Improvements in Apparatus for Purifying Engine Lubricating Oil and the like
Year: 1899

page_text: COMPLETE SPECIFICATION.
Improvements in Apparatus for Purifying Engine Lubricating Oil
and the like,
A communication by MAURIZIO NOVARETTI, of 6512, Santa Giustina, Venice, in
the Kingdom of Italy, Marine Engineer.
I, WILLIAM PHILLIPS THOMPSON, F.C.S., M.I.M.E., of the Agency for Foreign
Patent Solicitors, 6, Lord Street, Liverpool, and 6, Bank Street, Manchester,
both in the County of Lancaster, 118, New Street, Birmingham, in the County
of Warwick, and 322, High Holborn, in the County of Middlesex, Civil Engineer,
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 has for its object a purifying apparatus of very simple con-
struction, serving to reimpart to oil which has already been used for lubricating
machinery all the properties which it possessed before being so used, by elimi-
nating water and other impurities which the oil may have absorbed during the
lubrication.
The apparatus which is shown in the accompanying drawings in Figure 1 in
sectional elevation and in Figure 2 in plan view is composed of four compart-
ments A A B C formed by cylinders a b c. The cylinder c is soldered in a
groove in the bottom m; the cylinder b bears on three supports ss1 s, and the
cylinder a is held in a groove formed also in the bottom, by means of a cross-
piece d and nuts h h h h³ on the threaded ends of posts or rods passing through
the bottom. These posts or rods project beneath at in order to fix the parts
in place. The compartments A A¹ are separated from the compartment B by a
filter X placed between hollow perforated annular discs o¹. A rod V screwed
through the centre of the cross piece d and revolving in the centre of another
cross-piece e compresses more or less strongly the filter. The compartment B is
separated from the compartment C by a second filter Y which bears on a hollow
perforated disc u. A coil n n is located in the compartment A whilst a casing z
encloses the apparatus and a lid is placed on it. When the dirty, or used, oil
has been collected it is poured into the compartment A. Steam is then passed
into the coil, until the oil is heated to a temperature of 40° C. and by means of a
tap r, the water and other heterogeneous matters which in consequence of the
heating have become deposited on the bottom of the apparatus are extracted.
In the compartments A A¹ there only remains oil which by reason of the
difference of level with the chamber B is forced to pass through the filter X.
When it has surmounted the edge c¹ it discharges itself into the filter Y and
then passes into the compartment C, from whence it is extracted by means of a
tap p and when it is cooled, it is poured into the lubricating vessels.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed as communicated to
me by my foreign correspondent, I declare that what I claim is :-
1. The improved apparatus for purifying engine lubricating-oil and the like
consisting substantially of three concentric metal cylinders (a b c) of different

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diameters and heights, so arranged together as to form four concentric com-
partments (AA' BC) of which the two first (A A¹) communicate with one another
by means of an opening at the bottom formed by one cylinder (6) resting
three supports (s ss2) whilst the two other compartments (B C) communicate
with one another, and with the two first mentioned compartments (A A¹) by
means of openings or perforated discs (o o¹ and u) provided respectively with
filters (XY).
2. In the purifying apparatus hereinbefore described, the arrangement of a
steam coil (nn) in the compartment A to heat the oil to be purified in order
to cause the water and impurities contained in said oil to be deposited on the
bottom of the compartments A. A¹, and of a tap (r) placed at the bottom of the
compartment A' for extracting the water collected at the bottom of the com-
partments A A¹ and for thus leaving only purified oil in the apparatus sub-
stantially as described.
3. In the purifying apparatus herein before described the arrangement of a cross-
piece () on the cylinders a b, held by nuts (h h¹ h² h³) on respective posts or
rods screwed in the bottom of the compartment A. as a means of connecting the
cylinder a to the bottom of the apparatus and of a rod (V) screwed in the centre
of the cross-piece (d) and which revolves in the centre of a second cross-piece (e)
for compressing the filter X more or less strongly, substantially as described.
4. In the purifying apparatus herein before described, a casing for enclosing
the same, and a corresponding lid, thereon, substantially as described.
Dated this 10th day of June 1899.