Improvements in Seed-drills.
Year: 1888

page_text: Date of Application, 8th Sept., 1888
Complete Specification Left, 11th June, 1889-Accepted, 13th July, 1889
.
PROVISIONAL SPECIFICATION.
Improvements in Seed-drills.
We, AUGUST LINS and CARL LINS, both of 30, Kaiserin Augusta-Allee, Martini-
kenfelde near Berlin, in the Empire of Germany, Manufacturers, do hereby declare
the nature of this invention to be as follows :-
--
This invention relates to seed-drills of that kind in which a pressure roller is
employed made from or covered with a soft or elastic material and working in com-
bination with another roller having peripheral grooves or with a seed-box having
grooves in its bottom, the said rollers or roller being operated from the travelling
wheels of the drill so that they convey the seeds uninjured to the funnels and spouts
through which they fall onto the land.
The improvements comprise an arrangement of screw-threaded. spindles or eccentrics
for altering the distance of the pressure roller from the grooved roller or the seed
box. The pressure roller spindles are advantageously operated through a worm and
worm wheel whereby the soft covering of the pressure roller is caused to enter the
grooves of the other roller or of the seed-box to a greater or less extent and so
regulate the outlet to suit the size of the seeds.
The improvements also comprise an arrangement for shifting the seed-box together
with the grooved roller when lifting the drillshare for the purpose of placing the
toothed driving wheel on the travelling wheel out of gear and to allow the gear
wheels to be instantaneously changed.
For this purpose we make the seed-box moveable and connect it by means of a link
to a conveniently placed crank pin operated through suitable mechanism by a hand
lever so as to shift the said box backwards and forwards.
Dala
7000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Seed Drills.
We, AUGUST LINS and CARL LINS, both of 30 Kaiserin Augusta-Allee, Martini-
kenfelde near Berlin, in the Empire of Germany, Manufacturers, 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 seed drills of that kind in which a pressure roller is
employed made from or covered with a soft or elastic material and working in com-
bination with another roller having circumferential grooves or with a seed-box
having grooves in its bottom, the said rollers or roller being operated from the
travelling wheels of the drill so that they convey tho seeds uninjured to the funnels
and spouts through which they fall onto the land.
The improvements comprise an arrangement of screw-threaded spindles or eccentrics
for altering the distance of the pressure roller from the grooved roller or the seed-box.
The pressure roller spindles are advantageously operated through a worm and worm
wheel whereby the soft covering of the pressure roller is caused to enter the grooves
of the other roller or of the seed-box to a greater or less extent and so regulate the
outlet to suit the size of the seeds.
The improvements also comprise an arrangement for shifting the seed-box together
with the grooved roller when lifting the drill share for the purpose of placing the
toothed driving wheel or the travelling wheel out of gear and to allow the gear wheels
to be instantaneously changed.

page_text: For this purpose we make the seed-box moveable and connect it by means of a
link to a conveniently placed crank pin operated through suitable mechanism by a
hand lever so as to shift the said box backwards and forwards.
In order to enable our invention to be fully understood we will describe how it can
be carried into practice by reference to the accompanying drawing, in which
Figure 1 is a vertical sectional elvevation of a seed drill constructed according to
our invention and having screw threaded spindles for adjusting the position of the
pressure roller.
Figures 2 and 3 are sectional and plan views respectively of parts of the seed
drill.
Figure 4 is a section illustrating the arrangement of eccentrics for adjusting the
position of the pressure roller.
Similar letters in all the figures indicate similar parts.
Referring to Figures 1, 2 and 3, A represents the seed-box from which the seeds
pass through the circumferential grooves in the roller B on to the pressure rollers C
covered with soft or olastic material which enters the grooves of the roller B and
thereby gripes the seeds and conducts them uninjured from the seed box A to the
seed tubes D. Instead of employed a grooved roller, the grooves may be made in a
board connected to the bottom of the seed-box.
E is the screw threaded spindle which we employ for adjusting the pressure
rollers to suit seeds of different sizes, the screw-threaded spindle E for that purpose
pressing against the bearings of the pressure roller spindle H; a worm wheel Fis
fixed upon the screw threaded spindle E and is rotated by the worm G. When the
worm G is rotated the spindle E advances or moved backwards in a stationary nut J
fixed in the casting K, by which movement the bearings of the roller spindle H are
moved and the pressure rollers C brought nearer to or farther away from the grooved
roller B. In this manner the roller B can be easily and accurately set to suit any
kind of seed.
For altering the speed of the grooved roller a Hooke's step gear wheel M is fixed
to the travelling wheel L and gears into a change wheel N. As the distance between
the axletree and the grooved roller B must always be the same, a separate change
wheel N is employed for each set of teeth on the wheel M. In order to easily change
the wheels the following arrangement is provided which allows of moving the whole
hopper or seed-box back and putting the wheels M and N out of gear :-The shaft O
is adapted to be revolved by means of a toothed wheel P gearing with a toothed
sector connected to a lever S whereby chains X wound around the shaft O are
caused to raise the drill shares Y. T is the crank pin on the shaft O, operating the
link U, the other end of which is attached by the pin or bolt V to the slide W of the
seed-box. By rotating the shaft O as before described, the crank pin Tand connecting
rod U move the slide W with the seed box and the roller B backwards and when
thus moved into its extreme position the lever S can be fixed and the wheel N be
changed.
Instead of employing screw spindles and worm and worm wheels as hereinbefore
described and illustrated in Figures 1, 2 and 3, the pressure rollers can be adjusted
by means of eccentrics Z as illustrated in Figure 4.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:
1. In a seed drill in which elastic or spring pressure rollers are employed for
gripping the seeds, adjusting the said rollers in relation to the grooved roller to suit
different kinds of seed either by means of screw threaded spindles working in fixed
nuts and operated through the medium of worms and worm wheels on a single spindle
or by means of eccentrics keyed on the said spindle, substantially as hereinbetore
described with reference to the accompanying drawing.
2. In seed drills in which adjustable pressure rollers are employed the arrangement
for shifting the seed box or hopper when lifting the drill-share the said arrangement

page_text: comprising a crank pin on the lifting shaft, actuating a link which by means of a
pin actuates the slide of the seed box or hopper substantially as hereinbefore described
with reference to the accompanying drawing.
Dated the 11th dor of Iun 1980
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.