Improvements in Galvanic Dry Elements.
Year: 1890

page_text: This Specification was, upon the 15th day of July 1891, Amended under
Sections 18 to 21 of the Patents, Designs, and Trade Marks Act, 1883.
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Imadurante
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Date of Application, 24th Jan., 1890
Complete Specification Left, 24th Nov., 1890-Accepted, 10th Jan., 1891
PROVISIONAL SPECIFICATION.
Improvements in Galvanic Dry Elements.
I, CASTLE SMITH, of 54 Fleet Street, in the City of London, Gentleman, do hereby
declare the nature of this invention, as communicated to me from abroad by Wilhelm
Louis Frederik Hellesen, of Frederiksborggade No. 34, Copenhagen K, in the
Kingdom of Denmark, Wholesale Merchant, to be as follows:-
:-
This invention relates to a dry manganese element in which the exciting liquid is
mixed with a small percentage of a slimy substance, such as tragacanth slime, mixed
with plaster of Paris, whereby it is possible to close the elements in such a way as to
prevent evanescence and waste to any serious extent. Further the capacity of the
liquid for dissolving zinc is increased to a very high degree and at the same time the
local action when the circuit is broken, has been made practically impossible.
The
The dry element consists of two receptacles one within the other, the interior
receptacle being made of zinc and provided with ventilating holes.
The space
between these two receptacles is filled with sawdust or similar substance.
carbon used is hollow, covered on the outside with a depolarising substance, its
interior being filled with a substanco capable of absorbing a large amount of moisture.
Outside the depolarising substance is a doughy or similar substance containing the
electrolyte. Above this is a porous layer, such as plaster of Paris, covered over with
a very close compact layer, such as pitch, so that the escaping gas must pass through
the plaster of Paris layer, thence through the ventilating holes placed opposite this in
the zinc receptacle, and finally pass out through air tubes close to the bottom of the
outer receptacle.
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1000
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CASTLE SMITH,
Invention" Office, 54, Fleet Street, London, E.C., Agent for the Applicant.
COMPLETE SPECIFICATION (AMENDED).
Improvements in Galvanic Dry Elements.
I, CASTLE SMITH, of 54 Fleet Street, in the City of London, Gentleman, do
hereby declare the nature of this invention and in what manner the same is to be
performed, as communicated to me from abroad, by Wilhelm Louis Frederik
Hellesen, of Frederiksborggade No. 34, Copenhagen K, in the Kingdom of
Denmark, Wholesale Merchant, to be particularly described and ascertained in and
by the following statement :-
This invention relates to dry manganese element in which the exciting liquid
is mixed with a small percentage of a slimy substance, such as tragacanth slime,
mixed with plaster of Paris, whereby it is possible to close the elements in such
a way as to prevent evanescence and waste to any serious extent. Further, the
capacity of the liquid for dissolving zinc is increased to a very high degree, and at
the same time the local action when the circuit is broken, has been made practically
impossible.

page_text: The dry element consists of two receptacles one within the other, the interior
The space
receptacle being made of zinc and provided with ventilating holes.
between these two receptacles is filled with sawdust or similar substance. The carbon
used is hollow covered on the outside with a depolarising substance, its interior being
filled with a substance capable of absorbing a large amount of moisture. Outside the
depolarising substance is a doughy or similar substance containing the electrolyte.
Above this is a porous layer such as plaster of Paris covered over with a very close
compact layer, such as pitch, so that the escaping gas must pass through the plaster
of Paris layer thence through the ventilating holes placed opposite this in the zinc
receptacle and finally pass out through air tubes close to the bottom of the outer
receptacle.
The accompanying drawing shews a section of a dry battery in accordance with my
invention.
L is the outer casing of ebonite or other suitable material; N is the interior
receptacle made of zinc, and M is the filling of sawdust or such like material between
the two receptacles Land N. a a are the ventilating holes in the upper part of the
zinc receptacle N. C is the carbon used of a tubular shape and porous, and having
a head of paraffined carhon G, and D is the depolarising substance, insoluble and
contained in the porous bag H laced with string. The interior of the carbon C is
filled with an absorbent material S such as slag wool impregnated with saline solution.
Above this is the paste of plaster of Paris, tragaeanth, and-saline solution G; B is
the doughy substance containing the electrolyte, above this is common plaster of
Paris E covered at the top with pitch or the like F. The gas escaping from the
electrolyte B must therefore travel through the plaster of Paris E and holes a, a, into
the sawdust M, thence through the air tube or tubes i open at or near the bottom of
the outer receptacle M. g is the brass contact screw and K is wax for protecting the
brass against corrosion; 6 is the wire from the zinc.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, as communicated to me from
abroad, I declare that what I claim is :-
The improved galvanic dry element constructed substantially in the manner set
forth and illustrated, and for the purpose stated.
Dated this 24th day of November 1890
CASTLE SMITH,
Invention "Office, 54, Fleet Street, London, E.C.
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CASTLE SMITH,
Invention "Office, 54, Fleet Street, London, E.C.