Year: 1899

page_text: I, OTTO BOETTCHER, of No. 137, Kurfürstendamm, Charlottenburg, Germany,
Manufacturer, do hereby declare the nature of my invention to be as follows:-
The present invention consists of an acetylene gas generator for household and the
like purposes, the apparatus being specially adapted for producing small or compara-
tively small quanties of gas. According to the invention no gasometer is employed,
and only the amount of gas required for the time being is generated, means being
provided to prevent after production when the flames are extinguished.
The apparatus consists of a calcium carbide holder, having the gas supply pipe con-
nected thereto, the said holder being suspended in a water reservoir and having a
double valve at the bottom of the same. The pipe connection to the holder is such
that it may be adjusted in the bearings in which the holder is suspended, so as to
vary the height of the said holder in the water, and the valve at the bottom of the
holder is provided with a stem extending out at the bottom of the holder and adapted,
when the holder is lowered to contact with the bottom of the water reservoir and
operate the valve.
The double valve is mounted in a vertically or approximately vertically disposed
housing having an upper conically shaped opening, opening into the interior of the carbide
holder. The said housing is also provided with a lower valve seat on to which the
valve is closed under the influence of a spring, when the stem of the valve is not in
contact with the bottom of the holder. The said stem is produced upwardly and
tapered at the top so as to fit or close more or less into the conical boring at the top
of the housing and regulate the water supply to the carbide. Thus when the holder
is lowered in the reservoir, the lower end of the valve stem contacts with the bottom
of the water reservoir, in which the said holder is suspended, and the operation is first
to open the lower valve by raising it off its seat, if however the holder is still
further lowered the conical upper end of the valve stem will enter the conical boring
of the housing and will decrease and regulate the supply of water to the carbide.
Thus according to the position of the holder in the reservoir the supply of water to
the carbide will be regulated and the valve will be entirely closed if the holder is
raised far enough to allow the valve spring to act and also if it is lowered far enough
to cause the conical upper end of the stem to close into the boring of the housing.
When the flames are turned off or no more gas is required, the holder is brought into
one of its extreme positions and the water supply cut off, the gas which may be
generated after the supply has been cut off, will pass out of the holder along the
supply pipe and be consumed, the flame going gradually out.
241
3
C A
1004
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.

page_text: İ, OTTO BOETTCHER, of No. 137, Kurfürstendamm, Charlottenburg, Germany, Manu-
facturer, do hereby declare the nature of my invention and in what manner the
same is to be performed to be particularly described and ascertained in by the
following statement :-
The present invention relates to acetylene gas generators and its object is to
dispense with the gasometer and bell as also with the gas outlet cock at the apparatus,
the quantity of gas generated being dependent on the amount required and when
the generation is to cease, the supply of water to the calcium carbide is cut off
and the flames allowed to burn out the small quantity of gas left in the carbide
holder.
In order to render the present specification more easily intelligible reference is had
to the accompanying drawing which shows a vertical section through an apparatus
constructed according to the present invention.
The carbide holder b is adjustably suspended in the water receptacle c by means
of the gas outlet pipe a. A sleeve e having external thread is adapted to screw in a
bushing in the carbide holder cover, in which the said sleeve may be adjusted
vertically, by means of a handwheel for other suitable device. The sleeve e is
slotted vertically at the top and may be clamped to the pipe a by means of a nut f.
The pipe a is gas-tightly fitted to the cover g of the carbide holder b. To the bottom
of the receptacle a housingh for a double valve is fixed, said housing projected
inwardly and having an upper conically formed end with a tapering opening m there-
through. The lower part of the housing is provided with a valve seating k, against
which a valve is adapted to close under circumstances herein after set forth. The
valve has a downwardly extending stemn d, adapted to contact with the bottom of the
water receptacle when the carbide-holder is lowered. The valve has further an
upwardly projecting stem i having a conical top adapted to fit into and close or
partially close the through way m. The valve is spring-pressed down on to its seat k
so as to close the water inlet.
The device operates in the following manner :-
When the apparatus is not in use the carbide-holder is in its raised position and
the stem of the valve is above the bottom of the water receptacle so that the water
inlet valve at k is closed. When it is desired to generate acetylene gas the carbide
holder b is lowered a certain distance, according to the number of flames required to
burn and the valve will be slightly opened so that a very fine jet of water will be
able to pass to the carbide in the holder through m and gas will be generated,
passing along the pipe to the points of consumption. If too much gas is being
generated for the number of flames the holder may be lowered slightly further, when
the conical end of the valve i will be inserted into the opening and regulate the
water inlet. The pointed regulating valve i also serves the clean the opening m
should it get stopped up from any cause. It will thus be seen that the pressure of
the gas and the quantity generated will be regulated by the height of the water
column in the water receptacle. If the pressure of gas inside the holder exceeds the
pressure of the water column no more water will for the time being enter the opening m
and thus the gas regulates itself automatically. If the supply is to be cut off the
carbide holder is simply raised and the valve closes under the action of its spring.
If the carbide holder is taken out for refilling, the valve of the same will also be
closed as will be obvious.

page_text: 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: In an acetylene gas generator having a carbide holder, vertically adjustable
by means of the supply pipe connected thereto, the combination of a spring pressed
valve in the bottom of the holder, which latter is immersed in water, said valve
being located in the carbide holder above the carbide and being adapted to allow the
water to pass to the carbide in a very fine jet, excessive gas pressure in the holder
being sufficient to prevent the water from entering at all and the said valve being
inaccessible from the exterior of the generator, substantially as described.
2-In the acetylene gas generator covered by Claim 1, the combination of a
double seated valve having a needle pointed upper end to project into the opening
into the carbide holder and a downwardly projecting stem to operate the valve by
resting against the bottom of the water receptacle containing the carbide holder,
when the latter is lowered in the water receptacle substantially as described.
Dated the 17th day of June 1899.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.