Improvements in the Manufacture of Calcium Carbide and the like and in the Method of Using the same in Lamps or. Generators.
Year: 1897

page_text: PRO OVISIONAL SPECIFICATION.
Improvements in the Manufacture of Calcium Carbide and the
like and in the Method of Using the same in Lamps or.
Generators.
I, FREDERICK HUGH SMITH, The Limes, Dunblane, N.B. Engineer, do hereby
declare the nature of this invention to be as follows:-
This invention relates to improvements in the manufacture of calcium carbide and
the like and in the method of using the same in lamps or generators.
In accordance with my invention the calcium carbide or other similar compound
is reduced to powder or to a fine crystaline state. It is then converted into a heavy
dough or pill mass, by the addition of any suitable substance which will not evolve
gas when in contact with the calcium carbide or the like, such as by the addition of
an oil.
The mass of dough is then converted into pills, tabloids, or pieces and then coated
with wax or other water proof substance.
With this form of using calcium carbide or the like, the gas is generated by
dropping one or more pills or tabloids at a time into the water instead of, as
heretofore, the water being caused to drop on to the carbide.
The pills or tabloids may be supplied to the gas lamp or generator by any suitable
automatic means for example a number of balls or pills may be contained within an
upright tube the one ball resting upon the other, the arrangement being such that
as the gas gets exhausted one or more pills is mechanically caused to be dropped
out of the end of the tube, or other receptacle, into the water below. In order to
allow the water to act upon the carbide contained within the wax coating of the
pills I provide an automatic scratching arrangement, the arrangement being such
that the rising or falling of the gas pressure causes a roughened surface of a
rod or plate to rub against the side of the pill so as to enable the water to come in
contact with the carbide. It will thus be seen that in accordance with my invention
only a limited quantity of carbide is used at a time for forming the gas.
1001
JOHNSONS,
115, St. Vincent Street, Glasgow, Petitioner's Agents.

page_text: Improvements in the Manufacture of Calcium Carbide and the
like and in the Method of Using the same in Lamps or
Generators.
I, FREDERICK HUGH SMITH, The Limes, Dunblane, N.B. 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 relates to improvements in the manufacture of calcium carbide,
or other similar compound, and in the method of using the same in lamps or
generators.
In accordance with my invention the calcium carbide or other similar compound
is reduced to powder or to a fine crystaline state. It is then compressed into tablets
or balls, with or without the addition of some adhesive substance or converted into
a heavy dough or pill mass, by the addition of any suitable substance which will
not evolve gas when in contact with the calcium carbide, such as by the addition of
an oil.
The compressed tablets or balls; and the pills, tabloids or pieces obtained from
the dough or pill mass, are then coated with wax varnish or other water-proof
substance.
With this form of using calcium carbide, the gas is generated by dropping one or
more pills or tabloids at a time into the water instead of, as heretofore, the water
being caused to drop on to the carbide.
The pills or tabloids may be supplied to the gas lamp or generator by any suitable
automatic means, for example a number of balls or pills may be contained within an
upright tube the one ball resting upon the other, the arrangement being such that
as the gas gets exhausted one or more pills is mechanically caused to be dropped
out of the end of the tube, or other receptacle, into the water below. In order to
allow the water to act upon the carbide contained within the wax coating of the
pills I may provide any suitable automatic scratching arrangement, such for example
as the rising or falling of the gas pressure causing a roughened surface of a rod or
plate to rub against the side of the pill and scratch a hole through the varnish so as
to enable the water to come in contact with the carbide.
It will thus be seen that in accordance with my invention only a limited quantity
of carbide is used at a time for forming the gas.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
:-
The method of manufacturing calcium carbide, or other similar compound, a
consisting in reducing the compound to powder and compressing it into tablets; or
converting it into a heavy dough or pill mass by the addition of an oil or the like,
whereby the compound can be formed into pills, tabloids or other shaped pieces,
substantially as and for the purposes herein before described.
Dated this 1st day of July 1807
Dated this 1st day of July 1807
JOHNSONS,
115, St. Vincent Street, Glasgow, Applicant's Agents.