Year: 1887

page_text: I, EUGENE DUCRETET, of the firm of E. Ducretet et Cie. of Paris, France, do hereby
declare the nature of this invention to be as follows:-
My invention relates to the combination with a gas or petroleum engine of filtering
apparatus whereby the lost heat is utilized for the purpose of purifying the oil used for
lubricating such engines.
As is known the effective. working of gas and petroleum motors necessitates a large
daily consumption of oil for lubricating the parts of these engines and and particularly
the slide valve and piston.
In a short time this mineral oil or animal oil is charged with impurities and a time
arrives when the engine is stopped by what is called "waste" oil which can only be
sold at a very low price.
In order to obviate the loss occasioned by this waste, apply to the engines themselves
filtering apparatus which by utilizing the lost heat enable this oil to be purified at any
moment directly and gratuitously which oil can therefore be used a number of times.
By my invention, I effect not only a great saving, but to also obviate the clagging and
any inconveniences connected with the waste materials.
The lost heat of gas and petroleum motors arises from two distinct sources.
1st. From the gases which escape after having effected their work in the cylinder.
2nd. From the water which has served for cooling the driving cylinder.
These two sources of lost heat can be employed simultaneously or separately at will;
and it is evident that the system of filtering to be applied can be of any kind deemed
suitable, with a simple or a double casing.
In applying my invention to a gas or petroleum engine; the driving cylinder
is provided with a double casing in which the cooling water circulates in a continuous
manner.
Upon the discharge pipe for the gases; and the pipe through which flows the water
that has served for the cooling of the cylinder are mounted the filters hereinafter tormed
the upper and lower filters.

page_text: The hot water which arrives through the water discharge pipe passes into the double
casing of the upper filter and reheats the oil to be purified and contained in the said
filter. This oil passes through filtering material and falls, freed from its impurities,
into a special vessel placed below, a cock in the bottom of the upper filter or into the
lower filter.
"
The upper filter above described could likewise be arranged like the lower filter.
In the said lower filter and vice versa, the oil to be purified surrounds the discharge
pipe. In any case the filtering can be of any kind and can be enclosed or not between
two grates that can be regulated at will or any other device which retains it.
This arrangement representing for the rest only one of the modes which permit my
invention to be caried into practice, I do not limit myself at all thereto, and I reserve the
right to apply to the discharge conduits for the hot gases leaving the cylinders of gas
or petroleum engines, and to those which serve for the outflow of the cooling water
from the cylinder of these machines any arrangement of filter which I deem suitable,
with the object of purifying oils especially waste oils which have been employed
as a lubricant in the engine itself, as well as to give to these filters any desired
dimensions.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicant.

page_text: Oil in Connection with Gas and Petroleum Engines.
I, EUGÈNE DUCRETET, of the firm of E. Ducretet et Cie., of Paris, France 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:-
My invention relates to apparatus for filtering or purifying oil and comprises the
combination, with a gas or petroleum engine of filtering apparatus whereby the
lost heat is utilized for the purpose of purifying the oil used for lubricating such
engines.
As is known the effective working of gas and petroleum motors necessitates a large
daily consumption of oil for lubricating the parts of these engines and particularly the
slide valve and piston.
In a short time this mineral oil or animal oil is charged with impurities, and a time
arrives when the engine is stopped by what is called "waste" oil which can only be sold
at a very low price.
r.
In order to obviate the loss occasioned by this waste, I apply to the engines themselves
filtering apparatus which by utilizing the lost heat enables this oil to be purified at any
moment directly and gratuitously, which oil can therefore be used a number of times.
By my invention, I effect, not only a great saving, but I also obviate the clogging and
any inconveniences connected with the waste materials.
The lost heat of gas and petroleum motors arises from two distinct sources.
1st. From the gases which escape after having effected their work in the
cylinder.
2nd. From the water which has served for cooling the driving cylinder.
These two sources of lost heat can be employed simultaneously or separately at will,
and it is evident that the system of filtering to be applied can be of any kind deemed
suitable, with a single or a double casing.
In the accompanying drawings
Figure 1 is a central section of my improved apparatus as applied to a gas or
petroleum engine.
Figures 2 and 3 show a modification of my improved apparatus.
A is a gas or petroleum. engine; B the driving cylinder provided with a double
casing in which the cooling water circulates in a continuous manner.
Cis the discharge pipe for the gases, and D the pipe through which flows the water
that has served for the cooling of the cylinder. Upon the pipes Cand D are mounted
the filters E E'.
The hot water which arrives through the pipe D passes into the double casing Fot
the upper filter and reheats the oil to be purified and contained in the said filter G.

page_text: '
This oil passes through filtering material H and falls, freed from its impurities, into
a special vessel placed below a cock R in the bottom of the upper filter or into the
lower filter E¹.
The upper filter above described_could likewise be arranged like the lower filter
represented at E' and vice versa. In the said lower filter the oil to be purified surrounds
the pipe C. In any case the filtering material can be of any kind such as felt, sponge,
charcoal and the like and can be enclosed or not between two grates that can be
regulated at will or any other device which would retain it.
Figures 2 and 3 show a specially advantageous_construction of apparatus in which
the oil bath filter is arranged upon the pipe C or D, that is to say, the heating pipe C
or D passes through the receptacle M filled with oil, whereby the heat issuing from C
is transmitted to the oil, and communicated by this medium to the filter G which is
also immersed its entire length in the receptacle-M-and liquifies or clarifies the waste
oil contained therein. A progressive compression of the filtering material by means
of a pressing device provided with thumb screws t, t in combination with grated
filtering discs serves to attain the highest efficiency of the filter.
.
The upper filtering discs are cup-shaped, and filtering material is stretched over
them in a suitable manner. This filter can be easily served and it can, if necessary be
provided with a stirring or agitating device that may be operated either by hand or
from the motor.
The apparatus is provided with suitable discharge cock R¹o Ro.
:
I do not wish to limit myself to the arrangements above described and I reserve the
right to apply to the discharge conduits for the hot gases leaving the cylinders of gas
or petroleum engines, and to those which serve for the outflow of the cooling water
from the cylinder of these machines, any arrangement of filter which I deem suitable,
'with the object of purifying oils especially waste oils which have been employed
as a lubricant in the engine itself, as well as to give to these filters desired
dimensions.
any
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed 1 declare that what
.I claim is―
First The application to gas and petroleum engines, of filtering apparatus enabling
the lost heat from these motors to be utilized with the object of purifying oils in
general and waste oils in particular, reserving the right to apply to the realization of
this invention any desired filtering device, whatever be its nature, its dimensions and
its mode of mounting.
Second-For the above mentioned purpose, the filter represented in Figures 2 and 3,
which is connected with one of the pipes Cor D of the motor in such a manner that
the heat escaping from these pipes is transmitted through the medium of the oil by
which the receptacle M is fitted to the filter constructed in the above described manner
and also entirely immersed in the said receptacle M, for the purpose of liquifying or
clarifying the lubricating oil waste contained in the same.
Dated this 7th day of March 1888.