Improvements in Centrifugal Machines for Separating Fluids of Different Densities.
Year: 1895

page_text: Date of Application, 27th Apr., 1895
Complete Specification Left, 12th Dec., 1895-Accepted, 18th Jan.,
1896
PROVISIONAL SPECIFICATION.
Improvements in Centrifugal Machines for Separating Fluids of
Different Densities.
I, JOHN LAIDLAW, of the Firm of Watson Laidlaw & Company, of 98 Dundas
Street, South, in the County of the City of Glasgow, North Britain, Engineers,
do hereby declare the nature of this invention to be as follows:-
:-
This invention relates to improvements in apparatus for separating fluids of
different specific gravities by centrifugal action. It is more particularly applicable
to the separation of cream from milk.
In the Specification of a previous Patent No. 21,744 of 1892, I describe an
apparatus for separating cream from milk consisting of a drum of sufficient strength
to resist the pressure due to centrifugal force, inside of which was a liner containing
chambers in the form of a nest of holes. These holes were described as vertical or
inclined to the vertical. The holes were arranged in planes passing through the
axis.
According to the present invention I propose to use a similar drum and liner,
but I make the holes in the liner horizontal and inclined to the radius. The whole
milk is conveyed by a pipe to the bottom of the drum. By centrifugal force the
cream is separated from the skim milk and is discharged at the top. The skim
milk is also discharged at the top, but further from the centre than the cream.
Dated this 26th day of April 1895.
BOTTOMLEY & LIDDLE,
154 St. Vincent Street, Glasgow, Applicant's Agents.
Improvements in Centrifugal Machines for Separating Fluids of
Different Densities.
I, JOHN LAIDLAW, of the Firm of Watson Laidlaw & Company, of 98 Dundas
Street, South, in the County of the City of Glasgow, North Britain, 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 relates to improvements in apparatus for separating fluids of
different specific gravities by centrifugal action. “It is more particularly applicable
to the separation of cream from milk.
In the Specification of a previous Patent No. 21,744, of 1892, I describe an
apparatus for separating cream from milk consisting of a drum of sufficient strength
to resist the pressure due to centrifugal force, inside of which was a liner containing
chambers in the form of a nest of holes. These holes were described as vertical or
inclined to the vertical. The holes were arranged in plañes passing through the
axis.
According to the present invention I propose to use a similar drum and liner,
but I make the holes in the liner horizontal and inclined to the radius.
The

page_text: whole milk is conveyed by a pipe to the bottom of the drum. By centrifugal
force the cream is separated from the skim milk, and is discharged at the top.
The skim milk is also discharged at the top but further from the centre than
the cream.
In order that my invention may be properly understood and readily carried into
effect I have hereunto appended an explanatory sheet of drawing, in both figures
of which corresponding parts are marked with the same letters of reference.
Figure 1 is a part plan and part horizontal section; and
Figure 2 is a vertical section on the line of a centrifugal drum showing my
improvements.
A A is the drum, which is of sufficient strength to resist the pressure due to
centrifugal force. BB is a liner or annular ring, in which are bored a series of
horizontal holes bb, forming chambers of small cross sectional area, by which the
milk is divided into small quantities. The direction of these holes is inclined to
the radius, as seen more particularly in Figure 1.
Between the outer edge of the liner and the drum an annular space is left into.
which skim milk flows. The whole milk is brought into the drum at the bottom
by means of a central tube, and passes through a series of holes e in a cono Ę to
the separating chambers. Several vanes are provided to carry the liquid
round.
The whole milk passing through the holes e in the cone E is brought to the
separating chamber near the middle of the mass of liquid, so that when the drum is
rapidly rotated the cream and milk begin to separate as soon as the liquid passes
through the holes in the conc. The liquid passes by centrifugal force into the
chamber, and is thus divided into small quantities, which assists the separation of
the cream from the milk. The skim milk passes into the annular space between
the liner and the drum, and then through passages G, and is discharged over the
lip H into the skim milk receptacle. The cream flows in towards centre of the
drum, rises up, and is discharged over the upper lip I.
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 I
claim is:
In a centrifugal separator for separating fluids of different specific gravities, the
combination of a drum with an annular ring divided into small horizontal chambers
in lines inclined to the radius of the drum, substantially as described.
Dated this 31st day of October 1895.
BOTTOMLEY & LIDDLE,
154 St. Vincent Street, Glasgow, Applicant's Agents.