Improvements in Apparatus for Feeding or Delivering Pulverulent Material.
Year: 1895

page_text: Date of Application, 12th June, 1895-Accepted, 3rd Aug., 1895
COMPLETE SPECIFICATION.
Improvements in Apparatus for Feeding or Delivering Pulverulent
Material.
I, JULIUS MOHS, of Brandenburg on Havel, Prussia, Germany, Engineer,
do hereby declare the nature of this invention and in what mauner the same is
to be performed to be particularly described and ascertained in and by the
following statement :—
As is well known, it is difficult to deliver in regular quantities pulverulent
material containing a certain amount of moisture, as for example is required in the
manufacture of pressed stones or bricks with variously coloured surfaces or designs,
in which case the pulverulent colouring materials are required to be strewed from
different receptacles through a pattern plate into a templet arranged in the pressing
mould, so as to form a surface-design upon the bottom of the mould which is then
filled with other material to form the required stone or brick, and such other
material pressed to shape.
Mere shaking motion of the colour receptacles closed at the bottom by sieves,
is not sufficient if the colouring material therein has a tendency to form into
lumps. In such a case, means must be employed which do not only produce a
positive movement of the colouring material through a pattern plate that serves to
partially close the bottom of the colour receptacles, but which will also at the same
time effect a continuous loosening of the colouring material in the receptacles,
so that the material will continually sink down on its way to the perforations in
the pattern plate.
In the accompanying drawings,
Fig. 1 shows partly in vertical section and partly in elevation, means for
delivering colouring materials in the manner described to a mould for making
bricks.
The mould consists of a bottom plate v² with a border and a loose bottom
plate . A templet S is placed in the mould, and upon the mould there rests a
perforated pattern plate a¹ of the form, for example shown in Fig. 2, which extends
into the cavity of the mould. The mould rests on a table H provided with raised
sides, for insuring the proper position of the mould thereon. Above the mould
is a box m' which is divided into compartments or receptacles the number and
arrangement of which are such as are required by the number of the colours to
be delivered and by the pattern of the particular design to be formed thereby.
are
The pattern plate a is fixed to the box m¹. In each receptacle of the
latter there is arranged a perforated vertical plate e². All the plates e² are con-
nected by means of rods el with a plate c³. To the lower part of the plates
fixed a number of pins a, different forms of construction of which are illustrated
in side and inverted plan views in Figs. 3 to 6 inclusive. These pins are located
in the perforations as of the pattern plate a'. It is much preferable to employ
pins a, of the form shown in Fig. 3, each of which consists of a round shank a and
a lower wedge-shaped extension having toothed lateral sides or edges.
With the construction described, if a vertical shaking motion be imparted to the
plate c3 by suitable means such as by a crank a fixed upon a shaft provided with
eccentrics og from which are suspended connecting ruds c that are connected
with the plate c, the pins a will force colouring material from the aforesaid colour.

page_text: receptacles through the pattern plate a' into the templet in the mould, the amount
of colouring material delivered being determined by the length of stroke used or the
number of strokes made. During this movement the perforations of the plates e²
serve to agitate or break up the mass of colouring material in the receptacles. To
enable the mould to be removed from underneath the delivery apparatus, the latter
may be made to lift up, by arranging the plate c, which carries such apparatus and
which is arranged to rest upon the mould ve² as shown, so as to be capable of being
lifted or turned upward by suitable means, such as by the lever mechanism c¹³
and the cam or eccentric e¹0.
Fig. 7 shews partly in vertical section and partly in elevation, a modified
arrangement which differs from that shown in Fig. 1 only in that the box m¹
is arranged in an clevated position above the mould and the connection between
the several colour compartments or receptacles of such box, or the pattern
plate a at the bottom thereof in which the pins a work, and pattern plate al in the
mould is established by means of flexible rubber tubes a³.
Fig. 8 shows partly in vertical section and partly in elevation, a further modified
arrangement in which the general arrangement of the mould with its templet, the
pattern plate, and the box with colour receptacles, is in general the same as that
shown in Fig. 1, but with the addition in this case, of special means for continually
effecting a more suitable distribution of the material in the colour receptacles.
For this purpose, the receptacles are made higher, and the round rods on whose
lower ends the pins a are formed, are made longer and are encircled, between the
plates and the pattern piate a', by coiled springs at, which bear at the top
against the plates eaud at the bottom against the said pattern plate. If now the
plate be moved up and down by means of the eccentric g, the above described
action of the pins a will take place, that is to say, the said pins will effect
an advance of the material through the pattern plate into the mould, but at the
same time the coiled springs at will he alternately compressed and expanded
in the mass of the material, with the result that the latter will be kept in such
a state that it will continually sink downwards in a finely comminuted or loose
condition.
The action of the springs upon the material completely prevents the mass thereof
in the receptacles from caking together or forming into lumps; and in conjunction
with the action of the pins, ensures a very regular delivery of the colouring
material into the template of the mould. To enable this spring-action to act as far
as possible upon the material throughout the entire height of the colour receptacles,
the vertical perforated plates e² extend only to a moderate depth, whereas on the
contrary, the springs extend nearly to the full beight of the receptacles.
The springs are not rigidly fixed upon the round portions of the pins a, but are
mounted thereon in such a manner as to be capable, when being compressed, of
expanding in all directions. These variously directed movements of the springs
have an action upon the material such that should the material have a tendency to
cake together at any point, the material at such point will be loosened to such an
extent that comminuted material will be continually delivered to the pins in the
perforations of the pattern plate.
As will be obvious apparatus such as hereinbefore described can be constructed
in various forms and be used for feeding or delivering pulverulent material of
different kinds for a variety of purposes.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. Apparatus for feeding or delivering pulverulent material comprising one or
more receptacles provided, or ench provided with one or more rods or pins arranged
to work through a hole or holes in a delivery plate and connected to or provided with
means whereby, on reciprocation of the rod or pin or rods or pins, the pulverulent
anaterial contained within the receptacle or receptacles will be agitated or stirred

page_text: and caused to be delivered through the delivery plate in a regular manner and in a
finely divided condition substantially as herein described.
2. In apparatus of the kind referred to in the preceding claim, the combination
with the rod or pin or with each or some of the rods or pins therein referred to,
of a coiled spring adapted, on reciprocation of the rod or pin, to be alternately
compressed and expanded in the mass of material to be fed or delivered substantially
as hereinbefore described for the purpose specified.
3. Apparatus for feeding or delivering pulverulent material, constructed
arranged and operating substantially as herein before described with reference
respectively to and shown in Fig. 1; in Fig. 7; and in Fig. 8 of the drawings
annexed for the purpose specified.
Dated this 19th day of June 1895
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.