Improvements in Apparatus for the Manufacture of Acetylene Gas.
Year: 1897

page_text: Date of Application, 1st Mar., 1897
Date of Application, 1st Mar., 1897
Complete Specification Left, 1st Dec., 1897—Accepted. 26th Feb.
1898
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for the Manufacture of Acetylene Gas.
We, GEORGE BALDWIN, of 9, Electric Parade, Seven Sisters Road, Herbalist, and
CORNELIUS CRASTIN, of 16, Tollington Road, Engineer, both in Holloway, in the
County of London, do hereby declare the nature of this invention to be as
follows:-
Our invention relates to apparatus for the manufacture of acetylene gas and has
for its chief object to provide means for ensuring that when the consumption of
gas ceases all free water shall be at once discharged from contact with the calcium-
carbide whereby the generation of gas ceases as soon as the carbide is dry.
In carrying out our invention we employ a water tank to the side of which the
generator is fixed, the said generator having both its upper and lower ends in com-
munication with the water tank; the said generator has also a gas escape pipe ex-
tending from its upper end to the upper end of the water tank.
The water pipe connected to the upper end of the generator extends vertically
up from the bottom of the water tank and is adapted to be closed by a float valve,
when the water in the tank is below a certain level. The gas pipe connecting the.
top of the generator with the water tank is also provided with a valve which is
operated to open and close it by the said.float.
The water pipe connecting the bottom of the generator with the water tank has
inside the water tank a valve which opens to allow water to pass from the generator.
into the tank but will not allow water to flow in the reverse direction.
A second or displacement water tank is placed above the level of the water tank.
to receive the water displaced from the latter by the gas.
With the arrangement of pipes and valves hereinbefore described water is ad-
mitted from the water tank into the generator so long as the consumption of gas
goes on.
Should the consumption of gas cease the gas which continues to be generated.
owing to the wet state of the carbide forces water into the displacement tank until.
the float valve shuts off the water from the generator. As owing to the wet state
the generation of gas still proceeds the water level in the water tank is still further-
lowered so that the float closes the valve in the gas pipe between the generator and.
the water tank whereby as the gas further generated forces out any free water from.
the generator through the bottom water pipe the valve on which automatically
opens and closes.
The small quantity of gas still further generated owing to the.
damp state of the carbide also escapes through this valve into the water tank.
Suitable cocks are arranged to regulate the flow of water from the water tank,
into the generator and a gauge is provided on the front of the water tank to in-'
dicate the quantity of water displaced and consequently the quantity of gas in the,
apparatus.
In practice we prefer to construct our apparatus with two generators and arrange.
suitable cocks so that one can be charged whilst the other is in work. We also.
prefer to arrange loose baskets in the generator for containing the carbide and

page_text: removing the residue. At the bottom of the generator we arrange small traps for
collecting any residue which may escape from the said baskets.
Dated this 1st day of March 1897.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.
Improvements in Apparatus for the Manufacture of Acetylene Gas.
We, GEORGE BALDWIN, formerly of 9, Electric Parade, Seven Sisters Road,
Holloway, in the County of London, but now of 5, Clive Road, West Dulwich, in
the County of Surrey, Herbalist, and CORNELIUS CRASTIN, of 16, Tollington Road,
Holloway, in the County of London, Engineer, 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 invention relates to improvements in apparatus for the manufacture of acety-
lene gas, and has for its chief object to automatically supply water to the calcium
carbide when the pressure of the gas within the storage tank or holder falls below a
given point to cut off such supply when the gas pressure rises above a given point
and upon a further rise of the gas pressure caused by a reduction or cessation of the
consumption of gas to at once discharge all free water from contact with the carbide
permitting the latter to dry and thereby causing the generation of gas to cease.
In carrying the invention into effect a combined water tank and gas storage
chamber is employed upon the exterior of which is arranged a gas generator which
is provided with a loose pot or basket for containing the carbide and removing the
residue.
The water tank is placed in communication with the upper part of the generator
by a pipe fitted with a regulating feed valve so as to supply water to the carbide,.
the upper part of the generator is by a pipe placed in communication with the upper
part of the water tank so as to allow of the passage of gas thereto and the lower
part of the generator is by a pipe fitted with a non-return valve placed in com-
munication with the water tank so as to allow the gas under certain conditions
to blow the free water from the carbide into the water tank.
Above the water tank is arranged a displacement cistern the lower part of which
is placed in communication with the water tank by a pipe which extends nearly to
the bottom of the latter and serves to receive water displaced from the water
tank by the gas passing into the water tank from the generator.
The water supply pipe connecting the water tank with the upper part of the
generator and supplying water to the carbide extends vertically upward within the
water tank and is adapted to be closed or opened by a float actuated valve when the
water in the tank falls below or rises above a given level and the gas pipe connecting
the upper part of the generator with the water tank is also provided with a valve
which is similarly operated by the said float.
With the arrangement of pipes and valves herein before described a regulated
supply of water from the tank is admitted to the generator so long as the consump-
tion of gas is equal to the generation thereof but upon the consumption lessening
or ceasing the continued generation of gas will increase the pressure in the water
tank and displace water therefrom into the displacement cistern until the water in
the tank falls below the upper part of the water supply pipe leading to the generator.
and ceases to flow and the float actuated valve closes the communication between
the tank and the water supply pipe or cuts off the supply of water to the generator

page_text: as the case may be according to the height of the feed outlet to the generator
and the like position of the float actuated water valve.
By reason of the wet state of the carbide the generation of gas still continues and
the water level in the tank is still further lowered so that the float permits the
closing of the valve controlling the gas pipe conveying gas from the generator
to the water tank whereby the gas further generated can only find an exit from the
generator through the bottom water pipe and non-return valve and consequently
forces out from the generator all free water whilst the small quantity of gas still
further generated owing to the damp state of the carbide escapes by the same
channel into the water tank.
Suitable cocks are arranged to cut off or regulate the flow of water from the
water tank into the generator and of gas from the generator into the water tank
and a guage is provided on the front of the tank to indicate the degree of dis-
placement or level of the water and consequently the volume of gas stored in 'the
tank.
In practice it is preferred to construct the apparatus with two generators and to-
arrange the regulating or cut off cocks so that one generator at a time is put in.
action thus permitting one to be charged whilst the other is at work.
A small trap is provided at the bottom of each generator for collecting any residue.
which may escape from the carbide baskets.
And in order that the said invention may be more clearly understood and readily
carried into effect we will proceed aided by the accompanying drawings more fully.
to describe the same.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a front elevation of an apparatus for the manufacture of acetylene gas.
constructed according to the present invention.
Figure 2 is a plan thereof.
Figure 3 is a vertical longitudinal section thereof taken on the line 1-1 of:
Figure 4.
Figure 4 is a vertical transverse section taken on the line 2-2 of Figure 3.
Figure 5 is a horizontal section taken on the line 3-3 of Figure 3 showing
more particularly the shape of the spindle of the automatic water valve..
Figure 6 is a sectional view of the water tank and some adjacent parts separately
illustrating more particularly the alarm for indicating when a charge of calcium
carbide is exhausted.
Figure 7 is a detail view of part thereof.
Figure 8 is a vertical section of one of the pots or baskets for containing the
calcium carbide but with the tray removed.
Figure 9 is a plan thereof.
Figure 10 is a similar view of the tray.
Figure 11 is a plan thereof.
Figure 12 is a horizontal section of the gas valve that it is preferred to employ
taken on the line 4-4 of Figure 13.
Figure 13 is a vertical longitudinal section taken on the line 5-5 of Figure 12.
Figure 14 is a face view of the moveable valve disc and connected parts
separately.
Figure 15 is a vertical section thereof.
Figure 16 is a vertical section of the sight feed regulator that it is preferred to.
employ for controlling the flow of water to the calcium carbide and
Figure 17 is a similar view taken at right angles to Figure 16.
In the several figures in which like parts are indicated by similar letters of
reference Figures 5 and 7 and 12 to 17 are drawn to an increased scale with respect
to the other figures of the drawings.
Referring to Figures 1 to 11 a represents a closed water tank and gas holder
which is provided with a manhole and cover a¹ for cleaning and repairing purposes
and fitted with a drainage cock a² and 6 represents an open-topped displacement
cistern which is located at a suitable elevation above the tank a and communicates

page_text: with such tank by means of a vertical pipe 61 extending nearly to the bottom of the
tauk a, and c represent two gas generators one of which is arranged upon each
side of the tank or gas holder a.
Inasmuch as the generator c* is a duplicate of that c, reference will as far as is
practicable only be made to the generator c.
Within the generator c is provided a loose pot or basket d which is perforated
at d d for the purposes hereinafter described, and the basket d which is provided
with a handle d* is adapted to be withdrawn at the times desired to receive the
charge of calcium carbide, and then replaced in position in the generator, and in
order that the residue from the carbide may be readily removed from the pot or
basket d the latter is provided with a perforated tray furnished with handles d⭑
by the aid of which it may be readily lifted out of the pot d at the times
desired.
In practice two pots or baskets d would be employed in connection with each
generator, so that a clean dry pot would always be at hand in readiness to receive a
fresh charge of carbide.
The generator c is preferably arranged in an inclined position as shown, in order
that the contents may drain down to a point from which a pipe c² leads through a
mud box or trap 3 adapted to collect any residual carbide which may escape from
the pot d and the outlet from which is controlled by a cock whilst the inclined
arrangement of the generator also gives a better lead for the water fed to the
-carbide as hereinafter described.
The upper end of the generator c is adapted to be hermetically closed against
the pressure of the gas by means of a stopper or cover consisting of two dises e el
formed with bevelled edges between which is placed a disc of rubber e² provided
with an enlarged thickened rim or edge, and the discs e el are adapted to be forced
together by means of a hand nut e³ which screws upon the threaded upper end of
a spindle e the lower end of which is fixed with the disc el so that the thickened
edge or rim of the rubber disc e³ will be forced against and caused to embrace or
surround an annular rib or projection c¹ provided around the inside of the generator
at the mouth thereof, and in order to protect or insulate the stopper from the heat
generated by the carbide the underside of the stopper is covered or packed with a
suitable thickness e5 of asbestos or other non-conducting material.
In order to prevent the generator c becoming unduly heated it is surrounded by
a water jacket c the lower part of which is by a pipe c6 placed in communication
with the water in the tank a, whilst the upper part of the water jacket is similarly
by a pipe placed in communication with the displacement cistern b, and thus
the water in the jacket is more or less circulated or changed by the varying level
of the water hereinafter referred to.
The lower part of the generator c is placed in communication with the water in
the tank a by means of a pipe 2* which at one end connects with the pipe c and at
the other end opens into the tank a, where it is fitted with a non-return valve c²**
so that whilst water may be forced from the generator into the tank it cannot pass
by that way from the tank a into the generator.
The water necessary to moisten the charge of carbide within the pot or basket d4
issues from the nozzle f of a feed regulator which enters the upper part of the
generator c in a convenient position for the water issuing therefrom to filter through
the perforations d' of the pot or basket d, and thus reach the carbide in a subdivided
form, and this feed is controlled by a screw down valve f¹ so that the same may be
approximately regulated according to the number of lights in use and the volume
of gas required to be generated within a given time.
The feed nozzle f is connected by a pipe f2 descending nearly to the bottom of
the water tank or gas holder a with a vertical pipe f³ located within the tank a
so that the water within the tank or gas holder a when above the level of the upper
arm 2 of the pipe 2 connected with the feed nozzle f, and in the absence of any
controlling valve will flow by way of the pipes f2 f³ to the nozzle f and thus to the
carbide.

page_text: The upper part of the generator c is by pipes 9 g¹ placed in com-
munication with the upper part of the water and gas storage tank a
and the gas required for consumption by the burners is taken off
through 'the supply cock h, and thus as gas is generated it passes into the tank a,
and unless it is taken off by the supply cock in equal volume a pressure is created
within the tank a.
In order to automatically regulate the supply of water to the carbide and conse-
quently the volume of gas generated according to the consumption thereof, the
following arrangement of parts is employed:-
-
The displacement cistern b is as hereinbefore described placed in communication
with the lower part of the tank a by means of a vertical pipe 61 so that as the
volume and pressure of gas within the upper part of the tank a increase the water
within such tank a is gradually forced by way of the pipe 61 into the displacement
cistern b, and would upon displacing the water in the tank a below the level of the
upper arm f* of the water supply pipe 2 connected with the feed nozzle f cause
the flow of water through the nozzle f to the carbide to cease.
.
In order however to render the apparatus more perfect in its action the pipe f³ is
provided with a valve f¹ the spindle of which is of suitable section such as that
represented at Figure 5 to allow of the passage of the water, and this valve f4 is by
a chain for other flexible connection attached to a float fo which is provided with
eyes or rings f** working on vertical guide rods f7 furnished with collars or stops
at f* to limit the downward traverse of the float fe so that the position of the
valve will vary with the water level, and when the water in the tank a descends
below a given point the valve f4 will seat itself upon the upper end of and close the
pipe f³ thus imprisoning the water already in the pipe fand, if the valve f* be
arranged to act before the water falls below the upper arm f2* of the pipe f2, cutting
off the supply of water to the generator c:
L
The carbide is however more or less saturated with moisture, and will therefore
continue for a short time to generate gas, and in order to deprive the carbide of free
moisture the following device is employed."
The pipes g g are connected by a valve box in which works a valve g³ which
seats upon the upper part of the tube gl and this valve g³ is furnished with a
rod g which normally rests upon the top of the float fe so that when the pressure of the
gas within the tank a is insufficient to displace the water below a given level the
valve g³ will be held open, and gas will be freely admitted to the tank a, and thus
the greater part of the gas generated after the water supply to the carbide ceases
will pass to the tank a by the pipes g g¹.
When however owing to the displacement of water from the tank a the float fo
descends further than is actually necessary to close the valve f, such further descent
will permit the gas valve g³ to close upon its seat, thereby cutting off the supply
of gas to the, tank a and any further gas generated within the generator c being
unable to escape by any other channel, will force its way into the tank a through
the pipes c² 2* and non-return valve 2** which in practice should be lighter than
the valve f carrying before it any free water which may be within the generator;
and thus substantially arresting the generation of the gas, whilst should a small
volume of gas be further generated by the moisture contained in the carbide, it will
simply find its way in the same manner into the tank a and serve to supplement the
store of gas and possibly further slightly displace the water therein.
The gas which it is assumed continues to be taken off at the supply cock his
gradually consumed, thus reducing the pressure within the tank a and permitting.
the water to return from the displacement tank b, until in the rise of the float f6 the
gas valve g³ and the water valve ft are opened, when the water rising above the
upper arm f2* of the water supply pipe f2 will again flow through the pipes f2 f³ to
the feed nozzle f and the above operation will be repeated.
From the foregoing description it will be understood that the flow of water to
the carbide will cease when the water in the tank a falls to or below the level of the
upper arm f2* of the pipe f and that the water valve ft may be arranged to close

page_text: the pipe 3 either before, after, or at the same time that the water falls to such level or
thereabout.
In starting the apparatus the tank a is completely filled with water through the
service pipe 62 and ball valve 63 and the water is by such valve afterwards main-
tained at that minimum level in the displacement cistern b and consequently in
the absence of gas pressure rises to a corresponding level in the fitting of the gas
valve and there might therefore be a tendency for a small quantity of water to
lodge in the way through. the valve fitting h' which connects with the upper part of
the tank a, but in order to obviate this difficulty such way is by a pipe 2 placed in
communication with the pipe gl and thus the pressure being equalised there is no
tendency for water to remain lodged in these ways.
The air displaced by the water upon the first filling of the tank a is when the
valve g³ is lifted by the air or by hand allowed to escape by an outlet from the valve
box g² normally closed by a screw plug g* and the air displaced by the gas in the
generator c is similarly allowed to escape by a spring inwardly opening relief valve 95
in the pipe g.
The spring relief or snifting valve g5 also has for its object to prevent by the cool-
ing of the generator c the formation within the same of a vacuum of any intensity
should the regulating gas and water valves f* and g* be closed before the charge
of carbide is exhausted and which vacuum would prevent the water being drained
from the generator, or would hinder or prevent the removal of the stopper
or cover e and would be otherwise objectionable.
.. The gas drawn off at the supply cock h is conducted by a pipe ³ into a purifier
or drying chamber h4 filled with lime or other suitable material whence it passes
away by the service pipe h³ to the burners, and in order to prevent any free moisture
passing by the pipe 3 into the purifier, a trap he is interposed between the pipe h³
and the purifier h and fitted with a draw off cock h'.
The general level of the water and consequently of the gas within the tank a is
indicated by means of a guage i, which by its lower end is placed in communication
with the water in the tank, and by its upper end in communication through the
fitting of the valve h with the gas in the upper part of the tank a.
By the arrangement of parts hereinbefore described the volume of gas stored in
the tank a is governed by the capacity of the tank above the upper arm f2* of the
water supply pipe for by the distance between the valve f* and its seat on the
pipe according to the arrangement of the valve with relation to the upper
arm f* of the pipe f in the normal or highest position of the float f6 and these
parts may be so adjusted that the volume of stored gas is exceedingly small and
the pressure thereof under normal conditions does not exceed that of a six inch
column of water or thereabout.
It is desirable to give an audible indication when the charge of carbide requires
to be renewed, and which condition by the absence of gas pressure permits the
water within the tank a to rise above the normal working level, and for this purpose
and as indicated more particularly at Figures 6 and 7, a pipe j is employed which
is at both ends open to the interior of the tank a, and this pipe at a given point is
fitted with a terminal j¹ insulated from the pipe and provided with a projection
or contact maker which enters the pipe j but without contact therewith, and the
terminal is by a conductor 3 fitted with a switch 3* placed in communication
with an electric battery j of any suitable construction, which is by a conductor jo
placed in communication with a terminal electrically connected with the lower
part of the tank a, whilst a bell is placed in the electric circuit, and thus upon
the reduction of the gas pressure and the consequent rise of the water in the tank a
to a given level namely, that of the projection or contact 2 of the terminal j¹ the
circuit will be completed by the water and the bell will give an audible indication
that the supply of carbide is exhausted.
The pipe supplying water to the carbide, and the pipe 9 supplying gas to the
tank a are respectively provided with cut off or regulating valves f*g* and these
valves are adapted to be operated by means of levers f*19* which are coupled by a

page_text: .
bar g*, which also couples theni with the corresponding levers of the generator c*
and these valves f*g* are so arranged that in the vertical position of the lever g*1
the whole of the valves f* g* in both generators will be closed, whilst in the position
of the lever g* indicated by the dotted lines in Figure 3, the valves of the generator c
will be opened and those of the generator c* will be closed, whilst in the other
extreme position of the lever 9*1 the valves f*g* of the generator c.will be closed
and the corresponding valves of the generator will be opened, and thus upon the
carbide supply in one of the generators becoming exhausted which would be in-
dicated by the alarm bell., the position of the lever g*1 may be reversed, thus
throwing the other generator into action, and enabling that thrown out of action
to be re-charged.
In the example given at Figures 12 to 15 is represented a form of valve that it is
preferred to employ for the gas valves f* g* and h, and which consists of a barrel k
transversely. divided by a web or diaphragm and provided with ways ² which
register with corresponding ways formed in a rubber washer or seat upon which
is seated a porcelain or glass disc provided with similar ways 6, and secured in a
cap or holder provided with an arched way / communicating with the ways ke
The disc is kept up to its work by means of spring washers 10 held in place by
a plug screwing into the box k whilst the spindle of the cap or holder of the
porcelain or glass disc 5 is provided with a square adapted to receive a key cr
lever by means of which the cap and disc may be rotated to throw the ways k
more or less into or out of alignment with the ways k of the rubber disc k³.
In the example given at Figures 16 and 17 is shown the feed regulating device
that it is preferred to employ for supplying water to the carbide in the generator,
and which consists of a screw down valve fi from which the water passes through a
spout projecting into a chamber formed by a cylinder of glass f** made gas and
water tight in a suitable frame or holder and terminating in a spout or nozzle f
which delivers the water into the generator as hereinbefore described.
This device possesses the advantage that the stream of water passing the cock fl
can be seen and therefore more readily regulated than when an ordinary cock or
valve admitting water directly to the spout or nozzle f is employed.
The generators ce* are herein before shown and described as attached to the
tank a, but it will be understood that they might be separate therefrom and placed
at a distance in any other suitable position, and that a number or battery of
generators might be coupled with a single water tank.
Although the action of the various parts of the apparatus is hereinbefore
separately described we will, for the sake of clearness, now proceed to describe the
operation of the apparatus as a whole.
All the regulating cocks or valves f* and g* are turned off by placing the lever g*1
in a vertical position, the supply cock h is closed, and water is admitted by the ball
valve 63 to the displacement cistern b, and flows by the pipe b¹ into the tank a and
continues to flow until the ball valve 63 by the rise of the water in the displacement
cistern 6 is closed, and during this filling operation the screw stopper g* of the
valve box gå is removed and the valve g³ is lifted by the air or by hand in order to
allow the contained air to escape from the tank a, after which the screw stopper 3*
is replaced.
The feed water regulators f¹ are approximately adjusted to supply the required
volume of water to the carbide and charges of calcium carbide are placed
in the pots or baskets d which should be perfectly clean and dry the latter are then
introduced into the generators c c* and the covers or stoppers e are inserted and
screwed up.
The lever g✶ is then pulled over to the right, thus opening the water and gas
cocks or valves f* and * and putting the generator c in action, and at the same
time the snifting or relief valve g is opened to allow the contained air to escape from
the generator c after which it is closed and the gas generated passes by the pipes g g¹
to the tank a and may be taken off through the supply cock h to the burners.

page_text: So long as the gas is consumed in volume equal to that in which it is generated,
water will flow by the pipes f3f2 and feed regulator f¹ into the generator c but upon
the consumption of gas lessening or ceasing the volume of gas within the tank a will
increase, thus displacing some of the water and forcing it into the displacement
tank b, when upon the water in the tank a falling below the level of the upper
arm f* of the supply pipe fit will cease to flow to the carbide, and at about the
same time by, the descent of the float f the water valve f* will close the end of the
water supply pipe f³ or if the float valve f* be timed to close before the water falls
below the upper arm f2* of the pipe f2 it will cut off the supply of water to the
carbide.
By reason of the wet condition of the carbide the generation of gas continues and
the level of the water in the tank a is still further lowered so that the gas valve g³
cuts off the supply of gas from the generator e to the tank a, whereupon the gas
further generated forces out any free water through the pipe c2* and non-return
valve into the tank a whilst the small quantity of gas still further generated by
reason of the damp state of the carbide passes by the same channel into the water
tank a.
The generation of ga's now practically ceases until by the consumption of that
which is stored in the tank a water is permitted to flow from the displacement
cistern into the water tank a, when the float f6 will first open the gas valve g³ and
then the water valve f, and the above described operations will be repeated until
the charge of carbide is exhausted and the bell 5 sounds an alarm when by turning
the lever g to its opposite extreme position the generator c will be thrown out of
action, and that c* will be put in action.
In practice when the supply of water to the carbide and consequent generation of
gas is properly adjusted to the consumption thereof, the variation of the water level
in the tank a is but trifling.
The water valve ft may if desired be dispensed with, whilst retaining the float fo
and gas valve g³ whilst where only the simple regulation of the water supply to the
carbide is required, both of the float actuated valves f* and g³ and the water pipe c2*
may be dispensed with, but such modified arrangements would not be so perfect in
their action as the complete apparatus hereinbefore shown and described.
Having now particularly described and ascertained the nature of our said inven-
tion; and in what manner the same is to be performed, we declare that what we
claim is
1. An acetylene gas apparatus comprising a combined water tank and gas holder,
a gas generator, a displacement cistern placed at a suitable elevation and connected
with the lower part of the water tank, a water pipe rising vertically therein and by a
branch rising from the lower part of said vertical pipe connecting the water tank
with the upper part of the generator to supply water to the carbide, a gas pipe con-
necting the upper part of the generator with the upper part of the water tank to
conduct the gas into the latter, and suitable valves controlled by a float within the
water tank for closing the pipe supplying water to the carbide and the pipe supply-
ing gas to the water tank, and a water pipe fitted with a non return valve con-
necting the lower part of the generator with the lower part of the water tank for
the passage of free water driven out of the generator by the gas and of any further
gas generated after the closing of the said gas and water valves substantially as
herein shown and described and for the purpose stated.
2. An acetylene gas apparatus comprising a combined water tank and gas holder,
a generator, a displacement cistern placed at a suitable elevation and connected
with the lower part of the water tank, a water pipe rising vertically in the water
tank and by a branch rising from the lower part of the vertical pipe connecting the
water tank with the upper part of the generator to supply water to the carbide, a
gas pipe connecting the upper part of the generator with the upper part of the tank
to conduct the gas into the latter, a float within the water tank, a valve actuated by
the float for closing the gas supply pipe from the generator, and a water pipe fitted

page_text: with a non return valve connecting the lower part of the generator with the water
tank substantially as herein shown and described and for the purpose stated.
3. An acetylene gas apparatus comprising a combined water tank and gas holder,
a displacement cistern connected at its lower part with the lower part of the water
tank, a gas generator, a water pipe connecting the water tank with the upper part
of the generator, a gas pipe connecting the upper part of the generator with the
upper part of the water tank, a float within the water tank, a valve attached to the
float by a flexible connection for closing the water supply pipe to the generator, a
valve provided with a rod normally resting upon the float for closing the gas supply
pipe from the generator to the water tank, and a water pipe fitted with a non return
valve connecting the lower part of the generator with the water tank substantially
as herein shown and described and for the purpose stated.
4. An acetylene gas apparatus comprising a water tank, a displacement cistern,
a generator at its upper end connected by pipes or conduits with the upper and lower
ends of the water tank, and valves actuated by a float within the tank for closing
or opening said pipes according to the level of the water in said tank and means
for relieving the gas pressure in the generator substantial as herein shown and
described and for the purpose stated.
5. An acetylene gas apparatus comprising a water tank, a displacement cistern, a
generator, and gas and water pipes connecting the upper part of the generator with
the water tank, substantially as herein shown and described.
6. An acetylene gas apparatus of the character referred to in the preceding claims
comprising a water tank, a displacement cistern, two generators, a single set of float
actuated valves for cutting off the water supply to the generators and the gas supply
from the generators to the water tank and suitable cocks controlling the said water
and gas supply pipes coupled in such manner that when one generator is in action
the other is thrown out of action, whilst both may be thrown out of action sub-
stantially as herein shown and described and for the purpose stated.
7. An acetylene gas apparatus comprising a generator supplied with water at its
upper part, and connected at its lower part with a water tank by a pipe fitted with a
non-return valve so that upon the gas pressure within the generator exceeding a
given limit the free water will be driven from the generator into the tank, sub-
stantially as hercin shown and described and for the purpose stated.
8. An acetylene gas generator furnished with a gas tight stopper or cover and
provided with a loose pot or basket to contain the carbide so that the pot may be
readily removed from the generator and the spent or residual carbide from the pot
or basket substantially as herein shown and described.
9. An acetylene gas apparatus constructed and operating in manner substantially
as herein shown and described.
Dated the 1
בד
1007
WHITE & WOODINGTON,
27, Southampton Buildings, London, Agents.