Process for Treating or Preparing the Leather Pistons of Moderator and Carcel Lamps and other Pistons, to Render the same Impervious to the Action of Petroleum and Heavy Oils.
Year: 1888

page_text: Date of Application, 26th June, 1888
Complete Specification Left, 8th Mar., 1889
Complete Specification Accepted, 13th Apr., 1889
Process for Treating or Preparing the Leather Pistons of Moderator
and Carcel Lamps and other Pistons, to Render the same
Impervious to the Action of Petroleum and Heavy Oils.
We, CHARLES DIXON ARIA, of 175 Piccadilly, in the County of Middlesex, Lamp
manufacturer, and OCTAVE CHEMIN, of 12 Avenue de l'Alma, Paris, France,
Engineer, do hereby declare the nature of said Invention to be as follows:-
This invention relates to a process for treating or preparing the leather pistons of
moderator and carcel lamps, to render the same impervious to the action of
petroleum and heavy oils. The invention further relates to a like treatment for the
leather pistons or plungers of pumps and motors which have to act directly upon
petroleum and heavy oils, for the purpose above set forth.
In carrying out the process, we first rid the said leather pistons from all fatty
matters, which they may contain, by immersing them for some time, say for
24 hours, in a bath of one of the known solvents for fatty matters, such for instance
as the bisulphide of carbon, benzine, mineral spirit, or alcohol. After the pistons
are removed from this bath we dry them by any suitable means, but preferably by
allowing them to remain in a well ventilated room. The leather pistons being thus
brought, as it were, into a spongy state, or at least into a state easily penetrable by
liquids in general, we immerse them in a solution (made with an appropriate liquid)
of either gumlac, gutta percha, celluloid or bichromatized gelatine to which glycerine
is added, or of one of the known resinous gums of the copal family specially selected
by reason of their insolubility in petroleum and the heavy oils. The solutions of
these various substances may be employed either alone, or mixed the one with
the other.
In order to operate more quickly we cause these solutions to penetrate the interior
of the leather by a pressure of from 2 to 3 atmospheres.
The leather pistons are then dried to evaporate the solvent.

page_text: We thus obtain a substance on the surface and in the pores of the leather
which renders it impervious to the action of petroleum and the heavy oils. Moreover,
by this treatment, the leather presorves its elasticity.
We thus obviate all the difficulties which are met with, say in the application to
lamps of the moderator and carcel system, and we thereby render such lamps suitable 5
or burning mineral and other heavy oils, which has heretofore been impossible, as
the difficulties arose chiefly from the leather piston or plungers generally employed
being porous, and permitting the oil to exude.
Bad thin Och day of June 1888.
ERNEST DE PASS, Fol. Inst. P.A.,
68, Fleet Street, London,
Agent for the Applicants.

page_text: Process for Treating or Preparing the Leather Pistons of Moderator
and Oarcel Lamps and other Pistons, to Render the same
Impervious to the Action of Petroleum and Heavy Oils.
We, CHARLES DIXON ARIA, of 175 Piccadilly, in the County of Middlesex, Lamp
Manufacturer, and OOTAVE CHEMIN, of 12 Avenue de l'Alma, Paris, France,
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, that is to say :-
This Invention relates to a process for treating or preparing the leather pistons of
moderator and carcel lamps to render them impervious to the action of petroleum and
heavy oils. The process is likewise applicable to the treatment of leather pistons or
plungers of certain motors and pumps which have to act directly upon said oils.
In carrying out the process, we first rid the leather pistons from all fatty matters
which they may contain, by immersing them for some time,-say for 24 hours,―
in a bath of one of the known solvents for fatty inattors, such for instance as
bisulphide of carbon, benzine, mineral spirit, alcohol. After the pistons are removed
from the bath we dry them by any suitable means, but preferably by allowing them
to remain in a well ventilated room. The leather pistons being brought, as it were
into a spongy state, or at least into a state easily penetrable by liquids in general, we
immerse them in a solution (made with an appropriate liquid) of either gumlac,
gutta percha, celluloid, or bichromatized golatino, to which glycerine is added, or of
one of the resinous gums of the copal family, specially selected by reason of their
insolubility in petroleum and heavy oils. The solutions of these various substances
may be employed either alone or inixed one with the other.
In order to operate more quickly we cause these solvents to penetrate the interior
of the leather by a pressure of from 2 to 3 atmospheres.
The leather pistons are then dried to evaporate the solvent.
We thus obtain a substance in which all the fibres of the leather are surrounded by
a material insoluble in petroleum and the heavy oils, which prevents their injury by
theso liquids, and in which all the spaces existing between the fibres are likewise
filled with the same material.
The leather moreover preserves its elasticity while becoming unattackable by
petroleum and the heavy oils.
We thus obviate the difficulties which are met with in the application of leather
pistons or plungers, say to moderator lamps, and we thereby render such lamps
suitable for burning mineral and other heavy oils, which, heretofore, has been almost
impossible, as such difficulties arose chiefly from the leather pistons or plungers
generally employed being porous and permitting the oil to exude."

page_text: Having now described our Invention and in what manner the sume is to be per-
formed, wo claim :
The process for treating or proparing leather pistons for use in moderator and
carcal lamps, pumpa, motors, and generally wherover such pistons are brought directly
in contact with petroleuin or heavy oils, consisting in impregnating the said pistons
(first treated with any known solvent of the fatty matters in the leather thereof, and
driod) with solutions of gumlac, gutta-porcha, celluloid, bichromatized gelatine, to
which glycerine has been added, or any of the resinous gums of the copal family
(insoluble in said oils), substantially as and for the purpose described.