Improvements in Appliances for Electrically Controlling and Regulating the Speed of Motors Employed for Driving Dynamo Electric Machines.RICALLY CONTROLLING AND REGULATING THE SPEED OF MOTORS EMPLOYED FOR DRIVING DYNAMO ELECTRIC MACHINES
Year: 1884

page_text: Improvements in Appliances for Electrically Controlling and
Regulating the Speed of Motors Employed for Driving
Dynamo Electric Machines.
PROVISIONAL SPECIFICATION.
We, CHARLES JOHN BOSANQUET of Old Bolingbroke Rectory, Spilsby in the
County of Lincoln, Fitter and WILLIAM AUGUSTUS TOMLINSON of Birthorpe,
Folkingham in the County of Lincoln, Draughtsman do hereby declare the naturo
of our said Invention for "IMPROVEMENTS IN APPLIANCES FOR ELECTRICALLY
CONTROLLING AND REGULATING THE SPEED OF MOTORS EMPLOYED FOR DRIVING
DYNAMO ELECTRIC MACHINES" to be as follows:-
'
This Invention relates to a method of regulating a motor electrically by means
of gearing rotated by the main shaft of the motor, and brought into action by the
aid of solenoids or electro-magnets and solenoids, this gearing to increase and
decrease the rate of expansion or open and close the valve used to control the speed
of the motor.
The apparatus is, according to this Invention, so arranged that when the current
of the Dynamo is at its normal electro motive force the gearing will be out of
action but immediately the electro motive force rises above the normal the gearing
is brought into action by the solenoids or by the electro magnets and solenoids and
reduces the speed of the motor. The reverse of this takes place when the electro
motive force falls below the normal.
This Regulator is also intended for are and incandescent lighting, irrespective of
the number of lights in circuit, and its action will be governed by the quantity of
current transmitted.
The action of our apparatus is as follows:-One or more solenoids are placed in
circuit the cores of which tend constantly to pull against an adjustable spring or
weight.
The cores are attached to a lever acting directly upon the gearing or playing
between two contact pieces but touching neither in the normal position. When the
solenoid overcomes the spring the lever comes to rest upon one of the contact pieces
and completes the circuit of an electro magnet whose armature brings the gearing
into action to close the valve until the normal position is again reached when
contact would be broken and the gearing cease to act.

page_text: When the spring overcomes the solenoid the lever comes to rest upon the other
contact piece completing the circuit of a second electro magnet and attracting said
armature but bringing the gearing into action to open valve until the normal
position has again been reached when as before contact would be broken and the
gearing cease to act.
Provision is made for bringing the motor automatically to rest should the main
circuit be accidentally or otherwise broken.
This system of regulation is equally applicable to any motor whether actuated
by steam, gas or water and it is not confined to the regulation of one motor or
dynamo but with suitable connections it will control several.

page_text: Improvements in Appliances for Electrically Controlling and
Regulating the Speed of Motors Employed for Driving
Dynamo-electric Machines.
We, CHARLES JOHN BOSANQUET, of Old Bolingbroke Rectory Spilsby, in the
county of Lincoln, Fitter, and WILLIAM AUGUSTUS TOMLINSON, of Birthorpe,
Folkingham, in the County of Lincoln, Draughtsman, do hereby declare the nature
of our said Invention for "IMPROVEMENTS IN APPLIANCES FOR ELECTRICALLY
CONTROLLING AND REGULATING THE SPEED OF MOTORS EMPLOYED FOR DRIVING
DYNAMO-ELECTRIC MACHINES," and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement,
reference being had to the accompanying drawings, and to the letters of reference
marked thereon, that is to say :—
This our Invention relates to a method of electrically regulating a motor used
for driving Dynamo-electric machines, so as in the case of electric-lighting to
ensure as far as possible the maintainance of a constant current in the lamps,
independent of the number of lamps burning, of one or more lamps being stopped
or renewed, or any other outside cause; by means of gearing rotated by the main
shaft of the motor, and brought into action by the aid of solenoids, or electro
magnets and solenoids. The said gearing, in accordance with this our Invention,
increases and decreases (as required) the rate of expansion; or opens and closes
(as required) the valve used to control the speed of the motor.
According to this invention we construct the apparatus so that, when the current
of the dynamo is at its normal electro motive force, the gearing is out of action;
but immediately the electro motive force rises above the normal, the gearing is
brought into action by the solenoids, or by the solenoids and electro magnets, and
the speed of the motor is thereby reduced. The reverse of this takes place upon
the electro motive force falling below the normal. Provision is also made, in this
invention, for bringing the motor automatically to rest should the main circuit be,
accidentally, or otherwise, broken.
This our invention is equally applicable to any motor whether actuated by
steam, gas, air, or other motive power, and is not limited to the regulation of one
motor or dynamo, but may with suitable connections control several.
And in order that this our invention may be fully understood reference is had to
the accompanying drawings:-Figure 1 illustrates our "Regulator" caused to act
by a solenoid and 2 magnets. A solenoid A is here used to pass the current to one
or other of the magnets B & C, which bring gearing into action.
When variations occur in the strength of current through lights being turned on
or off, or any other cause, the solenoid brings governor into action, to effect the
required adjustment of throttle valve, or other equivalent part of motor. If
strength of current exceeds the normal, the current passes through magnet C which,
by gearing partly closes the valve; and when the current falls below the normal
magnet B opens the valve.
The Governor is driven from horizontal shaft D, E being the driving pulley.
The shaft D carries a sleeve with a gear wheel at each end F & G. This sleeve

page_text: rotates with shaft D, but is capable of motion along same, enabling one or
other of the wheels F & G to gear with a third wheel H (preferably friction
gearing or toothed gearing with friction clutches, but a suitable equivalent may be
used) which wheel H has its spindle in connection with the throttle valve. This
connection may be made in any suitable manner, but preferably by bell crank
lever h, actuated by screwed spindle of wheel H. A shunt from main circuit of
dynamo circulates in the solenoid A, and the pull on the core I in normal position
is balanced by a spring or weight S, and any variation in strength of current causes
the core I to rise or fall, and bring the lever K in contact with one of the
contacts L or M, closing a before open shunt circuit through one or other of the
electro-magnets B or C, as the case may be. Upon the strength of current falling
below normal the lever K makes contact with the wires NO exciting magnet B,
which attracts the lever P and brings wheel F in gear with wheel H, and opens
valve,
Upon the strength of current rising above normal, the core I rises, and with it
the lever K, and makes contact between the wires N R, exciting magnet C, which
attracts lever P and brings wheel G in gear with wheel H, and closes valve.
In cases where this arrangement of governor is inclined to hurt the fulcrum of
lever K is on the valve spindle, or so connected that it has a similar motion to that
of the valve spindle communicated to it so that the valve in changing its position
breaks contract between lever K and either of the contracts L or M, as the case
may be, releasing gearing before the valve has travelled too far. A magnet T and
weighted lever are added for the purpose of closing the valve in the event of the
current breaking. The magnet T is excited by a small portion of current from
dynamo, and while current lasts holds the weighted lever V; but immediately the
current breaks, the lever V falls, forcing shaft W and lever P to the left, which
brings wheels G H into gear, and closes valve. Z is a spring to keep shaft W in
position, and is compressed when lever V falls.
Having now particularly described & ascertained the nature of this our said.
Invention and in what manner the same is to be performed we declare that what
we claim is
1st The method of electrically controlling and regulating the speed of motors
employed for driving dynamo electric machines, by means of gearing rotated by
the main shaft of the motor, and brought into action by the aid of solenoids, or
of electro magnets and solenoids, substantially as hereinbefore set forth and
described.
2nd The method hereinbefore set forth of instantly cutting off the admission of
steam, gas, air or other motive power to the engine, in case of any accidental
stoppage of the current.
3rd The general arrangement and construction of appliances for electrically
controlling and regulating the speed of motors employed for driving dynamo
electric machines, substantially as hereinbefore set forth and described.
Dated this 10th day of December 1884.