Improvements in Ploughs.
Year: 1899

page_text: Date of Application, 12th June, 1899.
Complete Specification Left, 12th Feb., 1900-Accepted, 24th Mar., 1900
PROVISIONAL SPECIFICATION.
Improvements in Ploughs.
I, CARL KOHLERT, of Frankfurter Chaussée, 162/5, Friedrichsberg, near Berlin,
Germany, Engineer, do hereby declare the nature of this invention to be as
follows:-
As is well known the breadth of furrow in ploughing is regulated by adjusting
the draft-bar on which the swingletree is hung, on the front end of the plough-
i.e., by moving it sometimes to the right and sometimes to the left. This adjust-
ment is done partly by hand and partly by a mechanical device. For the purpose
of facilitating the lateral adjustment of the block that is adjustable on the front
part of the plough frame transversely to the longitudinal direction of the latter
and by which the front part of the draft-bar is carried by means of a suspension
rod that can be fixed higher or lower, as required, a rotatable wrought-iron screw-
spindle has been tried of which the block constituted the screw-nut. This device
had, however, the disadvantage that it soon failed owing to the fact that dirt,
stalks, etc., got fixed in the grooves of the screw.
To obviate this defect, in apparatus according to this invention, whilst the
adjustment of the block is effected by means of a screw-spindle, there are sub-
stituted for the female screw in the block, strong rear lugs which engage in the
groove (which is advantageously made of semi-circular cross-section) of the
spindle, and have the effect of sweeping off any dirt that may have lodged on the
screw-spindle, so that the rotation of the spindle is not impeded.
In an example of apparatus according to this invention, the adjusting block is
adjustable on the front part of the plough frame transversely to the longitudinal
direction of the latter. The draft-bar is carried by this adjusting block by means
of a suspension rod, which can be raised or lowered in relation to the block, in
which it is guided and in which it can be fixed in the position to which it is
adjusted by means of a suitable set-screw screwed into the block.
The adjustment of the adjusting block is effected by means of a screw-spindle
which is mounted to rotate in the front part of the frame, whilst a female screw
inside the block is dispensed with. To this end there are arranged on the block
rear lugs which enter the groove, which is of semi-circular cross section, of the
screw-spindle.
The engagement of the block and the screw-spindle by means of lugs is not
liable to be rendered inoperative by dirt, stalks, etc. The lugs have the effect
of sweeping off any dirt that may have lodged on the screw-spindle so that the
rotation of the spindle is not impeded.
The screw-spindle may be a sleeve, which may be made of cast iron and is
fixed on a pin, which is mounted in the frame and carries a handle. The lugs are
made of cast iron and in one piece with the rear portion of the adjusting block,
which is detachable therefrom, so that, in the event of any damage to the inter-
gearing parts, new parts can be substituted therefor.
Dated this 12th day of June 1899.
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.

page_text: Improvements in Ploughs.
I, CARL KOHLERT, of Frankfurter Chaussée, 162/5, Friedrichsberg, near Berlin,
Germany, 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:-
-
As is well known the breadth of furrow in ploughing is regulated by adjusting
the draft-bar on which the swingletree is hung, on the front end of the plough-
i.e., by moving it sometimes to the right and sometimes to the left. This adjust-
ment is done partly by hand and partly by a mechanical device. For the purpose
of facilitating the lateral adjustment of the block that is adjustable on the front
part of the plough frame transversely to the longitudinal direction of the latter
and by which the front part of the draft-bar is carried by means of a suspension
rod that can be fixed higher or lower as required, a rotatable wrought-iron screw-
spindle has been tried of which the block constituted the nut." This device
had, however, the disadvantage that it soon failed owing to the fact that dirt,
stalks, etc., got fixed in the thread of the screw.
To obviate this defect, in apparatus according to this invention, whilst the
adjustment of the block is effected by means of a screw-spindle, there are sub-
stituted for the female screw-thread in the block, strong rear lugs which engage
in the thread (which is advantageously made of semi-circular cross section) of the
spindle and have the effect of sweeping off any dirt that may have lodged or
the screw-spindle, so that the rotation of the spindle is not impeded.
Such a device for adjusting plough draft-bars is shown in the accompanying
drawings in which Fig. 1 is a sectional side elevation and Fig. 2 is a plan of the
same.
The adjusting block a is adjustable on the fore part of the plough frame trans-
versely to the longitudinal direction of the latter. The draft-bar d is carried
by this adjusting block by means of a suspension rode which can be raised or
lowered in relation to the block a in which it is guided and in which it can
be fixed in the position to which it is adjusted by means of a suitable set-screw f
screwed into the block.
The adjustment of the adjusting block a is effected by means of a screw-
spindle b which is mounted in the front part of the frame, whilst a female screw-
thread inside the block a is dispensed with. To this end there are arranged on
the block a rear lugs which enter the thread which is of semi-circular cross-
section, of the screw-spindle b.
The engagement of the block a and the screw-spindle by means of lugs is not
liable to be rendered inoperative by dirt, stalks, etc. The lugs have the effect
of sweeping off any dirt that may have lodged on the screw spindle so that the
rotation of the spindle is not impeded..
In the example shown the screw-spindle is a sleeve, which may be made of
cast iron and is fixed on a spindle g, which is mounted in the frame and carries
a handle h. The lugs are made of cast-iron and in one piece with the rear
portion of the adjusting block, which is detachable therefrom, so that, in the event
of any damage to the intergearing parts, new parts can be substituted therefor.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what
I claim is:
1
1. An adjusting device for a plough draft-har, in which the adjusting block a
carrying the draft-bar d, is provided with lugs that engage in the thread of the
'

page_text: screw-spindle b, and act as a substitute for a nut, so that when the block is adjusted
they sweep off any dirt that may have lodged in the screw-spindle, and obviate the
obstruction of the rotation of the spindle.
2. Plough draft-bar adjusting apparatus constructed, arranged, and operating
as herein before described with reference to and shown in the accompanying
drawings.
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicant.