Year: 1899

page_text: Date of Application, 9th Jan., 1899
Complete Specification Left, 3rd Oct., 1899-Accepted, 25th Nov., 1899
A communication from RAOUL COUTANT-DUJOUR, and EMILE SALMSON, of Paris,
in the Republic of France.
I, ALFRED JULIUS BOULT, of 111, Hatton Garden, in the County of Middlesex,
Chartered Patent Agent, do hereby declare the nature of this invention to be
as follows:
The present invention relates to improvements in traction engines or road
rollers such as are used for rolling of macadamised roads whereby it is intended
to replace the steam roller or traction engine, generally used, by a niotor driven
by petroleum or other heavy oil, whereby the advantage is secured, that the
frequent watering and coaling necessary for steam rollers is avoided as the oil
motor can be supplied at long intervals with the fuel required for several weeks
of continuous work.
The crank shaft of the motor is provided on the side opposite the fly-wheel
with a toothed pinion which through gearing transmits the movement to an
intermediate shaft. The same gearing by means of a second wheel of the same
dianieter transmits the movement to a third shaft in such manner that the two
shafts are rotated in contrary direction.
On these two shafts are mounted coupling drums or clutches which are loose there-
on as well as the pinions which are also connected to the coupling drums. These
pinions serve to transmit the movement to the vehicle in one or the other direc-
tion-according as one or the other pinion is coupled to its shaft, by means of
a central wheel secured to a shaft which also carries at one end another pinion
geared to the toothed rim or wheel secured to the road wheel of the vehicle.
The intermediate pinions, with their shafts are alternately coupled by means
of a double pivotted lever worked by a hand lever and rod. The ends of the
double armed lever are connected to or act upon sleeves working on ribs on the
intermediate shafts in such manner that as the arms of the double armed lever
are moved in one or the other direction by means of the hand lever so one or
the other of the two intermediate pinions which as has been explained before
turn in opposite directions becomes released or coupled to the centre driving
shaft whereby the road-roller is made to advance or to move backwards as the
case may be.
When the double armed lever is so placed as to uncouple both pinions with
a view of dropping the vehicle the lever which is provided also with the pro-
longation acts on the boss of a brake the shoes of which press against the inter-
mediate pinions so that the roller can be stopped even on roads of steep declivity.
Dated this 9th day of January 1899.
BOULT & WADE,
Agents for the Applicant.

page_text: A communication from RAOUL COUTANT-DUJOUR and EMILE SALMSON, of Paris,
in the Republic of France.
I, ALFRED JULIUS BOULT, of 111, Hatton Garden, in the County of Middlesex,
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:-
The present, invention relates to improvements in traction engines or road
rollers such as are used for rolling of macadamised roads whereby it is intended
to replace the steam roller or traction engine, generally used, by a motor driven
by petroleum or other heavy oil, whereby the advantage is secured, that the
frequent watering and coaling necessary for steam-rollers is avoided as the oil
motor can be supplied at long intervals with the fuel required for several weeks
of continuous work.
In order to render the nature of the invention more intelligible, the accompany-
ing drawing illustrates, by way of example only, in
Figure 1 a side elevation of a road-roller constructed according to this inven-
tion, and in
Figure 2 a plan corresponding to Figure 1 showing part of the machine
removed in order to permit the transmission gearing for driving and change of
direction of movement to be seen.
Figure 3 is a detail view of the brake, and
Figure 4 a cross section on the line A-B of Figure 3.
The crank of the motor m, which revolves in the direction indicated by the
arrow is provided on the side opposite the fly-wheel with a toothed pinion h
which, through the gearing i, transmits the movement to an intermediate shaft b.
The same gearing i by means of a second wheel j, of the same diameter, transmits
the movement to a third shaft c, in such manner, that the two shafts b and c are
rotated in contrary directions as indicated by the respective arrows; Figure 1.
On these two shafts b and c are mounted coupling drums or clutches k and l,
which are loose thereon, as well as pinions and p which, are also connected to
the coupling drums. These pinions o and p serve to transmit the movement to
the vehicle in one or the other direction-according as one or the other pinion
is coupled to its shaft by means of a central wheel q secured to a shaft d, which
also carried at one end another pinion s geared to the toothed rim. or wheel t
secured to the road wheel of the vehicle.
The intermediate pinions o and p, with their shafts c and o, are alternately
coupled by means of a double pivotted lever f worked by a hand lever e and
rod g.
The ends of the double-armed lever f are connected to or act upon
sleeves u and a working on ribs on the intermediate shafts b and c respectively
in such manner, that, as the arms of the double armed lever fare moved in one
or the other direction by means of the hand lever e so one or the other of the
two intermediate pinions o and 2 which, as has been explained before, turn in
opposite directions, becomes released, or coupled to the central driving shaft
whereby the road roller is made to advance or to move backwards as the case
may be.
The brake consists of a double-armed horizontal lever n, provided at each end
with a brake block or shoe and mounted on a shaft d, which passes through a
slot or oblong orifice in the lever for the purpose of allowing a vertical displace-
ment of the double-armed lever n.

page_text: On this double-armed lever is fixed a stirrup, bracket or guide y provided with
a shoulder or downwardly bent part in the middle, against which works a roller
mounted at the end of the branch arm r of the lever f, which arm is suitably
bent for that purpose.
When one or the other of the gear wheels k or is in operation i.e. when
travelling in one or the other direction, the roller of the branch lever will be
located in one of the higher parts of the stirrup y, and consequently the brake
will not be applied..
If now, the driver wishes to stop, he places the operating levere in the median
position, Figures 1 and 2. Both gear wheels, k and 1, are thereby uncoupled,
and the two-armed lever n rises owing to the roller of the lever arm r being
brought under the shoulder or inward bend of the stirrup, whereupon the brake
shoes of the said two-armed lever will be powerfully applied against the peri-
pheries of the two gear wheels k and 1, by which means the vehicle can be
stopped even on the steepest inclines.
Having now particularly described and ascertained the nature of the said
invention as communicated to me by my foreign correspondents, and in what
manner the same is to be performed, I declare that what I claim is :-
1. A traction engine or road roller for roads, driven by a petroleum or other
heavy oil motor, substantially as described.
2. In a traction engine or road roller driven by petroleum or other heavy oil
motor, gearing comprising a double armed lever acting on coupling drums in
such a manner as to cause one or other of two pinions on intermediate driving
shafts rotating in opposite directions to engage with and drive a central pinion
on a shaft from which the road wheels of the vehicle are driven, while the other
pinion for driving in the opposite direction is out of gear, said lever also serving
for the purpose of applying a brake against both coupling drums when both
pinions are out of gear, substantially as described.
3. In a traction engine or road roller a brake device substantially as described
or illustrated in Figures 3 and 4 of the accompanying drawing.
4. The combination and arrangement of parts constituting the complete driving
gear for oil motor traction engines or road rollers, substantially as described or
illustrated in Figures 1 and 2 of the accompanying drawing.
Dated this 3rd day of October 1899.
BOULT & WADE,
Agents for the Applicant.