Improvements in the Construction of Driving Wheels for Harvesting Machines.
Year: 1890

page_text: Date of Application, 29th May, 1890
Complete Specification Left, 12th Feb., 1891-Accepted, 14th Mar., 1891
Improvements in the Construction of Driving Wheels for Harvesting
Machines.
I, EDWARD HAMMOND BENTALL, of Heybridge, near Maldon, in the County of
Essex, Agricultural Engineer, do hereby declare the nature of this invention to be
as follows
The object of this invention is to enable the driving wheels of reaping, and
kindred machines, to maintain a firm hold of the ground over which they are
drawn, and thereby transmit the requisite motion to the reaping mechanism.
Hitherto it has been the practice to obtain a good bite of the ground by casting
the driving wheels with transverse ribs projecting from the periphery of the wheels.
It has, however, been found that in the spaces between the ribs, dirt rapidly
accumulates, and solidifies to such an extent, that a tendency is given to the wheels
to slip, and thereby put the mechanism out of action.
To avoid this; now propose to cast, on the rim of the wheel, transverse bars,
which stand out from the rim like the ribs of the ordinary driving wheel, but which,
projecting laterally from the rim, will stand clear of the rim for the greater part of
their length, and thus provide for the free discharge of any dirt, which they may
take up, and remove all tendency for the wheel to slip as it travels over the
field.
These transverse bars, instead of being cast with a central rim, may be connected
at their ends to a pair of rims, which will thus form together a kind of cylindrical
grid. The rim or rims I connect to the boss of the wheel by wrought iron spokes
set in place in the mould, and secured in position by the molten metal, which is to
form the boss and rim or rims, contracting on to the ends of the spokes; or the
spokes may be secured by casting to the boss only, or to the rim or rims only, and
secured in place by rivetting to the other portion of the wheel.
Or I may, in casting, connect the boss and rim with arms of the same metal, in
which case the whole wheel will be one casting.
Di 150
1000
NEWTON & SON,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in the Construction of Driving Wheels for Harvesting
Machines:
1, EDWARD HAMMOND BENTALL, of Heybridge, near Maldon, in the County of
Essex, Agricultural 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 :-
The object of this invention is to enable the driving wheels of reaping and
kindred machines, to maintain a firm hold of the ground over which they are drawn,
and thereby transmit the requisite motion to the reaping mechanism.
Hitherto, it has been the practice to obtain a good bite of the ground by casting
the driving wheels with transverse ribs projecting from the periphery of the wheels.
It has, however, been found that in the spaces between the ribs, dirt rapidly
accumulates and solidifies, to such an extent that a tendency is given to the wheels
to slip, and thereby put the mechanism out of action.
To avoid this, I now propose to cast, on the rims of the wheels, transverse bars,
which stand out from the rims, like the ribs of the ordinary driving wheel, but

page_text: which, projecting laterally from the rims, will stand clear thereof for the greater
part of their length, and thus provide for the free discharge of any dirt which they
may take up, and remove all tendency for the wheel to slip, as it travels over the
field.
In the accompanying drawing,
Fig. 1 shows in partial side elevation, and
Fig. 2 in edge view, a driving wheel for harvesters constructed according to my
invention.
a is the rim of the wheel, cast with transverse ribs b, projecting laterally from
both sides thereof, and also radially, as shown best in the cross section Fig. 3.
cc are wrought iron spokes, which are connected together by casting onto their
inner ends, the boss d. These spokes are connected to the outer side of the rim a
by rivetting, which completes the construction of the wheel.
In Figs. 2 and 3, it will be seen that the solid portion of the periphery of the
wheel, is about one fifth of the whole breath; consequently there is comparatively
little opportunity offered for the periphery to clog, and the tendency of the wheel
to slip will be completely avoided.
It will be obvious that these transverse bars, instead of being cast with a central
rim, may be connected, at their ends, to a pair of rims, which will thus form
together a kind of cylindrical grid.
This arrangement is shown in the partial side elevation at Fig. 4, and in the
edge view Fig. 5, where a a are the two rims cast with, and connected together by
radially projecting ribs b. In this example, it will be seen that the rims are con-
nected to the boss d of the wheel, not as before described, but by the casting
operation, wrought iron spokes cc being set in place in the mould, and the molten
metal which is to form the boss and rims being relied upon to secure the parts in
position, by the cast metal contracting on the ends of the spokes.
In some cases I may prefer to make the whole wheel of one casting.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
The manufacture of driving wheels of harvesting machines with transversely
ribbed peripheries having openings between the ribs for the discharge of dirt and
other matters which they may take up while in use, as and for the purpose above
described.
.וו.:11
1---
Wa1901
Dated this 11th day
ד
ebruary
1901
NEWTON & SON,
Agents for the Applicant.