Improvements in Acid Proof Electrical Non-conducting Articles and Composition therefor.
Year: 1896

page_text: Date of Application, 20th Aug., 1896
Complete Specification Left, 24th May, 1897-Accepted, 17th July, 1897
PROVISIONAL SPECIFICATION.
Improvements in Acid Proof Electrical Non-conducting Articles and
Composition therefor.
I, WILLIAM MORISON of Montclair, State of New Jersey in the United States of
America, Broker, do hereby declare the nature of this invention to be as follows:-
The object of my invention is to provide a new non-conducting acid proof and acid
tight battery case, and to that end my invention consists in treating certain materials
under heat, as hereinafter set forth, and in then subjecting the same to pressure in
nolds, and thereby molding certain electric connectings and the like into my said
shell or case.
To carry my invention into effect, and to make my cases or boxes, which I utilize
for batteries for bicycle and miners' lamps, and which may be adapted for similar
work of every description, I make a charge suitable for the purpose, as follows:-
I put in a pan say 14 parts of Cuban, Egyptian, Trinidad or other asphaltum of a
certain grade; or say 8 to 10 parts of asphaltum and 5 to 6 parts of pitch, such as
glauce or Venezuelan, or other pitch of similar grade all of which will stand an acid
test, which I make in this way: reference being had to the making of 16 to
20 ounces of the material.
I boil such pitch or asphaltun until I bave it in plastic form so that it can bo
molded, and subject the same to an acid test and use for making my boxes, the
material that best resists the action of the acid. I then put the material selected in
a pan or other receptacle, and place the same over a gas jet or other caloric until I
melt the material so that it appears like molasses. I now add thereto a very small
quantity of gutta percha and subject the same to a lower degree of heat. By boiling
my composition, I drive away all foroign matter, which escapes in the form of sinoke
and gas, and I thereby make the material more dense, The gutta percha makes the
same more elastic and tenacious. After the parts are thoroughly mixed, I put in
gradually as much fibre asbestos as the compound will absorb, and gradually heat and
work the same until it gets somewhat stiffer than putty. I then spread the material
out in the same hot pan (or on a separate hot plate if made in large quantities) and
add a small quantity of sulphur (as a table spoonful spread over it). This is worked
in with care so as not to burn the material. The addition of the sulphur makes the
composition spongy, and drives out the remaining foreign material and gives tenacity
to the inass. When this has been worked until the swelling ceases (say for 5 or 10
minutes), it is then pounded, (as with a large hammer or paver's ram) until not any
of the whole mass will stick to iron. When the gas is all out of the material, and
the stuff is well mixed together, the material is ready. The above operations are all
done under a moderate degree of heat (say not less than 150° F.).
After being prepared, the composition is put into a mold hot, and it can
immediately (say in fifteen seconds) be taken out and the resultant box comes out
hard and smooth and has a polished surface, and does not require seasoning or any
further treatment. Certain kinds of asphaltum and pitch can be worked with
asbestos, and sulphur without the aid of the gutta percha and consequently that part

page_text: of the process can in some cases be eliminated without in any way affecting the
article as an acid proof electrical non-conducting material. As it is evident that
many changes in the operations described might be resorted to without departing
from the spirit and scope of my invention, I would have it understood that I do not
restrict myself to the particular operations as described, but that I reserve the right 5
to make such changes.
211
1000
Improvements in Acid Proof Electrical Non-conducting Articles and
Composition therefor.
I WILLIAM MORISON of Montclair, New Jersey in the United States of America,
Broker 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 :-
The object of my invention is to provide a new non-conducting acid-proof and acid-
tight composition for battery cases and the like; and to that end my invention
consists in treating certain materials under heat, as hereinafter set forth, and in then
subjecting the same to a kneading or pounding treatment preparatory to forming the
article desired by subjecting the saine to pressure in molds.
To carry my invention into effect aud to make my cases or boxes, which I utilize
for batteries for bicycle and miners' lamps, and which invention may be adapted for
insulating articles or similar or other suitable work of every description, I make a
charge suitable for the purpose, as follows: I put in a pan say fourteen ounces of
Cuban, Egyptian, Trinidad, or other asphaltum, or say eight to ten ounces of
asphaltum and five to six ounces of pitch, such as glance or Venezuelan or other pitch
of similar grade, which I make in this way, reference being had to the making of
sixteen to eighteen ounces of the composition. I put the material in a pan or other
receptacle and place the same over a gas-jet or other caloric until I melt the material
so that it appears like inolasses. I now ordinarily add thereto a very small quantity
of gutta-percha and subject the same to a lower degree of heat. By boiling. my
composition I drive away foreign matter, which escapes in the form of smoke and
gas, and I thereby make the material more denso. The gutta-percha makes the same
more elastic and tenacious. After the parts are thoroughly mixed I put in gradually
asbestos, ordinarily intimately mixing in as much fibre asbestos as the compound will
absorb, and gradually heat and work the same until it gets somewhat stiffer than
putty. I then spread the material out in the same hot pan (or on a separate hot
plate, if made in large quantities) and thoroughly work, beat, and pound the same to
drive out moisture and foreign substances and ordinarily add a small quantity of
sulphur, (as a tablespoonful spread over it). This is worked in with care, so as not to
burn the material. The addition of the sulphur makes the composition spongy and
gives tenacity to the mass. This is worked until the swelling ceases, say for five or
ten minutes. It is then pounded (as with a large hammer or paver's ram) until not
any of the whole-mass will stick to iron, this operation serving to drive out all the
foreign matter. When the gas is all out of the composition and the material is well
mixed together, the compound is ready. The above operations are all done under a
moderate degree of heat, (say not less than 150° Fahrenheit).
After being prepared the composition is put into a mold hot, and it can immediately
(Bay in twenty to forty seconds) be taken out, and the resultant box comes out hard
and smooth and has a polished surface and does not require seasoning or any further
treatment.

page_text: Certain kinds of asphaltum and pitch can be worked with asbestos and sulphur
without the aid of the gutta-percha, and consequently that part of the process,
together with that relating to sulphur, can in some cases be eliminated without in
any way affecting the article as an acid-proof electrical non-conducting material.
It is evident that many changes in the operations described might be resorted to
without departing from the spirit and scope of my invention. I would have it
understood that I do not restrict myself to the particular operations as described, but
that I reserve the right to make such changes, and that
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
1. The process of making a composition which consists in first melting asphaltum
or the like; second, adding thereto, while hot asbestos, and intimately mixing the
two thoroughly together; third, spreading out the mass so mixed, on a hot surface,
and thoroughly working, beating and pounding the same to drive out moisture and
foreign substances; fourth, dusting sulphur thereon and again thoroughly beating,
pounding and working the mass-the mass to be hot throughout the carrying out of
the process; and fifth, forming the article desired of the mass, substantially as set
forth.
2. The herein-described composition of matter consisting of asphaltum, gutta-
percha asbestos and sulphur in approximately the proportions specified.
3. The process of making a composition which consists in first melting asphaltum
or the like; second, adding thereto, while hot, asbestos, and intimately mixing the
two thoroughly together; third, spreading out the mass so mixed, on a hot surface,
and thoroughly working, beating and pounding the same to drive out moisture and
foreign substances; the mass to be hot throughout the carrying out of the process;
and fourth, forming the article desired of the mass, substantially as set forth.
Dated thie 13th der of Mar 1907
WILLIAM MORISON,
By Fowler & Co.,
Agents.