Different Specific Gravity.
Year: 1887

page_text: Date of Application, 22nd Feb., 1887
Complete Left, 22nd Nov., 1887
Complete Accepted, 30th Dec., 1887
Different Specific Gravity.
I, JOHN GRAY of George Street, Stranraer, in the County of Wigton, Dairy
Implement Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This Invention relates to improvements in centrifugal extracting machines for
separating fluids of different specific gravity and it principally has for its object
improvements in that class of machines employed in extracting or separating the
cream or fatty matter from milk.
The apparatus constituting the Invention consists of a receiver or separator which
is secured to and carried on a vertical spindle the said spindle being stepped at its
lower end into a bearing made in the sole plate of the machine and passing through
a sleeve or guide made in a vertical supporting bracket which is also secured to the
sole plate. The bottom of the receiver or separator is truncated or dished upwards
and at the top of the said dished part a vessel or receptacle is made or secured con-
centric with the spindle into which the milk or other liquid to be treated is conducted
by a supply pipe. From the bottom of the said vessel two, three or other number of
tubes extend down to or nearly to the bottom of the truncated receiver or separator
the milk flowing out into the receiver through apertures in the tubes.
This arrange-
ment has the advantage of not disturbing the cream being separated, thus making
no butter. The receiver is rotated by a belt or band passed round a pulley on the
vertical spindle by which the milk and cream is caused to rise in a divided or separated
condition around the circumference of the receiver until the liquid reaches the upper
part of the receiver where the skimmed milk is drawn off through an orifice or series
of orifices and the cream through another. To provide for this the upper edge of
the receiver has a rim upon it which projects concentrically both inwards and out-
wards and from the inwardly projecting part of the said rim there rises also con-
centrically a short bevelled or inclined sleeve or collar. In the rim between its inner
edge and the side of the sleeve or collar a series of holes is made through which as
the receiver is rotated the cream rises into the collar over whose upper edge it flows

page_text: into a dish or vessel having a downwardly inclined bottom and which is secured
to an outer casing surrounding the receiver or separator. The cream flows away
from the said dish through an exit pipe. At one part the rim around the receiver
is duplicated, that is to say it is composed of two plates with a space between them
an opening being formed between the outer edge of the under plate and the vertical
side of the receiver through which the skimmed milk rises into the space between the
two plates. From the said space the milk flows through an opening made in the rim
at the outer side of the sleeve or collar and it then flows into a vessel secured to the
outer casing below the cream receiving dish and from whence it is similarly con-
ducted.
Into the annular space between the outer casing which is stationary and the inner
rotating receiver or separator a pipe having jets or rose holes is introduced and through
these jets or rose holes a stream of water is made to play on the rotating separator the
effect of which is to cause a better subdivision of the liquid the heavier portions
containing less heat being more finely subdivided from the fatty or lighter portions.
By regulating the stream the milk may be drawn off cold when desired.
Dated this Twenty first day of February 1887
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow,
Agents.

page_text: Different Specific Gravity.
I, JOHN GRAY of George Street, Stranraer, in the County of Wigton, Dairy
Implement 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 improvements in centrifugal extracting machines for
separating fluids of different specific gravity and it principally has for its object
improvements in that class of machines employed in extracting or separating the cream
or fatty matter from milk.
As seen in vertical section at Figure 1, in elevation at Figure 2, and in plan at
Figure 3 of the accompanying drawings, the apparatus constituting the Invention
consists of a receiver A, secured to and carried on a vertical spindle B, stepped at its
lower end into a bearing C made in the sole plate D, of the machine the spindle at its
upper part passing through a long sleeve or bearing E, projecting upwards from the
bottom of the outer casing or vessel F. In conjunction with the said bearing there
is provided a tube x through which oil or other lubricant for the spindle is conducted.
The bottom of the separator A is inclined and at its central part truncated or dished
upwards and at the top of the said dished part another concentric and frusto conical
vessel or receptacle G, is secured on the spindle the said vessel extending downwards
to nearly the bottom of the separator A. The milk to be treated conducted into
the upper part of the vessel G, by a supply pipe H, and it passes into the separator A
through the annular space y at the lower parts of these vessels, which arrangement
has the advantage of not disturbing the cream being separated, thus making no butter.
The separator is rotated at a high speed by a belt or band passed round a pulley I,
secured on the spindle B, and by so rotating the vessel the milk and cream are caused
to rise in a divided or separated condition around its circumference until the liquid
reaches the upper part where the skimmed milk is drawn off through one orifice or
series of orifices and the cream through another. To provide for this the upper edge
of the separator has a rim upon it which projects concentrically both inwards and
outwards and from the inwardly projecting part of the said rim there rises also con-
centrically a short bevelled or inclined sleeve or collar J. Between the inner edge
of the rim and the side of the sleeve or collar there is made at one part a series of
holes u through which the cream rises into the collar over whose upper edge it flows
into a dish or vessel K, having a downwardly inclined bottom, the cream flowing
away from the said dish through an exit pipe L. At one part the rim
as seen at figure 1, that is to say it is composed of two plates with a
them. Into this space the skimmed milk rises through an opening
openings t, formed between the outer edge of the under plate and the
the separator. From the said space the milk flows through openings
is duplicated
space between
or series of
vertical side of
and r into a

page_text: vessel M, from whence it is conducted away through the pipe N. The openings for
the outward passage of the skim milk have or may have a sliding plate or shutter in
conjunction with them and by adjusting the position of the said plate so as to cover a
greater or less area of the opening, the quality and quantity of skim milk passing off
may be regulated.
The vessels K and M, rest upon the outer casing F, and they are made separate so
as to be easily removable for cleaning or other purposes.
As shown by figure 1 there is an annular space between the outer stationary
casing F, and the inner rotating separator A, and into this space a pipe p having jets
or rose holes is introduced and through these jets or rose holes a stream of water is
made to play on the rotating separator the effect of which is to cause a better sub-
division of the liquid the heavier portions containing less heat being more finely sub-
divided from the fatty or lighter portions. By regulating the stream of water the
milk may be drawn off cold when desired.
Having now particularly described and ascertained the nature of iny said Inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. The general arrangement and combination of parts constituting the improved
centrifugal machine for separating fluids of different specific gravity substantially as
herein before described with reference to the drawings annexed.
2. In a machine of the class referred to the combination of the separator A having
an upwardly truncated part at the bottom with the frusto conical and concentric
vessel G, substantially as described with reference to the appended drawings.
3. In a machine of the class referred to the combination of the separator A having
a rim constructed as set forth with the frusto conical sleeve or collar J, substantially
as described with reference.to the accompanying drawings.
Dated this Twenty first day of November 1887.
CRUIKSHANK & FAIRWEATHER,
62, Saint Vincent Street, Glasgow,
Agents.