IMPROVED ARRANGEMENT OF APPLIANCES FOR ELECTRICALLY CONTROLLING AND REGULATING THE SPEED OF ENGINES EMPLOYED FOR DRIVING DYNAMO ELECTRIC MACHINES.
Year: 1882

page_text: LETTERS PATENT to John Richardson, of the firm of Robey and Co., of
Lincoln, in the County of Lincoln, Engineers, for an Invention of IMPROVED
ARRANGEMENT 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 27th February 1882.
JOHN RICHARDSON of the firm of Robey and Co. 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 certain improvements connected with the Invention
patented by myself on the 22nd day of January in the year 1881 No. 288 for
apparatus for controlling and regulating the speed of engines employed in driving
Dynamo Machines.
On Sheet 3 of the drawings of the specification of the above patent I show a
method of governing by means of a solenoid within which a great part or the
whole of the electric current circulates. According to my present invention I
connect this solenoid with the valve by fixing the levers under instead of above
the valve to draw the valve downwards instead of forcing it down and thus get
the stalk of the valve in tension instead of compression. By this means its diameter
and therefore its friction in the stuffing boxes is very much reduced. This thin
stalk I make of steel or of phosphor bronze and carry it upwards through the
stuffing box connecting its upper end by means of a flexible cord or steel band
either to the arm of a lever upon the long arm of which I hang a weight or pass
it round a pulley on the opposite side of which I hang a weight or connect it

page_text: directly to a strong spiral or other spring, the object being to lift the valve upwards
to open it in opposition to the force of the solenoid tending to close it.
I also use simpler means to prevent the engine chasing thus dispensing with the
second electro magnet now used for that purpose, utilizing instead, the weight of
the core of the solenoid to which core I attach a brass rod and balance weight
This Invention can be adopted to governing an ordinary throttle valve by
letting the solenoid pull at the end of a lever upon the spindle of which is a wing
or other throttle valve.
The shifting mechanism of automatic expansion gear can also be actuated by
means of a solenoid or motor

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 26th August
1882.
JOHN RICHARDSON of the firm of Robey & Co 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 certain improvements connected with the Invention
patented by myself on the 22nd day of January in the year 1881 No. 288 for
Apparatus for controlling and regulating the speed of Engines employed in driving
Dynamo Machines. On sheet 3 of the drawings of the specification of the above
patent I shew a method of governing by means of a solenoid within which a great
part or the whole of the electric current circulates.
Now according to my present Invention which I illustrate on the annexed
drawings. Figures 1, 2 a front and end elevation respectively. I connect this
solenoid with the valve B by fixing the lever H under instead of above the valve
to draw the valve downwards instead of forcing it down and thus get the stalk G
of the valve in tonsion instead of compression; by this means its diameter and
therefor its friction in the stuffing boxes is very much reduced. This thin stalk G
I make of steel or of phosphor bronze and I carry it upwards through the stuffing
box A connecting its upper end by means of a flexible cord or a steel band C,
either to the arm E of a lever (upon the long arm I of which I hang a weight J
or pass it round a pulley on the opposite side of which I hang a weight) or connect
it directly to a strong spiral or other spring, the object being to lift the valve
upwards to open it in opposition to the force of the Solenoid tending to close it.
I also use simple means to prevent the Engine chasing thus dispensing with the
second electro magnet now used for that purpose, utilizing instead the weight of
the core of the Solenoid to which core I attach a brass rod and balance weight as
at Figure 3.
This Invention can be adapted to governing an ordinary throttle valve as at
Figure 4 by letting the solenoid F pull at the end of a lever K, upon the spindle
of which is a wing or other throttle valve L. Figures 5 and 6 Sheet 2 shew
another and more preferable method of applying my invention to shutting off the
steam from the engine if from any cause the current of electricity ceases and acts
as follows. C is a solenoid which when charged with the current draws up the
core D and with it the long arm of lever E the short arm of which presses upon
the rod F and through it on the equilibrium valve G thus regulating the admission
of steam by the valve-when the current censes the core falls and the short arm of
lever E presses upwards against the lever A and the rod connected to the other
end of same forces down the lever B which being connected to spindle G closes
the valve and prevents the engine chasing or running away as it would
otherwise do.
Another improvement is in the solenoid itself which has the wire so wound
upon it that by moving the lever H over the contact pieces I III the solenoid can
be varied in intensity, each additional contact piece bringing into play or shutting
out the additional coil of wire thus permitting the speed of the engine to be
varied at will according to the work it is set to do.
Figures 7 and 8 shew another arrangement which I propose to use with currents
of lower intensity; In this case I use 2 solenoids with their respective coils A
and B side by side through which I can cause a current to pass either in series or

page_text: parallel currents according to circumstances and the intensity of which can be
varied by moving the levers over the contact pieces as previously described. By
using a pair of solenoids I obtain a much greater intensity of magnetic power when
using currents of low intensity and therefor more delicate governing. A section
in Figure 7 shows also another arrangement of shutting off the steam when the
current ceases. In this case two levers are used C and D. When the core of the
solenoid falls the lever C falls down with it and the lower end of rod E presses
upon the outer end of lever D, forcing down the spindle of valve and shutting off
steam,
The lower end of spindle E fits loosely into a hole in the end of lever D and is
free to rise within it thus regulating the valve and it is only when the current
stops entirely that the collar upon the spindle E comes into contact with lever D
and thus actuates it; Another feature in Figure 7 is a double diaphragm F¹, This
is inserted between the two parts of the valve spindle and is from its form elastic;
It is made of such size and strength as to vary in width according to the pressure
of steam in the boiler, and receives its steam through the curved pipe G from some
point nearer the boiler than the stop valve. Could a uniform pressure of steam be
depended upon such an arrangement would be unnecessary in this class of governor
but as it is well known that boiler pressures do vary considerably this expedient
is used to counteract the same which it does by the diaphragm F1 expanding and
thus partly closing the valve as the pressure rises and contracting and thus
admitting more steam to the engine as the pressure falls. Figure 9 shows an
arrangement for working the automatic expansion gear clectrically. In this case
one end of the valve rod A is attached to the core of a solenoid B and raises or
lowers the rod A according to the intensity of the current this end working in a
slot in the eccentric C varies the point of the cut off of the steam in a well known
manner. It is obvious that such an electrical arrangement can be applied to
various kinds of cut off gear whether actuating a slide, equilibrium, or other class
of valves.
Having now described the nature of my said Invention and in what manner the
same is to be performed I declare that what I claim as novel in this Invention is.―
First. The improved arrangement of appliances for electrically controlling and
regulating the speed of engines employed for driving Dynamo Electric Machines.
Secondly-The improved automatic stopping arrangement shewn in the
accompanying drawings and as described.
Thirdly The method of varying the intensity of the solenoids as applied to
steam engine governors and the method of compensating for the varying pressures
of steam whether applied to electric or other governors, and
Fourthly The application of the solenoid for regulating the point of cut off in
steam engines subsequently as described.
In witness whereof I the said John Richardson have hereunto set my hand
and seal this twenty fourth day August in the year of our Lord One
thousand eight hundred and eighty two.
JOHN RICHARDSON. (L.S.)