Improvements in Apparatus for Filtering Oils and the like.
Year: 1895

page_text: Date of Application, 23rd Mar., 1895-Accepted, 4th May, 1895
COMPLETE SPECIFICATION.
Improvements in Apparatus for Filtering Oils and the like.
We JOHN JAMES TONG and JOSEPH ROBERT WOOD both of 7 Chapel
Walks, Manchester, in the County of Lancaster, Mill Furnishers, 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 that kind of apparatus for filtering oils and the like
which consists of a removable oil vessel provided with filtering sieves, and a
receiving vessel with a conical bottom containing water upon which the oil
collects, and the object of our invention is to improve the construction of such
apparatus.
In order that our invention may be more clearly understood we have annexed
hereto a sheet of drawings illustrative thereof and have marked the same with
figures and letters of reference corresponding with those in the following
description.
Fig. 1 on the annexed drawing is a partial elevation of the apparatus and Fig. 2
is a sectional elevation of the apparatus.
Fig. 3 is a horizontal section through the upper part of the receiving vessel with
the oil vessel removed. a is the receiving vessel, b the removable oil vessel
and c the conical bottom in which the oil collects upon the water shewn at c.
We fix sieves or strainers a¹, a², a³ in the vessel a between the bottom c thereof
and the vessel b in order to still further purify the oil strained in the removable
vessel through the sieves 61, 62, 63; the said sieves a¹ a², a³, being removable
when required for cleaning and other purposes; and instead of providing the
removable vessel with a steam jacket fitting inside the upper part of the
receiving vessel a we provide the outside of the receiving vessel a with a steam
jacket which not only serves to heat the oil passing through the vessel b, but also
to heat the oil as it passes through a sieve a¹ (or sieves) fixed in the vessel a.
An
A further advantage obtained from this construction, is that the steam jacket
being on the outside of the receiving vessel, in case of bursting, the escaping steam
and water cannot reach the oil in the vessels a and b, and spoil the same.
outlet for water of condensation can also be conveniently arranged at the bottom
of the steam jacket x, which was not possible when the jacket was arranged around
the vessel b inside the vessel a.
We make the sieves a', a², a³ preferably decreasing in diameter so that they can
be the more readily removed from the top when required, and each sieve is made
of a dished or concave piece of perforated metal a+ with a flat cross bar or
bars a++ (see Fig. 3), upon which is placed the filtering cloth or fabric a', a², a³,
kept in place by the central pegs a, and clanıping rings as upon the edge of the
fabric. Thus the fabric is held away from the perforated metal and the oil filters
through the fabric more readily and is further broken up by the perforated metal
dish. The sieves a², a³ fit in or upon the annular shelves a
We further improve the filtering properties of the apparatus by forming an
annular depression or channel around the sieve and a similar depression a'
around one or more of the sieves a', a², a³ and providing a bell cover e, el to
guide the oil into these depressions where it accumulates and will deposit any
impurities (capable of settling therein) before passing through the said sieves b³ a¹
respectively.

page_text: The bell e' which is suspended from the bottom of the vessel b also prevents the
oil drops from the raised sieve 6 from falling upon the sieve a', which they would
otherwise do with such force as possibly to drive impurities through the straining
fabric.
ff are a series of air inlets each communicating with one of the compartments
formed by the sieves or strainers a¹, a², a³, so that the oil can flow or pass freely
through them.
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. The improved filter for oils constructed substantially as hereinbefore described
and illustrated by the annexed drawings.
2. An oil filtering apparatus consisting of a removable oil filtering vessel
provided with a series of sieves or strainers and a receiving vessel also provided
with removable sieves or strainers and at the upper part of the said receiving
vessel with an outer steam jacket substantially as hereinbefore described and
illustrated by the annexed drawing.
3. An oil filtering apparatus provided with sieves or strainers formed by a dished
or concave perforated plate with a cross bar or cross bars supporting a sheet or
sheets of filtering fabric, substantially as herein before described and illustrated by
the annexed drawings.
4. An oil filtering apparatus of which two or more of the filtering strainers or
sieves are provided with an annular depression into which the oil is directed by a
bell or cover before passing through the sieve or strainer substantially as herein-
before described and illustrated by the drawings annexed.
Dated this 21st day of March 1895.
GEO. DAVIES & SON.