and Apparatus for Destroying Insects and their Larvae in Flour Mills, Granaries, and Bakeries.
Year: 1897

page_text: Date of Application, 2nd July, 1897
Complete Specification Left, 4th Apr., 1898--Accepted, 2nd July, 1898
Process and Apparatus for Destroying Insects and their Larvae in
Flour Mills, Granaries, and Bakeries.
I, PETER KIEFER, Miller, of Fahr, near Neuwied, in the Province of Rhine-
land, and Kingdom of Prussia, do hereby declare the nature of this invention
to be as follows:-
The process consists essentially in drawing away, by means of an exhauster
or other suitable blast-apparatus, the fumes arising from burnt sulphur, from
the place where it is burnt and driving them into the place in which the insects
and their larvae are to be destroyed. In doing this care must of course be
taken, especially in mills, to prevent any sparks escaping into spaces filled
with flour-dust and thus causing a conflagration or an explosion of flour-dust.
That sulphur-fumes are suitable for killing vermin and their eggs without
injuring the quality of the flour or grain has been proved by many experiments
and has long been considered as scientifically established and acknowledged.
What is wanted now is to offer to the public an apparatus adapted for the simple
and convenient carrying out of the above described process, which shall not be
too complicated, nor too high in its initial expense, and which at the same time
can be easily transported, thus rendering possible the introduction and general
adoption of the process.
This end is attained by my apparatus, represented in the accompanying
diagram. Fig. 1 shows it in perspective, with partially longitudinal section
through single parts, while Fig. 2 gives a cross-section of the brazier used for
burning the sulphur.
The apparatus consists first of all of two trestles A A, connected below by
cross-beams or a floaring B on which the separate parts of the apparatus proper
are fastened, and above by two rods C C with ends projecting on both sides
which can be used as handles for lifting or for transporting the whole apparatus.
Under the flooring B or the cross-beams substituted for it is placed the
brazier D in which the sulphur-sticks or threads dipped in sulphur are burnt
either directly on the bottom or lying on separate bars, and which is open at E
allowing the air for combustion free access to the sulphur, while at the opposite
end F the suction-pipe G of the exhauster H is joined, whose force-pipe J leads.
to a boiler K. In the interior of this boiler K placed one upon the other at a
certain distance, are two smaller boiler-mantles K1 K2 whose sides are equally
perforated, but the perforations of Kl are larger than those of K2.
From K2 a pipe L, leads right through the sides of K1 and K to the outside.
From this results that the fumes, forced through the exhauster H and the pipe J
inta K, pass at first through the layer perforations of K1 quite into the interior
of the boiler carrying down with them. to the bottom any sparks which may
have been drawn in through the perforated sides.
To render innocuous any further sparks which may have been carried along
is the object of the following contrivance.

page_text: The pipe L leads into a boiler M filled up to a certain height with water, the
end of the pipe L being bent downwards and opening into the boiler M just
above the level of the water, so that all escaping gases or vapours strike first
against the surface of the water thus parting with any chance sparks. At the
same time the mouth of I may be, as represented somewhat widened like a funnel.
In the upper part of this boiler M under the cover N a second cover O perforated
like a sieve is affixed, through the middle of which the pipe P which carries
off the gases is lead, on to which is fitted as may be most convenient a hose or
tubing that conducts the gas to the spot in the interior of the work room or
store house wherever it is required. Between the two lids N and of the
boiler M one or more roses q Q, or similar apparatus are fixed through which
a fine spray of water is continually falling over the sieve-like lid O, by which
the last sparks are finally extinguished. In order to prevent the water used
for spraying over the sieve O from trickling through and collecting at the
bottom of the boiler M and thus raising the level of the water above the opening
of the pipe L, the sieve O is arched above, and on the side where at its entering
the boiler M a sort of circular groove has been formed in which the water collects,
a drain-pipe R is fixed leading below the surface of the water, into an open
tub S from which the water, when collected, can be let off if necessary by means
of an overflow- or waste-cock.
In order to be able to control from the outside the height of the water in the
boiler Ma water-gauge T is affixed to the latter.
The impelling of the exhauster is done by hand by means of the crank U, of
a fly-wheel V, and the necessary transference by cords or straps and a corre-
sponding cord or strap-dise; if required also by the insertion of a cog-wheel
transmitter.
The apparatus is so manipulated that, with pauses of about ten minutes long
the exhaustor is set in motion by turning the crank U, thereby air is drawn
in to the sulphur causing its vigorous combustion, and the gases thus produced
are driven through the apparatus into the places to be smoked with brimstone,
while so soon as the turning of the exhauster is stopped, the further combustion
of the sulphur likewise ceases.
The effect and manipulation of the apparatus is so simple that it will be
comprehended by every body without further explanation.
Dated this 1st day of July 1897.
For PETER KIEFER,
Bernhard Brockhues.
Process and Apparatus for Destroying Insects and their Larvae in
Flour Mills, Granaries, and Bakeries.
I, PETER KIEFER, Miller, of Fahr, near Neuwied, in the Province of Rhine-
land, and Kingdom of Prussia, 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: -
The process consists essentially in drawing away, by means of an exhauster
or other suitable blast-apparatus, the fumes arising from burnt sulphur from
the place where it is burnt and driving them into the place in which the insects
and their larvae are to be destroyed. In doing this care must of course be
taken, especially in mills, to prevent any sparks escaping into
spaces filled
with flour-dust and thus causing a conflagration or an explosion of flour-dust.

page_text: That sulphur-fumes are suitable for killing vermin and their eggs without
injuring the quality of the flour or grain has been prooved by many experiments
and has long been considered as scientifically established and acknowledged.
What is wanted now is to offer to the public an apparatus adapted for the simple
and convenient carrying out of the above described process, which shall not be
too complicated, nor too high in its initial expense and which at the same time
can be easily transported, thus rendering possible the introduction and general
adoption of the process.
This end is attained by my apparatus, represented in the drawing filed with
the Provisional Specification.
:
Fig. 1 shows it in perspective, with partially longitudinal section through
single parts, while Fig. 2 gives a cross-section of the brazier used for burning
the sulphur.
The apparatus consists first of all of two trestles A. A, connected below by
cross-beams or a flooring B on which the separate parts of the apparatus proper
are fastened, and above by two rods C C with ends projecting on both sides
which can be used as handles for lifting or for transporting the whole apparatus.
Under the flooring B, or the cross-beams substituted for it, is placed the
brazier D in which the sulphur-sticks or threads dipped in sulphur are burnt
either directly on the bottom or lying on separate bars, and which is open at E
allowing the air for combustion free access to the sulphur, while at the opposite
end the suction-pipe G of the exhauster H is joined; whose force-pipe J leads
to a boiler K.
In the interior of this boiler K placed one upon the other at a certain distance
are two smaller boiler-mantles K1 K2 whose sides are equally perforated but
the perforations of K 1 are larger than those of K 2.
From K2 a pipe L leads right trough the sides of K 1 and K to the outside.
From this results that the fumes, forced through the exhauster H and the pipe J
into K, pass at first through the larger perforations of K 1 quite into the interior
of the boiler carrying down with them to the bottom any sparks which may
have been drawn in through the perforated sides.
To render innocuous any further sparks which may have been carried along
is the object of the following contrivance.
The pipe L leads into a boiler M filled up to a certain height with water, the
end of the pipe L being bent downwards and opening into the boiler M. just
above the level of the water, so that all escaping gases or vapours strike first
against the surface of the water thus parting with any chance sparks. At the
same time the mouth of 7 may be, as represented somewhat widened like a funnel.
In the upper part of this boiler M under the cover N a second cover perforated
like a sieve is affixed, through the middle of which the pipe P which carries
off the gases is lead, on to which is fitted as may be most convenient a hose or
tubing that conducts the gas to the spot in the interior of the work room or.
store house wherever it is required. Between the two lids and, o och
boiler M one or more roses or similar apparatus are fixed through which
a fine spray of water is continually falling over the sieve-like lid 0 by which
the last sparks are finally extinguished. In order to prevent the water used
for spraying over the sieve O from trickling through and collecting at the
bottom of the boiler M and thus raising the level of the water above the opening
of the pipe L, the sieve O is arched above, and on the side where at its entering
the boiler M a sort of circular groove has been formed in which the water collects,
a drain-pipe R is fixed leading below the surface of the water, into an
tub S; from which the water, when collected, can be let off if necessary by means
of an over-flow- or waste-cock.
open
In order to be able to control from the outside the height of the water in the
boiler M a water-gauge T is affixed to the latter.
The impelling of the exhauster is done by hand by means of the crank U of
a fly-wheel V, and the necessary transference by cords or straps and a corre-

page_text: sponding cord or strap-disc; if required also by the insertion of a cog-wheel
transmitter.
The apparatus is so manipulated that with pauses of about ten minutes long
the exhauster is set in motion by turning the crank U thereby air is drawn
in to the sulphur causing its vigorous combustion, and the gases thus produced
are driven through the apparatus into the places to be smoked with brimstone,
while so soon as the turning of the exhauster is stopped the further combustion
of the sulphur likewise ceases.
The effect and manipulation of the apparatus is so simple that it will be
comprehended by every body without further explanation.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed I declare that what
I claim is
1.) Process and apparatus for the destruction of insects and their larvae in
flour-mills, granaries and bakeries thereby characterized that the fumes of
burnt sulphur are drawn off by means of an exhauster and, all sparks that may
have been carried along being kept back, are driven through a pipe or hose
into the places to be smoked with brimstone.
2.) An apparatus for carrying out the process characterized in Claim 1),
particularized by the arrangement of a brazier with sulphur D connected by
a pipe G with the exhauster H, of a boiler K with two boilers inside K1 K2
and connecting pipe J to the exhauster L, to the boiler M with water in the
lower part under the opening of L and a sieve-like cover O in the upper part
under the roses Q, as well as the suction-pipe P above in the centre, also the
waste-pipe R opening under water into a tub S where the water coming from
the roses Q collects; the whole with a contrivance for driving by hand, mounted
on a portable frame by the trestles A, A, a floor or cross-beams B and the rods C.
Dated this 20th day of March 1898.
For PETER KIEFER,
Bernh. Brockhues.