Improvements in Governors for Regulating the Speed of Machinery.
Year: 1895

page_text: Date of Application, 26th Aug., 1895
Complete Specification Left, 22nd May, 1896-Accepted, 4th July, 1896
PROVISIONAL SPECIFICATION.
Improvements in Governors for Regulating the Speed of Machinery.
I, EDWARD THUNDERBOLT of Drummond Street, Carlton, in the Colony of
Victoria, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention has been devised to provide improvements in connection with that
class of machinery known as governors, that is to say mechanism for regulating
the supply of the motive fluid or gas to engines and the like or for operating any
approved mechanism for controlling or regulating the speed of machinery and
may be described as follows-
I employ one or more magnetic coils capable of controlling any desired voltage in
electricity attached and subject to the general circuit of an electric installation. I
arrange such electro-magnetic coil or coils to operate on the speed regulating gear
of machinery in the most approved manner under the varying circumstances on the
different kinds of engines such as electric lighting engines where the speed is so
required to be regulated as to increase when the increased number of lights are
switched on, and vice versa to decrease with the reduced switching when lights
are being turned off.
The magnetic coil is so arranged as to magnetically attract or operate a bar rod
plate or lever which is directly or indirectly in engagement with either the motive
power supply or an intermediate mechanism employed for the purpose of controlling
the said motive power supply such for instance as a throttle valve of a steam engine
or gas or oil supply to a gas engine or the like.
In some cases the magnetic coil may operate as aforesaid directly or indirectly
upon break gear for reducing the speed of an engine or other machinery.
In order to overcome the vibratory or oscillatory motion of the bar rod plate or
lever owing to the pulsation of the electric current I employ a piston and rod
working in oil, or other liquid in a cylinder, said piston being perforated and its
rise or fall being only permissible by the gradual upward or downward escape of the
oil through the perforations, and thus giving steadiness to the said bar rod plate or
lever, (to which the piston rod is linked) in its prescribed travel.
Dated this 26th day of August 1895.
COMPLETE SPECIFICATION.
Improvements in Governors for Regulating the Speed of Machinery.
I, EDWARD THUNDERBOLT of Drummond Street, Carlton, in the Colony of
Victoria, Engineer, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:-
This invention has been devised to provide improvements in connection with that
class of machinery known as governors, that is to say mechanism for regulating

page_text: the supply of the motive fluid, gas, or electric current to engines and the like or
for operating any approved mechanism for controlling or regulating the speed of
machinery and may be described as follows-
I employ one or more magnetic coils capable of controlling any desired voltage
in electricity attached and subject to the general circuit of an electric installation.
I arrange such electro-magnetic coil or coils to operate on the speed regulating
gear of machinery in the most approved manner under the varying circumstances
on the different kinds of engines such as electric lighting engines where the speed
is so required to be regulated as to increase when the increased number of lights
are switched on, and vice versa to decrease with the reduced switching when lights
are being turned off.
The magnetic coil is so arranged as to magnetically attract or operate a bar,
rod, plate or lever which is directly or indirectly in engagement with either the
motive power supply or an intermediate mechanism employed for the purpose of
controlling the said motive power supply such for instance as switches of an electric
motor or a throttle valve of a steam engine or gas or oil supply to a gas engine
or the like.
In some cases the magnetic coil may operate as aforesaid directly or indirectly
upon break gear for reducing the speed of an engine or other machinery.
In the accompanying drawings I have illustrated my invention as arranged to
control the motive fluid of a steam engine to work an electric light supply and in
which―
Figure 1 shews a general view of the apparatus in elevation-a part being shown
in section.
Figures 2, 3 and 4 shew side views of parts of the apparatus.
C²."
In these drawings "A" represents a lever which has a fulcrum standard "A"
arranged to slide, at its lower end, on a fixed beam "B," and at its upper end
along the lever "A," the said lever turns upon the pins "A³." The sliding
standard "A" is secured in the desired position on the lever by means of the
thumb screws "A" "B" The lever "A" has adjustably connected thereto a
rod "C" which is linked to a vertical piston rod "C" carrying a piston
The rod "C" has threaded sides and passes through a slotted portion of the
lever "A" in which a milled screw "C3" is set to adjust said rod. The piston "C"
is arranged to work within a cylinder "D." This cylinder "D" has a number
of shaped openings "D1" which form a communication between such cylinder
and an outer casing D2." The aforesaid piston is arranged to control in its
movement the amount of opening from the outer casing "D" to the cylinder and
so regulate the inlet of fluid to such cylinder. A pipe is connected to the said
casing at "E" by which the steam from the boilers is conducted to the casing of
cylinder "D" whilst the cylinder has an outlet pipe "F" to conduct such fluid
to the engine. The lever "A" has at its side opposite to that at which the fulcrum
is placed a magnet core "G" such core being connected to the lever by linked screw
rods "G, G2 in the adjustable part "G" by which the height of such core may
be regulated. The core "G" is arranged to depend partially in to a coil "H"
which coil is secured upon a base plate "I." Terminals " H', H" are attached to
the base plate to which the circuit wires are connected. The coil "H" is provided
with a magnetic plug "H3" for assisting to attract the core "G" and which bas
its distance from the core "G" adjustably arranged by the thumb screw
"H"
and screw pin "H" set in the frame "H."
A frame "J" (see Fig. 3) is attached to the fixed beam "B" and has a slot "J"
in which the lever "
"
A moves vertically, milled screws J2 J3" being provided
to limit the travel of the said lever.
The lever "A" has a safety appliance connected therewith (see Figs. 1 and 2)
which will automatically act to cause the piston "(" to close the ports
"D1"
and so stop the flow of motive fluid an instantly cause the engine or motor to
cease running. The attachment consists of a spring "K" which is secured to
the lever "A" at one end, and to a slotted frame "K" at the other end.
"

page_text: 66
A pin "L" is arranged to project into this slotted frame and to form a hold
on the spring "K" and lever attached when in its normal working. This pin "L"
has an arm 66
L" by which it is pivotted at "L" to a plate "M," the plate "M"
with the attachment "L" being adjustably raised or lowered by the pin "M" and
thumb screws "M" on the fixed bracket "O." A vertical rod "N is adjustably
secured to the lever "A" and is arranged to engage with the projecting end of the
pin "L," its distance from such end being adjustable by the milled nut N¹."
The modus operandi of the invention may be described as follows-
Assume the appliance to be connected up with the inlet pipe "E" connected to
the source of fluid supply and the pipe "F" controlling the dynamos. If the
apparatus be at work and an additional number of lights be switched on to the
circuit it will immediately cause a decreased current to pass through the coil "H"
and consequently a less attractive force will be exerted on the core "G" thus
allowing the spring "K" to act to raise such core partially out of the coil which
action will raise one end of the lever "A" and with it the piston rod "C" and
piston attached thus opening the V shaped ports "D" in the cylinder "D" and
allowing an inrush of steam or other motive fluid into the cylinder and through
the pipe "F" to the engine. The speed of the engine will thereby be increased
so communicating to the dynamo an increased speed and consequent increase of
electrical supply to maintain a greater number of lights on the circuit.
In shutting off a number of lights a reverse action will take place, that is the
core "G" will be drawn down and with it the lever "A" so lowering the piston" (12"
and proportionately closing the ports "D!."
If the current be suddenly cut off from the circuit the safety appliance will
come into operation so as to prevent the racing away of the engine.
The pull
of the core "G" will then be relaxed and the spring "K" will cause samne to jump
up and with it the rod "N" secured to the lever "A" so causing said rod "N
to strike the pin "L" and cause it to turn on its centre "L" thus releasing its
opposite end from engagement with the slotted frame "K" which now released
drops and with it the end of lever "A" so causing the piston "C, C₁" connected
to the lever to close the ports "D" and thus stop the further supply of fluid to
the engine.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what 1
claim is-
1. In governors for regulating the speed of machinery-
The combination of an electro-magnet as G, H" adjustably secured to a lever
as "A" having a sliding fulcrum standard as "A¹" in combination with a piston
rod as "C, C and C2" adjustably secured to such lever and carrying a piston
as C2" which operates to open and close ports as "D" in a cylinder as "D"
such cylinder having an outer casing as "D" with inlet and outlet pipes as "E"
and "F"substantially as and for the purposes set forth.
tr
2. In governors for regulating the speed of machinery-
The combination of a lever as "A" having a spring as "K" attached thereto at
one end and at the other to a slotted frame as "K¹" in combination with a pin
as "L, L" centred upon an adjustable plate as "M" and a vertical rod as "N"
adjustably connected with the lever "A" substantially as and for the purposes set
forth.
3. The general arrangement and combination of the whole of the parts sub-
stantially as herein described and as illustrated on the accompanying drawings.
Dated this 22nd day of May 1896
A. M. & WM. CLARK,
53 Chancery Lane, London, Chartered Patent Agents.