Improvement in Wheel Ploughs.
Year: 1890

page_text: COMPLETE SPECIFICATION.
[Communicated from abroad by MORITZ MOSER, of Chausee Strasse No. 2, Berlin,
in the German Empire, Manufacturer.]
Improvement in Wheel Ploughs.
I, CARL BOLLÉ, of 119, Plymouth Grove, Manchester in the County of Lancaster,
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 wheel ploughs and consists in an improved arrangement
or combination of parts by means of which the plough share can be raised and lowered
or set to the depth of the furrow by moving a single handle.
On the two sheets of drawings appended hereunto, figs. 1, 4 and 5 show the
improved plough in side view, top view, and section through its axle in the position
used for transport.
Fig. 2, a side view of the same after removal of the transport roller with the bottom
of the two wheels and share in a horizontal plane.
Fig. 3, a side view of the same adjusted for ploughing the greatest depth of
furrow.
The bent axletrees a and g of the land and furrow wheels a¹ and g¹ turn on a
common centre in the plough frame n, on which the handle or setting lever c connected
to the axletrec a of the land wheel a' by a curved bar also turns. The curved
link d is attached to the axletree a by the same pin b¹ as the bar and has fixed in its
other end a pin c which rests in and is guided by a slot in a plate rivetted to the
plough frame. The axletrec g of the furrow wheel g' is fixed to an axle or shaft h by
a clip i, one part of being square and the other round. The latter passes through
the hollow axle a² of the land wheel a'. A lever is fixed upon the opposite end of
the shaft and connected at its outer end by a link to the guided pin c and thereby
to the link d. The handle c is mounted upon the hollow axle a² and fitted with a
trigger and catch by means of which it is held in notches of the sector m.
In the position shewn by figs. 1, 4 and 5, the handle c is horizontal while the
axletrees a and g are vertical and the centre lines of the wheels a¹ and g¹ coincide.
In letting down the plough into the position shewn by fig. 2, the handle c is moved
upwards on the sector m and the axle tree a and wheel a¹ are moved backwards by the
barb connected to the handle c and axletree a. The link d connected to the latter
follows this movement and draws the pin e to the back of the slot in plate f, whereby
the link connected to the lever k pushes the latter backwards and turns the shaft h
so that the axle tree g and wheel g¹ are brought forward. The length of the slot is so
adjusted that the pine is tightly held against the end of the slot when the plough has
reached the position shewn in fig. 2. The furrow wheel g¹ therefore is held perfectly
secure and a very quiet and uniform driving of the plough is obtained thereby.
When the handle c is moved further from the position shown on fig. 2 to that
shown on fig. 3, the point 6' at which the bar b is connected to the axletree a describes
an arc shewn in dotted lines on fig. 3 round the centre of the axle a² with the distance
of said point from the centre as radius. The slot f¹ is so placed that the pin e when
at the end of the slot lies in the radial centre line of the arc described by . The
eye of the link d, if unattached by the pin b¹ to the axle tree, would describe an arc
round the pin e as the centre and with the rectilinear length of the link das radius.
This arc would have the same centreline and terminal points as the arc described
by 61, and the difference of the versed sines of the two arcs is so small, that the curved
link d can spring or stretch sufficiently when attached by the pin to the axletree a
that this attachment and the fixed position of the pin e do not impede the movement
of the axle tree by means of the lever c.

page_text: The height of the land wheel a' above the furrow wheel g₁ shewn on fig. 3 equals
the greatest depth of furrow the plough can produce, and the plough can be set or
fixed for this or any less depth by dropping the catch on the handle c into a notch of
the sector m, without having to adjust the furrow wheel separately by screws or other
means as is the case with the ploughs hitherto made.
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
Firstly. In two-wheeled ploughs an arrangement for setting and lifting the plough
share by, means of a single lever actuating the axletrees of the wheels substantially, as
hereinbefore described.
Secondly. In two-wheeled ploughs the arrangement of bent axletrees for the wheels
moveable round a common centre and a handle moveable on a quadrant and connected
to said axletrees in such a manner that the movement of said handle causes the axle-
trees to swing outwards in opposite directions for part of its movement and the land
wheel only for the remainder of its movement, substantially as hereinbefore
described.
Thirdly. In two-wheeled ploughs the arrangement of a furrow wheel axle tree (gh)
and a land wheel axletree (a a²) and a handle (c) on a common centre in the plough
frame, the handle being rigidly connected to the land wheel axletree and the latter by
links (d and ) to a lever (k) fixed upon the furrow wheelshaft (4) in such a manner
that the movement of the handle causes the wheel axles to swing outwards in opposité
directions until the pin (e) connecting said links (d and 2) and sliding in a slot (f)
of a plate (f) fixed to the ploughframe reaches the end of said slot and that a further
movement of the handle produces a further swinging of the land wheel only, substan-
tially as, hereinbefore described and illustrated by the drawings.
Dated this 18th day of April 1890.
W. T. EMMOTT,
Agent for the Applicant.