IMPROVEMENTS IN GAS BLOW-PIPE MACHINES
Year: 1877

page_text: LETTERS PATENT to Albert Silbermann, of Berlin, in the German Empire,
for the Invention of "IMPROVEMENTS IN GAS BLOW-PIPE MACHINES."
Sealed the 13th June 1878, and dated the 21st December 1877.
PROVISIONAL SPECIFICATION left by the said Albert Silbermann at the
Office of the Commissioners of Patents on the 21st December 1877.
ALBERT SILBERMANN, of Berlin, in the German Empire.
GAS BLOW-PIPE MACHINES."
"IMPROVEMENTS IN
This Invention has for its object the production of an apparatus simple in
construction and economical in use, whereby, with a mixture of gas and air, great
heat may be generated, while at the same time it may be regulated so as to serve
for the melting of metals generally, soldering, and for many purposes required either
in the laboratory, manufactory, or industrial workshop.
The apparatus consists of an external case, cylindrical in its general form, and
having at the lower part an outlet conduit, which projects and terminates in a
nozzle, where the nixture of gas and air may be burned. Within this case there is
placed eccentrically, and working upon a shaft, six or more or less arms or fans,
made of tin plate and wire gauze. On each side of the cylindrical part of the case
there is a chamber, into which gas is admitted by suitable pipes, and which has a
slide with two V shaped openings, whereby the quantity of air to be admitted may
be proportioned to the gas employed. The case has also two arms that carry a shaft,
on which a large and a small pulley are fixed. The whole is mounted on a stand,
similar to that of a sewing machine, the motion being communicated from the foot
to a treadle which operates upon a shaft and fly wheel. From this fly wheel, by
means of a strap passing over the smallest of the two pulleys just now mentioned,
the motion is conveyed, and from the larger pulley, also by means of a strap, the
motion is transmitted to a pulley fixed on the shaft to which the fans or vanes are
attached.

page_text: Where steam or other motive power is used in the workshop, such power may be
transmitted to the largest of the pulleys, and the treadle and fly wheel dispensed
with.
The use and action of the apparatus is as follows:-The gas tap and slide is to be
closed. Motion is then imparted to the fans by means of the treadle and fly wheel,
and the gas tap opened. The gas will flow into the chambers, and from thence into
the body of the case, from which it will be driven by the fans with force to the
outlet or nozzle, where it is to be lighted, and will burn with a white or yellow
flame. The slide covering the air ways is now to be opened and adjusted to such
an extent as will proportion the admission of air to the quantity of gas used, and
this will be known by the colour and character of the flame as it issues from the
nozzle.
The flame may be varied either by the alteration of the supply of gas, the admis-
sion of air, or the speed of the fans, which may run ordinarily at from three thousand
to four thousand revolutions per minute.
The size or thickness of the flame may be varied too by the attachment of different
sized nozzles.
To prevent accident it is prudent, when the flame is not further wanted, to shut
off the gas and continue the action of the fans for a few seconds longer. By this
ineans the chambers will be cleared from any explosive mixture

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Albert Silbermann in the Great Seal Patent Office on the 15th
June 1878.
ALBERT SILBERMANN, of Berlin, in the German Empire.
GAS BLOW-PIPE MACHINES."
"IMPROVEMENTS IN
This Invention has for its object the production of an apparatus simple in
construction and economical in use, whereby, with a mixture of gas and air, great
heat may be generated, while at the same time it may be regulated so as to serve.
for the melting of metals generally, soldering, and for many purposes required either
in the laboratory, manufactory, or industrial workshop.
The apparatus consists of an external case, cylindrical in its general form, and
having at the lower part an outlet conduit, which projects and terminates in a
nozzlo, where the mixture of gas and air may be burned. Within this case is placed
eccentrically, and working upon a shaft, six or more or less arins or fans, made of
tin plate and wire gauze. On each side of the cylindrical part of the case there is
a chamber, into which gas is admitted by suitable pipes, and which has a slide with
two V shaped openings, whereby the quantity of air to be adınitted may be pro-
portioned to the gas employed The case has also two arms that carry a shaft, on
which a large and a small pulley are fixed. The whole is mounted on a stand,
similar to that of a sewing machine, the motion being communicated from the foot
to a treadle which operates upon a shaft and fly wheel. From this fly wheel, by
means of a strap passing over the smallest of the two pulleys just now mentioned,
the motion is conveyed, and from the larger pulley, also by means of a strap, the
motion is transmitted to a pulley fixed on the shaft to which the fans or vanes are
attached.
Where steam or other motive power is used in the workshop, such power may be
transmitted to the largest of the pulleys, and the treadle and fly wheel dispensed
with.
In order that the foregoing may be more easily understood, Drawings are attached
hereto, of which the following is a description :-
Fig. 1 is a side elevation, with the side plate removed, in order that the interior
of the apparatus may be seen.
Fig. 2 is a vertical section of the case, showing the fans inside, the view being
taken from the nozzle end of the machine, and Fig. 3 is a plan of Fig. 1.
In each of the Figures similar letters refer to the same parts.
A is the base plate of the machine, and B the case containing the fans C mounted
upon the spindle D which projects through the side of the case, and has a pulley E
fastened on it; F, F, are arms which support a shaft G, and upon this shaft is
mounted a driving pulley H and a multiplying pulley I, the driving pulley receiving
motion from a fly wheel beneath the stand by means of a strap which passes round
both, while the multiplying pulley I communicates this motion by means of a strap
or elastic band to the pulley Ĕ J is the general gas inlet, and K, K, are two
branches therefrom which lead by short india-rubber tubes L, L, to the inlets M, M,
that open into the chambers 0, 0, one on each side of the machine; P, P, P, is a
slide having two V shaped spaces Q, Q, cut out. This slide with its spaces open or
close the bottom of the chambers 0, 0, and serve to regulate the entry of air, the
closing or opening being effected by pushing or pulling the knob R attached to the
front end of the slide; S is the outlet for the combined gas and air, and where the
mixture is burned. This outlet may be reduced by the fixing thereto of nozzles,
diminishing in size according to the size of the flame required; T, T, are screws for
fastening the base plate of the machine to the stand. The fans Care driven in the
direction of the arrows, and are made of wire gauze, as shown in Fig. 2.
The use and action of the apparatus is as follows:-The gas tap and slide is to be
closed. Motion is then imparted to the fans by means of the treadle and fly wheel,

page_text: and the gas tap opened. The gas will flow into the chambers O, O, and from
thence into the body of the case, from which it will be driven by the fans C with
force to the outlet or nozzle S, when it is to be lighted, and will burn with a white
or yellow flame. The slide P covering the air ways is now to be opened, and
adjusted to such an extent as will proportion the admission of nir to the quantity
of gas used, and this will be known by the colour and character of the flame as it
issues from the nozzle.
The flame may be varied cither by the alteration of the supply of gas, the admis-
sion of air, or the speed of the fans, which may run ordinarily at from three thousand
to four thousand revolutions per minute.
The size or thickness of the flame may be varied too by the attachment of different
'sized nozzles.
To prevent accident it is prudent, when the flame is not further wanted, to shut
off the gas and continue the action of the fans for a few seconds longer. By this
means the chambers will be cleared from any explosive mixture.
Gas blow-pipe machines are not new, but gas blow-pipe machines wherein a
mixture of gas and atmospheric air is made by the revolution of wire gauze or
perforated metal fans is new.
Having now described and particularly set forth the nature of this Invention,
and the manner in which the same is or may be used or carried into effect, I would
observe in conclusion that I do not confine or restrict myself to the precise details or
arrangements which I have described or referred to, as variations may be made
therefrom without deviating from the principles or main features of this Invention,
but what I consider to be novel and original, and therefore claim as the Invention
secured to me by the herein-before in part recited Letters Patent is, the construction
of gas blow-pipe machines, whereby an intimate mixture of gas and atmospheric air
is made, and subsequently ejected, by the revolution of wire gauze or perforated
metal fans, arranged as herein described, and shown on the Drawings.
In witness whereof. I, the said Albert Silbermann, have hereunto set my
hand and seal, this Twelfth day of June, in the year of our Lord One
thousand eight hundred and seventy-eight.
ATDODA
דרד חותמת ATT