Year: 1897

page_text: Date of Application (in the United Kingdom), 20th Oct., 1897
Complete Specification Left, 20th Oct., 1897-Accepted, 8th Jan., 1898
I, LOUIS BRALY, Gentleman, of 19, Cours de la Liberté, Lyons, in the Republic
of France, 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 a new composition suitable for the manufacture
of matches.
These compositions are characterized by being free from phosphorus and
matches manufactured therefrom are inexplosive and light upon any surface
exactly as the phosphorus matches now in use.
To prepare paste for the manufacture of matches proceed as follows:-
Take on the one hand,
15 parts of good Cologne glue of the best quality and soak it for 12 hours or
more in
40 parts of water at a temperature of from 15 to 20° C. to which is added
3 parts of acetic acid diluted to about 15%.
On the other hand,
3 parts of gum dragon which has been steeped for 12 hours or more in 45 parts
of water also at a temperature of 15 to 20 ° C.
These two liquids mix together, then heat on a water bath to a temperature
of 50 to 60° C. to complete the liquification. Care must be taken not to heat too
much.
Then prepare an intimate mixture of
30 parts of pounded glass.
20
10
وو
hyposulphite of lead.
calcium plumbate.
sulphur.
"
"
5
strontium plumbate.
3
"
2
metallic aluminium.
99
0.05
sodium chloride.
وو
2 to 3
23
calcium mono-sulphide.
These bodies are to be previously finely powdered and sieved.
This mixture is incorporated by degrees with the liquid glue prepared as above

page_text: :
described with the addition of 100 parts of potassium chlorate also to be introduced
by degrees, the temperature being always maintained at about 50° C.
Thus for example of the mixed material and 10 parts of potassium chlorate
are taken and mixed with the glue contained in the mortar and so on.
The paste thus obtained is caused to pass several times through a kneader to
render the mixture as intimate as possible and the paste perfectly homogeneous.
This paste thus prepared, is used for dipping of wooden splints previously
sulphurised, stearined or paraffined or it may be the "bougies" or wax matches.
This operation is carried out in the usual manner.
In this composition the gum dragon and the pounded glass may be replaced by
analogous substances.
In certain cases also the sulphur may be entirely omitted."
This new composition permits of the stoves employed being dispensed with
because matches dipped with it dry very rapidly at the ordinary temperature.
After several hours they may be placed in boxes without anys inconvenience.
They are not subject to spontaneous ignition and they resist humidity well.
In the numerous compositions which have already been proposed if some of the
above bodies have already been indicated they have never been combined as I have
done
Further the use of plumbate of calcium, strontium and of monosulphide of
calcium is altogether novel.
These bodies owing to their oxidizing properties analogous to those of potassium
chlorate allow the combustibility of the mixture to be increased without however
giving it explosive properties.
The chemical decomposition of the bodies employed in the new paste and
especially of the calcium plumbate combined with the strontium, plumbate, the
aluminium and the calcium monosulphide takes place more slowly than is the
case with potassium chlorate; consequently an intimate mixture of these four
bodies diminishes the rapidity of ignition and retards combustion which allows the
match stems to become heated to the necessary temperature for ignition; this result
is not obtained with other pastes, the match heads of which merely explode without
igniting the match.
The use of metallic aluminium is also absolutely novel in the preparation of
pastes for the manufacture of matches.
The aluminium is intended to absorb a portion of the oxygen in the chlorate
and to thus keep it from the sulphur the oxydability of which is stronger.
It has for effect to diminish the rapidity of deflagration.
The composition which forms the object of the present invention is above all
characterized by the use of these three bodies; calcium and strontium plumbates
and aluminium.
The proportions indicated have been given as examples, but of course they may
be varied to a certain extent.
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:-
1. A paste for the manufacture of inexplosive matches without phosphorus
which light upon all surfaces, consisting in the combination in suitable proportions
of a liquid glue, potassium chlorate and a powder formed of a suitable mixture of
pounded glass, hyposulphite of lead, plumbates of calcium and strontium, sulphur,
metallic aluminium, sodium chloride, and monosulphide of calcium.
2. Pastes substantially as described containing some or all of the following
viz: plumbate of calcium, plumbate of strontium, metallic aluminium, mono-
sulphide of calcium.
.t:
Dated this 20th day of October 1897
CARPNAEL & Co