IMPROVED ARRANGE- MENT OF APPLIANCES FOR ELECTRICALLY CONTROLLING AND REGULATING THE SPEED OF ENGINES EMPLOYED FOR DRIVING DYNAMO ELECTRIC MACHINES
Year: 1883

page_text: LETTERS PATENT to John Richardson of the firm Robey and Co of Lincoln
in the County of Lincoln Engineers for an Invention of IMPROVED ARRANGE-
MENT OF APPLIANCES FOR ELECTRICALLY CONTROLLING AND REGULATING THE
SPEED OF ENGINES EMPLOYED FOR DRIVING DYNAMO ELECTRIC MACHINES
PROVISIONAL SPECIFICATION left by the said John Richardson at the
Office of the Commissioners of Patents on the 11th January 1883.
JOHN RICHARDSON of the firm Robey and C° of Lincoln in the County of
Lincoln Engineers "IMPROVED ARRANGEMENT OF APPLIANCES FOR ELECTRICALLY
CONTROLLING AND REGULATING THE SPEED OF ENGINES EMPLOYED FOR DRIVING
DYNAMO ELECTRIC MACHINES
"
This Invention relates to a method of regulating the speed of an engine
electrically in conjunction with an ordinary speed governor which may be of any
of the well known types but instead of the governor acting direct upon the throttlo
valve or expansion link this mechanism is actuated by an electro motor or motors
which open or close the throttle valve and increases or decreases the rate if
expansion by any of the well known appliances.
The apparatus would be so arranged that when the engine was running its
normal speed it would be at rest but immediately the governor slide was raised
contact would be made between the two ends of a wire through which the electric
carront circulated and an electric motor in the circuit would instantly start
revolving and actuate the mechanism which would reduce the admission of steam,
which reduction would go on until the engine resumed its normal speed when the
electric contact would be broken and the electric inotor would stop.
The contrary of this would of course take place when through increase of load
the governor fell and by this means a practically constant speed would be
maintained under great varieties of load.
"

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Richardson in the Great Seal Patent Office on the
10th July 1883.
JOHN RICHARDSON of the firm Robey and C° of Lincoln in the county of
Lincoln Engineers IMPROVED ARRANGEMENT OF APPLIANCES FOR ELECTRICALLY
CONTROLLING AND REGULATING THE SPEED OF ENGINES EMPLOYED FOR DRIVING
DYNAMO ELECTRIC MACHINES
This invention relates to a method of regulating the speed of an engine
electrically in conjunction with an ordinary speed governor which may be of any
of the well known types but instead of the governor acting direct upon the
throttle valve or expansion link the mechanism is actuated by an electric motor
or motors which open or close the throttle valve and increase or decrease the
rate of expansion by any of the well known appliances.
The apparatus would be so arranged that when the engine was running its
normal speed it would be at rest but immediately the governor slide was raised,
contact would be made between the two ends of a wire through which the
electric current circulates and an electric motor in the circuit would instantly
start revolving and actuate the mechanism which would reduce the admission of
steam which reduction would go on until the engine resumed its normal speed
when the electric contact would be broken and the motor would stop.
The contrary of this would of course take place when through increase of load
the governor fell and by this means a practically constant speed would be
maintained under great variety of load.
The arrangement which I prefer is shown in the annexed drawings in which
A A is an ordinary governor which may be of any of the well known types
occupying a constant position at a constant speed. B is a lever either forming
part of the governor fork or so connected with it that it moves simultaneously
with it. E is an electric motor so geared with the worm wheel H and the screw I
that when the armature revolves in one direction the connecting link F is raised in
the slot link G and the slide valve of engine caused to cut off the steam at an
earlier part of the stroke and when the armature revolves in the contrary direction
the connecting link F will be lowered and a greater admission of steam will take
place. Two motors may be used if preferred to work in opposite directions or one
may have its magnets and armature so wound that it can revolve in opposite
directions according to the manner in which the current is sent through it.
The action of the governor is as follows:-As soon as there is the slightest
increase of speed the lever B would make contact with the contact piece С thus
closing what was before an open circuit the armature would revolve and by raising
the connecting link F would cut off the steam until the engine has resumed its
norinal speed when the governor falling, contact would be broken and the link
would remain in the new position it had been compelled to take the engine with its
lighter load continuing to work at its normal speed A reverse action would
take place were the load increased the governor falling would make contact
between B and D the armature would revolve in the opposite direction and the
connecting link would fall till enough steam had been admitted to again raise the
governor and break the contact. It will thus be seen that whatever may be
the variations in the load of the engine there is only one speed at which it is
compelled always to run.
When the engine is used for electric lighting the electric motor may be actuated
by the current working the lamps but when there is no such current a galvanic
battery, electric accumulator or other source of electricity may be used which gives
a fairly constant current,

page_text: It may sometimes be found advisable to bring a solenoid into action to work a
throttle valve as shown in my previous patents N° 288 in the year 1881 and
No 941 in the year 1882 and this can be done either by itself or in connection with
the expansion gear.
It is evident also that the above method of using electricity to obtain uniform
speed in an engine does not depend upon the precise form of expansion gear shown
but can be applied to any of the well known forms.
Having now described the nature of my said invention and in what manner the
same is to be performed I declare that I claim.
.
The manner of combining a speed governor with an electric motor or solenoid
substantially as shown as to bring the electric current into action to vary the rate
of admission of steam, the speed of the engine and governor varying within
so narrow limits as to be practically constant as hereinbefore described and
substantially as shown in the annexed drawings.
In witness whereof I tho said John Richardson have hereunto set my hand
and seal this seventh day of July in the year of our Lord One thousand
eight hundred and eighty three