COMPLIE Improvements in or applicable to Cream-separators and other Centrifugal Apparatus.
Year: 1891

page_text: The decision of the Comptroller-General, of the 5th day of December 1892,
allowed, under Section 18 of the Patents, &c. Act, 1883, an Amendment of
this Specification.
Date of Application, 3rd Mar., 1891-Accepted, 4th Apr., 1891
COMPLIE
Improvements in or applicable to Cream-separators and other
Centrifugal Apparatus.
We, OSCAR WALFRID HULT, of 325, Atlantic Avenue, Brooklyn, New York,
n the United States of America, and CARL ALRIK HULT, of Carlavagen 14,
Stockholm, in the Kingdom of Sweden, Engineers, 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 chiefly relates to cream-separators and comprises improvements
in the driving gear by means of which the separator drum is driven; and in the
separator drum itself. and in an automatic-lubricator for the sepurator-shaft.
In the accompanying drawing
Figure 1 is a vertical section of a separator constructed according to our inven-
tion; and,
Figure 2 a plan of the driving gear.
The driving gear is located in the foot of the separator stand and consists of three
friction pulleys A, placed symmetrically and with the same inclination (about 45°,)
around the axis of the separator shaft B. These pulleys support the separator
shaft upon them by means of a friction pulley C, as distinctly shewn by the drawing,
the pulleys serving thus as bearings for the shaft at the same time as, by their
rotatory motion, they rotate the shaft. The shafts D of the pulleys A are at the
top provided with small friction pulleys E, resting upon a track F consisting of a
bevelled flange on the casing G, and at the bottom are turned off conically, so
In order to prevent
as to be able to roll upon the lower track H on the bottom I.
the shafts D from being displaced longitudinally the pulleys E are each provided
with a flange K bearing against the edge of the track F, and a shoulder L is
arranged below the track H, against which shoulder the shafts D rest at their
lower ends.
Further through the centre of the bottom I passes an upright shaft M from which
three bifurcated or double arms N project, the said double arms being provided with
bearings in which pins at the tops and bottoms of the shafts D run, the three
shafts D being in this way held in their proper relative positions. When the
shaft M is rotated the shafts D run upon the tracks F and H and in this way
the pulleys A and the separator shaft resting upon them are caused to rotate.
The shaft M has formed upon it left and right hand screw-threads and is provided
with a nut O, which latter has two pins held by the fork-shaped end of a lever P.
By means of the lever, the nut can be alternately moved up and down along the
shaft M, whereby the latter will be caused to rotate rapidly. In lieu of the screw
gear and the lever P common toothed or belt gearing may be employed in order
to drive the shaft M.
The separator drum A' is of a conical shape and has the point directed downwards.
The lower end of the drum closes tightly against the disc B' on the shaft B, which
108

page_text: disc is slightly flanged at its periphery and provided with holes C inside the flange.
At the top the drum is provided with a lid D' screwed in and provided with a
tolerably wide central opening in which the bowl shaped central lid F' upon the
shaft is fitted, the said lid being retained by a nut F. By screwing down the
nut F on the shaft B, the lid F is tightened against the lid D' and the drum A
against the disc B' so that the drum and the shaft become firmly connected. The milk
to be treated is conducted into the drum by means of the pipe G', which pipe is at
its lower end bent upwards, so that the milk comes inside the flanged edge of the
disc B', the milk then immediately mounting into the rotating centrifugal drum.
The outlet for the skim milk consists of a tube H' located under the lid D¹ and
opening towards the centre into a recess in the lid F. From this recess [' the
skim milk passes over the lid D' out into the receptacle K fitting upon the top of
the stand and shaped to correspond with the drum A. The receptacle K is
provided with an outlet pipe L' passing through the wall of the stand and the wall
of the recedtacle is extended up along the shaft a short distance, as shewn at K²,
so as to receive the milk contained in the separator drum when the separator is
stopped. The outlet for the cream is the hole M' passing through the lid F.
The separated cream is collected in the vessel or compartment N' consisting of a
bottom and an upright flange surrounding this bottom. In the centre of the
bottom there is a hole for the lid F1, the top edge of which projects slightly over
the bottom of the compartment N¹. The said compartment is provided with the
outlet pipe O and is covered by the lid P, constituting at the same time the lid of
the stand and the support for the bearing Q. By turning the lid F¹, so that the
pipe H communicates more or less with the recess I' in the lid F', the outlet for
the skim milk and consequently the separation can be regulated, inasmuch as the
more the pipe is closed, the more milk will follow in lieu of cream, so that the latter
will be obtained in greater quantity but with less fat and vice versa.
Figure 3 is a section drawn to a larger scale than Figures 1 and 2 through
the top corner of the stand to show how the vessels K₁ and N₁ are placed one
within the other.
The We find it advantageous to employ an automatic lubricating appliance which
consists of the bowl-shaped top of the bearing Q which, in the usual way, is.
supported by an elastic ring R'. The oil passing down through the bearing is
collected in the lid F¹ which is provided with a gutter-shaped groove S', into which
'the oil enters in consequence of the rotation of the lid. Into the gutter S¹ is
inserted the lower end of a pipe T¹ for conducting the surplus oil back into the
bearing, as represented on the drawing. This pipe T is fixed in the lid Pi and is
thus stationary. No claim, however, is made to this automatic lubricating appliance.
Although we have described our improvements applied in a single machine it is
to be understood that our improved driving mechanism may be used in connection
with any form of centrifugal apparatus and that any other form of mechanism. than
that described may be employed for imparting motion to our improved drum.
1.'
Having now particularly described and 'ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. Driving gear for cream-separators and other centrifugal apparatus, consisting.
of three friction pulleys having the same inclination with relation one to another
and disposed symmetrically, the said pulleys supporting the separator shaft by
means of a small friction pulley, of two conical tracks, one for the tops of the shafts
of the friction pulleys, also tops provided with friction pulleys at their upper ends
and one for the lower ends of the same shafts which. are turned conically, the last.
named track being provided with an upright rib or flange against which the ends of
the shafts rest, and of arms receiving the ends or end pins of the said shafts and
projecting from a common central shaft which is adapted to be rotated substantially
a's described.
2. In a separator the revolving drum of which consists of a conical casing, the

page_text: smaller end of which is directed downwards and is fitted to a disc on the separator
shaft, a central opening in the top lid of the drum containing a bowl-shaped lid
fitted onto the separator shaft and retained there by a nut applied on the shaft,
substantially as described.
3. The combination with the apparatus referred to in the preceding claiming
clause of a disc, the outer edge of which is flanged and which, inside the flange, is
provided with holes through which the milk, conducted beneath the said disc
by means of a bent pipe, passes up into the revolving drum, substantially as
described.
4. In apparatus of the kind referred to in the second claiming clause, the
arrangement of a recess in the outer side of the bowl-shaped lid, and of an outlet
pipe communicating with the said recess in such a manner that the skim milk
passes out of the drum through the recess and the pipe being discharged into a
receptacle surrounding the drum, and that the escape of the skim milk may be
regulated by turning the said lid so that the said pipe communicates with the
recess to a greater or smaller extent, substantially as described.
6. In separators und centrifugal apparatas in general, an automatic labricating
appliance for the shaft, consisting of an annular receptacle for the oil on the shaft
below the bearing and of a pipe by means of which the oil is reconducted from the
receptacle up to the bearing, substantially as described.
6.5. The manufacture and use of the improved cream-separator hereinbefore
described and illustrated in the accompanying drawing.
7 1
C
1 1001
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.