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Патент USA US2131041

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Patented ‘Sept.’ 27, 1938
_
I
UNITED STATES PATENT OFFICE
I
i
géglgmo coMrosi
George ?nale, liover, N. .I.
No Drawing.’ Application April 10, 1936,
Serial No. 73,768
1
(01- (5377-24)
' (Grahams the act otrMarch- 3, last. as
amended sun so, 1928; 370 o. G. my
,_'I'he invention described herein maybe nianu-
which include amongothers, sodium, potassium,
factured and used by or for the Government for . barium and strontium, produce gas and intensify
governmental purposes, without the payment ‘to
me of any royalty thereon. >
6
the light.
‘
' Examples of non-explosive pyrotechnic compo
This ‘invention relates to a non-explosive pyro, technic composition.
_
'
One‘ or the disadvantages of the various com-
sitions prepared in accordance with the invention 5
herein set forth are as follows, the proportions
being by weight:
positions in general use for pyroteehniepurposes
is the explosion hazard which exists in the manu'
l0 facture and use of such‘ materials. This explo- '
sion hazardis largely due to the fact that the
“
‘
- 1‘
'
20 iactoryvpyrotechnic composition but must have
incorporated with them a gaseous forming sub-
:tgggxhich brings the mixture within the class> 25 gaseous
The present
forming
invention
substances
resides
mayinbethe
mixed
fact with
that
substances which upon combustion unite to form‘
55
Sulphur.
.
compositions have not come into general use for
the reason that they alone do not make a satis-
Per cent
5
2. Barium chromate___________________ __ 68-70
Magnesium _______________________ _‘__ 25-27
While it has been suggested that pyrotechnic
, compositions be made of ingredients which, upon
combustion, produce solids instead of gases, such
>
Magnesium
,
30 1o
Barium nitrate ________________________ __ 10
. materials when mixed are sensitive to shock and
geiilmizgnsgtand' the ordinary drop tests without
'
1. Iron oxide
sodium nitmfp
Linseed n"
-
_
.
3 l6
2
3- strontium chromate___________________ .. 53
I Magnesium
‘
40
Strontium nitrate _____________________ __
- Castor oil
-
5 '0
2
4_ Potassium bmhmmate ___; _____________ __ 30
?ggggs?npemxide
strontium resinate ____________________
""""""""""" __
" ‘15 25
_
r
_
solids to form ef?cient and satisfactory pyrotechnic compositions for long burning signal
lights qf high candle power while maintaining
30 the non-explosive character of the composition.
, In carrying out the invention a‘mixture is pre-
As may be ‘readily Seen from the examples given
above a binder may be used with the mixtures
when deemed necessary or desirable.
DI'OD- tests have Shown that when more the-n so
25% by Weight of the gas producing element 01‘
pared which consists; ?rst, of an oxide or a chromate or both as the oxidizing component of the
mixture, second, of one or more metals which are
35 adapted tolreact with the oxides and chromates
to form solid compounds, third,‘ of 9. light in- ’
elements is present in the mixture they are ex
plosive. This test is the usual one of subjecting
a specimen of the mixture to the blow delivered
by e- 2 kg- Weight falling freely from a Stated
height.
‘5
tensi?er which yields gas upon combustion.
I claim!
‘
These substances are so proportioned that the gas
yielding substance or substances will not exceed
A pyrotechnic composition including a metallic
oxidizing agent selected from the class consisting
40 twenty-?ve percent by weight of the whole.
Upon reaction of the ingredients mentioned in
the last paragraph the oxygen as given o? by the
of chromates and oxides, a metallic fuel adapted
to react with the oxidizing agent to form a solid,
and a gas-forming and light-intensifying alkali
oxides or chromates combines with the metal
or alkaline earth compound selected from the
45 magnesium
selected from
to form
the compounds
a solid, whileofthethe
constituents
alkali'or
amount
class consisting
less than
of nitrates,
twenty-?ve
andper
resinates,
cent ofin the
an
alkaline earth elements of Groups I and II of
the Periodic Table of chemical elements and
whole.
’
1
'
‘5
GEORGE C. HALE.
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