IMPROVE- MENTS IN DISMEMBRATORS FOR FLOUR MILLS, AND FOR THE COMMINUTION OF VARIOUS MATERIALS
Year: 1878

page_text: LETTERS PATENT to Carl Pieper, of 74, Belle-Alliance-Strasse, Berlin, S.W.,
Prussia, Civil Engineer and Patent Agent, for the Invention of "IMPROVE-
MENTS IN DISMEMBRATORS FOR FLOUR MILLS, AND FOR THE COMMINUTION OF
VARIOUS MATERIALS." A communication from August Nagel and Reinhold
Kaemp. of Hamburg, Germany.
Sealed the 8th April 1879, and dated the 12th October 1878.
PROVISIONAL SPECIFICATION left by the said Carl Pieper at the Office of
the Commissioners of Patents on the 12th October 1878.
CARL PIEPER, of 74, Belle-Alliance-Strasse, Berlin, S.W., Prussia, Civil Engineer
and Patent Agent. "IMPROVEMENTS IN DISMEMBRATORS FOR FLOUR MILLS, AND
FOR THE COMMINUTION OF VARIOUS MATERIALS." (A communication from August
Nagel and Reinhold Knemp, of Hamburg, Germany.)
This Invention relates to an improvement in a dismembrating machine for which
I have obtained the Patent, No. 4099, dated the Fifth of November, A.D. 1877.
The improvement consists in placing a rotating disk between two fixed disks, the
former having on both sides pegs or studs which work together with those of the
two other disks. The casing in which these disks are inclosed is or may be made
double and may have a partition wall encircling the rotating disk, so that a double
apparatus is thus formed. This arrangement has the advantage of neutralizing the
effect of the rarefaction of air between the rotating disk and either fixed disk, so
that there is no pressure lengthwise on the shaft of the former.
In the Specification of the Patent, No. 4099, the use of the described dismem-
brating machine was limited to the purpose of separating from each other the
particles of the products obtained by crushing grain on roller mills. Now I wish it
to be understood that the inventors extend the application of the machine to the
comminution of grain, or of grain more or less reduced by millstones or otherwise,
and also to the reduction of other materials sufficiently fragile for being treated by
the machine.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Carl Pieper in the Great Seal Patent Office on the 9th April 1879.
CARL PIEPER, Civil Engineer and Patent Agent, of 74, Belle-Alliance-Strasse,
Berlin, S.W., Prussia. "IMPROVEMENTS IN DISMEMBRATORS FOR FLOUR MILLS,
AND FOR THE COMMINUTION OF VARIOUS MATERIALS." A communication from
August Nagel and Reinhold Kaemp, of Hamburg, Germany.
This Invention relates to an improvement in a dismembrating machine for which
I have obtained the Patent, No. 4099, dated the Fifth of November, A.D. 1877.
The improvement consists in placing a rotating disk between two fixed disks as
represented on the accompanying Sheet of Drawings. The fixed disks d, d, are
provided with concentric rows of studs or pegs on the side opposite to the rotating
disk a, while the latter has pegs on both sides intervening between those of disks
d, d. The rotating diska is encircled by a partition walls, and the casing c is
provided with two feeding apparatuses, so that thereby a double machine is formed.
Each of these feeding apparatuses is similar to the one described in the Specifi-
cation of Patent, No. 4099, A.D. 1877, v, v, being feed rollers, t, t, regulating valves,
and p, p, hoppers. The substances fed in by these apparatuses pass along the
channels w towards the centre of the rotating disk a, and are thence projected
radially outward by the centrifugal action of this disk, so as to be acted upon by
the series of co-operating pegs. The stufting boxes and 2, the tension or
tightening roller k, the bow-shaped bracket 2, and the adjustable ring ¹, also fully
agree with the corresponding parts of the design described in the above-mentioned
Specification.
This arrangement of the machine has the following advantages in comparison
with the dismembrator having but one fixed disk. Firstly, the rarefaction of air
inevitably caused between the rotating disk and the fixed disks, is equal on both
sides of the former, consequently there is no pressure lengthwise on the shaft b.
Secondly, the friction of the shaft b in its bearings being nearly the same as when
there is but one fixed disk, the efficiency of the machine is increased. Thirdly, by
the double apparatus two different materials may be treated without becoming
mixed.
If it should be preferred, however, the machine may be provided with a single-
feeding apparatus only, and in this case the partition wall may be dispensed
with.
The described dismembrating machine is intended to be used for the comminu-
tion of grain, whether in its entire state or whether previously reduced more or less
by millstones, roller mills, or otherwise, and also for the reduction of other materials
sufficiently.brittle and fragile for being treated by the machine.
Although the dismembrator with one fixed disk described in the Specification of
the Patent, No. 4099, A.D. 1877, was the one designed originally by the inventors,
it may be considered with regard to its form, as a modification of the machine
described above, because it is virtually one half of the latter. In the former
Specification, however, the use of the dismembrating machine (with one fixed disk)
as described thore, was limited to the purpose of separating from each other the
particles of the products obtained by crushing grain on roller mills. Now I wish it
to be understood that my correspondents at prosent wish to cover the application of
the said dismembrator with one fixed disk to the comminution of grain in its
entire state, or of grain more or less reduced by millstones or otherwise, and also to
the reduction of other materials sufficiently brittle and fragile for being operated
upon by the machine. But under the title of the present Invention they do not
claim the application of the said machine to the special purpose for which it has
already been claimed in the Specification, No. 4099, A.D. 1877.]
Having thus described the nature and object of the said Invention, and the

page_text: manner in which it is to be carried out in practice, as communicated to me by my
correspondents, I claim as new and important features of the same,—
1. A rotating disk a having concentric rows of studs or pegs on both sides, in
combination with the two disks d, d, fixed in a casing c, and provided with studs
or pegs intervening between those of disk a, the substances to be comminuted being
admitted near the center of the said disks, and projected outward by centrifugal
action of the rotating disk, as specified and for the purposes described.
2. In combination with the closed casing c containing one or two fixed disks ḍ, d,
and a rotating disk a, the tension or tightening pulley revolving in bearings
attached to an adjustable ring ', substantially as and for the purposes specified.
3. In combination with a closed casing c containing one or two fixed disks d, d,
and a rotating disk a, the stuffing boxes h¹ and ², and one or two feeding appa-
ratuses consisting of hopper p, feed roller o, and valve the said parts being
constructed and arranged so as to exclude the air, as described and for the purposes
set forth.
In witness whereof, I, the said Carl Pieper, have hereunto set my hand and
seal, this Twelvth day of March, in the year of our Lord One thousand eight
hundred and seventy-nine.