Improvements in Centrifugal Cream Separators.
Year: 1896

page_text: Date of Application, 26th Aug., 1896-Accepted, 17th Oct., 1896
COMPLETE SPECIFICATION.
Improvements in Centrifugal Cream Separators.
1, MAX KOPP, of Walsrode, Hanover, Germany, Manufacturer, do hereby
declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to a machine for separating cream from milk which is
extremely simple in construction and wherein all the parts of the cream separating
drum can be easily taken apart and thereby quickly cleansed. The machine is
furthermore so constructed that all but a very small quantity of the contents can
be removed therefrom when desired.
The invention is illustrated in the accompanying drawing which shows a partly
sectional elevation of the machine.
The cream separating apparatus is mounted on a suitable bench or table, and
consists of an outer case or shell a rigidly secured to the bench or table, and a
revolving drum & mounted inside said case or shell a. Also fixed to the bench or
table is a frame on which, situated above the case or shell a, is placed a milk
reservoir c having an outlet pipe e furnished with a shut off cock or tap d. The
case or shell a and the drum b are each provided with a closing lid.
In the centre of the drum b is a pipe f the lower end of which opens conically
towards, and is fastened to, the bottom of the drum, the upper end protruding:
through the cover or lid of the case or shell a. Into the top of this pipe f
discharges the outlet pipe e from the reservoir c.
The conical part of the pipe serves for the reception of a conical tube g
which is closed at its upper end and provided with a driving pulley h at the lower.
part. The foot of the conical tube g runs in a track i secured on the bench or
table, whilst the closed upper end fits tightly in the conical part of the pipe f
thereby forming a rigid connection between the tube g and the drum b.
The drum b and tube g revolve together over a vertical shaft k which is rigidly,
secured to the bench or talile, and to reduce the friction between the shaft & and
tube g, a ball is placed loose on the top of said shaft. Secured to and surrounding
that part of the pipe which is inside the drum b, is a shell m to which two
wings
o are fastened, said wings reach to the bottom of the drum and nearly to the
side walls thereof. At the sides of the dram are two tubes r situated diametrically
opposite to each other and open at top and bottom, which reach from top to,
bottom of the drum and lie adjacent to the wings o.
The cream is separated in the following manner. The milk in the reservoir e
flows through the open tap d in the outlet e into the pipef and on to the closed
upper end of the conical tube g. It then rises in the pipe f and passes off through,
the small side openings n therein, into the shell m aud from there passes through the
small openings p in the lower end thereof into the interior of the drum b. By the
revolving of the drum the milk is thrown by centrifugal action against the sides
of the drum and dashed against the wings o. When the milk has risen
about two thirds of the height of the drum, the cream separates from the skim
milk, and is drawn towards the centre of the drum whilst the skim milk remaius at
the sides. When the level is sufficiently high the skim milk enters the tubes rund
flows out of the bottom open ends of same on to the inclined bottom a 1 of the
onter case or shell a and finally passes off through the outlet pipe s.
The cream

page_text: thrown against the top of the drum passes off through the opening t in the lid or
cover into the outer case or sholl a and is collected in an inclined annular tray or
shelf u and finally passes off through the outlet pipe v.
In addition to the opening t aforementioned, the lid or cover of the drum b is
furnished with a second opening 1 which is normally held closed by a hinged-
stopper to until the oream separating process is completed; aftor which, in order
to remove the remainder of the contents from the drum, the stopper to must be
removed from the opening 1, when the inrush of air into the interior of the drum
will drive all or practically all of the remaining contents out of the drum. The
removal of the stopper w from the opening 1 can be effected during the
revolution of the drum by pressing on a spring knob y secured on the case a,
the lower end of which knob passes through the case and when pressed down lies
in the path of the hinged stopper w. By the contact of the lower end of the
knob y with the stopper w the latter turns on its hinge and falls over, thus freeing
the opening t 1.
The revolution of the drum b can be effected by hand mechanism, as shown in
the drawing, or by any suitable motive power. The driving mechanism, which can
conveniently bo mounted on the bench or table on which the drum is mounted,
consists of two shafts 1 and 2 connected by mitre wheels 3, and 4. On the shaft 2
are fixed two driving pulleys 5 and 6, of which the former serves as a driver
for a churn, while the latter serves as a driver for the cream separating drum.
By this arrangement it is possible to simultaneously separate cream and churn
butter.
The cream from the outlet pipe can if so desired be led direct from the
separator to the churn by a suitable pipe or conduit, so that the cream from the
separator can be made direct into butter immediately on its exit from the separating
apparatus.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what [
claim is ;-
A machine for separating cream from milk, comprising a revolving separator
drum b mounted inside a fixed caso a, and connected, by means of a central inlet
pipe which is widened conically downwards, with a couical tube g revolving over
a fixed vertical shaft k, a shell m having two wings o and secured to said tube f
side apertures n in said tube through which the milk running from a reservoir c
into tube passes to said shell m and flows off, through apertures in the lower
end, to the drum b against the sides of which and the wings o it is dashed whereby
the cream is separated and passes off through an opening in the cover of the
drum, an inclined tray u and discharge pipe for carrying off the cream, the
skim milk entering two tubes r fastened to the sides of the drum and from thence
falling on to the inclined bottom a 1 of the case a and flowing off through a pipes,
the emptying of the drum after the completion of the separating process being
effected by an opening 1 in the cover of the drum normally closed by means of a
hinged stopper to and opened by a spring push rod y passing through the cover of
the outer case a and striking, when pressed downwards, against the hinged
stopper wall substantially as described and illustrated in the accompanying
drawing.
F. W. GOLBY,
36 Chancery Lane, London, W.C., Patent Agent for the Applicant.