Improvements in and relating to Vehicles and more especially to Traction Engines, Road Rollers, and similar Vehicles.
Year: 1898

page_text: Improvements in and relating to Vehicles and more especially to
Traction Engines, Road Rollers, and similar Vehicles.
I, WATSON FOGGO, of Anna Valley, Andover, in the County of Hampshire,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to means for mounting the body or boilers of traction
engines, road rollers, and other vehicles upon the wheels which carry them in
such a manner that strains are not induced on the passage of the vehicle over
uneven surfaces, while the driving gear is in no way affected notwithstanding the
relative motion of the rear driving wheels and frame. The invention is more
particularly applicable to traction engines, road rollers and similar vehicles and
to means for mounting the boilers and boiler frames of such vehicles upon the
rear driving wheels; though capable of general application to other vehicles.
The invention consists in the suspension of the rear end of the boiler or
boiler frame in such vehicles from a bearing collar mounted centrally upon the
rear wheel axle by the interposition of compensating levers upon each side of
the frame, which levers are secured to the respective ends of the bearing collar
by means of suspension links while the inner extremities of the compensating
levers are caused to engage one with the other by means of a pin and slot or
other joint, such compensating levers acting against a spring or springs, and
carrying the weight of the frame at their outer extremities.
The invention further consists in means for communicating motion to the rear
driving wheels or to the equation box, (through which motion is conveyed to the
rear driving wheels), which means are constituted by a gear wheel rotating in
a bearing provided in the frame of the boiler, an intermediate driving ring, and
the outer gear wheel of the equation box mounted upon the driving axle; the
gear wheel being connected to the intermediate ring and the intermediate ring
being connected to the outer gear wheel upon the equation box by means of two
or more tangential links so that relative vertical motion of the shaft and frame is
permitted while the driving effort is allowed to be continuously exercised in
any relative position of the gear wheel and equation box.
The invention further consists in features of construction hereafter described as
applied.
In carrying the invention into effect in its application to a steam road roller or
traction engine I provide the driving axle with a bearing collar which is
preferably built up of two bushes, one on either side of the centre of the shaft
and connected together by means of two or four longitudinal plates so as thereby
to form an integral bearing collar reaching from side to side. This bearing collar
may however be constructed of one casting and at each end of the collar lugs are
provided either integral with the bearing collar or secured thereto, and from such
lugs suspension links depend by means of which the weight of the rear end of

page_text: the boiler and frame is taken. These suspension links carry at their lower
extremities compensating levers which are preferably disposed parallel to the axis
of the driving axle so that their inner extremities may be connected by such means
as a pin and slot joint so as thereby to move together. The outer arms or
extremities of these compensating levers receive the boiler frame brackets being
provided on the frame which rest upon the extremities of these levers. The
inner connected extremities of the compensating levers act against a spiral spring
interposed between them and the bearing collar. It will be understood that upon
either of the wheels passing into a rut or depression in the road the driving axle.
would assume a position oblique to the horizontal which would be maintained by
the boiler frame. Ordinarily the consequences of this would be that strains would
be induced in the boiler frame, but, owing to the suspension of the rear end of
the frame in the manner hereinbefore described, the frame would not be drawn
from its horizontal position and no strain would be induced.
I do not confine myself to the disposition of the compensating levers parallel
to the driving axle as these may, with certain modifications, be provided in a
transverse position.
Upon each side of the rear end of the boiler bearings are secured and within one
of these a gear wheel is provided which is embraced by the bearing, the latter
being formed in halves so that such gear wheel may be conveniently retained in
position by the provision of an outwardly turned end flange. The central hole or
aperture of this gear wheel is made sufficiently large for the driving axle and also
the bearing collar previously described to have the required vertical play. The
equation box is mounted upon the extremity of the driving axle between one of
the road wheels and the gear wheel before referred to and motion is conveyed to the
outer gear wheel of the equation box by a compensating arrangement whereby the
vertical motion of the shaft is permitted while the driving effort is capable of
being continuously maintained. This compensating arrangement consists in the
interposition of a driving ring between the gear wheel which rotates
within the bearing bracket upon the frame and the outer gear
wheel of the equation box and the connection of the driving ring
with such gear wheels by means of tangential links by means of
which the driving effort is communicated in the compression or tension of such
links, the arrangement being such that the vertical play of the driving axle is
always permitted. The driving ring may be interposed with its faces parallel to
the lateral faces of the gear wheels between which it is disposed or it may be
provided as a rim arranged around the outer gear wheel of the equation box
and suspended from the exterior flange of the gear wheel and connected to the
exterior gear wheel of the equation box by means of links as hereinbefore
described. By such a compensating arrangement the second motion shaft from
which motion is derived may be fixedly mounted and all the wheels in the train
will be continuously in gear notwithstanding the vertical play of the rear road
wheels-on passage over uneven roads. Instead of arranging the intermediate com-
pensating driving ring as connected to the respective gear wheels between which
it is mounted by means of links it may be connected with each of the gear wheels
between which it is mounted by a radial nose and slot arrangement permitting
of radial displacement, the radial slots being for example four in number, two
upon one gear wheel and two upon the other while projections are preferably
arranged upon the central compensating driving ring and the projections and
corresponding slots are diametrically opposed.
1000
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street Birmingham, Agents.

page_text: Improvements in and relating to Vehicles and more especially to
Traction Engines, Road Rollers, and similar Vehicles.
I, WATSON FOGGO, of Anna Valley, Andover, Hants, 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 to means for mounting the body frame or boiler of
traction engines, road rollers, motor cars and other vehicles upon the wheels which
carry them in such a manner that unequal strains are not induced on the passage
of the vehicle over rough or uneven surfaces, while the driving gear is in no way
affected.
The invention is more particularly applicable to traction engines, road rollers,
motor cars and similar vehicles, though capable of general application to other
uses.
The invention consists in the suspension of the rear end of the body frame or
boiler in such vehicles from a bearing collar mounted upon the rear wheel axle
by the interposition of compensating levers upon each side of the frame, which
levers are secured to the respective ends of the bearing collar by means of suspension
links, while the inner extremities of the compensating levers are caused to engage
one with the other so as to positively move together, such compensating levers
acting against a spring or springs and carrying the body frame or boiler at their
outer extremities.
The invention further consists in means for communicating motion to the driving
axle so that the relative vertical motion of the axle and frame is freely permitted
while the gear wheels are maintained in gear and the driving effort is continuously
exercised in any position of the axle. Such means consist of an intermediate
driving ring which is interposed between two associated gear wheels to which it is
respectively connected by tangential links.
The invention is illustrated in the accompanying drawings, in which,
Figure 1 is a vertical cross section through the driving axle of a traction
engine, while,
Figure 2 is a plan of the compensating levers employed.
Figure 3 is a modified arrangement of my bearing.
Figure 4 is a part side elevation corresponding to Figure 1, and,
Figures 5 and 6 are respectively part sectional elevations upon the lines O P
and KS (Figure 4).
In carrying the invention into effect in its application to a steam road roller
or traction engine, as illustrated in the accompanying drawings, I provide a
driving axle A with a bearing collar 13 which may be formed from one casting
and at each end thereof lugs bb are provided either integral therewith or secured
thereto and from such lugs suspension links J depend by means of which the
weight of the rear end of the body frame or boiler is taken. These suspension
links carry at their lower extremities compensating levers M M which are prefer-
ably disposed parallel to the axis of the driving axle A so that their inner
extremities may lie together side by side within a box Z cast or forged in one with
an adjusting screw K. This adjusting screw K has a nut L screwed upon it for
the reception of a spiral spring N whose opposite extremity abuts against the
bearing collar B in a suitable recess or bed therein provided for the purpose.
The outer arms or extremities of these compensating levers M receive the body
frame or boiler and brackets m are secured upon the frame which rest upon the

page_text: extremities of these levers. The inner connected extremities of the compensating
levers M act against the spiral spring N interposed between them and the bearing
collar B. It will be understood that upon either of the wheels passing into a
rut or depression in the road the driving axle would assume a position oblique to
the horizontal and this position would be also taken by the body frame or boiler.
Ordinarily the consequence of this would be that unequal strains would be induced
in the boiler frame, but, owing to the suspension of the rear end of the frame in
the manner herein before described, no unequal strains would be set up.
I do not confine myself to the disposition of the compensating levers parallel
to the driving axle as these may with certain modifications be provided in a
transverse position.
A gear wheel Q is mounted upon a bearing m¹ which is secured to the boiler
frame and is provided integral with the bracket part m. This bearing m¹ has
an interior diameter sufficient to permit of the axle A and bearing collar B having
the utmost vertical play. Instead of mounting the gear wheel Q upon the
bearing m¹, as illustrated in Figure 1, is may be mounted within it, as illustrated
in Figure 3, and a collar may be provided upon the inwardly projecting extremity
of the boss of the gear wheel so that it may be conveniently retained in position.
An equation gear 1) is mounted upon the axle and connected with the driving road
wheel U and the motion is conveyed to the outer gear wheel of the equation gear
by a compensating arrangement whereby the vertical motion of the axle is
permitted and is not communicated to the gear mounted upon the frame; while
the driving effort is capable of being continuously maintained. This compensat-
ing arrangement consists of a driving ring C which is mounted between the
ring D of the equation box and the gear wheel Q, such driving ring being
connected to the respective gear wheels by means of tangential links F F two of
which have one of their extremities pivotally secured to the gear wheel Q and two
likewise to the ring D, all of the links having their opposite extremities pivotally
secured upon the intermediate driving ring C, as illustrated in Figure 4. The
tangential links F are preferably formed with circular bosses at their extremities
and are preferably connected to the gear wheels and driving ring, as illustrated in
Figures 5 and 6. The bosses which surround the circular extremities of the
tangential links are slightly cut away to permit of their necessary movement.
I do not confine myself to such means of mounting and connecting the tangential
links.
The driving ring may be provided as a rim arranged round the outer ring of
the equation box and be suspended from the exterior flange of the gear wheel (2
and connected to the exterior ring of the equation box by means of links as herein-
before described.
Instead of arranging such a compensating arrangement as applied to the driving
axle such may with the same advantage be applied to the second motion shaft,
in which case, for example, the spur wheel G (Figure 1) could be placed next to
the boiler frame and run loose on a sleeve and the pinion G¹ keyed to the shaft B',
the driving ring and tangential links being disposed and connected between such
spur wheels G and G₁ and the axle A may be connected to the counter shaft B¹
by means of links such as H H or other suitable method.
By such a compensating arrangement the second motion shaft from which
motion is derived may be fixe mounted and all the wheels in train will be
continuously in gear notwithstanding the vertical play of the rear road wheels
on passage over rough and uneven roads.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
1. In vehicles, such as traction engines, road rollers and motor cars, means
for the suspension of the body frame or boiler, consisting of suspension links 5
depending from the axle, compensating levers carried by such suspension links,

page_text: the outer extremities of the compensating levers carrying the body frame or
boiler, while their inner extremities are connected and act to compress a spring
or springs, substantially as and for the purpose herein before described.
2. Means for communicating rotary motion, more especially applicable to
traction engines, road rollers, motor cars and other vehicles, consisting of a free
ring connected to the gear wheels or members subject to relative movement by
links in the manner and for the purpose substantially as described.
3. Means for communicating rotary motion, more especially applicable to
traction engines, road rollers, motor cars and other vehicles, constructed and
operating for the purpose and in the manner herein before described and as
illustrated in the accompanying drawings.
1000
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and 25, Cross Street, Manchester,
Agents.