Improvements in or relating to Driving Mechanism for Motor Road Vehicles.
Year: 1899

page_text: Date of Application, 1st June, 1899
Complete Specification Left, 28th Feb., 1900—Accepted, 1st June, 1900
Improvements in or relating to Driving Mechanism for Motor Road
Vehicles.
A communication from CHARLES HUGOT, Mechanical Engineer, of 8, Rue Sainte
Apolline, Paris, in the Republic of France.
I, ALFRED JULIUS BOULT, of 111, Hatton Garden, in the County of London,
Chartered Patent Agent, do hereby declare the nature of this invention to be as
follows: -
This invention relates to driving mechanism for motor road vehicles and com-
prises a divided shaft carrying two wheels at say the rear portion of a motor
tricycle or vehicle; one of which wheels (for instance that on the left) being fixed
on its revolving axle, while the other (that on the right) rotates loosely with
its hub on its axle. It should be understood that these two axles are arranged
in line with each other and suitably connected at their common, axial and central
junction, in a socket in the middle space between the two wheels, constituting a
shaft in two parts, connected and capable of rotating together or separately, one
part being fixed, the other movable. This arrangement is to effect the mechanical
movements of transmission to the parts adapted for the purpose without the use
of gearing or transmission belts, the shaft of the loose wheel being in con-
nection with the differential gear of the motor.
The construction and operation of the apparatus may be described by way of
example when applied to a tricycle, viewed from the rear.
The left wheel is fixed to the left axle, the latter being in line with the right
axle, the two being constructed to rotate together or separately. On the right
axle is arranged a loose wheel, surrounding the axle with its hub. The shaft
is in connection with the differential gear of the motor for driving the vehicle.
The right axle is provided with a plate or friction gearing fixed to the hub of
the loose wheel independently of a brake pulley for starting the vehicle worked
by a hand-fly-wheel carried on a vertical axis.
It follows then, when the motor vehicle is at rest the right shaft is turned
quickly by momentarily applying an outside crank to the right shaft on which
the loose wheel is mounted the vehicle will not move but the differential gear
of the motor will be actuated thereby starting the electric ignition device in
combination with the carburettor, thus starting the motor without however in-
volving the vehicle in movement. Then, as soon as ignition has been started
the crank is withdrawn.
The rider then takes his place in the vehicle and by actuating the starting
brake or lever effects a start the right hand axle and that of the left provided
with the fixed wheel starting the vehicle. The steering rod is then taken in
hand and by means of a hand lever or device located on the steering tube the
plate or friction device of the hub of the loose wheel on the right is brought
into gear. By this operation the two wheels become firmly united and the
vehicle moves naturally.

page_text: A more or less energetic friction produced by means of the starting device
will produce a greater or lesser velocity of movement a maximum friction pro-
ducing a maximum velocity.
Finally, to produce a sudden stoppage the plate or friction device is disen-
gaged whereupon the motor no longer acts on the right hand wheel (driving
wheel) but rotates freely. Two distinct pedal brakes acting on brake pulleys
on the two axles, allow the stoppage of the fixed left hand wheel, by holding the
steering rod; the starting brake having been previously released.
Dated this 1st day of June 1899.
BOULT & WADE,
Agents for the Applicant.
Improvements in or relating to Driving Mechanism for Motor Road
Vehicles.
A communication from CHARLES HUGOT, Mechanical Engineer, of 8, Rue Sainte
Apolline, Paris, in the Republic of France.
1, ALFRED JULIUS BOULT, of 111, Hatton Garden, in the County of London,
Chartered 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 ascer-
tained in and by the following statement:-
This invention relates to driving mechanism for motor road vehicles and com-
prises a divided shaft, carrying two wheels, at say the rear portion of a motor
tricycle, or vehicle; one of which wheels (for instance that on the left) being fixed
on its revolving axle, while the other (that on the right) rotates loosely with
its hub on its axle. It should be understood that these two axles are arranged
in line with each other and suitably connected at their common axial and central
junction, in the middle space between the two wheels, constituting a shaft in
two parts, connected by differential gearing, and capable of rotating together or
separately, one part of the gear being fixed, the other movable on its shaft.
This arrangement has been devised in order to effect all the necessary mechanical
movements of transmission without the use of supplementary gearing and trans-
mission belts, the shaft of the loose wheel being in connection with the differen-
tial gear of the motor.
The construction and operation of the apparatus may be described by way of
example when applied to a tricycle, viewed from the rear, as shown in the accom-
panying drawing.
The left wheel a is fixed to the left axle the latter being in line with the
right axle c, the two being arranged to rotate together or separately, according
to requirements. On the right axle e is mounted a road wheel dits hub being
loosely mounted on the axle c. The shaft is in connection with the differential
gear of the motor for driving the vehicle. (The differential gear may be any
desired construction, and is represented in the accompanying drawing) by the
parts marked e.
This right axle e is provided with a clutch plate or friction
gearing to engage or gear with the hub of the loose wheel when required. The
shaft is provided with a fixed pulley f upon which acts a brake band when
starting the vehicle as will be explained hereinafter. The brake band may be
operated by turning a hand wheel carried on a vertical shaft in front of the driver.
The clutch member k, can move longitudinally on the shaft and when it is
desired to connect the wheeld to the to the shaft the memberk is moved towards

page_text: the right on the said shaft by a lever i operated from any convenient part of the
vehicle, preferably from near the steering lever or arm.
The left shaft 6 on which the wheel a is fixed carries another fixed pulley /
also provided with a brake band for stopping the vehicle. This band has its
ends connected with longitudinal bars operated by a pedal, the latter being
located close to the feet of the driver, say to the right of the steering tube, as
is customary in many motor cars.
The two shafts b and c each turn in two bearings m mounted on the frame of
the vehicle. Finally the inner ends of the shafts b and c facing each other are
connected to the central gear wheels of a differential movement device e of any
suitable kind, provided with an outer pinion or teeth gearing with the actuating
pinion h of the motor, which may be placed either in front or behind the cross
bar to which the motor is generally connected by means of suitably arranged
braces and stays.
WORKING OF THE APPARATUS.
In order to start the motor when the vehicle is at rest, to the outer squared
end of the shaft c, a crank handle g is applied and rapidly turned. The vehicle
will not move forwards since the clutch coupling is out of gear. But the inner
end of the shaft c will start the movement of the differential gear e, and, the
outer teeth of the latter gearing with the pinion h of the motor, the latter will
be started. This motor is not represented since it can be a motor of any suit-
able kind. The crank is now withdrawn and the ignition device started,
whereupon the motor will continue to act automatically, without, however, pro-
pelling the vehicle.
The driver now takes his place in the vehicle, and applies the brake to the
pulley keyed on the shaft c, by means of a hand wheel keyed on a vertical
shaft arranged parallel with the steering shaft and connected with a steel-band
passing round the pulley f. At the same time the bell crank lever i is operated
through a handle, arranged by the side of the steering shaft, and intermediate
connections so as to clutch the wheel d to the shaft c, and the two wheels a and d
will rotate together.
To suddenly stop the carriage the clutch device k is thrown out of action,
whereupon the wheel d is rendered loose on its shaft c. Next the brake is applied
to the pulley on the left shaft b, by depressing the pedal lever. It need not
be stated here that previously, or at the same time, the igniter and the admis-
sion of the explosive gas is stopped, or cut off.
It should be observed here that the pulley f may also act in combination with
the pulley to assist the latter in stopping the vehicle.
When inclines have to be ascended the two wheels turn together and the brake
on the fixed pulley is cased, in consequence of which the small speed of the
device is utilized, the motor always yielding constant work at the maximum
power.
When desirous of travelling at high speed, the clutch device k is thrown out
of engagement so that the hub of the right wheel b becomes free on its shaft_c,
which is rendered immovable by applying the brake to its pulley f, while the
left shaft continues to revolve involving in its movement the fixed wheel a, to
which the great speed is applied by the differential gear in connection with
the motor through the pinions h and the outer teeth of the gear. The loose
wheeld only revolves in consequence of the movement of the vehicle.
Having now particularly described and ascertained the nature of the said
invention as communicated to me by my foreign correspondent and in what
manner the same is to be performed, I declare that what I claim is: —
1. Driving mechanism for motor road vehicles comprising a motor, a divided
driving shaft connected by a differential gearing one shaft portion having a road
wheel fast on it and a brake pulley, the other shaft portion having a road wheel

page_text: loosely mounted on it, a clutch or other gearing to connect said wheel to said
shaft and a brake pulley on said shaft, substantially as described.
2. In a driving mechanism of the kind described a part shaft capable of being
rotated within the road wheel hub by a crank handle, a differential gearing on
said shaft connected to the motor mechanism, whereby by turning the shaft by
hand the motor may be started through the differential gearing substantially as
described.
3. The complete driving mechanism for road motor vehicles substantially as
described or illustrated in the accompanying drawing.
Dated this 28th day of February 1900.
BOULT, WADE & KILBURN,
Agents for the Applicant.