MENTS IN APPARATUS FOR CONTROLLING ELECTRICALLY THE MOTION OF STEAM OR OTHER ENGINES
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
Wo, ARTHUR EDWARD PORTE, of Richmond Place, Dublin, and EDWARD
MANVILLE, of Richmond Hill, in the County of Dublin, Ireland, Electrical
Engineers, do hereby declare the nature of our said invention for IMPROVE-
MENTS IN APPARATUS FOR CONTROLLING ELECTRICALLY THE MOTION OF STEAM
OR OTHER ENGINES," to be as follows:-
Tho object of our said Invention is to produce an apparatus or governor, for
controlling by electrical means the motion of steam or other engines or motors.
For this purpose we mount on the engine a contrivance, which wo call an
Electric Governor, constructed and operating in the following manner :-
Upon a suitable carriage are arranged two pairs of electro-magnets, each pair being
provided with a pawl which engages in the periphery of a wheel mounted between
the electro-magnets. This wheel acts on a screw in connexion with the governing
valve of the engineo, in such a manner that the valve shall be opened or closed by
the motion of said wheel.
The carriage with the electro-magnets and attachments is kept oscillating about
the wheel by an eccentric on the engine shaft, or other suitable means; and as the
free ends of the magnet pawls are arranged to exercise a thrust on the wheel in
opposito directions, it will be obvious that when either pawl engages the said wheel,
it will rotate in the same direction as the pawl which engages it, and then acting
on the screw connecting it with the governing valve, will open or close same,
admitting a greater or less supply of the motor element to the engine.
Tho electric governor thus described may be operated by the following means:-
A tachometer or other speed indicator is fitted with two or more segmental contact
plates extending a certain distance round the dial and separated from each other
by a small space, representing one or two revolutions of the machinery to which the
apparatus is to be applied. The indox hand of the tachometer is then provided with
a contact brush which plays on the segmental plates when the index hand passing
them. These contact plates in conjunction with a suitable battery are so connected
up with the clectric governor hereinbefore described, that when the index hand is
in connexion with the contact plato representing a speed below that desired, the
current actuates the electro magnet of the governor whose pawl engages the wheel
in the necessary direction, to opon the governing valve, the reverse taking place
when the index hand comes into contact with the plate reprosenting a speed higher
than that desired.
mith... 1001

page_text: COMPLETE SPECIFICATION.
Wo ARTHUR EDWARD PORTE, Richmond Place Dublin, and EDWARD MANVILLE,
Richmond Hill, Dublin, do hereby declare the nature of our invention for " IMPROVE-
MENTS IN APPARATUS FOR CONTROLLING ELECTRICALLY THE MOTION OF STEAM OR
OTHER ENGINES" and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:—
The object of our said invention is to produce an apparatus or governor for
-controlling by electrical means the motion of steam or other engines or motors.
For this purpose wo mount on the engine or other motor a contrivance which we
call an electric governor constructed and operating in the following manner :
Upon a suitable carriage are arranged two pairs of electro magnets each pair
being provided with a pawl which engages in the periphery of a wheel mounted
midway between the electro magnets. This wheel acts on a screw in connexion
with the governing gear of the engine in such a manner that the passage shall be
opened or closed by the rotatory motion of the said wheel acting cither direct or
through the expansion gear.
The carriage with the electro magnets and attachments is kept oscillating about
the wheel by an eccentric on the engine shaft or other suitable means and as the
free ends of the magnet pawls are arranged to exercise a thrust on the wheel in
opposite directions it will be obvious that when either pawl engages the said wheel
it will rotate in the same direction as the pawl which engages it and then acting
on the screw connecting it with the governing valve will open or close same
admitting a greater or less supply of the motor clement to the cylinder of the
engine.
The electric governor thus described may be operated by the following means :—
a tachometer or other speed indicator is fitted with two or more segmental contact
plates extending a certain distance round the dial and separated from each other by
a small space representing one or two revolutions of the machinery to which the
apparatus is to be applied. The index-hand of the tachometer is then provided
with a contact brush which plays on the segmental plates when the index hand is
passing them. These contact plates in conjunction with a suitable battery or other
source of current are so connected up with the electric governor that when the
index-hand is in connection with the contact plate representing a speed below that
desired, the current actuates the electro magnet of the governor whose pawl
engages the wheel in the necessary direction to open the governing valve: the
reverse taking place when the index-hand comes into contact with a speed above
that desired. The operation is however not necessarily confined to a tachometer
but may be controlled by other means so long as the governor is operated in the
manner described from or by the machinery to which it is applied.
In order that our said invention may be more readily understood and carried into
practice we will describe the accompanying drawings:
Figure 1. is an elevation (full size): Figure 2. a side view showing the
arrangement of the several parts which constitute our improved electric governor as

page_text: herein before described, and Figure 3 an ordinary tachometer or speed indicator
showing the segmental plates above referred to on its face.
Similar letters indicate corresponding parts in each of the views.-A A is the
carriage, which oscillates on the shaft b supported in the standard O and upon
which are mounted the two pairs of electro magnets d and d¹. These electro
inagnets control the pawls ee which are pivotted to the carriage at e', e' so that
when either pawl is attracted by its respective pair of magnets, its free end engages
the periphery of the wheel E exercising thereon a thrust or push, as the carriage
oscillates, and causing it to move in a corresponding direction to the thrust or push
of the pawl which engages it. This wheel gears with the bevelled wheel which
in turn acts on the worm or screw g fixed on the vertical shaft h which latter is
connected with the governing valve of the engine.
It will be obvious that as the.wheel E moves to the right or left the shaft h will,
through the intervention of the said bevel wheel and worm rise or fall, as the case
may be, thus opening or closing the valve by which the supply of steam or other
motor element is regulated. The play of the pawls can be adjusted by the set screw i
and spring k.
It is clear also that the above governor can be applied to regulating electro
motors by the insertion of resistance into the field magnets instead of.regulating
the admission of steam when the engine driving the motor is unsteady.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declaro that what
we claim is
First-In an apparatus such as described the use of two electro magnets the
current being passed through one or other of them as the electro motive force or
speed rises or falls, controlling the device for the regulation of the admission of
steam or other motive element or for the insertion of resistance substantially as
specified.
Second-The method of controlling the motion of steam or other motors or
generators by electrical means, substantially as hereinbefore specified and sot forth.
Dated this 95th day of February 1885