IMPROVEMENTS IN CENTRIFUGAL EXTRACTING MACHINES
Year: 1881

page_text: LETTERS PATENT to Frederik Wolff, of the International Patent Office,
Copenhagen, Denmark, Patent Agent, for an Invention of "IMPROVEMENTS IN
CENTRIFUGAL EXTRACTING MACHINES." A communication by "Burmeister
& Wains Maskin & Skibsbyggeri," a Joint Stock Company, Incorporated,
of Copenhagen, Denmark.
PROVISIONAL SPECIFICATION left by the said Frederik Wolff at the Office
of the Commissioners of Patents on the 1st July 1881.
FREDERIK WOLFF, of the International Patent Office, Copenhagen, Denmark,
Patent Agent. "IMPROVEMENTS IN CENTRIFUGAL EXTRACTING MACHINES."
[A. communication by "Burmeister & Wains Maskin & Skibsbyggeri," a Joint
Stock Company Incorporated, of Copenhagen, Denmark.]
This Invention has for object improvements in centrifugal extracting machines,
and relates to the construction of the said machines in such manner that the two
liquids which have been separated by the machine can be drawn off quietly and
with certainty, and can be varied as desired during the motion of the machine.
To this end a space or chamber is formed for the heavier part of the fluid between
an annular plate and the cover or upper internal flange of the rotating reservoir,
and from this space or chamber the fluid is removed by a fixed pipe. Around the
inner edge of this annular plate is a collar, or ring, or grooved flange serving to
form separate spaces in the main vessel, from which fluids can be withdrawn during
the motion of the machine without causing a disturbance of the remainder. The
fluid or fluids to be separated or divided is or are introduced into the rotating
reservoir by a pipe which ends near the bottom of the said vessel and delivers its
contents towards the inner wall of the cylinder.
The liquids are drawn off at the top by pipes (of which there are by preference
two), one of which receives or draws off the heavier and the other the lighter
fluid or fluids. By varying and adjusting the positions of the pipes, the quality
of the fluids drawn off by each of them can be altered during the motion of the
machine.

page_text: In one form of machine according to this Invention the rotating reservoir is
provided with an annular plate, around the circumference of which is a narrow
slot or groove inside the walls of the reservoir. Through this slot or groove the
heavier part of the liquid gradually passes into the space or chamber between the
annular plate and the cover or internal flange, and from which space or chamber
the said fluid is drawn off. The drawing off or removing of the fluid is effected
by a tube fastened to the cover of the external box or casing, and bent to reach
into the space between the annular plate and the cover or internal flange of the
reservoir. The fluid is by its speed driven into and through this tube, the main
body of fluid being shielded from movement or disturbance by the annular plate.
The annular plate is provided on its inner circumference with a collar, or ring, or
flange, which along its inner edge is formed with a groove open towards the axis
of the centrifugal machine. By regulation of the feed and the delivery, the level
of the fluid in the reservoir can be kept just inside the inner edge of the collar, or
ring, or flange, and the lightest part of the fluid in the reservoir will therefore be
gathered in the said groove. From this groove the fluid is removed by a second
tube, in the same manner in which the heavier portion is drawn off through
the former tube. The collar prevents the movements in the fluid that is being
drawn off from acting upon or being communicated to the fluid outside the said
groove.
The variation or alteration of the quality of the two liquids separated is effected
during the motion of the machine by the sliding of the two tubes lengthwise. A
slight variation is effected by adjusting the first tube with its mouth farther into
the space or chamber between the annular plate and the cover or external flange of
the reservoir, whilst the mouth of the second tube is adjusted somewhat farther
from the collar, or ring, or flange. The speed with which the fluids enter into the
tubes depends upon the distance of the mouths of the tubes from the axis. To
admit of this adjustment the tubes are each provided with a foot by which they
can be moved between corresponding slides on the casing. Furthermore, there is a
screw thread on each of the tubes surrounded by a nut or internally screwed hand-
wheel, which can be locked in a given position by a set screw.
The fluid enters the reservoir through a tube which terminates at the bottom of
the reservoir near the inner side of the surface of the fluid (which during the
motion of the centrifugal machine forms almost a cylinder), and is provided with
a cock in order to regulate the feeding.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Frederik Wolff on in the Great Seal Patent Office on the
15th December 1881.
FREDERIK WOLFF, of the International Patent Office, Copenhagen, Denmark,
Patent Agent. "IMPROVEMENTS IN CENTRIFUGAL EXTRACTING MACHINES."
(A communication by "Burmeister and Wains Maskin and Skibsbyggeri," a Joint
Stock Company, Incorporated, of Copenhagen, Denmark.)
This Invention has for object improvements in centrifugal extracting machines,
and relates to the construction of the said machines in such manner that the two
liquids which have been separated by the machine can be drawn off quietly and
with certainty, and can be varied as desired during the motion of the machine.
To this end a space or chamber is formed for the heavier part of the fluid between
an annular plate and the cover or upper internal flange of the rotating reservoir,
and from this space or chamber the fluid is removed by a fixed pipe. Around the
inner edge of this annular plate is a collar, or ring, or grooved flange serving to
form separate spaces in the main vessel from which fluids can be withdrawn during
the motion of the machine without causing a disturbance of the remainder. The
fluid or fluids to be separated or divided is or are introduced into the rotating
reservoir by a pipe which ends near the bottom of the said vessel and delivers its
contents towards the inner wall of the cylinder.
The liquids are drawn off at the top by pipes (of which there are by preference
two), one of which receives or draws off the heavier and the other the lighter fluid
or fluids. By varying and adjusting the positions of the pipes the quality of the
fluids drawn off by each of them can be altered during the motion of the
machine.
Referring to the accompanying Sheet of Drawings, Fig. 1 is a vertical section
of a centrifugal extracting machine according to this Invention; Fig. 2 is a plan
of the same; and Fig. 3 is a sectional detail view shewing the means employed to
withdraw the contents of the machine. The rotating reservoir a is provided with
an annular plate e, around the circumference of which is a narrow slot or groove i
inside the walls of the reservoir.
Through this slot or groove the heavier part of the liquid gradually passes as
shown by the arrows into the space or chamber between the annular plate and
the cover or internal flange g, and from which space or chamber the said fluid is
drawn off. The drawing off or removing of the fluid is effected by a tube f¹
(Figs. 1 and 3) fastened to the cover of the external box or casing b, and bent to
reach into the space between the annular plate e and the cover or internal flange g
of the reservoir. The fluid is by its speed driven into and through this
tube, the main body of fluid being shielded from movement or disturbance by
the annular plate e. The annular plate is provided on its inner circumference
with a collar, or ring, or flange, which along its inner circumference is formed with
a groovej open towards the axis of the centrifugal machine. By regulation of
the feed and the delivery, the level or surface of the fluid in the reservoir can be
kept just inside the inner edge of the collar, or ring, or flange, and the lighter part
of the fluid in the reservoir will therefore be gathered in the said groove. From
this groove the fluid is removed by a second tube f" (Figs. 2 and 3) in the same
manner in which the heavier portion is drawn off through the former tube f¹.
The collar prevents the movements of the fluid that is being drawn off from
acting upon or being communicated to the fluid outside the said groove.
The variation or alteration of the quality of the two liquids separated is effected
during the motion of the machine by sliding the two tubes f¹ and f lengthwise.

page_text: A slight variation is effected by adjusting the first tube f with its mouth farther
into the space or chamber between the annular plate e and the cover or external
flange g of the reservoir, whilst the mouth of the second tube is adjusted somewhat
farther from the collar, or ring, or flange. The speed with which the fluids enter
into the tubes depends upon the distance of the mouths of the tubes from the
axis. To admit of this adjustment the tubes are each provided with a foot / by
which they can be moved between corresponding slides on the casing. Furthermore,
there is a screw thread on each of the tubes surrounded by a nut and internally
screwed handwheel t which can be locked in a given position by the set screw v.
The fluid enters the reservoir through the tube l, which terminates at the bottom
of the reservoir near the inner side of the surface of the fluid in the machine
(which during the motion of the centrifugal machine forms almost a cylinder), and
is provided with a cock and an index and scale in order to regulate the feeding;
p is the axis; o, the driving pulley; h, the reservoir for the liquid to be divided or
separated; and b, the external casing of the machine.
Having thus described the nature of the said Invention and the manner in
which it is to be performed, as communicated to me as aforesaid, I would have it
understood that what is considered to be novel and original, and is therefore
claimed as secured to me under the Letters Patent herein before in part recited is,
1. In a centrifugal extracting machine, providing between an annular plate or
partition and the cover of the rotary vessel of the machine an annular space or
chamber so arranged that the heavier portion of the fluid treated may enter the
same from the rotating vessel, and can thence be removed by a fixed pipe or pipes,
substantially as described.
2. In a centrifugal extracting machine, the use in combination with an annular
space or chamber, such as referred to in the preceding claim, of a collar, ring, or
flange with a groove or annular channel, the arrangement being such that the two
portions of the liquid can be drawn off, the one from the annular space or chamber,
the other from the annular groove or channel, without causing disturbance to the
main body of liquid in the rotating vessel of the machine, substantially as
described.
3. In a centrifugal extracting machine of the kind above described, feeding the
fluid that is to be operated upon into the rotating vessel, at or near its bottom,
and near the inner cylindrical side of the rotating body of fluid for the time being
in the vessel, and withdrawing the divided or separated fluids near the upper part
of the rotating vessel, substantially as described."
4. In a centrifugal extracting machine of the kind above described, the
application and use for removing the divided or separated fluids of two or more
adjustable tubes, so arranged that different qualities of fluid may be removed by
altering the adjustment of the tubes, substantially as described and shewn.
5. The improved centrifugal extracting machine for separating or dividing fluids,
constructed, arranged, and operating substantially as shewn in and described with
reference to the Drawings.
In witness whereof, I, the said Frederik Wolff, have hereunto set my hand'
and seal, this Tenth day of December, in the year of our Lord One thousand
eight hundred and eighty one.
FREDERIK WOLFF. (L.S.)