IMPROVEMENTS IN THE REGU- LATION OF ELECTRICAL CIRCUITS, AND IN APPARATUS RELATING THERETO
Year: 1885

page_text: "
1, DAVID LIONEL SALOMONS, of Broomhill, in the County of Kent, Baronet, do
hereby declare the nature of my invention for IMPROVEMENTS IN THE REGU-
LATION OF ELECTRICAL CIRCUITS, AND IN APPARATUS RELATING THERETO, to be
as follows:-
My invention relates to the regulation of electrical currents, by which tram-cars
or other moving traction engines or rotary or other motors are driven, or upon, or
in connection with which, electrical lamps are situate, and is designed to render
constant, or to regulate within small limits or known limits, the electro-motive
force of the said currents, so as to prevent injurious action upon the current
generators, from the sudden cutting out of one or more of the said tram-cars, or
other motors, or other machinery or lamps.
My device by which I produce this desired effect, is similar to that described in
my application for Letters Patent dated 27th January 1885 and numbered 1184,
consisting of either a regulator-motor, running at constant speed in a "parallel arc,"
or a regulator-dynamo "in parallel" running at constant speed, both developing
electro-motive force counter to that of the main circuit, and thus affording
automatic regulation of the electro-motive force in the said circuit, as more fully
described in the aforesaid application.
"
I may, however, in the combination hereinbefore defined, use more than one
regulator motor or regulator dynamo, in "series" relatively to one another, and in
parallel arc with regard to the main circuit, and may use several such series
regulator-motors or dynamos, placed "in parallel" at different points on the main
circuit.
"
in series on
I may also drive such regulator-motors or dynamos which are
their respective "parallel" or "parallels" at different speeds, which renders the
automatic regulation more nicely balanced to suit extremely variable conditions in
the main circuit, and also permits the automatic regulation to be within any
desired limits of variation, in the electro-motive force in the main circuit, which in
some cases is of great value.

page_text: The action of two motors "in series," placed "in parallel," depends on their
characters; that is, each motor or dynamo-regulator has its own "curve," and
therefore two "in series" will have a resultant "curve," which may have a
character not easy to obtain by one machine. Thus although the motors or
dynamos, placed "in parallel," are supposed to run at different speeds, it is also
seen that this is not essential, provided the "curves" of the two machines are not
similar.
Where such motor-regulators are used for electric-trams or railways, absolutely
constant speed is not necessary, but very heavy fly wheel power must be given,
that the motor may have great momentum.

page_text: Apparatus relating thereto.
I, DAVID LIONEL SALOMONS, of Broomhill in the County of Kent, Baronet, 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
My invention relates to the regulation of electrical currents by which tram-cars
or other moving traction engines or rotary or other motors are driven, or upon or
in connection with which electrical lamps are situate; and is designed to render
constant, or to regulate within small or known limits, the electro motive force of
the said currents, so as to prevent injurious action upon the current generators
from the sudden cutting out of one or more of the said tram cars or other motors,
or machinery, or lamps.
My device, by which I produce this desired effect is somewhat similar to that
described in my Patent Specification of the 27th January 1885, and numbered 1184,
which is therein described as consisting of either a regulator motor, running at
constant speed in "parallel" between the forward and return mains, or of a
regulator dynamo, in the same position, driven at constant speed to develope
electro motive force, counter to that of the main circuit, and thus affording
automatic regulation of the electro motive force in the said circuit as is fully
described in the aforesaid Specification.
I may however in the combination hereinbefore defined, use more than one
regulator motor, or regulator dynamo, in series relatively to one another, and in
parallel with regard to the main circuit, and may use several such series regulator
motors or dynamos placed in parallel at different points on the main circuit.
In order that my invention may be the better understood I now proceed to
describe the same in relation to the drawings hereunto annexed, reference being
had to the letters and figures marked thereon.
Like letters refer to like parts in the drawings.
Figure 1 is a diagrammatic plan of the forward and return leads A. A of a main
circuit, from which tram-cars or other moving traction engines or rotary or other
motors may be driven, or upon, or in connection with which, electrical lamps are
situated. B is the generating dynamo or dynamos, driven by any suitable
mechanical means, represented by a stationary engine at C. At D D I show
regulator dynamos, placed in series relatively to one another, and in parallel at
suitable intervals between the aforesaid mains A A, and driven from any con-
venient source of mechanical power, such as the engines C C¹. The said dynamos
are set to rotate at constant speed by the fitting thereto of heavy fly-wheels, long
and light loose belts E E being used to permit of slip, should the speed of the
driving engines vary materially.
In figure 2 I show, diagrammatically, regulator motors F F placed in series
relatively to one another, and in parallel between the aforesaid mains A A of a
working circuit, generated as before by a dynamo or dynamos B, driven from any
suitable source of power, such as an engine C. The said regulator motors F F are

page_text: arranged to run at constant speed by the fitting thereto of heavy fly wheels or by
the fitting to their axes of a paddle or fan revolving in a fluid, or by a combination
of both devices.
I may drive these regulator motors or dynamos, which are in series on their
respective parallel or parallels, at different relative speeds. This arrangement
renders the automatic regulation more nicely balanced to suit extremely variable
conditions in the main circuit, and also permits the automatic regulation to be
within any desired limits of variation in the electro motive force in the main
circuit, which in some cases is of great value.
"
curve not
The action of two motors or dynamos, thus placed relatively in series, and in
parallel, between the circuites, depends on their respective characteristic curve, that
is; each motor-or dynamo-regulator has its own "curve" and therefore two in
series will have a resultant "curve," which may have a characteristic
easy to obtain by one machine. Thus, although the motors or dynamos placed in
parallel are supposed to run at different speeds it may be seen that this is not
essential, provided the "curves" of the two machines are not similar.
Where such motor regulators are used for electric trams or railways, absolutely
constant speed is not necessary, but very heavy fly wheel power niust be given, in
order that the motor may have great momentum.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
1st The regulation of the electro motive force of electrical currents, by the
employment of a counter electro motive force from two or more regulator motors,
or dynamos operated as motors, controlled as to their speed by a hydraulic fan or
fly wheel, and placed in series relatively to one another, but in parallel between
the two leads of a main circuit, at any desired number of points, to prevent
injurious action upon the current generators, from sudden variation in the work
required from the main circuit, substantially as and for the purposes described.
2nd The regulation of the electro motive force of electrical currents, by the
employment of a counter electro motive force, generated by two or more dynamos,
driven conveniently by long light loose belts and controlled for uniformity of
speed by heavy fly wheels, and placed in series relatively to one another but in
parallel between the two leads of a main circuit at any suitable number of points
to prevent injurious action upon the current generators from sudden variation in
the work required from the main circuit, substantially as and for the purposes
described.