Process for Produolug Percussion Bands for Igniting Devices used in Miners' and other Lamps.
Year: 1895

page_text: Date of Application, 5th Oct., 1895-Accepted, 9th Nov., 1895
Process for Produolug Percussion Bands for Igniting Devices used
in Miners' and other Lamps.
1, HEINRICH FREISE, of Hamme Bochum, in the Empire of Germany,
Engineer, do hereby declare the nature of this invention aud in what manner the'
same is to be performed, to be particularly described and ascertained in and by
the following statement
-
The present invention consists of a process for producing a percussion band for
igniting devices, as used in coupection with mineis lamps, and the object is to
produce a band which will not produce soot or other deposits on the glass of the
lamp when the pellets or explosive parts are exploded. This is of particular
importance in connection with miners lamps because in the ordinary igniting
devices the pellets in exploding produce deposits on the lamp glass and thus render
the light produced still more dim, the light being at its best, hardly sufficient for
the purpose.
In order to rende the present Specification more easily intolligible reference is
had to the accompanying drawing in which similar letters denote similar parts
throughout the several views.-
Fig. 1 being a side elevation and Fig. 2 a longitudinal section through one form
of igniting band constancted according to the present invention and Figs. 3 and 4
being similar views of a modified form of carrying out the invention.
According to the present process a stup of sulphu a is fist attached to the
strip of fabric b said sulphur strips being arranged transversely to the length of
the fabric These strips are partially covered with intermediately arrangerl
igniting strips c, the stup of fabite being provided at the ica side with strips of
material corresponding to the mass employed in connection with Swedish matches
(tandstickors), these latter stups of being arranged at the rear of, and corresponding
in width, with, the frictional igniting surfaces c Between the strips are
ananged strips of lycopodium e. Instead of lycopodium any equivalent mass or
composition such as wood meal with resin and collodium on the like, may be
employed.
The fabe is perforated at those parts, to which the masses c and d are applied
so that on igniting the mass c the flame can penetrate the fabric to the mass at
the opposite side. The flame is in the form of a jet flame which in combination
with the easily inflammable lycopodium strip effects a rapid ignition of the lamp
Figures 3 and show a more simple method of making the strips according to
this method the band cousists of a very loosely woven fabric having at certain
distances apart a cross thread of greater diameter than those of which the fabric
18 composed, in order to cause more fiction, when the band is diawn through
opposing surfaces. This band is provided with transversely disposed strips of thice
different masses. The first stip consists of an igniting mass c similai in com-
position to that of the Swedish matches, the second consists of sulphur and the
third is a mixture of an adhesive or binding medium and lycopodium. The adhesive
selves as a binding medium and the lycopodium serves to produce a small bright
flame which burns without producing any smoke black whatever.
The best method of production is the following one :-
A strip of sulphur is formed at one side of the fabric then a strip of igniting
mass and then a strip of lycopodium the opposite side of the fabric boing coated

page_text: entely with lycopodium. Tho whole band is then provided with a thin coating
of collodium or its equivalent. This collodium coating possosses, in addition to its
elasticity, the advantage, that it not ouly burns smokelessly but also increases the
inflammability of the band, owing to its property of rapidly catching fire, so that
the risk of the band hanging fire is obviated. By treating the bands with the
three substances,-igniting mass, sulphur and lycopodium. -as also by means of tho
collodium coating an igniting strip or band is produced which buns perfectly
smokelessly.
The igming stups constructed according to the method last dose bed require
more friction to ignite them than those described at first.
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 An guiting band adapted to buin smokelessly, consisting of a loosely woven
fabric, having at one side a number of strips of sulphur and intermediate strips of
igniting mass, and at the opposite side, corresponding with the latter strips a
second gmiting mass adapted to produce a jet flame or to explode, the spices
between the latter strips being filled out with a coating of lycopodium or other
equivalent mass such as a mixture of wood meal, resin and collodium on the like
substantially as described.
2. A more simple form of the arrangement covered by Claim 1 consisting of a
loosely woven fabric having at certain distances apart a thicker thread as specified,
and having alternating strips arranged transversely of the band, of igniting mass,
of sulphur and of lycopodium, the opposite side of the said strip or baud being
covered entuely with a lycopodium coating, the whole being covered with an easily
inflammable coating, substantially as described.
Dated this 5th day of October 1895.
HASELTINE, LAKE & Co,
45 Southampton Buildings, London, W.C., Agents for the Applicant