IMPROVEMENTS IN MACHINERY OR APPARATUS FOR CRUSHING, SIFTING, AND STRAINING SUGAR, FLOUR, AND OTHER SUBSTANCES OR MATERIALS
Year: 1881

page_text: LETTERS PATENT to Paul Pfleiderer, of 37, Farringdon Street, in the City of
London, Engineer, for an Invention of "IMPROVEMENTS IN MACHINERY OR
APPARATUS FOR CRUSHING, SIFTING, AND STRAINING SUGAR, FLOUR, AND
OTHER SUBSTANCES OR MATERIALS." A communication from abroad by
C. Meinecke, of Zerbst, in the Empire of Germany, Engineer.
PROVISIONAL SPECIFICATION left by the said Paul Pfleiderer at the Office
of the Commissioners of Patents on the 22nd January 1881.
PAUL PFLEIDERER, of 37, Farringdon Street, in the City of London, Engineer.
"IMPROVEMENTS IN MACHINERY OR APPARATUS FOR CRUSHING, SIFTING, AND
STRAINING SUGAR, FLOUR, AND OTHER SUBSTANCES OR MATERIALS." (A com-
munication from abroad by C. Meinecke, of Zerbst, in the Empire of Germany,
Engineer.)
This Invention consists in the combination of a spiral or conveyer brush or
crusher, with a trough consisting entirely or partly of a semicircular sieve or sifter,
in which the said conveyer brush fixed on or around a bowl or cylinder is caused
to revolve, and thereby to act continuously on the material supplied to the trough
while conveying it along the same.
The bowl or cylinder with the conveyer brush or crusher on its outer surface is
mounted in bearings so as to be adjustable in order that the brush or crusher may
be caused to act with the particular degree of pressure against the internal surface
of the sieve or sifter required for the substance or material to be operated upon,
and for suitably clearing the meshes or interstices of the sieve or sifter. The brush
or crusher is a spiral or screw formed either of bristles or of wires or their substitutes,
which are fixed into and project from the outer surface of a bowl or cylinder of
comparatively large diameter, and the said spiral or screw is of such a pitch as to
enable it to act as a conveyor by rapidly moving the material fed on to it in the
direction of the revolving axis. The sieve or sifter may be made of wire, perforated
metal, or other convenient material.
By the above described arrangement of the parts all the material is kept in
constant action and rubbed against the internal surface of the sieve or sifter
through which the finer parts are caused to pass, and the coarser parts are carried
towards one end of the trough whence they are discharged at a suitable outlet'
thereby making the machine self cleansing.

page_text: Having regard to the varieties of substances and materials to be operated upon,
it is important to give facilities for changing both the conveyer brush or crusher A
and the sieve or sifter C. In order to change the conveyer brush or crusher A, it
is to be observed that when the hopper B is removed from the box or receptacle D,
and the sieve or sifter C also taken off therefrom, the conveyer brush or crusher
can be removed by unscrewing the iron plate or shield or segment H (see Fig. 4),
when the small piece I can be taken out and a slot formed for the axis of the
conveyer brush or crusher A to pass through. As soon as the conveyer brush or
crusher A clears the end of the hopper B it can be drawn out and cleaned or
replaced by another. In order to this end the iron bearing must either have a
larger hole to make a loose fit with the axle pin, or it may also be unscrewed and
inclined at right angles to the axle.
The sieve or sifter C, shewn detached in Fig. 5, forms part of a cylinder of wire
gauze, or perforated sheet metal, or other convenient material, mounted on a rigid
frame for support, and fitted to the machine so as to form a trough in which the
conveyer brush or crusher A. is caused to operate upon the substance or material
fed into the hopper B. The outside frame of the sieve or sifter fits on or into the
stand or box or receptacle D, while on each side of the hopper the frame of the
sieve or sifter C is held by spring clips K, K, so as to press the said frame down
firmly on the box or receptacle D (or on a stand of the machine), thereby at the
same time holding and fixing the sieve or sifter C in position, some soft material as
felt or cloth or rubber being used as a packing in order to keep tight the joints
between the parts thus connected. This felt or other packing should be fastened
to one of the parts so as not to hinder the ready removal of the parts and exchange
of sieves or sifters. L is an inclined board to direct the substance or material on
to the conveyer brush or crusher A, the coarser matters passing out of the machine
through an aperture into the spout M, while the finer parts of the substance or
material are caused to pass through the sieve or sifter C into the box or receptacle D,
whence they are discharged through the aperture N, when the slide O is drawn
aside, as shewn in Fig. 3.
From the foregoing description it will be evident that both the conveyer brush
or crusher and the sieve or sifter can be readily changed and adjusted as required,
and that different kinds of substances or materials can be crushed, sifted, and
strained by the combined action of those parts by merely adapting them to the
material required to be treated.
Having thus described the nature of the said Invention, and in what manner the
same is to be performed, communicated to me from abroad as aforesaid, I hereby
declare that what I claim as of the said Invention is,―
First. The combination of a revolving spiral or conveyer brush or crusher with
a fixed or stationary sieve or sifter, in a machine adapted for sifting, straining, and
crushing different substances or materials, as herein before described..
And, Secondly. The combination and arrangement of parts so as to make or
constitute a simple and cheap apparatus for sifting, straining, and crushing
substances or materials, in which apparatus both the revolving spiral or conveyer
brush or crusher, and also the fixed or stationary sieve or sifter can be readily
changed and adjusted, as hereinbefore described.
In witness whereof, I, the said Paul Pfleiderer, have hereunto set my hand
and seal, the Twenty first day of July, in the year of our Lord One
thousand eight hundred and eighty one.
PAUL PFLEIDERER. (L.S.)