Improvements relating to a System of Generation and Distribution of Electricity.
Year: 1887

page_text: Date of Application, 7th Apr., 1887
Complete Left, 6th Jan., 1888
Complete Accepted, 9th Mar., 1888
Improvements relating to a System of Generation and Distribution
of Electricity.
GEORGE ANNESLEY GRINDLE 79 Cambridge Gardens Notting Hill London, W.
Electrical Engineer do hereby declare the nature of this invention to be as
follows:-
My invention relates to a system of distribution of Electric energy for lighting
heating and power, and is adapted to either alternating or direct currents.
Two metallic conductors constitute the distributing mains, the current is supplied to
these at several points by means of Transformers or Secondary generators or dynamos
driven by Electromotors which are actuated by a high tension current conveyed to
them by a separate wire or wires, the said high tension current being supplied to the said
transformers, secondary generators, or motors either on the series or parallel systems
or a combination thereof.
It is obvious that these transformers, secondary generators, or dynamos driven
by Electro motors may be placed at as many points along the main conductors as may
be desirable, and may be of varying capacity of output, but of sensibly equal electro-
motive force, & that current may be drawn off from such conductors at any point or
points for lighting, heating, or motive power.
For the purpose of regulating the supply of current in the distributing conductors
and its potential independently driven dynamos (giving either alternating or direct
currents as required) may be coupled on to the said conductors at any point or
points.
It is also obvious that secondary batteries may be used in conjunction with
direct current transformers or dynamos driven by electro motors or other dynamos
for the purpose of regulating the potential or storing and supplying electric
energy.
By the above means a current of conveniently low and sensibly constant electro
motive force is supplied throughout the whole system from one or more generating
stations without the necessity for large and costly conductors.
1
1
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page_text: Improvements relating to a System of Generation and Distribution
of Electricity.
I, GEORGE ANNESLEY GRINDLE, of 79 Cambridge Gardens, Notting Hill, W.,
Middlesex, Electrical 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:-
.
My invention relates to a System of distribution of electrical energy for lighting,
heating, and power, and is adapted to either alternating or direct or continuous
currents.
Essentially my invention consists in the method of maintaining a current of
conveniently low and practically constant electromotive force by employing a number
of transformers, or secondary generators, or dynamos driven by electric motors, the
said transformers, secondary generators, or dynamos being connected in parallel
circuit as regards their secondary or distributing coils or wires, while separate wires
convey the inducing or driving current to the primary coils or electric motors.
Two continuous metallic conductors (which may of course be branched where
necessary) constitute the distributing mains, and the current supplied to these at
several points by the above means; it is obvious that the transforming apparatus may
be placed at as many different points as may be desired, and may be of varying capacity
of output but of sensibly equal electromotive force, and that current may be drawn off
from the distributing mains at any desired points.
The object of connecting the distributing coils or dynamos in parallel is that in an
installation comprising any considerable number of motors, lamps, or other energy-
utilising media, even if placed some distance apart, should the requirements of any
portion of the line vary, if the output of the local transformer be insufficient, the
deficiency will be made up by drawing from others placed elsewhere. Moreover any
difference of potential at any two or more points will be equalised or minimised by
means of the connecting wires.
For the purpose of regulating the supply of current in the distributing circuit,
independently driven dynamos of suitable electro-motive force, giving either alter-
nating or direct currents as required, may be coupled on to the said circuit at any
desired points.
It is obvious that the primary circuits of the transforming apparatus need not all
be connected in series, but may be connected to more than one primary generator
either separately or in parallel or in parallel' series.
Accumulators or Secondary batteries may be used in conjunction with the direct
current transformers or with dynamos driven by electromotors, or with other dynamos,
for the purpose of regulating the potential and of storing and supplying electric
energy. As the distributing mains receive and distribute locally the principal portion
of the current they carry, they need not be larger (or little larger) than necessary to

page_text: carry the current required locally, and by this means there is no necessity to carry
large and costly conductors throughout the system. In the drawings that accompany
this specification, the primary circuits are shewn by thin lines, and the secondary or
distributing circuits by thick lines, A A are Primary Generators, B B are Secondary
Generators, CC are continuous Current Transformers, D D are Dynamos, and E É
are Motors.
Having now particularly described and ascertained the nature of my inven-
tion and the manner in which the same is to be performed, I declare that what
I claim is
-
1. The system or method of connecting a number of Secondary generators or,
current transformers with their secondary or distributing coils connected in parallel
circuit, their inducing or primary coils being connected in series, or in parallel or in
independent circuits, substantially as shewn and for the purpose set forth.
2. The system or method of connecting a number of dynamos in parallel circuit,
such dynamos being driven by electric motors connected together in series or in
parallel or in independent circuits, substantially as shewn and for the purpose set
forth.
3. The method of reinforcing or supplying the secondary or distributing circuits
above described, or any of them, by means of an independently driven dynamo or
dynamos, substantially as shewn and for the purpose set forth.
Dated this 5th day of January 1888