Year: 1891

page_text: Date of Application, 15th Sept., 1891-Accepted, 17th Oct., 1891

page_text: drawing provided they are not quite perpendicular to the axis of the drum to the
end that the cream and the skim milk shall encounter and follow their respective
sides of each hole.
Instead of making the cylinder in three parts as hereinbefore described and
shewn it may if desired be made in two or four parts; or it may be made in one
piece but I find it.more advantageous.to make it.in several parts as it allows of the
holes being more easily cleaned.
In the modified arrangement shewn in Figures 3 and 4 the cylinder is composed
of several sections h (four being shewn in the drawings) forming segments of a
circle which sections are composed of small pieces of a suitable substance having
a multitude of longitudinal holes such, for instance, as cane which has a number of
very straight and even capillary passages. These pieces of cane fare fixed together
so as to form segments of a cylinder by means of a suitable adhesive substance and
such segments are then forced into a frame or between iron bars or standards k the
ends of which are united by means of rings 1, covering the ends of the cylinder.
Between the bars or standards k may also be placed louvres c (Figures 9 and 10)
consisting of a plate a' which on both (or on one) of its sides is provided with
oblique wings or combs projecting from the plate. It is obviously not necessary
for the wings to be placed opposite one another at each side of the plate. They
may be placed alternately as shewn. Also the wings need not, as shewn in the
drawings, project perpendicularly from the plate a' but may be placed at an angle
thereto. In this manner a complete cylinder is formed, as shown in Figures 3
and 4, corresponding to that shewn in Figure 1 and operating in the same way.
The cleaning of this last described cylinder is effected after the separating opera-
tion has been completed preferably by first admitting hot water and then cold water
into the apparatus while rotating so as to wash through the small holes.
In the arrangement shewn in Figures 5, 6, 7 and 8 the cylinder A is provided at
the top with a truncated cone or pyramid B and is composed of a number of the
seginent shaped louvres herein before described and shown in Figures 9 and 10.
The segment shaped louvres C are separated one from another by means of radial
plates D some of which extend inwards towards the centre of the separator-drum
as far as the width of the plate a', while some extend farther inwards so as to form
wings (Figure 8) in order to compel the innermost layers of the liquid under
treatment to partake of the rotary motion of the drum. The plates D are on their
outer edges provided with longitudinal ribs or heads of sheet iron c¹ for the purpose
of preventing the segments C from being thrown from their place in the cylinder
frame. The outer surface of the ribs c¹ is shaped so as to form a ridge along the
middle of the same in order that no particles of cream may be prevented from
passing in towards the centre. The bottom of the cylinder A consists of a plate F,
in the middle of which is a recess or hollow cylinder G containing a spiral spring H
which projects a little below the plate F. The object of this spiral spring is to
keep the cylinder A steady in the centrifugal separator drum when placed and
enclosed therein. At its periphery the plate F carries a ring I which forms a
support for the lower ends of the plates D. An inner ring K serves to hold the
plates in a certain position. The tops of the plates are held together by upper
rings L and M.
The rings I, K, L, M and the plates D and the plate F constitute
the frame of the cylinder and into this frame the segments of louvres C can be
pushed in from above, that is to say, into the spaces between the plates D. In
order to allow of the segments being introduced, grooves are made in the rings I
and L for the plates a' and notches d' and f¹, Figure 9, are cut in the lower end of
the plate in order that it may pass down and fit between the rings I and K.
The sides of the cylinder thus constructed will present a number of holes or
channels which, owing to the position of the combs or wings of the louvres are not
quite perpendicular to the axis of the drum. In place of a cylinder having parallel
sides is shown in the drawings I make it conical when it is to be adapted to centri-
fugal drums of a conical shape.

page_text: 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 :-
(1) In a centrifugal separator for separating liquids of different gravities a hollow
cylinder adapted to be placed in the rotatory drum of the separator the said cylinder
nearly filling the space of the drum in which the separating operation takes place
and having radial holes or passages which are not quite perpendicular to the axis
of the drum substantially as hereinbefore described.
(2) A centrifugal separator of the construction referred to in Claim 1 having the
cylinder composed of several segmental parts which may consist of small pieces
provided with holes or of small pieces so located close to one another as to form
passages or holes between them, which small pieces are held together in a frame or
between bars placed between rings which serve as covers for the ends of the
cylinder substantially as hereinbefore described.
(3) In a centrifugal separator constructed, as referred to in Claim 2, of a hollow
cylinder composed of several parts and adapted to be placed in the rotating drum
of the separator, constructing the said parts of a plate from the side of which
project a number of oblique wings or combs forming louvres the said parts being
inserted like the staves of a cask between the radial plates of a frame consisting of
the said plates and of rings serving to hold the plates together substantially as
hereinbefore described and illustrated in Figures 5, 6, 7, 8, 9 and 10 of the accom-
panying drawings.
(4) The improvements in centrifugal separators hereinbefore described with
reference to the various figures of the accompanying drawings.
Dated the 15th day of September 1891.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.