Improvements in Automatic Weighing, Mixing, and Measuring Machines.
Year: 1896

page_text: Date of Application, 16th Mar., 1896
Complete Specification Left, 15th Dec., 1896-Accepted, 15th Apr., 1897
PROVISIONAL SPECIFICATION.
Improvements in Automatic Weighing, Mixing, and Measuring
Machines.
1, BERNHARD HERMANN UHLIG of Hermsdorf near Oberlungwitz i/S. in
the German Empire do hereby declare the nature of this invention to be as
follows:-
This invention has reference to improved machines for weighing, measuring and
mixing grains or granular substances.
The characteristic feature of these three machines resting on the same principle
and consists in the arrangement of a cylinder A turning on an axle the periphery
of which cylinder is made tight with the lower mouth of the supplying hopper a
so that even when the cylinder is turning, the grains can not escape between the
touching surfaces.
In the measuring machines constructed according to this principle, the turning
cylinder possesses several radial cylindric chambers, which are open at the periphery
of the cylinder and form a certain measure of capacity. When one of the
chambers comes under the mouth of the supplying hopper a it is filled with the
grains of the latter and on further turning the filled chamber discharges into a
second hopper, where the grains leave the machine. The measured quantity of
grains may be calculated from the number of revolutions of the cylinder.
The mixing machine constructed according to this system consists also of a
turning cylinder made tight with the lower inouth of the supplying hopper and
having several (I prefer 5) open cylindrical chambers.
If one wants to mix two sorts of grains or other granular substances, the radial
chambers may be divided in two parts in each of which leads a supplying hopper,
the one charged with the one sort of grains and the other with the second sort.
The volume of the parts of the chambers may be made at will, so as to give the
wanted mixture.
To make the reciprocal volume of the two chambers variable at will, each part
of the chambers possesses a piston F, which may be adjusted by a screw E in a
high or low position, so that the capacity of each part is lessened or increased by
raising or lowering the piston. In this way each proportion of the mixture may
be obtained.
The weighing-machine constructed according to this system consists also of a
turning cylinder, made tight with the lower mouth of the supplying hopper
and having several chambers, open at the periphery of the cylinder. These
chambers are not radial but more slanting. In the hopper is arranged a scale of
balance b, turning on a pivot e and discharging its grains into the chambers of the
cylinder.
Dated 101 M

page_text: COMPLETE SPECIFICATION.
Improvements in Automatic Weighing, Mixing, and Measuring
Machines.
BERNHARD HERRMANN UHLIG, Millwright, of Hermsdorf near Oberlungwitz,
Saxony, 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 a machine by means of which a certain quantity
of grains or other granular substances may be measured either by its volume or by
its weight.
The new process of measuring essentially consists in automatically filling the
cells of. a disk either with a certain quantity or a certain weight of the granular
substances, so that the cells of the disk receive all the same quantity of the granular
substances to be measured and throw it out again. The whole quantity of the
materials passed through the cells is ascertained by the number of revolutions of
the disk and the number of cells.
On the accompanying drawing shows:
Fig. 1 a vertical section through the device, in which the different cells are filled
with the granular substances.
Fig. 2 is a vertical section of the mixing device.
Fig. 3 and 4 vertical sections of a modification of the cell-disk.
Fig. 4 a section on line x-y of Fig. 4.
Fig. 5, 6 7 & 8 vertical sections of a modification of this device, the cells of
which are filled with the respective weighed quantities of the granular substance.
In the cell-disk A, the circumference of which is free on all sides except that
part just being below the filling-hopper a, are arranged cells f of such a number,
that between two cells remains a full part A' (Fig. 3). The walls of the filling
hopper are curved according to the circle of the disk A and made tight with the
latter. The different cells have a cylindrical form and are of a certain capacity.
The front side of the hopper is provided with a scraper m.
The filling of the different cells f of the slowly turning cell-disk takes place in
such a way that the mouth of a cell comes under the filling hopper a until the cell
is filled. The latter moves on and the graius are levelled by the scraper m.
The
cells filled in this way one by one empty into a receiver from where it may be
carried away by a screw or such like (Fig. 1).
The disk A being accessible at all sides the filling may be controlled exactly.
One may also arrange two or more disks on the shaft k, the cells of said disks are
equal or different in their capacity, whereby a mixing device is obtained (Fig. 2).
By modifying some parts of this machine it may also be used for weighing
the grains. For this purpose the different cells of the disk A may be so adjusted
that they receive a certain volume of grains. This device (Fig. 3, 4 and 4^)
consists essentially in a disk F moving up and down by a central screw E. To the
disk F is fastened a projection H moving with said disk and down in a slit of the
cell f, which slit is covered by a band G with a scale. The central screw is held
in its position by means of the screws i.
For the purpose of ascertaining the weight of a quantity of grains by means of
the described device a part of the grains is weighed on an ordinary balance. This
weighed quantity is put into a call (Fig. 3 and 4) and the disk F is adjusted by
turning the screw E in such a way, that the grains touch the brim of the cells.
Now the other cells are adjusted in the same way, so that all projections H
have the same position, whereupon the device may be operated in the described
manner.

page_text: The adjusting of the cells allows also to mix two different granular substances in
a certain proportion.
A very exact weighing may be obtained by the turning cell-disk, if one makes
use of the modifications represented in Fig. 5, 67 and 8.
In the same above the cell-disk A is arranged a weighing device for taking up
the weighed quantity for filling each cell. The frame of the hopper a is closely
fastened to the turning disk A and the material being in the hopper can only
go into the cuplike holes of the disk A under assistance of the vessel K. The
operation is as follows:
If, as shown in Fig. 5, the grains or other material are allowed to go from the
hopper a into the vessel K, this condition has only place as long as the materials
fallen into the vessel K surpass the counterweight 9 whereupon the vessel K
swinging around o is lowered and by means of the arched slide-cuts off the further
supply of grains into the vessel K. However the vessel K is allowed to sink only
as much until its wall 6', lies upon the circumference of the disk A which wall 6' is
curved for the purpose according the radius of the disk A. (Fig. 6.) In the
very moment, as the bottom of the vessel K disappears and a cell comes under
the vessel, the latter discharges (Fig. 7) whereby the grains, the capacity of the
cell being greater than the vessel K, have time enough to get emptied until
finally in consequence of the slow turning motion of the disk A the left side wall of
the cell touches the wall 61 of the vessel K (Fig. 8) and brings the same when
emptied back into the position shewn in Fig. 6, whereupon the force of the lever h
and weight bring the vessel K in its normal position (Fig. 5) and opens the
hopper a for the next filling.
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:
1. In machines for measuring grains by their weight or volume the combination
of a disk A, having several cells f with a hopper a the walls of which are curved
according to the circle of the disc A and made tight with the latter, and a
scraper m, as set forth.
2. In machines for measuring grains the combination of a disk A, having several
cells f, with the disks F moveable in said cells by means of a screw E, as and for
the purpose set forth.
3. In machines for measuring grains by their weight the combination of a disk A
with cells and a hopper a und the discharge opening of which is arranged a
vessel K, swinging around a bolt, and a arched slide for cutting of the supply of
grains into the vessel K, as set forth.
Dated this 12th December 1896