Year: 1899

page_text: 1. LOUIS BARDOx, of 61. Boulevard National. Clichy (Seine), in the Republic
of France, Engineer, do hereby declare the nature of this invention to be as
follows:-
--
My improved driving gear for motor road vehicles comprises a motor having a
single cylinder with two pistons acting in opposite directions relatively to each
other.
These pistons jointly transmit by connecting rods rotation to two crank shafts
and therefrom by means of gearing to a distributing shaft these parts being all
arranged symmetrically relatively to the axle of the vehicle. The two crank
shafts carry fly wheels to ensure regularity of motion.
Af or about the centre of the distributing shaft is keyed a disc having a double-
bevelled edge and upon each side of this disc plates are arranged having their
inner faces hollow and shaped to conform to the said disc. These hollow faced
plates are free to slide on the distributing shaft and are acted on by springs
which tend to press them against the disc.
These plates are keyed upon sleeves adapted to slide and turn freely upon the
shaft their movement along the shaft, although very slight, being obtained by
means of two forks pivotally connected to the vehicle and engaging with grooves
provided in the sleeves.
These forks can be actuated by a cam carrying a toothed sector which gears
with a similar sector fixed to a lever mounted on a suitable part of the vehicle
or by any other equivalent arrangement.
One of the sleeves carries a set of gear wheels (say four of different diameters)
a similar set of wheels being keyed on a sleeve which is free to turn on a shafi
arranged parallel to the distributing shaft. The object of these gear wheels is
to transmit movement from the distributing shaft to the shaft carrying the other
set of gear wheels at a ratio varying according to which pair of gear wheels is
thrown into gear.
By the aid of any known mechanism this change of speed may be effected and
I may utilise the said gear wheels for effecting the back movement of the vehicle.
The shaft passing through the sleeve which carries the latter set of gear wheels
is separated into two paris, connected together by differential mechanism gearing
with the sleeve and carries at its two ends chain wheels which by means of chains
transmit movement in the driving wheels of the vehicle.
The driving mechanism described is mounted on a suitable frame, composed
for example of longitudinal and transverse beams or bars provided with holes
to receive the bolts by which to fasten the whole mechanism to the vehicle.
Dated this 1st day of May 1899.
JOHNSONS & WILLCOX.
47, Lincoln's Inn Fields, London, W.C., Agents.

page_text: 1. Louis BARDON, of 61, Boulevard National, Clichy (Seine), in the Republic
of France. 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:—
My invention relates to improvements in driving gear for motor road vehicles;
1 will describe the same with reference to the accompanying drawing which
illustrates in plan parity in horizontal section driving gear constructed in accord-
ance with this invention.
The driving gear comprises a motor, having a single cylinder a with two
pistons acting in opposite directions relatively to each other.
These pistons jointly transmit rotation by connecting rods c to two crank
shafts and therefrom by means of hevel wheels e and to a distributing shaft g
these parts being all arranged symmetrically relatively to the axle of the vehicle.
The two crank shafts carry fly wheels to ensure regularity of motion.
At or about the centre of the distributing shaft is keyed a disc having a
double-bevelled alge, and upon each side of this dise plates are arranged
having their inner faces hollow and shaped to conform to the said dise i.
These hollow faced plates are guided by studs m and are acted on by springs a
which tend to press them against the disc i
"
The said plates j, k, are keyed upon sleeves o. p adapted to slide and turn
freely upon the shaft g their movement along the shaft, although very slight.
being obtained by means of two forks y pivotally connected to the vehicle at r
and engaging at their free ends with grooves of and provided in the aforesaid
sleeves and p.
"
These forks can be actuated by a cam & carrying a 100thed sector & which gears
with a similar sector fixed to a lever mounted on a suitable part of the vehicle.
the function of this or any other equivalent arrangement being to separate or
bring together the free ends of the forks.
The transmission shaft is separated into two parts connected together by
differential mechanism enclosed in a box y the prolongations of which form a
sleeve the said shaft carries at its two ends chain wheels te which by means of
chains transmit movement to the driving wheels of the vehicle.
A series of gear wheels are preferably employed for transmitting motion from
the shaft g to the shafte by means of which three different degrees of speed for
example can be obtained.
On the sleeve o a set of gear wheels 1, 2, 3 are keyed, a similar set 4, 5 and 6
being mounted on the sleeve y which is free to turn on the shaft r. This last sel
of gear wheels may be formed on one boss 11 as shewn in the drawing or keyed
on to a sleeve sliding on the sleeve y and engaged to rotate therewith by the
key 7.
A fork 8 pivoted at 10 to the frame and engaging at its free end in the
groove is used to cause the longitudinal movement of the series of gear
wheels 4, 5 and 6. The distances separating the gear wheels from each other
on each shaft are so arranged that when in the central position shewn in the
drawing the two sets are out of gear and that when the fork S is displaced to one
side or to the other a single pair of wheels either 1 and 4 or 2 and 5 or 3 and 6
will come into gear with each other.
Or this change in speed may be obtained by any known means and the gear
wheels may also be utilized for reversing the movement of the vehicle.
The driving mechanism described is mounted on a suitable frame 12 composed

page_text: for example of longitudinal and transverse beams or bars provided with holes 13
to receive the bolts by which the whole mechanism is fastened to the carriage.
Having now particularly described and ascertained the nature of my invention
and in what manner the same is to be performed, I declare that what I
claim is:-
1. Driving gear for motor road vehicles comprising a motor having a single
cylinder and two pistons which transmit rotation to a distributing shaft, a dise
carried thereon, and two plates actuated by friction from the said disc, secured
to sleeves surrounding this shaft. one of the said sleeves transmitting, by any
suitable speed changing mechanism, the rotary motion to a second shaft which
carries the differential mechanism and the chain wheels transmitting movement
to the driving wheels of the vehicle, substantially as hereinbefore described and
represented in the accompanying drawing,
2. In driving gear of the kind described, the double-friction coupling formed
by a disc such as 7 and by two friction plates such as actuated by any suitable
means, substantially as hereinbefore described with reference to the accompanying
drawing.
3. In driving gear of the kind described speed changing mechanism com-
prising two sets of gear wheels, one set such as 1, 2, 3, being mounted on the dis-
tributing shaft g, and the other set such as 4, 5 and 6 being capable of longitudinal
movement along the sleeve y rotating with the transmission shaft r, the said gear
wheels being operated substantially as and for the purpose hereinbefore described
and shewn in the accompanying drawing.
Natal the. 90 I 1900
JOHNSONS & WILLCOX.
47, Lincoln's Inn Fields, London W.C., Agents.