Improvements relating to Electric Fuzes.
Year: 1893

page_text: Date of Application, 21st July, 1893
Complete Specification Left, 23rd Apr., 1894-Accepted, 25th May, 1894
DE BUIFICATION.
Improvements relating to Electric Fuzes.
J, FRANCIS WILLIAM THOMAS BRAIN of Trafalgar House, Cinderford, in
the County of Gloucester, Civil and Mining Engineer, do hereby declare the nature
of this invention to be as follows:-
This invention has for its object, the improvement of high tension or spark fuzes
with a view to ensure that they may possess greater certainty of ignition, have
less liability to be affected by moisture or other causes; and, further to be more
sensitive in action than has heretofore been attainable, when fired by magnets or
other exploders.
Hitherto in electric fuzes of the type to which my invention refers, the circuit of
the two conducting wires conveying the electricity is interrupted within the casing.
of the fuze, and a combination of chemicals usually consisting of chlorate of potash,
sulphide of antimony and phosphide of copper or of some slight variation of these
or similar substances. This combination is intimately mixed and interposed in the
break or interruption above referred to.
Now, in order to obtain the advantageous results set out in the first paragraph
hereof, I substitute for the phosphide of copper above referred to, silver and
platinum; thus resulting in a chemical composition, consisting of chlorate of potash,
sulphide of antimony, silver, and platinum in suitable proportions intimately mixed.
The necessary quantity of this explosive mixture is inserted in the fuze in the
usual way.
Dated this 20th day of July 1892
JAMES
STEVENSON,
Gray's Inn Chambers, 20, High Holborn, London, W.C.,
Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements relating to Electric Fuzes.
I, FRANCIS WILLIAM THOMAS BRAIN, of Trafalgar House, Cinderford, in
the County of Gloucester, Civil and Mining 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 has for its object the improvement of high tension or spark fuzes
with a view to ensure that they may possess greater certainty of ignition, have less
liability to be affected by moisture or other causes, and further to be more sensitive
in action when fired by magnets or other exploders, than has hitherto been
attainable.
Hitherto in electric fuzes of the type to which my invention refers, the circuit of
the two conducting wires conveying the electricity is interrupted within the casing
of the fuze, and a combination of chemicals usually consisting of chlorate of
potash, sulphide of antimony, and phosphide of copper or of some slight variation
of these or similar substances. This combination is intimately mixed and
interposed in the break or interruption above referred to.
Now in order to obtain the advantageous results set out in the first paragraph
hereof, I substitute for the phosphide of copper above referred to, silver and
ΓΙ'
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page_text: tinum, thus resulting in a chemical composition, made up or consisting of, or in
about the proportionate parts of each, as, hereunder stated, thus say :-
1 part silver, 1 part platinum, 4 parts chlorate of potash, 2 parts sulphide
of antimony,
Or, 1 part platinum, 2 parts silver, 4 parts chlorate of potash, 6 parts
sulphide of antimony,
Or, 1 part silver, 2 parts platinum, 6 parts chlorate of potash, + parts
sulphide of antimony,
Or, 1 part platinum, 4 parts silver, 8 parts chlorate of potash, 4 parts
sulphide of antimony,
Or, 1 part platinum, 3 parts silver, 6 parts chlorate of potash, 2 parts
sulphide of antimony,
Or, 1 part silver, 3 parts platinum, 3 parts chlorate of potash, 5 parts-
sulphide of antimony,
Or, 1 part silver, 4 parts platinum, 5 parts chlorate of potash, 2 parts 1
sulphide of antimony.
Otherwise under another mode of procedure, I might employ (still in substitution
the phosphide of copper) either silver or platinum alone, combined with the
orate of potash and sulphide of antimony, of which latter combinations I append
following as exemplars :-that is to say:―
JAMES
STEVENSON,
1, Furnival Street, Holborn, E.C., Agent for Applicant.