Driving-gear for Railway and Tramway Vehicles.
Year: 1890

page_text: Date of Application, 6th Oct., 1890-Accepted, 8th Nov., 1890
COMPLETE SPECIFICATION.
[Communicated from abroad by KRAMER & Co., of Berlin, in the Empire of
Germany.]
Driving-gear for Railway and Tramway Vehicles.
I, CHARLES DENTON ABEL, of No. 28 Southampton Buildings, Chancery Lane, in
the County of London, Consulting Engineer and Patent Agent, 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 to driving gear for railway and tramway vehicles which are
noi driven directly by a crank mechanism, as with ordinary locomotive engines, but by
a motor operating with rotary motion.
The construction must in this case be so arranged as to fulfil two conditions:
1. The motor must be fixed to the spring-supported framing of the vehicle in order
to be protected from concussions.
2. The vibrations of the wheel axle due to concussions must not be transmitted
through the driving gear to the axis of the motor.
For fulfilling these conditions, two arrangements have heretofore been employed.
1. The motor engine has been mounted quite independent, and in an elastic manner
upon the upper framework or bed, and the power has been transmitted through ropes,
cords, or chains to the wheel axles.
2. The motor, or the framing carrying the same, has been so connected that the one
end was suspended from the spring-supported framing of the vehicle while the other
end was made to embrace the wheel axle so as to partake of the vibrations thereof.
The first named construction, whereby the power is indirectly transmitted, renders
the motor engine perfectly free from the concussions to which the axles are subject,
while the second arrangement possesses the advantage that direct transmission through
toothed wheels can be employed, but on the other hand this causes concussions to be
transmitted through the driving gear to the motor engine.
The present invention relates to an arrangement of driving gear which while it
transmits the power directly to the wheel axle, does not transmit the concussions of
the latter to the motor.
I will describe the construction of the improved driving gear with reference to the
accompanying drawings in which
Fig. 1 shews a part cross section of the vehicle frame with the driving gear and
Fig. 2 shews a side view of the driving gear and section through the wheel axle ;
Fig. 3 shews a front and side view of the disc m,
Fig. 4 a front and side view of the ring r, and
Fig. 5 a front view of and section through the toothed wheel ='.
a is the wheel axle in its normal position; the toothed wheel by which the axle
is driven, is not fixed on the latter, but runs loose on the tubular hub through which
the axle a passes. The bracket carrying the hub is fixed to the upper or spring-
supported framing of the vehicle, and it has the motor engine frame fixed rigidly
to it.
The motor M, which is here shewn as an electromotor, acts on the toothed wheel Z²
which gears directly with the wheel 7. On the rotation of the motor shaft, the wheel Z'
will consequently be driven in a corresponding manner, and the motion of this wheel
is imparted to the axle a in the following manner.
The axle has fixed on it the carrier-disc m (Fig. 3) having two pins bb. To the
latter are attached the one end of links g g the other ends of which are connected to
pins ce upon a ring r (Fig. 4) and consequently are at a fixed distance apart.
The toothed wheel has also two corresponding pins d d, (Fig. 5) which are

page_text: connected to the pins ce on the inner side of the ring r, by two other links ff, shewn
in dotted lines at Fig. 2.
From this arrangement it will be seen that any vibratory motion of the axle
produced by concussion will have no effect on the rotating gear, and the motor will
consequently be free from any effect of such concussion, notwithstanding the direct.
transmission of motion by toothed gear.
In place of the links and may be used any equivalent mechanical device such as
springs &c.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
In driving gear for transmitting the motion of a rotary motor to the wheel-axle of
railway and tramway vehicles, the combination of a toothed wheel driven directly by
the motor shaft, and mounted loose on a tubular boss fixed to the motor frame, through
which boss the wheel axle passes, a disc fixed on the wheel axle, and articulated con-
necting devices connecting said disc with the toothed wheel, whereby any vibrations
of the wheel axle due to concussions are prevented from being transmitted to the
motor and the rotary motion of the toothed wheel is transmitted in a uniform manner
to the wheel axle, substantially as described.
Dated this 6th day of October 1890
ABEL & IMRAY,
Agents for the Applicant.