IMPROVEMENTS IN ELECTRIC MOTORS FOR RAILWAY CARS
Year: 1884

page_text: . PROVISIONAL SPECIFICATION.
I, JOHN HENRY JOHNSON of 47 Lincolns Inn Fields in the County of Middlesex
Gentleman do hereby declare the nature of said Invention for "IMPROVEMENTS
IN ELECTRIC MOTORS FOR RAILWAY CARS" which Invention has been com-
municated to me from abroad by Arthur Wollington Adams of St Louis in the
State of Missouri U.S.A. to be as follows:-
The object of this Invention is to provide an arrangement by which the field and
rotating armature of an electric motor and the gearing or transmitting devices
through which motion is communicated from the armature to the wheels of the car
or vehicle can be supported in such manner as to be independent of the body of
the car with a view to permitting the latter to move freely without disturbing the
relations of the motor and transmitting devices to the driven wheel or wheels.
To this end the armature is mounted upon the axle of the driven wheel or
wheels and the field is supported in a frame which is rigidly secured to or formed
in one with the axle or journal boxes of said wheels the said frame also carrying
the intermediate gearing through which the armature is connected to the wheel or
wheels to be driven,
In this way the field and all other parts carried by the frame always occupy the
same relative position to the wheels and armature and are not affected or disturbed
by the spring connection between the body of the car and the wheels or their
truck.
The following may be the arrangement according to this Invention.
A portion of the frame of the body of the truck or car takes a spring bearing on
the box frames of the axle boxes in the usual way-The axle of the driven wheels
of the car carries the armature of the electric motor. This armature is fast upon
a sleeve mounted to revolve on the axle and formed between its ends with a
chamber supplied with a suitable lubricant. The field magnets are fast to cross
bars of a frame whose side bars are rigidly secured to or formed in one with the
axle boxes of the axle of the driven wheels-Between the said cross bars extend
on either side of the motor and in the space between the wheels, auxiliary bars one
of which at the point where it crosses the axle has a sleeve which encircles the
axle and forms a supporting hub on which the cummutator brushes of the motor
11

page_text: are mounted and can be adjusted to operate in conjunction with the commutator of
the armature in the customary way-The motor is connected as usual through the
brushes to the generator or source of electrical energy-The other or auxiliary bar
is intended to carry the intermediate driving gearing-One of the car wheels is
provided with an internal gear wheel formed on or secured to the wheel at or near
the tire. On the revolving armature carrying sleeve is a spur wheel, and inter-
mediate between this and the internal gear wheel is a floating pinion or spur wheel
preferably of paper, wood, or some such material, attached to and supported in the
auxiliary bar and engaging with both the aforesaid spur wheel on the sleeve and
the internal gear wheel-By this arrangement when the armature gear wheel is in
revolution motion will be imparted from it to the car wheel through the inter-
mediate pinion with the result of revolving the driven wheels and their axle in
a direction opposite to that in which the armature moves.
For stopping or starting the car at will the spur wheel on the sleeve is loosely
mounted thereon and is connected and disconnected therefrom at pleasure by
means of a friction or other clutch controlled by the driver or engineer through the
instrumentality of a lever handle or other device suitable for the purpose.
With a view to preventing injurious thrusts of or upon the field supporting
frame it is preferred to interpose springs between its ends and the body of the car.
Under the arrangement described it will be seen that the field of the motor
although it does not revolve, is in effect carried directly by the wheels and their
bearings and retains the same relative position at all time with respect to the same,
so that motions of the body of the car on its springs will not complicate or interfore
with the transmission of power from the motor to the wheels.

page_text: COMPLETE SPECIFICATION.
I JOHN HENRY JOHNSON of 47 Lincolns Inn Fields in the County of Middlesex
Gentleman do hereby declare the nature of this Invention for "IMPROVEMENTS IN
ELECTRIC MOTORS FOR RAILWAY CARS" which Invention has been communicated
to me from abroad by Arthur Wellington Adams of St Louis in the State of
Missouri United States of America and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:
The object of this Invention is to provide an arrangement by which the field and
rotating armature of an electric motor, and the gearing or transmitting devices
through which motion is communicated from the armature to the wheels of the car
or vehicle can bo supported in such manner as to be independent of the body of tho
car, with a view to permitting the latter to move freely without disturbing the
relations of the motor and transmitting devices to the driven wheel or wheels.
To this end the. armature is mounted upon the axle of the driven wheel or
wheels and the field is supported in a frame which is rigidly secured to or formed
in one with the axle or journal boxes of said wheels the said frame also carrying
the intermediate gearing through which the armature is connected to the wheel or
wheels to be driven.
In this way the field and all other parts carried by the frame always occupy the
šame relative position to the wheels and armature and are not affected or disturbed
by the spring connection between the body of the car and the wheels or their
truck.
The nature of this improvement and the manner in which the same is or may
be carried into effect can best be explained and understood by reference to the
accompanying drawing in which Figure 1 is a side elevation and Figure 2 is a plan
of so much of a Railway Car truck as needed for purpose of explanation-Figure 3
is a cross section drawn to an enlarged scale taken axially through the car axlo
on which the armature is mounted. Figure 4 is a section on x-x Figure 2
representing the driven car wheel and gearing by which the same is actuated-The
clutch mechanism is omitted from figure 2 in order not to obscure the other parts.
A represents a portion of the frame of the body of the truck or car, which takes
à spring bearing in the box frames B of the axle boxes C in the usual way. The
car axles are represented at D, and the wheels secured thereon are shown at E, F.
The wheels E in this case are the driven wheels and their axle D carries the
armature G of the electric motor. This armature is fast upon a sleeve H Fig 3
mounted to revolve on the axle, and formed between its ends with an oil chamber a
supplied with a suitable lubricant-The field magnets of the motor are represented
at I. They are fast to cross bars b of a frame whose side bars c are rigidly secured
to or formed in one with the axle boxes C. of the axle of the driven wheels E.
Between the cross bars 6 extend on either side of the motor and in the space
between the wheels, auxiliary bars d and e-The bar d at the point where it
crosses the axle has a sleeve d' which encircles the axle and forms a supporting
hub on which the commutator brushes f of the motor are mounted and can be
adjusted to operate in conjunction with the commutator fl of the armature in the

page_text: customary way. The motor is connected as usual through the brushes to the
generator or source of electrical energy. The manner of connecting being well
known requires no explanation here. The other auxiliary bar e is intended to
carry the intermediate driving gearing. One of the car wheels E is provided with
an internally toothed wheel g formed on or secured to the wheel at or near the tire
On the revolving armature carrying sleeve H, is a spur wheel h and intermediato
between h and g is a floating pinion or spur wheel i preferably of paper, wood or
some such material attached to and supported in the bar cand engaging with
both h and g-By this arrangement when the armature wheel is in revolution,
motion will be imparted from it to the car wheel E through the intermediate
pinion with the result of revolving the wheels Ẹ and their axlo in a direction
opposite to that in which the armature moves.
For stopping or starting the Cars at will the wheel is loosely mounted on the
sleeve H and is connected therewith and disconnected therefrom at pleasure, by
means of a friction or other clutch j of any convenient or known typo controlled
by the driver or Engineer through the instrumentallity of a lever handle k or other
device suitable for the purpose as is well known.
With a view to preventing injurious thrusts of or upon the field supporting
frame, it is preferred to interpose springs I between its ends and the body of
the car.
Under the arrangement described it will be seen that the field of the motor
although it does not revolve, is in effect carried directly by the wheels and their
bearings and retains the same relative position at all timo with respect to the same,
so that motions of the body of the car ou its springs will not complicate or interfere
with the transmission of power from the motor to the wheels.
Having now particularly described and ascertained the nature of the said
Invention and in what manner the same is to be performed I declare that what
I claim is
1st In electric motors for vehicles the combination with the axle which carries
the driven wheels the axle boxes or bearings and a frame secured to, or formed in
one with the said boxes or bearings, of an armature mounted to revolve on the said
axle, the field of the said armature being attached to and carried by the said frame
substantially as and for the purposes hereinbefore set forth.
2nd The combination with the driven wheels their axle and axle boxes or
bearings, and a field supporting frame secured to or formed in one with the said
boxes or bearings, of the armature and field of an electric motor the said armature
and field being carried by the said axle and frame respectively, and intermediate
motion transmitting gearing, also carried by the said frame and engaging on the
one hand with a gear on the driven wheels and on the other with a gear on the
armature hub, substantially as and for the purposes herein before set forth.
3rd The driven wheels, their axle and axle boxes or bearings, and the supporting
frame secured to or formed in one with said boxes or bearings, in combination
with the armature mounted to revolve on said axle, and the field magnets,
commutator brushes, and intermediate motion transmitting gearing, mounted in
and carried by tho said supporting frame, under the arrangement and for operation
substantially as hereinbefore set forth.
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