Improvements in Electric Railways.
Year: 1890

page_text: Date of Application, 4th Nov., 1890-Accepted, 6th Dec., 1890
COMPLETE SPECIFICATION.
Improvements in Electric Railways.
I, MARK WESLEY DEWEY, of 150 North Salina Street City of Syracause, in the
County of Onondaga, in the State of New York, United States of America,
Electrician, do hereby declare the nature of my invention for "IMPROVEMENTS IN
ELECTRIC RAILWAYS" 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 electric railways and consists in certain improvements herein
set forth and shown in the accompanying drawings.
My invention consists in certain improvements in the apparatus shown and
described in my prior Patent for Electric Railways, No. 6492 of 1890.
The object of my invention is to provide new, improved and more effectual or
powerful means for creating or generating counter electro-motive force in the line
working conductor and between the electric connections leading from the said con-
ductor to the motor on the vehicle or car.
To this end my invention consists in the combination in an electric railway, of a
source of irregular or alternating currents, a line working conductor extending there--
from, a series of coils distributed apart along the way and connected with the con-
ductor in series, a vehicle, an electric motor to propel said vehicle, electric connections
between said motor and working conductor, and means carried by the vehicle to cause
the generation of counter electro-motive force in one or more of the said coils near the
vehicle.
My invention consists further and more specifically in the combination in an electric
railway, of a source of irregular or alternating currents, a line working conductor
extending therefrom, a slotted conduit containing the conductor, a series of coils
distributed apart along the way and connected with the conductor in series, an iron
core for each of said coils and having exposed poles extending along the way, a
vehicle, an electric motor to propel said vehicle, electric connections between said
motor and working conductor, an iron body carried by the vehicle and arranged to
make contact with said poles to maintain one or more closed magnetic circuits at or
near the vehicle during its movement, to cause the generation of counter electro-
motive force in one or more of the said coils at or near the vehicle and between the
connections.
My invention consists also in certain other combinations of parts hereinafter
described and set forth in the claims.
In the drawings
Fig. 1 is a side elevation, partly in section, of an electric railway and motor car
embodying my invention,
Fig. 2 is a plan view of the roadbed,
Fig. 3 is a cross section of the railway, slotted conduit and end elevation of car,
Fig. 4 is a modification of Fig. 3, and
Fig. 5 is a side elevation of a rail constructed of sections of magnetic and sections
of non-magnetic metal.
Referring specifically to the drawings, A in the figures represents the vehicle or
car: A¹ the source of irregular or alternating currents; B the supply or line working
conductor connected to said source; c and c are the electrical connections or movable
contacts carried by the vehicle and disposed one, in advance of the other or at each end
of the car and in contact with the conductor B, and H is the track.
D is the vehicle conductor containing the propelling motor and connected to the
contacts c and c¹.
Referring to Figures 1, 2 and 3 of the drawings, F represents an ordinary well
drained slotted underground conduit along the railway and containing the line con-
ductor B suitably supported therein.

page_text: g
D is a shunt-circuit around the motor on the vehicle and contains a current-
regulator d in the form of an adjustable resistance, for shunting more or less current
of the line conductor B around the motor E to control the same. The motor E is
shown connected to the driving-axle h by a belt or chain bnt said motor and driving
axle may, of course, be connected together in any other suitable manner. B' indicates
an insulated return conductor. The electrical contacts c and c' are shown as metallic
brushes, but wheels or rollers arranged vieldingly may be used instead, if desired.
The said contacts are preferably suspended and insulated from the truck-frame a of
the vehicle, the insulation being shown at i.
In order to generate a counter electro-motive force in the line conductor between
the contacts, I provide coils e e and distribute them apart along the railway or path of
the vehicle and connect them with the conductor B in series. Said coils are preferably
placed in the roadbed, between the rails, and an equal distance apart.
I do not limit myself to the distance between the coils, but prefer to place them
apart about the length of the vehicle or car.
el el are cores of paramagnetic material, as iron, for said coils, and arranged with
their axes in a direction at right angles to the track, but with their poles extended to,
beyond, or in proximity to the surface of the roadbed, and located on opposite sides
of the centre thereof. Said poles preferably extend somewhat beyond or above the
surface of the roadbed, are bare or exposed, and also extend along the way or track
on both sides of the coil.
These coils and cores along the railway do not offer much resistance or generate
much counter electro-motive force in the line conductor to the alternating current,
although connected in series, for the well known reason that said cores do not form
complete or nearly complete magnetic circuits. As the counter electro-motive force is
only desired to be created in the coils at or near the car and between the contacts c and c¹,
I provide the car with an iron body n preferably in the shape of a laminated plate as
shown in Figs. 1 and 2 of the drawing, to bridge across between the poles of the
cores e e and thus complete and maintain one or more magnetic circuits. In order
to maintain the magnetic circuit or circuits entirely closed, with variations in the
roadbed, yielding paramagnetic contacts as iron brushes o o are fixed to the body n
above the poles of the cores el el to bear upon the same.
The poles of the said cores are preferably separated more or less to prevent the
lines of force short circuiting through neighbouring cores, and the body n is made
long enough to bridge across from one pole to the other, on both sides of the roadbed
so that when the car is between two coils, there will be some counter electro-motive
force generated in both. The contacts c c or the outside ends of the same are a
sufficient distance apart to make contact with the line conductor on opposite sides of
two coils e e.
If it is desired to make continuous rails of the poles of the cores e¹ they may be
joined together by rails made of diamagnetic metal as bronze, indicated in dotted
lines in Figure 2.
In some cases the ends or poles of the cores e¹ may be formed of the rails or track H
upon which the wheels of the car run, in which case, the wheels and axles may form
the body n carried by the car as, shown in Fig. 4. The last mentioned figure also
shows the core e' laminated to increase the effect.
I do not limit myself to the details of construction as they may be modified in
various ways without departing from my invention.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what
I claim is :-
:-
1-In an electric railway, a source of irregular or alternating currents, a line
working conductor extending therefrom, a series of coils distributed apart along
the way and connected with the conductor in series, a vehicle, an electric motor to
propel said vehicle, electric connections between said motor and working conductor,

page_text: and means carried by the vehicle to cause the generation of counter electro-motive
force in one or more of the said coils near the vehicle.
2-In an electric railway, a source of irregular or alternating currents, a line
working conductor extending therefrom, a series of coils distributed apart along the
way and connected with the conductor in series, a paramagnetic core or body for each
of said coils, a vehicle, an electric motor to propel said vehicle, electric connections
between said motor and working conductor, and means carried by the vehicle to cause
the generation of counter electro-motive force in one or more of the said coils near
the vehicle and between the connections.
3-In an electric railway, a source of irregular or alternating currents, a line
working conductor extending therefrom, a series of coils distributed apart along the
way and connected with the conductor in series, a paramagnetic core or body for
each of said coils, a vehicle, an electric motor to propel said vehicle, electric
connections between said motor and working conductor, and a paramagnetic body
carried by the vehicle to cause the generation of counter electro-motive force in one
or more of the said coils near the vehicle and between the connections.
4-In an electric railway, a source of irregular or alternating currents, a line
working conductor extending therefrom, a series of coils distributed apart along the
way and connected with the conductor in series, an iron core for each of said coils,
pole pieces for said cores extending along the way, a vehicle, an electric motor to
propel said vehicle, electric connections between sail motor and working conductor,
an iron body carried by the vehicle and arranged to cause the generation of counter
electro-motive force in one or more of the said coils at or near the vehicle and between
the said connections..
5 In an electric railway, a source of irregular or alternating currents, a line
working conductor extending therefrom, a series of coils distributed apart along the
way and connected with the conductor in series, an iron core for each of said coils,
pole pieces for said cores extending along the way, and beyond or in proximity to the
surface of the roadbed, a vehicle, an electric motor to propel said vehicle, electric
connections between said motor and working conductor, an iron body carried by the
vehicle and arranged to cause the generation of counter electro-motive force in one
or more of the said coils at or near the vehicle and between the said connections.
6-In an electric railway, a source of irregular or alternating currents, a line
working conductor extending therefrom, a series of coils distributed apart along the
way and connected with the conductor in series, an iron core for each of said coils,
pole pieces for said cores extending along the way and on opposite sides of the centre
of the roadbed, a vehicle, an electric motor to propel said vehicle, electric connections
between said motor and working conductor, an iron body carried by the vehicle and
arranged to cause the generation of counter electro-motive force in one or more of
the said coils at or near the vehicle and between the said connections.
7-In an electric railway, a source of irregular or alternating currents, a line
working conductor extending therefrom, a series of coils distributed apart along the
way and connected with the conductor in series, an irón core for each of said coils,
pole pieces for said cores extending along the way, and on opposite sides of the centre
of the roadbed, a vehicle, an electric motor to propel said vehicle, electric connections
between said motor and working conductor, an iron body carried by the vehicle and
arranged in suitable inductional relation to said poles to cause the generation of
counter electro-motive force in one or more of the said coils at or near the vehicle and
between the said connections.
8-In an electric railway, a source of irregular or alternating currents, a line
working conductor extending therefrom, a series of coils distributed apart along the
way and connected with the conductor, an iron core for each of said coils and having
exposed poles, a vehicle, an electric motor to propel said vehicle, electric connections
leading to the motor, an iron body carried by the vehicle and arranged to make
contact with said poles to maintain one or more closed magnetic circuits at or near the
vehicle during its movement.

page_text: 9 In an electric railway, a source of irregular or alternating currents, a line
working conductor extending therefrom, a series of coils distributed apart along the
way and connected with the conductor in series, an iron core for each of said coils and
having exposed poles extending along the way, a vehicle, an electric motor to propel
said vehicle, electric connections between said motor and working conductor, an iron
body carried by the vehicle and arranged to make contact with said poles to maintain
one or more closed magnetic circuits at or near the vehicle during its movement, to
cause the generation of counter electro-motive force in one or more of the said coils
at or near the vehicle and between the connections.
10-In an electric railway, a source of irregular or alternating currents, a line
working conductor extending therefrom, a series of coils distributed apart along the
way and connected with the conductor in series, a laminated iron core for each of said
coils and having exposed poles extending along the way, a vehicle, an electric motor
to propel said vehicle, electric connections between said motor and working conductor,
a laminated iron body carried by the vehicle and arranged to make contact with said
poles to maintain one or more closed magnetic circuits at or near the vehicle during
its movement, to cause the generation of counter electro-motive force in one or more
of the said coils at or near the vehicle and between the connections.
11-In an electric railway, a source of irregular or alternating currents, a line
working conductor extending therefrom, a series of coils distributed apart along the
way and connected with the conductor in series, an iron coro for each of said coils and
having exposed poles extending along the way, a vehicle, an electric motor to propel
said vehicle, electric connections between said motor and working conductor, an iron
body carried by the vehicle and arranged to make a yielding or flexible contact with
said poles to maintain one or more closed magnetic circuits at or near the vehicle
during its movement to cause the generation of counter electro-motive force in one or
more of the said coils at or near the vehicle and between the connections.
12-In an electric railway, a source of irregular or alternating currents, a line
working conductor extending therefrom along the railway, a series of coils connected
to the conductor and distributed at intervals along the way, cores for the coils having
their poles in contact with the rails, a rail along the railway constructed of sections
of iron and alternate sections of non-magnetic metal, a vehicle, an electric motor to
propel said vehicle, electric connections between said motor and working conductor,
and paramagnetic or iron wheels and axles for the vehicle.
13 In an electric railway, a source of irregular or alternating currents, a line
working conductor extending therefrom along the railway, a series of coils connected
to the conductor and distributed at intervals along the way, cores for the coils having
their poles in contact with the rails, rails along the railway parallel with each other,
each constructed of sections of iron and alternate sections of non-magnetic metal, a
car, an electric motor to propel said car, electric connections between said motor and
working conductor, and an iron body moved with the car and making contact with
said rails.
14 In an electric railway, a source of irregular or alternating currents, a line
working conductor extending therefrom, a slotted conduit containing the conductor, a
series of coils distributed apart along the way and connected with the conductor in
series, a vehicle, an electric motor to propel said vehicle, electric connections between
said motor and working conductor, and means carried by the vehicle to cause the
· generation of counter electro-motive force in one or more of the said coils near the
vehicle.
15 In an electric railway, a source of irregular or alternating currents, a line
working conductor extending therefrom, a slotted conduit containing the conductor,
a series of coils distributed apart along the way and connected with the conductor in
series, an iron core for each of said coils and having exposed poles extending along
the way, a vehicle, an electric motor to propel said vehicle, electric connections between
said motor and working conductor, an iron body carried by the vehicle, and arranged
to make contact with said poles to maintain one or more closed magnetic circuits at

page_text: or near the vehicle during its movement, to cause the generation of counter electro-
motive force in one or more of the said coils at or near the vehicle and between the
connections.
AL
1
MARK WESLEY DEWEY.
Haseltine, Lake & Co.,
45, Southampton Buildings, London, Agents for the Applicant.