Improvements in and connected with Acetylene-generators.
Year: 1898

page_text: Improvements in and connected with Acetylene-generators.
I, ADOLF GRAETZ, of 6, Claudius Strasse, of Berlin, Kingdom of Prussia,
German Empire, Manufacturer, do hereby declare the nature of this invention
to be as follows:-
-
This invention relates to improvements in acetylene generators, more especially
with reference to an acetylene generating plant, operating automatically in all its
parts. The apparatus consists generally of two generating vessels which are
alternately placed in use, secondly of a water tank to supply water to the carbide,
and thirdly of a gasometer, the movement of which is caused to control the
water supply. This water supply is so regulated that at the moment when one
generating vessel is entirely exhausted and filled with water, the water service
is automatically transferred to the other generating vessel.
In order to make my invention more clear, I refer to the accompanying draw-
ings, in which similar letters denote similar parts throughout the different views,
and in which:-
Figure 1 shows a sectional elevation through the entire apparatus in which
however only one generator is shown,
Figure shows a plan, and
Figures 3-10 show details of the separate parts of the apparatus.
The generator consists of a vessel A, said generator being closed by a bell B
immersed in water. Under this bell is a pipe C to conduct the gas generated
under the bell. This pipe C has at its upper end an extension D in the interior
of which is a double operating valve E, operated by springs. The valve is so
arranged that, when not weighted from the top, the valve closes the inlet of the
gas pipe in consequence of the action of a spring F. This entire valve device
is located in a dome-shaped portion of the generating gas-holder having an
opening at the top, which said opening is closed by the top part of the valve E
when the said bell is pressed down by rods G. Hereby is attained, that when
the bell is lifted for the purpose of cleaning or of refilling the generator, that
automatically the opening of the pipe C closes, and the said air aperture of the
top portion of the bell is opened, so that air can enter the generator, whilst,
when the bell is pressed down by the rods G, .e. when the apparatus is in
working condition, the said opening at the top of the gas holder becomes closed,
and, as is clear from the drawing, the aperture of the pipe C will then be
caused to be open.
Under this bell B are located carbide vessels H the same being arranged in
tiers or stages, so that when the surface of the water gradually rises under the
bell in the manner hereinafter more fully described, one carbide vessel after the
other will generate gas. The generating vessels consist of cylinders closed at
their lower end and provided with overlapping covers to protect these vessels
from the influence of the moist air before they become entirely saturated with

page_text: water. The top edge of the cylinder can also be covered with gauze and may
have slots cut out in zigzag or other suitable form along the top edge to facilitate
the passage of the water.
The covers have further the advantage that the same force the generated gas
to be washed by the water, whilst the gas passes around the edge of the cover
and to be thus subjected to a kind of cleansing process whereby the greater
portion of calcium which may have been carried away by the gas is held back.
Within this carbide receptacle the carbide is contained in bags or under small
bell-shaped vessels for the purpose of keeping the calcium together as far as
possible. Under the bell is further a water discharge T closed by a valve T¹ the
valve of which can be lifted by a chain, when the generator is opened, said water
discharge T terminating in a syphon.
The water supply takes place alternately to one or the other generating vessel
whilst each time the one generator which is not in use is recharged with carbide.
The changing of the water supply from one generator to another takes place auto-
matically at the moment when, as hereinbefore indicated, the generating vessel
last in action becomes entirely filled with water and therefore exhausted.
The special form of this device for effecting an alternate water supply is
shown in Figures 3, 4 & 5, said device consisting of a vessel d, which can be
rotated around a central axis, the outlet of which vessel according to the position
of same, being sometimes over the first and sometimes over the second acetylene
generator. The circular movement of the vessel d is so effected, that when the
water overflows in one generator (or more precisely at a fixed height of the
water) a pail or other shaped vessel is caused to fill. By the weight of the water
the pail sinks or descends and actuates by means of a chain in known manner
the vessel d, in such manner, that the said vessel partly revolves in consequence
of which the water supply pipe comes over the second generator.
The accompanying drawing of this apparatus Figure 3 shows the same with
the exteriorly suspended pails, the said pails or the like can, however, also be
located in the interior of the generator.
The drawings show one form of this apparatus; only A A' (Figure 3) designate
the generating vessels each of which is closed by a bell B immersed in water.
The water is conducted through a pipe C (Figure 3) to the preliminary vessel d
which has a discharge pipe e branching off in a lateral direction. The vessel </
can be rotated upon a pivot f, and is provided with a lever arm 9 at its side
towards the carbide vessel. At the end of this lever arm g a chain his attached
which actuates the lever arm upon the ascent and descent of the pails jj. As
soon as the generator A has become filled to a certain point, the still flowing
water will overflow at and fill the pail j, so that the same will sink and will
draw with it the chain and the connected lever-arm g, whereupon the water
supply pipe e, which had previously discharged water into the generating vessel a
will now discharge water into the generator A as indicated in dotted lines in
Figure 3. The alternation device of the water supply from one generating vessel
to the other is for the sake of the clearness of the figures not shown in Figure 1.
In order to prevent at any moment during the working of the apparatus an
excess of carbide being present with too small a quantity of water whereby
dangerous overheating could take place the following arrangement has been
made viz. that after the water supply has been cut off by the action of the
gasometer, a certain quantity being so much that the carbide vessel in process
of generating the gas becomes immersed.
The modus operandi is as follows:
The water flows as shown in Figure 1, from a tank J through an opening K
(which can be closed by a valve) into a tank L at the under side of which is
another small tank M in which a syphon N is located.
This syphon N so operates that when the valve at K stops the further flow
of water, to the tank L, that then the water in the tank M in one stream is
drawn off by the syphon N.

page_text: Hereby as indicated the acetylene vessel in generation is overflowed or
immersed and an overheating avoided. The operation of opening and closing
of the water valve K is effected by a suitable lever mechanism or device 0, the
actuation of which takes place by the rise and fall of the gasometer.
The gas
is conducted to the gasometer through the pipe C and withdrawn from the same
by the pipe C¹.
Furthermore the gasometer is provided with a safety-device, for the purpose
of providing the possibility of any excess of gas passing to the open air, should
such excess take place in consequence of a blocking of the apparatus or a too
rapid or excessive generation of gas.
Hereby also all extreme pressures are obviated.
For this purpose a central pipe Q is provided within the gasometer bell, said
pipe Q being somewhat shorter than the gasometer. In this pipe Q is provided
another pipe R reaching almost to the surface of the water within the gasometer.
When now the gasometer rises higher than is permissible, the under end of
the tube will emerge from the water and will allow gas to pass out of the
pipe QR.
To avoid however an escape of gas between the pipes Q and R a cup shaped
portion S is provided at the lower end of the tube Q which portion S by being
immersed in water even at a high position of the gasometer bell effectually pre-.
vents within the required limits all escape of the gas.
From the gasometer the gas before being conducted to the place of use is
caused to pass through a washer or cleanser, which is so arranged as to admit
of the entry of water at all times, even when in operation or use. Figure 6
shows a gas cleanser of this description. The same consists of a cylindrical
vessel 1 separated by a dividing wall 2 into two divisions or chambers 3 & 4,
of which chambers the latter forms the gas washing chamber proper, and in
which the gas enters through the pipe 5 and passes out through the pipe 6.
The dividing wall 2 does not touch the bottom but terminates several centimeters
away from the same.
In the said dividing wall 2 is an opening 7 from which a conical or other
shaped tube 8 extends below the surface of the water of the division or chamber 4.
The opening 7 may also be provided with a funnel-shaped portion for filling
purposes.
The pipe extending from the opening 7 into the liquid of the division 4 is
formed or limited on the one side by one portion of the dividing wall 2 and on
the other by the circular partition 8. 9 is an overflow and 10 a loosely fitting
hinged cover for the chamber 3. The fact that the inflowing gas cools and
expands partly in the pipe service and partly in the apparatus, the greater or
less amount of moisture carried with the gas becomes deposited, it will thus be
clear that in consequence of this a continual renewal of the water will take place
firstly in the chamber 4, and in consequence of the distributing and oscillating
movement of the liquid in both chambers, also a renewal of the washing liquid
in the division 3 will be effected. The opening at 7 allows of a lasting and easy
control of the composition of the washing liquid and if desirable, also an inser-
tion of solid cleansing substances to the said cleansing chambers.
To control or register during the operation of the apparatus which, (or how
many) carbide vessels under the generator bell have already been exhausted, I
mount upon the gasometer a device, which registers the exhaustion of each car-
bide vessel or the corresponding sinking and reascent of the gasometer.
This control or registering device is shown in Figure 7 attached to a gasometer
and in Figures 8 & 9 the working of the same is shown.
The mechanism of the said registering device consists principally of a wheel
and pawl mechanism, and a pawl 7 on which the two weights m and n operate.
The heavier weight m is at its one end connected to the said pawl 7, and at its
other end is connected to the gas holder or gasometer. As long as the gasometer
is in its lowest position, i.e. as long as either no generation or only a slight

page_text: generation of gas takes place the registering mechanism is not in action. As
soon however, as water enters a fresh carbide vessel, and the gasometer bell
rises, the weight m will be lifted by the chain o. The release of the weight m
causes, as is apparent, the chain to receive extra-weight, whereby the pawl is
moved one tooth further on. At the moment when the gasometer sinks in
consequence of a withdrawal of gas from the same, or, in consequence of the
exhaustion of the carbide in the carbide receptacle last in action, the weight m
will move the toothed wheel p one tooth further on, so that the index g mounted
upon the axis of the said wheel will indicate the consumption of the gas just
developed. If therefore the index is placed at o, the advance of the said index
will indicate the successive exhaustion of the separate carbide vessels in the
generator.
In conclusion I may remark that with large apparata even when each separate
carbide vessel is separately generated it may happen that the movement of the
gasometer may not be sufficient to actuate the supply of water as well as the
registering device with sufficient speed.
In this case it is desirable to employ another or a further pipe, said further
pipe branching off from the main pipe, which conducts the acetylene to the
gasometer, and ferminating under an auxiliary gasometer. Upon this auxiliary
gasometer would be placed or connected, both the mechanism actuating the water
supply and that of the registering device, the said auxiliary gasometer, upon
the generation of gas from each fresh carbide receptacle, (in consequence of the
apparent considerably greater or extended movement of said smaller auxiliary
gasometer) actuating the water supply and the registering device with absolute
certainty and safety.
Figure 10 shows an acetylene generating plant of this description in which r
designates the auxiliary gasometer and s the pipe, which as shown in the draw-
ing has been branched off from the main gas pipe of the larger gasometer for
the purpose herein before described.
Dated this 18th day of April 1898.
GEO. H. RAYNER,
Agent for the Applicant.
Improvements in and connected with Acetylene-generators.
I, ADOLF GRAETZ, of 6, Claudius Strasse, of Berlin, Kingdom of Prussia,
German Empire, Manufacturer, 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 relates to improvements in acetylene generators, more especially
with reference to an acetylene generating plant, operating automatically in all its
parts. The apparatus consists generally of two generating vessels which are
alternately placed in use, secondly of a water tank to supply water to the carbide,
and thirdly of a gasometer, the movement of which is caused to control the
water supply. This water supply is so regulated that at the moment when one
generating vessel is entirely exhausted and filled with water, the water service
is automatically transferred to the other generating vessel.
In order to make my invention more clear, I refer to the drawings filed with
the Provisional Application, in which similar letters denote similar parts through-
out the different views, and in which:

page_text: Figure 1 shows a sectional elevation through the entire apparatus in which
however only one generator is shown,
Figure 2 shows a plan, and
Figures 3-10 show details of the separate parts of the apparatus.
The generator consists of a vessel A, said generator being closed by a bell B
immersed in water. Under this bell is a pipe C to conduct the gas generated
under the bell. This pipe C has at its upper end an extension D in the interior
of which is a double operating valve E operated by springs. The valve is so
arranged that, when not weighted from the top, the valve closes the inlet of the
gas pipe in consequence of the action of a spring F. This entire valve device
is located in a dome-shaped portion of the generating gas-holder having an
opening at the top, which said opening is closed by the top part of the valve E
when the said bell is pressed down by rods G in any suitable manner. Hereby
is attained, that when the bell is lifted for the purpose of cleaning or of refilling
the generator, that automatically the opening of the pipe C closes, and the said
air aperture of the top portion of the bell is opened, so that air can enter the
generator, whilst, when the bell is pressed down by the rods G, which rods can
be arranged in any suitable manner, i.e. when the apparatus is in working
condition, the said opening at the top of the gas holder becomes closed, and, as
is clear from the drawing, the aperture of the pipe C will then be caused to be
open.
Under this bell B are located carbide vessels H the same being arranged in
tiers or stages, so that when the surface of the water gradually rises under the
bell in the manner hereinafter more fully described, one carbide vessel after the
other will generate gas. The carbide vessels consist of cylinders closed at the
bottom and provided with overlapping covers, which covers protect the carbide
against the influence of the moist air before the vessels are filled with water.
When the water rises, these covers will float. The top edge of the cylinder can
also be covered with gauze and may have slots cut out in zigzag or other suitable
form along the top edge to facilitate the passage of the water.
The covers have further the advantage that the same force the generated gas
to be washed by the water, whilst the gas passes around the edge of the cover
and to be thus subjected to a kind of cleansing process whereby the greater
portion of lime dust which may have been carried away by the gas is held back.
Within this carbide receptacle the carbide is contained in bags or under small
bell-shaped vessels for the purpose of keeping the formed lime together as far
as possible. Under the bell is further a water discharge T closed by a valve T
the valve of which can be lifted by a chain, when the generator is opened, said
water discharge T terminating in a syphon.
The water supply takes place alternately to one or the other generating vessel
whilst each time the one generator which is not in use is recharged with carbide.
The changing of the water supply from one generator to another takes place auto-
matically at the moment when, as hereinbefore indicated, the generating vessel
last in action becomes entirely filled with water and therefore exhausted.
The special form of this device for effecting an alternate water supply is
shown in Figures 3, 4 & 5. said device consisting of a vessel d, which can be
rotated around a central axis, the outlet of which vessel according to the position
of same, being sometimes over the first and sometimes over the second acetylene
generator. The circular movement if the vessel is so effected. that when the
water overflows in one generator (or more precisely at a fixed height of the
water) a pail or other shaped vessel is caused to fill. By the weight of the water
the pail sinks or descends and actuates by means of a chain in known way
the vessel d, in such manner, that the said vessel partly revolves in consequence
of which the water supply pipe comes over the second generator.
Now one generator is exhausted and the carbide vessels can be refilled. At
the safe time the pail has to be emptied by hand.
The drawing of this apparatus (Figures 3, 4 & 5) shows the same with the

page_text: exteriorly suspended pails, the said pails or the like can, however also be located
in the interior of the generator.
The drawings show one form of this apparatus only:
aal (Figure 3) designate the generating vessels each of which is closed by
a bell immersed in water. The water is conducted through a pipe c (Figure 3)
to the preliminary vessel which has a discharge pipe e branching off in a lateral
direction. The vessel d can be rotated upon a pivot f, and is provided with a
lever arm at its side towards the carbide vessel. At the end of this lever
arm a chain his attached which actuates the lever arm upon the ascent, and
descent of the pails jj. As soon as the generator has become filled to a
certain point, the still flowing water will overflow at % and fill the pail j, so that
the same will sink and will draw with it the chain and the connected lever-arm g,
whereupon the water supply pipe e, which had previously discharged water into
the generating vessel a will now discharge water into the generator a¹. The
alternation device of the water supply from one generating vessel to the other
is for the sake of the clearness of the figures not shown in Figure 1.
In order to prevent at any moment during the working of the apparatus an
excess of carbide being present with too small a quantity of water whereby
dangerous overheating could take place an arrangement has been made by means
of which after the water supply has been cut off, under action of the gasometer,
a certain quantity of water being so much that the carbide vessel in process of
generating the gas becomes immersed, is supplied to the generator.
The modus operandi is as follows:
The water flows as shown in Figure 1, from a tank J through an opening K
(which can be closed by a valve) into a tank L at the under side of which is
another small tank M in which a syphon N is located.
.
This syphon N effects a suction of the water contained within the tank M when
the valve at K stops. the further flow of water, so that said tank M is emptied
in one stream by the syphon N, after the water in the tank L has flown out.
Hereby as indicated the acetylene vessel in generation is overflowed or
immersed and an overheating avoided. The operation of opening and closing
of the water valve K is effected by a suitable lever mechanism or device 0, the
actuation of which takes place by the rise and fall of the gasometer. The gas
is conducted to the gasometer through the pipe C and withdrawn from the same
by the pipe C¹.
Furthermore the gasometer is provided with a safety-device, for the purpose
of providing the possibility of any excess of gas passing to the open air, should
such excess take place in consequence of a blocking of the apparatus or a too
rapid or excessive generation of gas.
Hereby also all extreme pressures are obviated.
For this purpose a central pipe Q is provided within the gasometer bell, said
pipe Q being somewhat shorter than the gasometer. In this pipe Q is provided
another pipe R reaching almost to the surface of the water within the gasometer.
When now the gasometer rises higher than is permissible, the under end of
the tube will emerge from the water and will allow gas to pass out of the
pipe QR.
To avoid however an escape of gas between the pipes Q and R a cup shaped
portion S is provided at the lower end of the tube Q which portion S by being
immersed in water even at a high position of the gasometer bell effectually pre-
vents within the required limits all escape of the gas.
From the gasometer the gas before being conducted to the place of use is
caused to pass through a washer or cleanser, which is so arranged as to admit
of the entry of water at all times, even when in operation or use Figure G
shows a gas cleanser of this description. The same consists of a cylindrical
vessel separated by a dividing wall 2 into two divisions or chambers 3 & 4,
of which chambers the latter forms the gas washing chamber proper, and in
which the gas enters through the pipe 5 and passes out through the pipe 6.

page_text: The dividing wall 2 does not touch the bottom but terminates several centimeters
away from the same.
In the said dividing wall 2 is an opening 7 from which a conical or other
'shaped tube 8 extends below the surface of the water of the division or chamber 4.
The opening 7 may also be provided with a funnel-shaped portion for filling
purposes.
The pipe extending from the opening 7 into the liquid of the division. 4 is
formed or limited on the one side by one portion of the dividing wall 2 and on
the other by the circular partition 8, extending from the opening downwards.
9 is an overflow and 10 a loosely fitting hinged cover for the chamber 3.. The
fact that the inflowing gas cools and expands partly in the pipe service and
'partly in the apparatus, the greater or less amount of moist vapours carried with
the gas becomes deposited, and cooled in the chamber 4. It will thus be clear
that in consequence of the depositing of vapours a continual renewal of the water
"will take place firstly in the chamber 4, and in consequence of the distributing
and oscillating movement of the liquid in both chambers, also a renewal of the
washing liquid in the division 3 will be effected. The opening at 7 allows of
a lasting and easy control of the composition of the washing liquid and if desir
able, also an insertion of solid cleansing substances to the said cleansing chambers.
To control or register during the operation of the apparatus which (or how
many) carbide vessels under the generator bell have already been exhausted, I
mount upon the gasometer a device, which registers the exhaustion of each car-
bide vessel i.e. the sinking and reascent of the gasometer, which corresponds to
the exhaustion of one vessel.
This control or registering device is shown in Figure 7 attached to a gasometer
and in Figures 8 & 9 the working of the same is shown.
The mechanism of the said registering device consists principally of a wheel
and pawl mechanism, and a pawl on which the two weights m and n operate.
The heavier weight m is at its one end connected to the said pawl 1, and at its
other end is connected to the gas holder or gasometer. As long as the gasometer
is in its lowest position i.e. as long as either no generation or only a slight
generation of gas takes place the registering mechanism is not in action. As
soon however, as water enters a fresh carbide vessel, and the gasometer bell
rises, the weight m will be lifted by the chain o. It is apparent, that the
weight receives an over-weight, when the weight m is lifted. Thereby the
pawl is moved one tooth further on. At the moment when the gasometer sinks
in consequence of the exhaustion of the carbide in the carbide receptacle last in
action, the weight m will move the toothed wheel one tooth further on, so that
the index q mounted upon the axis of the said wheel p will indicate the consump-
tion of the gas just developed. If therefore the index is placed at o, the advance
of the said index will indicate the successive exhaustion of the separate carbide
vessels in the generator.
In conclusion I may remark that when using a very large apparatus it may
happen that the movement of the gasometer may not be sufficient to actuate the
supply of water as well as the registering device with sufficient exactitude.
In this case it is desirable to employ another or a further pipe, said further
pipe branching off from the main pipe, which conducts the acetylene to the
gasometer, and terminating under an auxiliary gasometer. Upon this auxiliary
gasometer would be placed or connected, both the mechanism actuating the water
supply and that of the registering device, the said auxiliary gasometer, upon the
generation of gas from each fresh carbide receptacle, (in consequence of the
apparent more exact and more frequent movement of said smaller auxiliary
gasometer) actuating the water supply and the registering device with absolute
certainty and safety.
Figure 10 shows an acetylene generating plant of this description in which r
designates the auxiliary gasometer and s the pipe, which as shown in the draw-

page_text: ing has been branched off from the main gas pipe of the larger gasometer for
the purpose herein before described.
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. An acetylene-gas-generating apparatus, having several gas-generators A, a
gasometer P and cleansing tank 1, said gasometer and tank being common to
each generator A, characterised by the carbide contained in covered vessel H
being exhausted by water continually overflowing the said vessels H; the supply
of water being regulated by or from the said gasometer P, the said water-supply
upon the exhaustion of one generating vessel being automatically changed to
another generating-vessel, substantially as described.
2. In an acetylene-gas-generating apparatus, as characterised in Claim 1: The
generator consisting of a gas-holder B, immersed in water in a basin A; carbide-
receptacles H provided with overlapping covers arranged under the said holder B,
the latter having also at its upper end a kind of dome opening, towards the top, the
said opening being closed by a double-acting valve E, when the gas-holder or
bell B is held down in the described position, whilst upon the said gas-holder
being lifted, the valve E releases the air-opening in the dome, and simultaneously
closes the opening D of the pipe C, which terminates in the said dome, sub-
stantially as described.
3. In an acetylene-gas-generating apparatus, as characterised in Claim 2;
The valve-device E, consisting of two valves connected to each other by a spindle,
said valve E being attached to the end of the gas-supply pipe C, said end of the
pipe C forming a kind of head, whereby the lower valve-dise located within said
tube-head by means of a spring is pressed upwards against the top-edge of the
tube-head when the top-valve disc is not weighted by the gas-holder B of the
generator A, substantially as described.
4. In an acetylene-gas-generating apparatus, as characterised in Claim 1:
Carbide-receptacles H in which the upper outlet of the same is closed by an
overlapping cover adapted to float when the water is rising, the tops or covers
of which carbide receptacles may be provided with rims or edges, the carbide
within said receptacles being located under a small bell or in a bag, whereby,
for purposes of facilitating the exit of the gas, the upper edge also of said car-
bide-receptacles may be provided with zigzag-slots or the like, or be covered with
gauze, substantially as described.
5. In an acetylene-gas-generating apparatus, as characterised in Claim 1:
The alternating or reversing-mechanism for the water-supply, characterised by,
vertically moving pails being arranged to or into the generating-vessels a a²,
which after being completely filled, that is to say, after the exhausting of the
one generating vessel has caused the overflow of the water to fill the said pails,
the weight of the water thus introduced into the pails causes the same to descend
and to convey their descending movement by means of a chain h in such manner
to a water-supply vessel d, that the same partly rotates, whereby the water-
supply is transferred to another carbide receptacle, substantially as described.
6. In the water-supply-device claimed under Claim 5, the arrangement of a
water-tank L M with a syphon N, below the discharge valve K for the water,
for the purpose of allowing, (upon the closing of the water-supply by the
ascending of the gasometer or gas-holder P) such quantity of water to flow
to the generating vessel, that a certain excess of water is conveyed to the carbide
receptacle in which the generation of the gas is taking place, substantially as
described.
7. In an acetylene-gas-generating apparatus, as characterised in Claim 1:
A gasometer, in which a safety-pipe is arranged, said safety-pipe being made
gas-tight by means of a water-cup S, whereby upon the ascent of the gas-holder

page_text: above a certain limit the excess of the generated gas is conducted into the open
air, substantially as described.
8. In an acetylene-gas-generating apparatus, as described in Claim 1: The
gas-washing apparatus characterised by the arrangement of a vertical wall 2,
by means of which the said washing apparatus is divided into two communicating
chambers 3 & 4, the said vertical wall 2 extending not quite to the bottom of
the said gas-washing apparatus; the closed washing space 4 being accessible
from the beforesaid division 3 by means of a tube 8 attached to an opening of
the separating wall 2, said tube 8 extending under the level of the washing
liquid into the washing-space proper, substantially as described.
9. In an acetylene-gas-generating apparatus, as described under Claim 1: A
controlling or counting-device to indicate the number of carbide-receptacles,
consisting of a pawl-mechanism, the pawl of which is actuated by weights m
and n, the gasometer in its ascent lifting the larger weight m, the smaller
weight, hereby getting a certain overweight and causing the pawl move
one tooth further on, the toothed wheel whilst the descent of the gasometer,
again causes the larger weight m to come into action, and to move the toothed
wheel of the said controlling or counting device, and hereby the index
attached thereto, to the extent of the angle corresponding to the forward move-
ment of the pawl, substantially as described.
10. In an acetylene-gas-generating apparatus, as characterised in Claim 1,
the employment of an auxiliary gas-holder of smaller volume, said auxiliary
gas-holder being connected to a tube branching off from the main gas-supply-
pipe C, leading to the larger gasometer, and the connection of this auxiliary
gasometer with the water-supply and with the controlling or counting-device for
the carbide vessels, for the purpose of utilizing the more exact and more frequent
movement of this auxiliary gas-holder to actuate the water-regulating device
and the controlling or counting-device, substantially as described.
Dated this 26th day of September 1898.
GEO. H. RAYNER,
37, Chancery Lane, London,
Agent for the Applicant.