An Improved System for Electrical Transmission of Power for Traction Purposes by Direct Current.
Year: 1889

page_text: Date of Application, 20th Mar., 1889
Complete Specification Left, 18th Dec., 1889-Accepted, 18th Jan., 1890
PROVISIONAL SPECIFICATION.
An Improved System for Electrical Transmission of Power for
Traction Purposes by Direct Current.
I, MORITZ [MMISCH, of 119 Torriano Avenne, Camden Town, London, in the
County of Middlesex, Electrician, do hereby declare the nature of this invention to be
as follows:-
In this invention I take advantage of the economy effected in electrical transmission
by the employment of what is known as the "three wire system," and apply the same
to the transmission of power for traction purposes by direct current where two tracks
of rails are used one for the up, and another for the down traffic. For this purpose
I regard the rails themselves as what is technically known as the "third" wire in the
above system, for which purpose the tracks are metallically connected together. In
the case of a long line I provide several stations in order to equalize power, and in
such sections where the traffic is heavier than in the others I arrange for more
powerful dynamos and heavier leads.
Each station is provided with two dynamos or as many pairs of same as may be
necessary.
1 provide two insulated conductors one for the up and one for the down
line.
I connect the positive brushes of one half of the dynamos to one of the insulated
conductors and the negative brushes of same to the rails; and at the same time
I connect the positive brushes of the other half of the dynamos to the rails and the
negative brushes to the second conductor.
By these means I do not get any current in the rails if the work on the up and
down lines is equal, and when it is not equal the current passing and the losses
accruing from such current is proportional only to the difference of work in the
two lines of rails.
Dated this 20th day of March 1889.
ALLISON BROS.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved System for Electrical Transmission of Power for
Traction Purposes by Direct Current.
], MORITZ IMMISCH, of 119 Torriano Avenue, Camden Town, London, in the
County of Middlesex, Electrician, 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:—
In this invention I take advantage of the economy effected in electrical transmission
by the employment of what is known as the "three wire system," and apply the
same to the transmission of power for traction purposes by direct current where
two tracks of rails are used, one for the up and another for the down traffic. For
this purpose I regard the rails themselves as what is technically known as the
"third" wire in the above system, for which purpose the tracks are metallically con-
nected together at suitable points. In the case of a long line I provide several stations
in order to equalize power, and in such sections where the traffic is heavier than in
the others I arrange for more powerful dynamos and heavier leads.
Each station is provided with two dynamos or as many pairs of same as may be
necessary.

page_text: I provide two insulated conductors one for the up and one for the down
line.
I connect the positive brushes of one half of the dynamos to one of the
insulated conductors and the negative brushes of same to the rails; and at the
same time I connect the positive brushes of the other half of the dynamos to the rails
and the negative brushes to the second conductor.
By these means I do not get any current in the rails if the work on the up
and down lines is equal, and when it is not equal the current passing and the
losses accruing from such current is proportional only to the difference of work in
the two lines of rails.
The accompanying drawing is a plan view showing diagrammatically the application
of the invention to a circular railway.
The up and down tracks A, A¹, are metallically connected at suitable points.
Band Care the two sets of dynamos, and D and E the two leads or conductors.
The positive brushes of the dynamos B are connected to the conductor D, and
their negative brushes to the rails A, A', while the positive brushes of the
dynamos are connected to the rails A, A', and their negative brushes to the
conductor E.
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
"
The application of the "three wire system to electric railways or tramways,
substantially as specified.