An Improved Oil Filter.
Year: 1891

page_text: Date of Application, 3rd Feb., 1891
Complete Specification Left, 10th Nov., 1891-Accepted, 12th Dec., 1891
PROVISIONAL SPECIFICATION.
An Improved Oil Filter.
CHARLES EDWARD MASTERMAN and WOODHOUSE & RAWSON UNITED
LIMITED, of 88 Queen Victoria Street London E.C. Electrical Engineers, do
hereby declare the nature of this invention to be as follows:-
-
Our invention is for the construction of a simple type of machine for removing
the impurities from oil and so enabling the latter to be used repeatedly.
We employ in our machine the aspirator principle.
We construct the machine as follows:-
A vessel of metal or other suitable substance, preferably of cylindrical form, is
divided into two chambers by an horizontal division or the separate chambers may
be connected by an airtight joint.
The division is made of some rigid perforated substance such as metal plate or
wire with fine cotton waste upon it through which oil can flow.
Over the cotton waste we lay a disc of perforated metal and again such number
of similar filtering materials and discs as may be found convenient. On the top
of the upper disc we place one or more rings of cast iron, or other heavy
substance, to act as a dead weight and to maintain a proper density of the filtering
material.
We provide the chamber below the partition with two outlet cocks, one at the
bottom and the other as near the top of the lower chamber as convenient.
There is also an inlet pipe provided with an air-tight plug.
The action of the filter is as follows:
The lower outlet cock of the lower chamber being carefully closed and the upper
opened we saturate the filtering material with clean oil and afterwards fill the
top chaniber with dirty oil, we then start filtration by pouring in clean oil at the
upper inlet pipe of the lower chamber until it overflows from the upper outlet
cock we then carefully close the upper inlet and outlet cocks and open the lower
outlet cock whereupon the oil in the lower chamber flows away by its own gravity
and causes a vacuum in the lower chamber the dirty oil is thus forced through
thic filtering partition by atmospheric pressure.
After the action has once commenced it will be continuous as long as the upper
chamber is supplied with oil.
We may combine with this vessel another conveniently attached above and at
the side and connected with the upper chamber by a tube. This second chamber
is intended to act as a water separator and consists of a receptacle suitably shaped
to allow the water to fall to the bottom and be drawn off when desired by means
of a cock placed at the bottom for that purpose.
The tube connecting the water separator with the main vessel being fixed at a
higher level to that to which the water may ever be expected to rise, no water
therefore will find its way into the main filtering chamber into which however the
dirty oil-can freely pass.

page_text: COMPLETE SPECIFICATION.
An Improved Oil Filter.
CHARLES EDWARD MASTERMAN and WOODHOUSE & Rawsox UNITED
LIMITED, of 88 Queen Victoria Street, London, E.C. Electrical 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 :-
Our invention is for the construction of a simple type of machine for removing
the impurities from oil, and so enable the latter to be used repeatedly. We employ
in our machine the aspirator principle.
Having reference to the accompanying drawings the construction of our machine
is as follows:-
A vessel A of metal or other suitable substance, which should be airtight
throughout the greater part of its length, preferably of cylindrical form, is divided
into two chambers B and C by a horizontal division D, or the separate chambers
may be connected by an airtight joint.
The dividing plate is made of some rigid perforated substance such as metal
plate or wire gauze with fine cotton waste F upon it through which oil can flow.
Over the cotton waste we lay a disc of perforated metal and again such number of
similar filtering materials F and discs P as may be found convenient. On the top
of the upper disc we place one or more rings G of cast iron, or other heavy
substance, to act as a dead weight and to maintain a proper density of the filtering
material.
We provide the lower chamber C with two outlet cocks K and J, one at the top
and the other at the bottom as convenient. There is also an inlet pipe L provided
with an airtight plug.
The action of the filter is as follows:-
The lower outlet cock J of the chamber C being carefully closed and the upper
cock K opened, we saturate the filtering material F with clean oil and afterwards
fill the top chamber B with dirty oil, we then start filtration by pouring in clean
oil at the upper inlet pipe L of the lower chamber until it overflows from the
upper outlet cock K: we then carefully close the upper inlet and outlet cocks K
and L, and open the lower outlet cock J, whereupon the oil in the lower chamber C
Hows away by its own gravity, and causes a vacuum in the lower chamber, the
dirty oil in the chamber B is then forced through the filtering material F by
atmospheric pressure.
After the action has once commenced it will be continuous as long as the upper
chamber is supplied with oil. We may combine with this vessel another vessel M
conveniently attached above and at the side and connected with the upper chamber
by a pipe . This second chamber is intended to act as a water separator, and
consists of a receptacle suitably shaped to allow the water to fall to the bottom
and be drawn off when desired, by means of a cock N, placed at the bottom
for the purpose.
The pipe O connecting the water separator with the chamber B being fixed at a
higher level than that to which the water may ever be expected to rise, no water
will find its way into the main filtering chamber, into which however the dirty oil
has ready access.
Having now particularly described our invention, and in what manner the same
may be performed, what we claim, is:
1
I. An apparatus for filtering oil, consisting of a chamber, airtight throughout
the greater part of its height, provided with an outlet cock at its lowest level and
having an inlet cock at about one third of its height above the base, with or
without an overflow cock at approximately the same height as the last named cock,

page_text: and having also above the level of these cocks, one or more perforated plates
suitably supported at their lowest level, and separated from each other by suitable
thicknesses of filtering material, and above the top perforated plate such number of
rings of metal or other heavy material, as may be necessary to produce the proper
pressure upon the filtering material, and above the rings, a chamber to contain the
oil requiring filtration, substantially as described and for the purposes set forth.
II. The combination with such an oil filter as described in Claim I, of an oil
separating chamber attached to the filter and connected with it by a pipe substan-
tially as described and for the purposes set forth.
CHAS. EDWD. MASTERMAN.
WOODHOUSE & RAWSON UNITED, LIMITED.
W. T. Stutchbury, Secretary.