Year: 1886

page_text: Date of Application, 24th Apr., 1886.
Complete Left, 22nd Jan., 1887.
Complete Accepted, 8th Mar., 1887.
Transmission of Power therefrom.
I, MICHAEL HOLROYD SMITH of Royal Insurance Buildings, Halifax in the County
of York, Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates generally to dynamo electric machines when employed for
producing motive power, the invention being particularly applicable to the employment
of electric motors for the propulsion of tram or railway cars where the ends generally
sought to be obtained are efficient and powerful motors within the smallest possible
limits of space together with such an adjustment of the parts that the working of the
whole may be reliable and not subjected to derangement undue strain or friction.
owing to the varying movement of the car upon which it is carried.
The invention consists in the arrangement and combination of parts as hereinafter
indicated, by which the desired ends may be practically secured.
In order to occupy as little room as possible beneath the floor of the car the electric
motor is made flat by arranging the magnets, yoke and armature spindle all in the
same plane. When double magnets are used the armature spindle passes through
both yokes but when single magnets are used, the spindle will pass through one yoke,
the other end being carried in a bracket of non magnetic material secured to the
fields of the magnets. The motor is provided with studs or trunnions and by means
of links is swung beneath the framework forming the flooring of the car. These links
compensate for the varying relative position of the car and axle due to varying loads
and the action of the springs. The yoke at the end of the motor opposite to the
commutator is provided with a boss which is fitted with a swivel bracket having arms
extending to a casing surrounding the gearing upon the axle, these arms are rigid
vertically, but permit of horizontal movement, either by being hinged or made of
flexible metal plates. The gearing consists of a worm and worm wheel and the
surrounding casing is constructed to protect the gear, form an oil cup and contain the
bearings for the worm shaft and blocks to sustain the end thrusts. The worm shaft
is provided preferably with an elliptical knob or enlarged end working in brasses

page_text: adapted to receive the end thrust. The worm shaft and armature spindle may be in
the same line but in order to provide for strains and twists are connected by a flexible
coupling consisting of a short shaft between the worm and armature spindles the ends
of each terminating in projecting arms rims or saucers to which are attached leather
or other flexible cones, so arranged that the apex of one cone meets the apex of the
cone on the end of the shaft section next in order. Blocks of metal or other material
are inserted in the cones and connecting bolts are passed through in order to hold the
cones and blocks firmly together.
The construction described gives a virtually flexible armature shaft which while
effective in transmitting the driving power, allows for any jolting or jumping of the
car without imparting strain or undue friction to the various parts its action besides
being comparatively noiseless when compared to chain or other gearing usually
employed.
It will be obvious that this arrangement of motor, flexible shaft, and casing, may be
employed for transmitting power for various other purposes.
PHILIP M. JUSTICE,
55 & 56, Chancery Lane, London,
Applicant's Agent.

page_text: Transmission of Power therefrom.
I, MICHAEL HOLROYD SMITH of Royal Insurance Buildings Halifax in the County
of York, 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 :-
This invention relates generally to the arrangement of dynamo electric machines and
their connected parts when employed for producing motive power, the invention being
particularly applicable to the employment of electric motors for the propulsion of tram
or railway cars where the ends generally sought to be obtained are efficient and
powerful motors within the smallest possible limits of space, together with such an
arrangement and adjustment of the connected parts, that the working of the whole
may be reliable, and not subject to derangement undue strain or friction owing to the
varying movement of the car upon which it is carried.
The invention consists in the arrangement and combination of parts as hereinafter
indicated, by which the desired ends may be practically secured.
In order that my invention may be clearly understood reference is made to the
accompanying drawings forming part of the specification and in which :—
Fig. 1 represents in side elevation the platform of a car with the motor and
connected parts attached thereto.
Fig. 2 represents a plan view of Fig. 1.
Fig. 3 represents in side elevation the platform of a car with a motor of ordinary
construction connected thereto in accordance with my invention.
Fig. 4 represents a plan view of Fig. 3.
Fig. 5 represents partially in section an elevation of one of the driving wheels with
attached parts.
Fig. 6 represents a section on the line xx, of Fig. 5.
Fig. 7 represents an elevation of driving gear when two worms are employed to
drive the wheel.
Fig. 8 represents in side elevation the flexible attachment between the motor and
wheel frames.
Fig. 9 represents a plan of the same.
Fig. 10 represents partially in section the flexible coupling employed between the
motor spindle and driving shaft.

page_text: Fig. 11 represents a section of the same on the line y y, Fig. 10.
Fig. 12 represents an elevation of a double armature motor.
Fig. 13 represents the same when placed between and employed to drive two pairs
of wheels, part being broken away.
Fig. 14 represents a side clevation of the same. In this construction the motor is
carried on rubber or other springs or supports k, k, resting on brackets L, which run
from the gear casing F to supporting blocks 1, 1, on the next axle the fit being a loose
one so as to permit of a certain amount of play and thus compensate for the various
inotions of the two axles.
Fig. 15 represents a double armature motor when placed external to, but employed
to drive two pairs of wheels.
In all the figures like letters of reference are used to designate like parts of the
apparatus.
In order to occupy as little room as possible beneath the floor of the car, the electric
motor is preferably made flat and this may be done by arranging the magnets A, A,
yoke B, and armature spindle C, all in the samo plane, as clearly shown in Figs. 1 and 2.
Whon double magnet motors are used, the armature spindle passes through the
framos B1, B2, as shown in Fig. 4 but when single magnet motors are used, of the
kind represented in Figs. 1 and 2, the spindle C will pass through the yoke B,
the other end being carried in a bracket a of non-magnetic material secured to the
fields of the magnets A, A. When the motor actuates one axle only it is provided
with studs or trunnions b, b, and by means of links d, d, is swung beneath the frame-
work forming the flooring of the car. These links d, d, compensate for the varying
relative position of the car and axle due to varying loads and the action of the springs.
The.
-yoke B or frame B₁ at the end of the motor opposite to the communicator is
provided with a swivel bracket e e, the arms of which extend to a casing F,
surrounding the gearing upon the axle, these arms e, e, are rigid vertically, but
permit of horizontal movement either by being hinged as shown in Figs. 1, 2, 8 and 9,
or made of flexible metal plates as shown in Figs. 3, 4 and 13. The gearing consists
of a worm D and worm wheel E. The surrounding casing F is preferably constructed of
cast iron and is formed in parts, the lower portion protects the bottom of the worm
wheel from dust and also forms an oil box to catch and hold the oil, the top portion
is formed in two longitudinal sections which are bolted together and carry the
bearings 9,
for the worm shaft D, the end section carries the thrust box G, and forms
an oil cup or reservoir. The worm shaft D may be turned from a single bar of steel
and the thrust bearing preferably consists of an elliptical knob or an enlarged grooved
end working in brasses G, adapted to receive the end thrust as clearly shown in
Fig. 5. The worm shaft D and armature spindle Care placed in the same line, but
in order to provide for strains and twists they are connected by a flexible coupling
consisting of a short shaft H, between the worm spindle D, and armature spindles C,
as will be clearly seen on reference to Figs. 10 and 11 in which the short shaft H is
shown as of cruciform shape in cross section, the ends of the projecting parts being
slightly enlarged and rounded in all directions so that they may move with but little
friction in the box ends I, in which they are a loose fit, said box ends are bolted to the
bosses J, which are attached to shafts C, D, and may contain buffers to prevent
rattling of the parts. Or instead of this arrangement, to the box ends may be
attached leather or other flexible cones, so arranged that the apex of one cone meets
the apex of the cone on the end of the shaft section next in order. Blocks of metal or
other material are inserted in the cones, and connecting bolts are passed through in
order to hold the cones and blocks firmly together.
The construction described gives a virtually flexible armature shaft which while
effective in transmitting the driving power, allows for any jolting or jumping of the
car without imparting strain or undue friction to the various parts, its action besides
being virtually noiseless.
It will be obvious that this arrangement of motor, flexible shaft, and casing, may be
employed for transmitting power for various other purposes,

page_text: 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. For electrically driven rail or tramway cars the means of transmitting the
power from the electric motors consisting of the worm and worm wheel and thrust
block, all enclosed in a suitable casing substantially as described and as illustrated in
the accompanying drawings.
2nd. For electrically driven rail or tramway cars the method of swinging or
suspending the motor under the car in such a manner as to allow for all movements
of the car and axles substantially as set forth.
3rd. In the transmission of power from an electric motor to any positive gearing
upon a rail or tramway car the use of a flexible coupling between the said motor and
gear substantially as set forth.
4th. In the transmission of power from an electric motor to any positive gearing
upon a rail or tramway car the combination with the flexible coupling between said
motor and gearing of flexible attachments between the motor yoke or frame and the
gearing casing or bearings substantially as described.
PHILIP M. JUSTICE,
55 & 56, Chancery Lane, London,
Applicant's Agent.