Pyrotechnic Device. Page: 2 of 3
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UNITED STATES PATENT OFFICE.
CHARLES F. GRABER, OF DALLAS, TEXAS, ASSIGNOR TO EDWARD H. WAGNER, OF
NEW YORK, N. Y.
PYROTECHNIC DEVICE.
No. 902,650. Specification of Letters Patent. Patented Nov. 3, 1908.
Application filed October 5. 1907. Serial No. 395,993.
To all whom it may concern: resents a shell or covering of- thin tissue
Be it known that I, CHARLES F. GRABER, paper, or other suitable tissue or material, 3
a citizen of the United States, residing at is a suitable covering glue, dextrin, or other
Dallas, in the county of Dallas and State of suitable surface of a gummy or sticky nature,
5 Texas, have invented certain new and useful and 4 is a protective shell or coating, as 60
Improvements in Pyrotechnic Devices; and wood-pulp or the like, which ser es as a
I do hereby declare the following to be a full, 1 safety covering or protection against the ac-
clear, and exact description of the invention, cidental ignition of the pyrotechnic device
such as will enable others skilled in the art to while the same is being handled, or while
10 which it appertains to make and use the packed in boxes and cases and in transit 65
same, reference being had to the accompany- from place to place.
ing drawings, and to characters of reference The pyrotechnical composition of matter
marked thereon, which form a part- of this usually employed for the pyrotechnic device
speci ication. . is manufactured in the following manner.
15 This invention relates, generally, to im- Ten pounds of thick gum-arabic with suffi- 70
provements in pyrotechnic devices; and, the cient-water, say about one gallon are placed
invention relates, more particularly, to a in a vessel and heated to provide a compara-
pyrotechnic device comprising a suitable tively thin but sticky mass. To this mass is
pyrotechnic composition capable of being then added one pound and fourteen ounces
20 exploded by percussion and inclosed with a of stick or white phosphorus, the latter be- 75
safety-coating, so as to provide device of coming intimately intermingled or mixed
the general character hereinafter more fully with the gum-arabic and water in said sticky
set forth which shall be free from accidental mass while the latter is agitated and while it
ignition due to any friction caused in han- is kept hot. As soon as the several ingre-
25 ding the device, or while carrying the same dients have been thoroughly incorporated, 80
in the pocket, or while in transmission when three pounds and six ounces of carbonate of
packed for shipment from place to place. magnesium are added. The mixture is then
My present invention has for its principal allowed to cool, while still stirring or agitat-
object to provide a new and simple, as well as ing the mass, so as to obtain an intimate
30 a perfectly safe pyrotechnic device known in mixture. Six pounds of chlorate of potash 85
the art as crazy crackers; and, the invention rapidly stirred in one pint of boiling water so
has for its further object to provide a novel as to produce a paste-like mass, are then
pyrotechnic device which shall be perfectly added so as to obtain a plastic or putty-like
safe against accidental ignition due to fric- mass. Pieces of thin tissue are then placed
35 tion in the handling or shipping of the fin- in suitable molds and the plastic or putty- 90
ished product. like mass poured or put upon each piece of
Other objects of this invention not at this paper in the depression of a mold. After
time more particularly enumerated will be folding over the projecting edge-portion of
clearly evident from the following detailed the tissue paper or other thin material used
40 description. the article or body thus formed is tamped 95
My invention consists, primarily, in the tight and removed from the mold* and al-
novel pyrotechnic device hereinafter more lowed to dry. The bodies are then.dipped
fully described, and in the novel process or into liquid glue, gum, dextrin, or other suit-
method of making the same. able liquid of a gum-like or sticky nature, so
45 In the accompanying drawing is illus- as to produce the hereinabove mentioned 100
trated in transverse section, on an enlarged } surface 3, which is then finally coated with a
scale,:a crazy cracker showing one of the uses protective material, such as wood pulp or a
to which my novel pyrotechnical compound material of a similar nature, the same being
may be put, the crazy cracker being ignited sifted upon or otherwise applied to the still
50 by scratching, as in the manner of igniting a gummy or sticky surface 3, so as to adhere to 105.
match, or by throwing the article down upon the same and thereby produce the shell or
a hard surface, in the manner of the usual coating 4 previously mentioned, which as
hand-torpedoes. soon as the finished product has finally dried
In the said drawing, the reference-charac- forms a suitable safety covering against the
55 ter 1 indicates the pyrotechnic device, 2 rep- accidental ignition of the pyrotechnical com- 110
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Graber, Charles F. Pyrotechnic Device., patent, November 3, 1908; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth510240/m1/2/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.