IM- PROVEMENTS IN APPLIANCES FOR REGULATING THE SPEED OF STEAM AND OTHER LIKE ENGINES
Year: 1874

page_text: LETTERS PATENT to Ivic Mackie MacGeorge, of North Ormesby,
Middlesbrough, in the County of York, for the Invention of "IM-
PROVEMENTS IN APPLIANCES FOR REGULATING THE SPEED OF STEAM AND OTHER
LIKE ENGINES."
Sealed the 21st April 1874, and dated the 18th February 1874.
PROVISIONAL SPECIFICATION left by the said Ivie Mackic Mac-
George at the Office of the Commissioners of Patents, with his
Petition, on the 18th February 1874.
I, IVIE MACKIE MACGEORGE, of North Ormesby, Middlesbrough, in
the County of York, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN APPLIANCES FOR REGULATING THE SPEED OF STEAM AND
OTHER LIKE ENGINES," to be as follows:-
The object of this Invention is an arrangement of appliances for
governing the motion of steam and other like engines, marine and
stationary, whereby great sensitiveness of action giving positive control

page_text: over speed is produced particularly when fitted to engines subject to
sudden strains from variable loads.
The appliances are composed of a balanced disc or wheel, plain or
weighted, or provided with blades which can be set to any desired angle,
such disc or wheel being attached to sockets and a portion of which is
threaded to ride upon a threaded portion of the governor spindle, and rise
and lower thercon to close and open the valve by acting upon the valve
lever in the manner well-known.
The portion of the spindle bolow the disc or wheel is of smaller
diameter than the threaded portion, and is encircled by a spring borne
upon by a collar (formed by the threaded portion being of larger
diameter) to keep the disc socket to the lower end of the spindle if the
spindle be fitted vertically.
The spindle is stepped or otherwise arranged in brackets, and the disc
or wheel with the sockets are rotated by pulley or by gearing, the nip of
the spring being such that any tendency on the part of the engine to race
causes the spindle to travel faster than the disc or wheel, and the disc
or wheel to rise upon the threaded portion of the spindle, and to thereby
lift the sockets and operate the lever for shutting off or diminishing the
area of the steam inlet aperture, the disc or wheel rising in proportion
to the increased speed imparted to the spindle until the lesser supply of
steam brings the engine to its normal state of velocity.
The main advantages of this Invention are,-
1. Absolute control over speed.
2. Simplicity and compactness.
3. It possesses no parts liable to get out of order, and entirely dispenses
with working joints or levers.
4. Accuracy and sensitiveness of action rendering it a thoroughly

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Ivie Mackic MacGeorge in the Great Seal Patent
Office on the 18th August 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, IVIE
MACKIE MACGEORGE, of North Ormesby, Middlesbrough, in the County
of York, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eighteenth day of February, in the year
of our Lord One thousand eight hundred and seventy-four, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Ivie Mackie MacGeorge, Her special
licence that I, the said Ivic Mackie MacGeorge, my executors,
administrators, and assigns, or such others as I, the said Ivie Mackie
MacGeorge, 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 APPLIANCES FOR REGULATING THE SPEED OF STEAM AND
OTHER LIKE ENGINES," upon the condition (amongst others) that I, the
said Ivic Mackic MacGeorge, my executors or administrators, 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 Inven-
tion, 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 Ivie Mackie MacGeorge, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement thereof, that is to say :—
The object of this Invention is an arrangement of appliances for
governing the motion of steam and other like engines, marine and
stationary, whereby great sensitiveness of action giving positive control
over speed is produced, particularly when fitted to engines, subject to
sudden strains from variable loads.

page_text: The appliances are composed of a balanced disc or wheel, plain or
weighted, or provided with blades which can be fixed or set to any
desired angle, such disc or wheel being attached to sockets and a portion
of which is threaded to ride upon a threaded portion of the governor
spindle, and rise and lower thereon to close and open the valve by acting
upon the valve lever in the manner well-known.
Below the disc or wheel I arrange a collar with a pin through it and
through a slot in one part of the spindle, the collar being in connection
with a threaded adjustable pin or rod, and by which the tension of a
spring is sett. The slotted portion of the spindle is of smaller diameter
than the threaded portion, and is encircled by the spring borne upon by
the collar to keep the disc sockets to the lower end of the spindle if the
spindle be fitted vertically.
The spindle is stepped or otherwise arranged in brackets and the disc
or wheel with the sockets are rotated by pulley or by gearing, the nip of 1
the spring being such that any tendency on the part of the engine to
race causes the spindle to travel faster than the disc or wheel, and the
disc or wheel to rise upon the threaded portion of the spindle, and to
thereby lift the sockets and operate the lever for shutting off or
diminishing the area of the steam inlet aperture, the disc or wheel 2
rising in proportion to the increased speed imparted to the spindle until
the lesser supply of steam brings the engine to its normal state of
velocity.

page_text: Figure 2 represents a general sectional elevation of the apparatus
wherein the spindle A is carried as before-mentioned on the frame B
(Figure 1). This spindle is screw threaded as shown (at c, c, c). The
eye of the boss of the balance wheel is also screw threaded to work freely
upon it.
The attachments f, f', are hollow chambers suitably attached
to the wheel C (or made in one casting with the wheel), as for example,
by screw threads shown at g, g¹. These chambers form as it were a part
of the balance wheel C and revolve with it, the upper portion working
the rods (which communicates with the throttle valve) by means of the
lever E for example. The lower chamber contains a spiral spring /
which by its elastic action tends to keep the governor in its lowest
position as shown in this view (Figure 2). On the upper end of this
spring is placed a loose washer K having a free motion on the spindle A.
This washer has a pin v attached to or passed through it, which pin has
a free motion up and down the slotted portion (of the spindle) as in
Figure 2*. The centre of this pin is screwed to receive the screwed
portion of the adjusting screw J, the spindle A being hollowed out (as
shown by the dotted lines) to freely admit this screw.
Thus by turning
the screw J (say with a spanner applied to the head 1), the washer is
drawn down, compressing the spring at the same time to any required
degree. The more the spring his compressed the greater difficulty has
the "governor" in effecting an upward movement upon the screwed part
of the spindle A and vice versa. By this means a high or low speed of
engine is obtained, as when the spring is fully compressed the upward
movement above mentioned is reduced, thus keeping the valve more

page_text: "
governor" become independent of each other, and the wheel revolving
at a slower velocity than the spindle instantly ascends and closes the
throttle valve. As long as this increased velocity of spindle continues
the governor will remain in its high or upper position as it (the governor)
cannot descend till its velocity exceeds that of the spindle, which said
excess of velocity takes place instantly upon the speed of the engine
becoming reduced. This latter motion of the governor causes the
valve immediately to open, thus maintaining a perfectly even speed
throughout.
Figure 3 shows the balance wheel (c) having enlarged webs C¹ cast
(or otherwise fixed) thereon. These "webs" extend beyond the
periphery of the wheel so as to offer resistance to the atmosphere, and
Figure 4 shows how I arrange the nut and threaded end of the web in
the periphery of the balance wheel; this method being more suitable in
some cases for adjusting the velocity of rotation of the wheel..
Figure 5 represents in sectional elevation a balance wheel upon a
horizontal spindle, the lever E being drawn to and fro by the travel of
the socket upon the threaded portion of the shaft.
I do not limit myself to the use of a collar or ring or the spring to
bear against, as in some cases the spring can bear against the brasses of
the blocks, or in other suitable manner so long as the wheel becomes
balanced upon the threaded portion of the spindle, and be there retained
while the engine is running at one uniform speed, and the wheel be
capable of rising or falling to close or to open the steam passage of the
throttle or the slide valve as the case may be, as the action of the engine
is more or less taxed by the work under operation.
And having now described the nature of my said Invention and in
what manner the same is to be performed, I declare that I claim,―
Firstly. The combination of appliances acting in unison as herein-
before set forth and shown for regulating and controlling the speed of
steam and other like engines.
Secondly. I claim in connection with governors or regulators a balance
wheel or disc having the eye of the boss screwed to move along a
threaded portion of a spindle, such spindle being rotated by an engine,

page_text: and to thereby cause the wheel to act upon the valve and open or close
the steam passage as set forth and shown in the Drawings.
In witness whereof, I, the said Ivie Mackie MacGeorge, have
hereunto set my hand and scal, this Fifteenth day of August,
in the year of our Lord One thousand eight hundred and seventy-
four.
IVIE MACKIE MACGEORGE. (L.S.)