Lord One thousand eight hundred and seventy- {
five.
GEORGE WILLIAM WEATHERHOGG. (L.S.)
Witness,
WALTER BRUCE ALLEN.