IMPROVEMENTS IN CEN- TRIFUGAL DRESSING OR BOLTING MACHINES
Year: 1879

page_text: LETTERS PATENT to Henry Simon, of No. 7, St. Peter's Square, Manchester,
in the County of Lancaster, for the Invention of " IMPROVEMENTS IN CEN-
TRIFUGAL DRESSING OR BOLTING MACHINES." A communication from abroad
by Heinrich Seck, of Frankfurt on Main, Germany.
Sealed the 26th September 1879, and dated the 19th April 1879.
PROVISIONAL SPECIFICATION left by the said Henry Simon at the Office
of the Commissioners of Patents on the 19th April 1879.
HENRY SIMON, of No. 7, St. Peter's Square, Manchester, in the County of Lan-
caster. "IMPROVEMENTS IN CENTRIFUGAL DRESSING OR BOLTING MACHINES." [A
communication from abroad by Heinrich Seck, of Frankfurt on Main, Germany.]
In centrifugal bolting or dressing machines that are employed for separating the
husks, bran, and groats from meal, and for sorting the meal itself into different
degrees of fineness, it has been customary to effect the separation of the husks, bran,
and coarse particles in a preparatory bolting or sifting machine, in order that such
particles may not act injuriously on the silk bolting or screening cloth used for
sorting the meal.
According to the present Invention the preparatory bolting machine is combined
in one with the fine dressing machine, the two parts being constructed as
follows:-
On the opposite ends of a horizontal shaft are situated two loose sleeves revolving
independently of the shaft and carrying metal discs that are connected together at
their periphery by rods of angle, T, or tubular section parallel with the shaft, so as
to form a skeleton drum along the length of which metal rings are fixed at intervals
to the longitudinal rods. The greater part of the length of this drum constitutes
the fine dressing machine, for which purpose it is separated from the other part by
an intermediate disc, and over this and the one end disc and the rings is stretched
the silk bolting cloth, there being no longitudinal ribs employed for supporting the
latter.
The remaining portion of the drum, constituting the preparatory dressing or
bolting machine, has a cylindrical covering of sheet metal, on the inner surface of
which are formed helical channels for a purpose to be presently described. The

page_text: sleeve or hollow axle carrying the end disc of this part of the machine is of suffi-
ciently large internal diameter to allow of the free passage of the shaft with a helical
or screw blade formed thereon, such screw blade being made to extend to nearly
the end of the preparatory dressing machine, and being surrounded by a tube fixed
to the sleeve.
Into this sleeve the meal to be dressed is introduced through a hopper or spout,
so that the screw blade of the shaft, which revolves at a considerably quicker speed
than the drum, is caused to feed the meal forward in the tube until it drops out of
the open end of the latter into the drum. Here it is caught by a series of revolving
beaters carried by the shaft, which by their centrifugal action drive the finer
particles of the meal through the openings of a cylinder of finely perforated metal
or of wire gauze into the before mentioned helical channels of the outer drum.
These channels are so formed that as the drum rotates they cause the meal to travel
in them towards the disc, separating the preparatory machine from the fine dressing
machine, and at such point each channel terminates in a radial scoop or shoot, by
which the meal is conducted into the interior of the fine dressing machine. At the
same time the coarser particles, such as the husks and the bran, that remain inside
the perforated or wire gauze cylinder, are caused by the beaters to travel towards
the feeding end of the machine, and are there discharged through other radial shoots
or scoops into a fixed spout outside the casing. For this purpose, as also to produce
a more effective action upon the meal, the beaters are constructed of thin metal
blades extending parallel to the central shaft, each blade being divided by transverse
slits into a number of small blades with narrow intervening spaces, each one of which
acts separately upon a small quantity of the meal. Each small blade has furthermore
its one corner bent outwards in such a manner that the bran and husks in being
caught by the blades are impelled thereby in an oblique direction, so as to drive
them towards the feeding end of the machine as stated.
In the fiue dressing compartment of the machine are beaters of the same construc-
tion as above described fixed to radial arms carried by the revolving shaft, so that
as the meal enters the compartiment through the radial shoots or scoops as described
it is caught by the blades and thrown against the silk bolting cylinder, the finer
particles passing through the latter, while the coarse particles being driven by the
oblique blades towards the outer end of the compartment are there caused to pass
into radial shoots which conduct them into an external fixed spout.
The bolting cloth may be formed of different degrees of fineness in the direction
of its length, so that as the meal travels along it will on passing through the cloth
be separated into quantities of corresponding degrees of fineness, which are collected
in separate shoots in the casing surrounding the machine.
The central shaft of the machine is driven by a pulley and strap at one end,
while at the other end it has a pinion gearing with a spur wheel on a countershaft,
which also carries a pinion gearing with a spur wheel on the sleeve or hollow shaft
carrying the screening cylinders, so that these are driven from the central shaft at a
greatly reduced speed.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Henry Simon in the Great Seal Patent Office on the 16th October
1879.
HENRY SIMON, of No. 7, St. Peter's Square, Manchester, in the County of Lan-
caster. "IMPROVEMENTS IN CENTRIFUGAL DRESSING OR BOLTING MACHINES." (A
communication from abroad by Heinrich Seck, of Frankfurt on Main, Germany.)
In centrifugal bolting or dressing machines that are employed for separating the
husks, bran, and groats, sharps or middlings, from meal, and for sorting the meal
itself into different degrees of fineness, it has been customary to effect the separation
of the husks, bran, and coarse particles in a preparatory bolting or sifting machine,
in order that such particles may not act injuriously on the silk bolting or screening
cloth used for sorting the meal.
According to the present Invention the preparatory bolting machine is combined
in one with the fine dressing machine, the two parts being constructed as
follows:-
On the opposite ends of a horizontal shaft are situated two loose sleeves revolving
independently of the shaft, and carrying metal discs that are connected together at
their periphery by rods of angle, T, or tubular section parallel with the shaft, so as
to form a skeleton drum, along the length of which rings are fixed at intervals to
the longitudinal rods. The greater part of the length of this drum constitutes the
fine dressing inachine, for which purposo it is separated from the other part by an
intermediate disc, and over this and the one end disc and the rings is stretched the
silk bolting cloth, or it may be fixed in any known manner.
The remaining portion of the drum, constituting the preparatory dressing or
bolting machine, has a cylindrical covering of sheet metal, on the inner surface of
which are formed helical channels for a purpose to be presently described. The
sleevo or hollow axle carrying the end disc of this part of the machine is of suffi-
ciently large internal diameter to allow of the free passage of the shaft with a helical
or screw blade formed thereon, such screw blade being made to extend to nearly
the end of the preparatory dressing machine, and being surrounded by a tube fixed
to the sleeve.
Into this sleeve the material to be dressed is introduced through a hopper or
spout, so that the screw blade of the shaft, which revolves at a considerably quicker
speed than the drum, is caused to feed the meal forward in the tube until it drops
out of the open end of the latter into the drum. Here it is caught by a series of
revolving beaters carried by the shaft, which by their centrifugal action drive the
finer particles of the meal through the openings of a cylinder of finely perforated
metal or of wire gauze into the before mentioned helical channels of the outer
drum. These channels are so formed that as the drum rotates they cause the meal
to travel in them towards the discs separating the preparatory machine from the
fine dressing machine, and at such point each channel terminates in a radial scoop
or shoot by which the meal is conducted into the interior of the fine dressing
machine. At the same time the coarser particles, such as the husks, bran, and
sharps, that remain inside the perforated or wire gauze cylinder are caused by the
beaters to travel towards the feeding end of the machine, and are there discharged
through other radial shoots or scoops into a fixed spout outside the casing. For
this purpose, as also to produce a more effective action upon the meal, the beaters
are constructed of thin metal blades extending parallel to the central shaft, each
blade being divided by transverse slits into a number of small blades with narrow
intervening spaces, each one of which acts separately upon a small quantity of the
meal. Each small blade has furthermore its one corner bent outwards in such a
manner that the bran and husks in being caught by the blades are impelled thereby

page_text: in an oblique direction, so as to drive them towards the feeding end of the machine
as stated.
In the fine dressing compartment of the machine are beaters of the same con-
struction as above described fixed to radial arms carried by the revolving shaft, so
that as the meal entors the compartment through the radial shoots or scoops, a9
described, it is caught by the blades and thrown against the silk, the finer particles
passing through the latter, while the coarse particles being driven by the oblique
blades towards the outer end of the compartiment, are there caused to pass into
radial shoots which conduct them to an external discharge.
The bolting cloth may be formed of different degrees of fineness in the direction
of its length, so that as the meal travels along it that which passes through the
cloth will be separated into quantities of corresponding degrees of fineness, which
may be collected in separate shoots in the casing surrounding the machine.
The central shaft of the machine is driven by a pulley and strap at one end,
while at the other end it has a pinion gearing with a spur wheel on a countershaft,
which also carries & pinion gearing with a wheel on the sleeve or hollow shaft
carrying the cylinders, so that these are driven from the central shaft at a greatly
radneed sneed
P.
A
Fig. 1 is a longitudinal section, and Figs. 2 and 3 are transverse sections respec-
tively on the lines X, X, and Y, Y, of a combined bolting and dressing machine
according to this Invention. a is the driving pulley fixed on the shaft b, on part
of which is a worm d to carry forward the material fed at c, and deliver it into the
interior of the first compartment of the machine, wherein the beaters A' revolve
within the casing of perforated sheet plate c. The end frames f, g, of the casing
are tied together by four stays g, which form the skeleton of the outer case.
disc i attached to the stays g forms the partition between the two compartments of
the machine. The perforated plate e is fixed at one end to the frame f, and at the
other to an internal frame k; the silk or wire gauze q is stretched over lips pro-
jecting from the end frame gl and the partition i, and over hoops which are
attached to the stays g. Outside the perforated plate e is the plate casing m, on the
interior of which is fixed the four threaded worm n, which by the revolution of the
casing causes the meal that has passed through the perforations of e to travel
towards the four passages o that lead through the partition i into the interior of
the second compartment. In this compartment revolve the beaters B' carried on
frames The husks and coarser matters that cannot pass through the perforations
of the plate e or the pores of the fabric q issue from the ends of the machine by the
The blades of the beaters A¹ and B' are fixed parallel to the axis,
passages 7, 8.
and are made of iron or steel plate notched so as to present a number of small
blades, each of which is bent to a little obliquity at one corner, so that when it
strikes the material it gives it a direction somewhat forwards as well as outwards.
The shaft b which carries the beaters A' and B¹ works in bearings t, t, formed in
brackets attached to the end frames. The casing, which revolves more slowly than
the beaters, has the trunnions of its end frames working in bearings at h, h¹, these
trunnions being tubular, so that the shaft b passes through them. The differential
speed of the beaters and casing is given by gearing at the end of the machine. The
apparatus is enclosed in a chamber in the lower part of which are the shoots u, u¹, u²,
which conduct away the meal or flour of different degrees of fineness, there being a
space where the husks can be received. The machine above described may be
duplicated by arranging at each end a compartment such as is described above for
coarso dressing, these compartments being fed from two sets of stones or rollers.
They may each communicate with a separate fine dressing compartment or may
both communicate with a single such compartment situated between them.

page_text: Having thus described the nature of this Invention, and in what manner the
same is to be performed, as communicated to me by my foreign correspondent, I
claim,―
First. The combination of a bolting and a fine dressing machine in one apparatus,
substantially as herein described.
Second. The construction herein described of beater blades fixed parallel to the
axis and notched and bent at the angles, for the purposes set forth.
Third. The combination of the worm n with the case of the bolting compartment,
as and for the purpose herein set forth.
Fourth. The construction of the combined bolting and dressing machine herein
described with reference to the accompanying Drawings.
In witness whereof, I, the said Henry Simon, have hereunto set my hand
and seal, this Fourteenth day of October, in the year of our Lord One
thousand eight hundred and seventy-nine.
HENDY CAN
11
HENRY SIMON. (L.S.)