Process and Apparatus for Automatically Indicating, Recording, and Regulating, in a controlled Manner, the percentage Volume of a Particular Kind of Gas in a Gaseous Mixture.
Year: 1896

page_text: Date of Application, 5th Dec., 1896
Complete Specification Left, 29th Sept., 1897-Accepted 4th Dec., 1897.
0
Process and Apparatus for Automatically Indicating, Recording,
and Regulating, in a controlled Manner, the percentage Volume
of a Particular Kind of Gas in a Gaseous Mixture.
I, MAX ARNDT of Monheimsallee, Aachen, Germany, Engineer, do hereby declare
the nature of this invention to be as follows:-
In this invention the gaseous mixture, say for example, furnace gas the quantity
of carbonic acid in which it is desired to ascertain, is pumped by means of a gas
pump through a flexible tube into a gas vessel until by lever mechanism operated by
means of a cam or the like provided on a toothed wheel driven from the same driving
pulley as the pump one end of each of two levers of the lever mechanism is pressed
the one against the flexible tube leading to the gas vessel on the one hand and the
other against another flexible tube leading from it, so as to stop the passage of the
gas which is now enclosed in the gas vessel. A second toothed wheel, smaller than
that above referred and on the same shaft, comes into gear with a sliding rack in
connection with a rod to which is attached a valve and underneath said valve an absorb-
ing body. The rack lifts the valve and with it the absorbing body out of an
absorbing medium contained in a vessel placed underneath the gas vessel and close-
able by the valve. The absorbing body now brought into the gas vessel absorbs the
carbonic acid of the furnace gas. In this operation when the rack lifting the absorb-
ing body into the gas vessel, has reached a suitable height, a pawl springs into a
notch in the back of the rack and holds the absorbing body suspended in the gas
vessel until released, whereupon the valve rod, the valve, and the absorbing body
again descend, the latter into the absorbing medium and the valve to shut off com-
munication with the gas vessel. A vertically moving measuring or indicating vessel
serving as a vacuum meter is in connection, through a graduated bell shaped receiver
both with the gas vessel and the gas supply tube. The indicating vessel is supplied
with a liquid into which the receiver dips. During the absorbing process taking
place in the gas vessel a liquid column, corresponding to the attenuation of the gas,
and therewith a float, rises in the receiver. The float within the receiver is in con-
nection through a wire with an electric contact which then also rises. A little
previous to this a lug provided on the larger of the two aforesaid toothed wheels
strikes against and to operates a lever as to close an electric circuit thereby giving
electric current to two electro magnets which then attract the armature of an
oscillating lever the other end of this lever then operating to couple a pulley to the
shaft from which the aforesaid toothed wheels are driven. The pulley winds up a
cord attached to the vertically moveable indicating vessel and raises this until the
level of the liquid therein comes to zero of the graduations or scale marked on the
fixed receiver. A second float in the indicating vessel just outside the receiver then
also rises together with the float within the receiver and also having a contact in
connection with it. The indicating vessel is in connection with a recording
mechanism by means of a cord attached by one end to the vessel and passing thence
over a pulley, on the shaft of which is a pinion gearing with, and in the rising and
falling of the vessel, actuating the toothed segment end of an oscillating lever the

page_text: other end of which carries a marking stud and an armature. In this way the
indicating vessel through its cord sets the recording mechanism in action. Adjacent
to the marking stud is mounted a rotary recording drum and when a recording
operation is to be performed the armature of the oscillating lever is attracted by two
electro inagnets located below it, the inarking stud then marking upon the drum its
position at the time. To the armatured oscillating lever is jointed a rod which in
the marking movement of the stud is pushed upwards and by it one spring contact is
slid over another. Now so soon as the liquid in the indicating vessel has brought
the gas in the gas vessel to the atmospheric pressure the surface of the liquid in
the receiver is the same as that in the indicating vessel so that the float outside the
receiver brings its contact against that of the float inside the receiver and closes the
circuit. This gives current to an electro magnet which in attracting an armature
disconnects from the conductor the rod jointed to the said armatured oscillating
lever whereupon the free end of the conductor is pushed by spring on to an
insulating piece. In this way the circuit is broken and the coupling of the pulley
on which the cord connecting it with the indicating vessel, is wound, is disconnected
and said vessel ceases to rise. At the same moment however that the circuit is
broken by the rod jointed- to the armatured oscillating marking lever, the spring
contact attached to the same is brought into contact with another conductor and
simultaneously therewith the circuit in which the magnets corresponding to the
armatured lever are placed is closed, the armature of said lever attracted and the
marking stud thereby caused to mark upon the recording drum the position corre-
sponding to the height of the indicating vessel and consequently the contents of the
carbonic acid in the furnace gas and also corresponding to the height of the two floats
or the contacts of the same. So soon as the circuit is broken by the separation of the
two contact springs in connection with the armatured lever the recording mechanism,
comprising the armatured lever, pulley and gearing in connection therewith, the
indicating vessel, and a swinging body or armature hereinafter referred to suspended
from the segment end of the oscillating armatured lever, returns to its original
position the marking stud then standing at zero. The gas remaining in the gas
vessel is then withdrawn whereupon a fresh operation may be performed.
The process and the apparatus employed therein are particularly adapted for
controlling the furnaces of steam generators through mechanism in connection there-
with for operating the dampers or other regulating parts of the same, for instance
the damper can be connected through a chain and pulley with a winding drum
furnished with a toothed wheel actuated in either direction, that is to say either for
raising or lowering the damper, by a screw upon a shaft one end of which is pro-
vided with a bevel toothed wheel. This wheel is turned by corresponding wheels
one on each hand, either in the one or the other direction according as a lever is
attracted through its armature to set in gear the right or left hand wheel with the
driving shaft of the winding drum. The armature may be attracted on either side
by an electro magnet, each of which receives current from a separate conductor. The
swinging body or armature above referred to is suspended in front of a magnet which
is in connection with magnets on the armatured oscillating lever and when these
latter receive current so does also the former which then attracts the swinging body
so as either to close the circuit of one of the two magnets for operating the damper
in one or the other direction or said swinging body when attracted comes against an
insulating part when no current will pass to. either of the damper actuating inagnets.
In this position of the swinging body and the damper the furnace gas would have
precisely the quantity of carbonic acid desired and when this quantity varies as being
too much or too little the swinging body is raised or lowered so as to close the
corresponding electric circuit for energising the one or the other of the damper
actuating magnets.
CAPITAINE & VON HERTLING,
89 Chancery Lane, London, W.C. Agents for the Applicant.

page_text: Process and Apparatus for Automatically Indicating, Recording,
and Regulating, in a Controlled Manner, the percentage Volume"
of a Particular Kind of Gas in a Gaseous Mixture.
I, MAX ARNDT of Monheimsallee, Anchen, Germany, 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 process of this invention has for object to automatically indicate and record
the percentage volume of a particular gas in a gaseous mixture by conducting this
latter through a suitable absorbing apparatus the working of which as also that of
the recording apparatus is controlled in the manner that the gas vessel is first
charged with the gaseous mixture and then shut off, the separation of the gas the
quantity of which it is desired to ascertain being accomplished by means of a
chemical absorbing medium, that after the completion of the absorption the
attenuation of the gaseous mixture corresponding to the percentage volume of the
separated gas is indicated and recorded, an electric current distributing mechanisin
being actuated so that the current, upon alterations taking place in the percentage
voluine of the particular gas correspondingly influencing further working parts, and finally
that the inlet and outlet apertures of the gas vessel are again opened for the
purpose of recharging it with fresh gaseous mixture and repeating the operations.
In carrying out the process, any suitable absorbing apparatus and controlling
mechanisms of different constructions may be employed.
In the accompanying drawing Fig. 1 shews by way of example, and diagrammatically,
an apparatus suitable for carrying out the invention.
The particular absorbing apparatus here employed comprises the gas vessel a,
the vessel 6 containing the absorbing medium i and the valve like closure c for
separating the two vessels gas tight from one another, said valve carrying an
absorbing body h and having its rod e shut off airtight by means of a rubber tube
which stretches when drawn up. The gaseous mixture enters the gas vessel a in
the direction of the arrows 1, 2, or inversely.
is a pump for drawing in the gaseous mixture through the flexible tube 3, said
pump, by way of example consisting simply of a hollow piston 4 dipping into
liquid in the cylinder 6 and in communication with two tubular extensions 7, 8.
To the former is attached the flexible tube 3 and to the latter a similar tube 9.
In these tubes are interposed simple india rubber lip valves 10, 11, the former being
a suction and the latter a delivery valve. The piston 4 is weighted with a
weight 12 and is raised and lowered in any suitable way, for example, from a
crank 16 through a rope 15 carried over pulleys 13, 14. The tube 9 is attached to
the inlet 17 and the tube 18, which conducts the gas out of the apparatus, to the
outlet of the gas vessel.
is a measuring or receiver tube which dips into the liquid o of the indicating
vessel m and is furnished with a scale n with divisions marked so as to indicate a
certain per centage proportion of the contents of the gas vessel a.
The indicating vessel m is movable vertically and is guided by the spindle 19
shewn broken away, and can be lifted up by means of a rope 22 working over a
pulley 20 and loaded with a weight 21.
23, 24, are two floats attached to light wires 25, 26, sliding vertically in guide
bearings 27, 28, float 23 occupying a position in the liquid o in the middle of the
receiver and float 24 being always outside the receiver.
The wires 25, 26, carry at top electric contacts 29, 30, and these latter, electric
conductors 31, 32, of light thin wire, easily movable and swinging with said contacts,

page_text: Conductor 31 is in direct connection with the battery k and conductor 32, on the
other hand, in connection with said battery through electro magnet 33 and
conductor 34.
37 is a cord attached at one end to the vessel m, passing over the pulley 36 and
at the other end held taut by a weight 35. Said cord serves to actuate the
recording mechanism p in conformity with the vertical movements of the vessel m..
For this purpose there is provided on the spindle of the pulley 36 a toothed wheel 38
engaging in the toothed sector 38 of the recording part 40 which turns on the
stud 39, said part 40 having at its opposite end a recording lever 41 guided between
shoulders 42 and carrying an armature 43, by means of which it, at the time of
recording is attracted by two electro magnets 44 located underneath it, in order that
the marking or striking stud 45 shall mark its position at the time upon the
rotating paper strip 46.
The weights 21, 35, are prevented from oscillating laterally by suitable means, for
example by vertically guided rods 21, 35, shewn broken away.
q is an electric current distributing mechanisin which can be connected with the
recording mechanism for the purpose of influencing by means of an electric current
additional working parts having for special object to change or regalate to the
desired extent the percentage volume contents of a particular gas in the gaseous
mixture.
The current distributing mechanism comprises the swinging body 47 which
accompanies the oscillating movements of the recording mechanisin, the electro.
magnet 50, the three conducting parts 51, 52, 53, and the insulator 54.
The electro-magnet 50 is on the one hand, through the conductor 55, the bobbins
of the magnet 44, and the conductor 56, in connection with the contact springs 57,
and on the other hand through conductors 58, 59, with the battery k. A conductor 60
connects with conductor 51; a conductor 61 with conductor 52; and a conductor 62
with conductor 53. Therefore when the recording magnets 44 receive electric
current, the same also passes through the magnet 50 whereupon this latter attracts
the swinging body 47, and its parts 48, 49, then close the electric circuit between
the conductor 51 and one or the other of conductors 52, 53, according to the height
at which the swinging body 47 stands, but if its part 48 comes in front of the
insulator 54, that is, when the gaseous mixture in the vessel a contains the desired
quantity of the particular gas, the closure of the circuit through part 48 does not.
take place.
The conductor 60 connects the battery 63 with the electro magnets 64, 65, of a
reversible mechanism, for example, an electrically reversible winding drum (Fig. 3)
having for object, when it is desired to regulate the smoke gases of a furnace by the
apparatus of Fig. 1, do govern the supply of air to the fuel to the required extent by
actuating the damper 76 placed in the smoke flue 77 (Fig 3).
In this case the gas of which it is desired to ascertain the percentage volume in
the smoke gases, is carbonic acid.
It is known that the useful effect of a furnace in respect of the utilisation of the
fuel, increases with the increase up to certain limits. of carbonic acid in the evolved
smoke gas, said increase taking place when the injurious excess supply of air to the
fuel is diminished, therefore by the process of this invention performed with the
apparatus of Fig. 1 by way of example in conjunction with the mechanism' of Fig. 3
the fuel is expended as economically as practicable by means of a proper regulation
of the supply of air thereto. Said limits are approximately 12 to 14 per cent for
ordinary grate furnaces and 18 per cent for regenerator furnaces.
For this purpose the electro magnet 64 (Fig 3) is connected with the
conductor 53 (Fig 1) through conductor 62, and magnet 65 with the conductor 52
through conductor 61.
The shaft 66 (Fig. 3) is continuously driven in any suitable manner, for example
from a rope pulley 67, and on said shaft are two lodse bevel toothed wheels 68, 69,
and also sliding along a feather the clutch coupling 81 which is actuated by the
lever 80 oscillating between the magnets 64, 65.

page_text: The side of the wheels 68, 69, coming opposite the coupling 81 is correspondingly
toothed to engage with the latter, and between said wheels and gearing with them
is a third bevel wheel 70 fixed on the shaft 71 the three wheels forming a changeable
driving gearing. There is further on the shaft 71 a screw or worm 72 which engages
the toothed edge 73 of a winding drum 74 over which passes a rope 75 to the other
end of which is attached a damper 76, or the winding drum can be connected with
any other suitable device for regulating the passage of air to the furnace.
The uppermost position of the conductor 53 of the current distributing mechanism q
(Fig. 1) corresponds to that of the part 48 of the swinging body 47, when the air
supply is excessive, and the like position of the conductor 52 to a too small air
supply to the furnace.
When the shaft 66 (Fig. 3) is caused to rotate in the direction shewn by the
arrow and with the gas vessel a (Fig. 1) charged with smoke gas containing, for
instance, 16 per cent of carbonic acid, that is, with a too small supply of air to the
furnace, the electric circuit 47, 49, 51, 60, 63, 60, 65, 61, 52 and 48 is closed by the
swinging body 47 when the current distributing mechanista q is in operation, and
the operating lever 80 attracted by the electro magnet 65 (Fig. 3), the coupling 81
being thereby moved intó engagement with the bevel wheel 68, the winding drum 74
turned in the direction shewn by the arrow, through wheel 70 and screw 72 and
the damper 76 moved into a more open position to permit an increased supply of
air to the furnace.
If, on the other hand, the air supply is too large, for instance, when the smoke gas in
the vessel a contains only about say 7 per cent of carbonic acid, the contact part 48 of
swinging body 47 will, in the recording of these contents, come in front of the
conductor 53 so that the circuit 47, 49. 51, 60, 63, 60, 64, 62, 53, and 48, will be
closed and the magnet 64 (Fig. 3) will move the coupling 81 into engagement with
the wheel 69, the winding drum 74 then turning in the opposite direction and moving
the damper 76 into a more closed position.
When the circuit is not closed, the lever 80 and the coupling 81 are in their middle
position.
When the current distributing mechanism g is dispensed with, the conductor 55
of the recording apparatus p is connected direct with the conductor 59.
r is a circuit breaking device arranged on the part 40 turning on the stud 39 of
the recording lever 41. This device comprises a rod 83 turning on pin 82 and
attached to spring 84; contact 85 and insulator 87; spring contact 57 fixed on a
second insulator 88; conductor 86; electro magnet 33; conductor 93 with spring
sliding contact 92; and conductor 89 connected to a spring 89" and sliding in the
guides 89b and moved by the rod 83 which accompanies the recording lever 41 in its
upward movement, said conductor 89 carrying a second conductor 90 with the sliding
spring contact 91, which two parts follow the movements of the conductor 89. Upon
the ascent of the recording lever 41 the rod 83 is connected as a conductor in the
conductor 89 but when the circuit in the magnet 33 is closed said rod is thrown
out of circuit and the conductor 89 thereby slid upon the insulator 87 by the
spring 89,
The magnet 33 and the conductor 89 are in connection with the battery k through
conductors 34, 94. Further the conductor 56 connects the spring contact 57 with
the electro magnets 44 of the recording apparatus p, and the conductor 100 connects
the conductor 86 with the electro magnets 99 of the disconnecting mechanism &
which, in addition to said magnets, comprises a disconnecting lever 101 connected to
a spring 101 and turning on pin 102, and a clutch coupling 103 placed adjacent
to a loose pulley 20 on the continuously rotating shaft 105 with which said coupling
rotates being slotted to slide over a feather on this shaft.
98 is a conductor connecting the magnets 99 with the contact lever 97 of the
circuit closer and breaker t.
Upon the disc u, driven by screw 106 engaging in toothed rim 107, there is a
lug 113which in striking a projection on the angle lever 97 turning on a pin 97* brings

page_text: this lever into contact with the conductor 96 which is mounted to turn on a pin 96
and is in connection with the battery k through conductor 95.
There is further provided on the disc a curved guide rail 114 for the gas closure
device which comprises the frictión or guide roller 116"; angle lever 116 turning
on pin 115 said roller being acted on from the rail 114; two tube pressing levers 119
turning on pins 119 and connected by rods 117, 118, to angle lever 116; spring 121;
and supports 120 for the two flexible tubes 9, 18.
On the shaft of the disc w is fixed a wheel 108 having, on a portion only of its
circumference, teeth which engage in the rack 109 when the absorbing body is to
be raised, to which end the plain end of the rack is formed with an arm 122 carrying
the rod e of the absorbing body.
112 is a spring pawl which when the last tooth of the wheel 108 leaves the
rack 109, springs into the notch 110 in the same and holds the absorbing body h
raised up until the disengaging stud 111 on the dise u releases said pawl. A suitable
brake such as 123 then acts to insure the gradual descent of the absorbing body h
into the absorbing medium i, or a second inversely arranged wheel 108 and a second
rack 109 may be employed to return the absorbing body.
124 is a pulley fixed on the shaft of the disc w for driving through bands 126 and
transmission mechanism w, the band pulley 127 of the recording drum 128.
The various described mechanisms operate as follows:-
The shaft 105 is rotated by any suitable means, for example, from a band or rope
pulley 104 and thereby also but considerably slower the disc u. The piston 4 of the
pump g presses the gaseous mixture which has been drawn into it, say the smoke gas
of a furnace, through the gas vessel a until the guide rail 114 comes against the
roller 116 whereby the lugs 119 are pressed down upon the flexible tubes 9, 18, and
these closed. The gaseous mixture is now shut up in the gas vessel which is shut off
from the outside, and the piston 4 moved further down into the liquid 5 but without
delivering gas. Simultaneously the wheel 108 engages the rack 100 and lifts the
absorbing body h, saturated or charged with the absolving medium i, slowly out of
the latter into the gas vessel a so that the gaseous mixture therein comes into contact
with the absorbing medium which takes up the gas to be separated, in this case
carbonic acid. When the absorbing body has been raised to the proper height it is
there held by the pawl 112, which for this purpose springs into the notch 110, until
the disengaging stud 111 releases it and permits it to descend and be shut off by the
valve c gas tight from the vessel a.
During the absorbing process, a liquid column corresponding to the attenuation of
the gas, rises in the receiver l, the float 23 with contact 29 rising at the same time.
In the same interval also the lug 113 on disc u will have come against the projection
on the circuit closing lever 97 to close the circuit 97, 96, 95, 94, 89, 83, 85, 86, 100,
99, 98, the electro magnets 99 then receiving current, attracting the armature of the
lever 101, this latter moving the coupling 103 into engagement with the pulley 201
to lift the indicating vessel m, the liquid in which, previous to the absorbing process,
had stood at zero on the scale n. With the vessel m the float 24 and contact 30 also
rise. In its ascent the vessel m sets in operation through cord 37 the 'recording
apparatus p, the rod 83 interposed in the conductor 89 then so displacing this latter.
that the spring contact 91 slides over the spring.contact 92. So soon as the liquid o
has again condensed the gas still remaining in the gas vessel a to the pressure of the
outer atmosphere the surfaces of the liquid in the receiver and in the indicating
vessel m stand at the same height so that the float 24 with its contact 30 closes the
circuit 29, 31, 34, 33, 32, 30, the magnet 33 then receiving current and by attracting
its armature 83, the rod 83 attached thereto, is withdrawn from the conductor 89,
the latter slid by spring 89 on to the insulator 87, the circuit 97, 96, 95, 94, 89, 83,
85, 86, 100, 99, 98, broken, and the coupling 103 disconnected from the pulley 20,
the indicating vessel m therefore no longer rising. At the same moment, the
circuit being broken through the disconnected rod 83, the spring contact 57 is
brought into contact with the conductor 93 and by the descent of the conductor 90
with the conductor 89 the spring 91 on said conductor 90 is brought into contact

page_text: with a spring 92 on the conductor 93. The circuit 91, 92, 93, 57, 56, 44, 5, 50, 58,
59, 94, 89, 90, is therefore closed, the electro magnets 44, attract the armature 43 of
the lever 41 the marking stud of which records upon the paper strip 46 the quantity
of carbonic acid in the smoke gas corresponding to the height of the two float
contacts 29, 30, and the swinging body 47 attracted by magnet 50 transmits, for
the purpose of reversing the winding drum (Fig. 3), the current in the manner
already described to one or the other, as desired, of the magnets 64, 65.
So soon as the spring contact 91 leaves the spring 92, the circuit is broken.
The recording apparatus p, the swinging body 47 and the indicating vessel m
return to their former positions corresponding to the zero position of the marking
stud 45, and the rod 83 again connects with the conductor 89.
There still remains in the receiver a liquid column held there by the attenuated
gas but which falls to zero on the scale n by reason of the equilibrium of pressure
brought about at the conclusion of the process by the curved rail 114 of the dise u
releasing the roller 116 when the angle lever 116 reopens the flexible tubes 9, 18.
The pump g then expels the residual gas, draws a fresh gaseous mixture into the gas
vessel a and the operations of the mechanisms and the process are then repeated in
the described manner.
Fig. 2 shews a modified form of apparatus in which the attenuation of the gas
produced by absorption or the percentage volume of a particular gas in the gaseous
mixture, may be measured direct by means of a vacuum gauge 129 in communication
with the gas vessel a through a connection 17, and in direct connection with a
recording apparatus.
On the pointer spindle of the vacuum gauge 129 is fixed a cord pulley 130.
A cord 131 passing over rollers 132 carries at one end a counterweight 133 and at
the other end a flat swinging body 134 guided in the frame 140 and having attached
to it a sleeve 135 in which a marking stud 136 is free to move properly guided. The
sleeve and marking stud are balanced and the swinging body caused to hang quite
vertically by means of a screw collar 147 adjustable on a screw projecting from the
lower end of the swinging body 134.
139 is a bracket fitted to slide in the frame 140 and guided therein by a bolt 141
145 is a lever mounted to oscillate in front of the frame and is provided with an
armature 146. 149 is an india rubber roller from which a paper strip 46 unwinds.
With a closed circuit the magnet 151 attracts the arinature 146 of the lever 145.
The latter then strikes the bolt 141 thereby moving through the bracket 139 the
marking stud 136 from its head 137, said stud then recording upon the paper strip 46
the position of the vacuum gauge pointer. Immediately thereon the circuit in
magnet 151 is again broken and the springs 142 bring the parts 139, 141, 145, and
the spring 138 the marking stud, into the state of rest position.
In this recording arrangement the magnet 151 is connected direct with the
conductors 95, 98, (Fig 1) communicating with the battery k. In this case also, the
circuit is closed and broken by the lug 113 on the disc u, but for the performance of
the process and in the recording apparatus, the disconnecting mechanism & with the
magnets 99, coupling 103, pulley 20, receiver, indicating vessel mi, as well as the
recording apparatus p and the circuit breaker or reverser T with the corresponding
conductors of the apparatus are dispensed with.
The current distributing mechanism q (Fig 1) for the regulation of the air supply
(Fig 3) may be applied and used with the apparatus of Fig. 2 simply by connecting
the swinging body 47 (Fig 1) with the swinging body 134 (Fig. 2).
With the apparatus may be combined electric signalling arrangements for
announcing particular properties of the gaseous mixture, for example when the fuel
receives insufficient air, the bell 152 in connection with the battery 63. through
conductors 47, 49, 51, 60, 154, 156, 52, 48, may ring, and when the air supply is too
large another bell 153 of different tone in connection with the battery 63 through
conductors 47, 49, 51, 60, 155, 157, 53, 48, may ring.
The process and the apparatus of this modification is more especially adapted for
controlling the furnaces of marine boilers as the smoke gas balances employed in

page_text: connection with stationary boiler installations cannot be used for that purpose owing
to the vibrations or shocks usual in ships.
The electric mechanisms of the apparatus may be wholly or partially replaced by
similarly acting pneumatic mechanisms.
Fig 4 shews a recording apparatus without any electric mechanism.
The indicating vessel m is connected with the receiver through a flexible tube o',
the latter as in Fig. 1, communicating with the gas vessel a of the absorbing
apparatus.
The crank K, driven in a controlled manner from the driving mechanism which
also actuates the other working parts of the absorbing apparatus, moves through
rod K and lever K as also through rod Z, the vertically guided indicating vessel m
into which dips the float S suspended from an angle lever S through a wire or thin
rod S¹. Said lever carries the marking stud St and turns on a pivot attached to the
sleeve S2 which slides on the guide $5 and is connected by arm Z2 and rod with
the rod Z. The sleeve S2 and the marking stud S therefore follow the vertical
movements of the vessel m.
The upward movement of the float S is so adjusted that by means of rod S¹ and
lever Sit lifts the marking stud S from the paper strip P unrolling from the
roller W, when the liquid O in the vessel m and receiver is at an equal level, that is
at zero of scale n.
L
When the gas to be measured has been absorbed out of the gaseous mixture in the
vessel a (Fig 1) the attenuation in this latter and also in the receiver draws up into
the latter a liquid column, the-liquid in the vessel m then correspondingly falling.
The float S also falls and the marking stud is pressed against the paper strip. If then
the vessel ne is lifted from the crank K the marking stud draws a line on the paper
strip until the vessel m has reached a height at which the liquid o is at the same
level in both and m, and the float S lifts the marking stud from the paper,
consequently the height of the drawn line corresponds to the percentage volume of
the absorbed gas.
Fig. 5 shews a modification of the recording apparatus in which the float S
actuating the marking stud of Fig. 4 is replaced by a cap T closed air and gus tight
by a yielding body, for instance a caoutchouc membrane M, and attached to the
vertically guided slide St moved from the crank K through roller K, projection K³,
rod K¹, lever K2 and rod Z. Said closed cap T is in communication with the
receiver through the flexible tube L so that when the gas is, in the absorbing
process, attenuated in the vessel a and receiver l, the depression extends to the cap T
and draws the membrane M inwards with the rod S¹ attached thereto, which in turn
is in connection, through lever S oscillating on an arm Z projecting from the
slide S2, with a marking stud or an ink pen S4 so that the latter is pressed against
the paper strip P, the pressure lasting until the surface of the liquid o in the vessel m,
which is attached to an extension of the slide S2, comes to the same level as the
surface of the liquid o in the receiver . At the same moment the rest of the analysed
gaseous mixture in the vessel a, the gas or air in the receiver l, and in the cap T is
exposed to the pressure of the outer atmosphere whereupon the membrane M returns
to its state of rest position and in so doing disengages the marking stud or pen from
the paper strip, so that also with this recording apparatus the height of the drawn
line corresponds to the percentage volume of the gas absorbed out of the gaseous
mixture.
The stroke of the slide S2 and pen or stud S is always equal to the distance between
the top and bottom lines of the paper strip. The latter is carried over the two
rollers W, W, mounted in the frame R of the recording apparatus removably
attached to the table C.
In the descent of the slide S2, an arm Z3 thereon comes against a roller mounted
on an angle lever Z which is in connection with a pawl 7 engaging in a ratchet
wheel fixed on the spindle of a spring weighted roller W. By means of this device
the paper strip is, after each recording operation, moved round frictionally by said
roller to a certain extent. The paper strip may be of any suitable length and may

page_text: wind off a roller placed behind roller W and on to a roller placed behind
roll W
The projection Ki is formed with an oblique edge in order that, after the lever K
turning on pivot K has completed its stroke, th roller K may in rolling over thë
same insure the slow descent of said lever until the rod K¹ takes upon the guide
bracket K whereupon the marking stud or pen again comes opposite the zero line of
the paper strip P.
To combine the electric current distributing mechanism 7 (Fig 3), serving for
regulating the percentage volume of a particular gas in a gaseous mixture, with the
recording apparatus of Fig 4 or Fig. 5, there is arranged on the slide St an arm q¹
carrying through rod q the swinging body 47.. Further, the receiver is in
connection through flexible tube L2 with the circuit closer and breaker 2 and through
tube L with a second cap T provided with a nembrane M" and actuating through
rod 83 a second circuit closer and breaker. This latter held down by a spring 20
slides at its ends on conductors 91, 92, and between these on an insulator 88.
The circuit closer 1 is an U shaped glass tube partly charged with quicksilver
and provided with contacts 3, 4, the former being connected with the battery k
through conductor 34, and the latter with the conductor 91 of the circuit closer
through conductor 93. The second conductor of said circuit closer is connected through
conductors 55, 56, with the magnet 50 from which the conductors 58, 59, lead back
to the battery k.
Conductor 51 is connected with the battery 63 and this through conductor 60 with
the electro magnets 64, 65, and of these the former through conductor
with conductor 53, and the latter through conductor 61 with the conductor 52.
When gas absorption or attenuation takes place in the gas vessel a, the same
extends to the cap T and circuit closer 2, the quicksilver column in the latter being,
drawn up and thus placing 3 out of contact. On the other hand the membranė Mi
is drawn inwards and brings the circuit closer into contact with the
conductors 91, 92. The vessel m is then raised, whereby the pressure in the vessel a,
receiver and cap T', is placed in equilibrium with the atmosphere. The quicksilver
column then falls correspondingly and again contacts with conductor 3, the circuit.
59, 58, 50, 55, 56, 92, r, 91, 93, 4, 5, 3, 34 and & then being closed, magnet 50
attracting the swinging body 47 and this latter closing either the second circuit
63, 60, 51, 49, 47, 48, 52, 61, 65, 63, 63, or the third circuit 63, 60, 51, 49, 47, 48,:
53, 62, 64, 60, 63, according to the height of said swinging body at equality of level
of the liquid in the receiver and vessel m, thus sending the current into the one or
the other of the magnets 64, 65, which may be placed at any suitable distance from
the current distributing mechanism q. Arranged between said magnets, and with the
closing of the circuit attracted by them to the one or the other side, is an oscillating
armature 80 carrying an actuating organ 81 which actuates further mechanism for
regulating the percentage volume of a gas in a gaseous mixture, for instance, damper
winding mechanism as in Fig 3.
Simultaneously with the equilibrium of pressure in a, I, and T the membrane M₁
returns to its former position and moves the contact part of the circuit closer on to
the insulator 88: The circuit is then broken in all parts of the regulating
apparatus q.
"If with the circuit closed in the magnet 50 the swinging body 47 comes against the
insulating part 54 with its contact part 48, the circuit is not closed in the magnets 641
or 65 and the armature 80 remains in its middle position, therefore by screwing the
swinging body up or down, or altering the height of the insulator 54 between the
conducting parts 52, 53, the composition of the gaseons mixture relatively to a
particular gas, may be varied.
The stroke of the vessel m is equal to the height of the lined portion of the paper
strip P, consequently after placing-the pressure of the gas residue in the vessel a in
equilibrium with the atmosphere, namely, after the recording or regulating
operation, said gas residue as well as the air or gas in the receiver l and cap or shallow
vessel T or T is, in the continued ascent of the vessel m, compressed, if the recorded
quantity of the absorbed gas is of less percentage volume than is comprised in the
B

page_text: lined portion of the paper strip. This compression however has no injurious effect
on the working of the apparatus because in such a case the membrane M or M' bulges
outwardly, the former disengaging the marking stud S and the latter the circuit
closer.
"Fig. 5 shews another modification in which is employed in recording and
regulating the quantity of a particular gas in a gaseous mixture, only one
membrane M stretched over the cap or shallow vessel T communicating through
flexible tube L' with the receiver / and attached to the slide stem 7 and taking part
in the movements of the vessel m. The marking stud or pen S is attached to the
rod S which here also is actuated by the membrane M as in Fig 4, and the angle
lever 83 and rod 83 actuates the circuit closer as in Fig. 5, the conducting
parts 91, 92, of which with insulating part 88 are in this case firmly connected to said
slide stem. The conductors 56 and 59 respectively in connection with the circuit
closer and the magnet 50 (Fig 5) here follow the movements of the circuit
closer
and
Fig. 5 shews a recording apparatus which differs from that of Fig. 1 in having
only one float S in the vessel m instead of two, for closing the circuit after the
completion of the absorbing process, said vessel m in this case communicating with
the receiver through flexible tube o. The frame R sliding in guides
carrying the vessel m and the vertically moving parts serving for the recording
operation further contains the insulating part 40 to which are attached the
conductors 29, 30, and contact spring and which is penetrated by, and serves as a
guide for, the thin float rod S¹. The electro magnet 33 on the frame R¹ is connected
through conductors 32, 34, respectively with the conducting parts 30, 34, the latter
attached to the insulator 34°. The double lever S3 carries at its upper end the
marking stud S and at bottom is hook shaped to engage with a projection on a rod Z
when this in the descent of the frame comes by its bottom end against the fixed
stop and is held in the raised position. Said rod 23 is normally pressed downwards
by a spring f and has connected to it an insulated spring contact 34b which is in
connection with the battery k through conductor 36 which takes part in the
noyements of the frame. The battery is also connected through conductor 39 with
the contact rail 37 attached to an insulator 38 fixed to one of the guides F of the
frame. The paper strip P unwinds from the roller W carried in the frame R.
In the position shewn of the recording apparatus, the liquid o is at the same level
in receiver and vessel m that is, at zero on the scale n. Although the rise of the
float S is so adjusted that with both liquid surfaces at the same level, the circuit
closer is in contact with the conductors 29, 30, still the circuit is not closed in
magnet 33, and no recording operation can as yet be performed because the spring
contact remains on the insulator 38.
If now gas absorption takes place in the gas vessel in connection with the
receiver, the liquid will rise in this latter in proportion as it falls in the vessel m
and the float S will also fall carrying with it and thereby disconnecting the circuit
closer ¹.
If now the framo Rand with it the recording apparatus is raised from the crank K,
the spring slides into contact with the rail 37 and the circuit 1, 30, 32, 33, 34,
34, 34, 36, 35, 4, 39, 37, 2, 29, r, thereby closed at the moment in which, after
completed absorption, both liquid surfaces stand at the same level by reason of the
ascent of the vessel m, and the circuit closer 1 again comes into contact with the
conductors 29, 30. At the same moment the lever S3 is attracted by the electro
magnet 33 and the stud S makes a mark upon the paper strip P. At the same time
the hook of the rod S3 disconnects from the rod 73, which is then pressed downward
by the spring f carrying with it the spring contact 34 on to the insulator 34 and
thus breaking the circuit so that only the percentage volume of the gas absorbed
from the gaseous mixture is recorded."
Fig. 6 shows a complete, mechanically driven, recording gas absorbing apparatus.
This apparatus may be driven continuously in any suitable manner, for example by
a wire V, lever u, spring pawl engaging in the ratchet wheel fixed on the

page_text: shaft u³, and a retaining pawl ub for preventing backward movement of the ratchet
wheel.
The crank pin e10 during the upward half of a revolution raises through the
forked rod es, the lever e oscillating on pin e, rod e', cross head e¹, hollow rod e, and
closure c, the latter serving to shut off the gas vessel a gas tight from the absorbing
medium and carrying the absorbing body h¹ which for the purpose of increasing the
absorbing surface is provided with an inner body h. The body h may also have an
extension 3 for intimately mixing up the absorbing medium i during the working of
the apparatus.
I is a filling tube with stopper I'
:
The gas vessel a is hermetically closed by a cover a and is provided with a gas
inlet 17 and means for holding the rod e packed gas tight.
The cross head e¹ is bored through rectangularly for the passage of the gas, coming
through the hollow rod c, to the suction tube II.
The extension e2 of the crosshead e¹ serves for guiding it, on the rod fixed in
stationary collars e and encircled by a spiral spring which presses against the
crosshead so that the closure c commences to fall when the crank pin 10 passes over
its highest position and is closed when the crank pin has gone through half a
revolution, after which the same moves freely in the fork ell of rod e8 until it comes
against this rod to again lift the lever e', thus the closure c with the absorbing body h
rises and falls once during half a revolution of the shaft u³.
g is a caoutchouc pump continuously operated through rod g', lever g³ turning on
pin g2, and rod g to draw the gases through the apparatus in the direction of the
arrows 1 to 9 and discharge them at 10, 11.
On the shaft u³ is fixed a cam u which operates the levers u, u, oscillating on
pin and actuating the rods us, u, against the resistance of springs f to press them
down. Each of said rods is provided with three tube pressing lugs p..
The gaseous mixture to be analysed, previously filtered, enters through flexible
tube A into the inlet tube H³. This latter dips into a liquid provided in the
container H2, by which means the gas ascending in the direction of the arrow 2 is
saturated with moisture, or may have been previously deprived of a particular gas,
sulphurous acid for instance, by a previous absorption of the same.
With the container He is combined a wadding holder H in which the gases are
again filtered in order to cleanse the gases and keep the apparatus as clean s
practicable. The holder H communicates with a two way tube H', one way
connecting with the gas tube I leading to the inlet 17 of the gas vessel a, and the
other way connecting with tube III leading to one of the two ways of a tube H5 the
shank of which is inserted in the discharge tube B. The other way of the branch
tube H connects with the suction discharge tube II leading to the crosshead e¹ and
following at this point the movements of the same. d is a globular vessel, made of
IV is a tube
thin elastic material such as caoutchouc, interposed in the tube II.
which connects the gas vessel inlet 17 with the receiver and tube V the latter
through a wadding filter V with the atmosphere. o' is a flexible tube connecting the
fixed receiver with the moving vessel m.
The apparatus works as follows:-During the time the friction rollers of
levers u, u, glide in the recessed part of cam u', the tubes I, II, V, are open, the
tubes III, IV, closed, and the pump g draws the gaseous mixture to be analysed in
the direction of arrows 1 to 4 into the gas vessel a which it completely fills, and
further draws off the excess gas in the direction of arrows 5 to 11.
So scon as the projecting part of cam u presses on the lever us the tubes I, II,
are shut off from the gas punip by two of the lugs p of rod u and on the other
hand the tube III is opened by the release of the other lug so that the pump instead
of drawing the gas through the gas vessel, draws it off in the direction of
the arrows 1, 2, 15, 9, 10, 11.
In the meanwhile the air pressure on the collapsible vessel d has removed the
depression previously present in the gascous mixture in consequence of the suction of

page_text: the pump g, that is, the gaseous mixture enclosed in the apparatus has been brought
to atmospheric pressure.
The cam u then presses down lever u to shut off from the vessel d the tube II
by a lug p of rod w, and to shut off from the atmosphere the tube V by another
lug p of the same rod, and on the other hand the tube IV is opened so as to provide
communication between the receiver 1 and gas vessel a.
This position of the apparatus in which the surfaces of the liquid columns o both
stand at zero on the scale na is shewn in Fig. 64 and the absorption of a particular
gas out of a gaseous mixture, for example carbonic acid out of smoke gas now
commences to which end the vessel bis, in this case, charged close up to the
closure c with potash lye.
The crank pin el raises through rod e, lever e', rod e, and rod e, the closure c
and absorbing bodies ,, into the gas vessel a so that the potash lye upon said
bodies absorbs the carbonic acid, and consequent upon the attenuation of the gas
thereby caused in the vessel a and also by reason of the air pressure on the liquid
in the vessel m, a liquid column o corresponding to said attenuation rises in the
receiver l.
When the crank pin has travelled. through about half a circle the closure c is, after
completion of the absorption again closed, the roller K of the recording crank K is also
turned to the position shewn in dotted lines underneath the frame K projecting from
the rod K', which latter has been resting upon its guide bearing K, and now raises
by means of the lever K oscillating on pin K, and rod Z, the slide S2 guided
vertically in a frame F.
To the slide stem is attached the vessel m and on an arm Z2 projecting from
the slide is mounted an angle lever S3 carrying the marking pen S. Said angle
lever is jointed to rod S¹ carrying at its lower end a float S the ascent of which is
so adjusted that it draws the pen S from the paper strip P when the liquid in
and m stands at the same level. On the other hand, with the liquid column falling
in m, therefore by reason of a lessened upward driving force, it presses the pen
against the paper and with a continued ascent of the slide $2 a line is drawn thereon
until the liquid columns in and m come to the, saine level, the gas residue in the
vessel a thereby also coming to atmospheric pressure, and the height of the drawn
vertical line corresponding to the percentage volume of carbonic acid in the smoke
gas.
Upon the descent of the slide, the arm Z strikes the upper roller of the angle
lever Z and this by its lower roller, and the rod Z7 influenced by spring f, and the
pawl mounted on said rod turns to a certain extent the ratchet wheel Zo and
therewith also the roller W which is held by springs to the roller W or paper
strip P so as to advance the latter sufficiently for the reception of the next following
recording line, the paper strip passing over the rollers W, W, and unwinding from
a roller placed behind the former and onto a roller placed behind the latter.
All the rollers with their operating mechanism are located in a frame R removably
attached to the support C so as to allow of the paper strip being readily removed
and replaced by a fresh strip when desired.
The oblique edge of the frame K serves the same purpose as that already described
with reference to the like projection of Fig 5.
The levers ', u', are then again lifted by the springs f to bear against the
recessed part of the cam and the tubes I, II, V, again opened through the
rods us, u, which also at the same time close the tubes III, IV, so that the pump g
fills the gas vessel a with a fresh gaseous mixture and the receiver is again shut
off from the same but communicates with the atmosphere, the liquid column in
again stands at zero on the scale n and the marking pen in front of zero on the paper
strip P. In this way the working of the apparatus is automatically repeated.
With the stem 2 of the slide S2 may be connected the swinging body 47 of the
electric mechanism q for regulating the quantity of a particular gas in the gaseous
mixture (Figs 1, 5).
Fig. 6 shews another arrangement for placing the gascous mixture in the vessel a

page_text: in equilibrium with the atmosphere, in which the collapsible vessel d (Fig. 6ª ) in the
the tube II is dispensed with."
With the tube I open and the tube III closed, the tube A in its extended form is
closed simultaneously with the tube II (Fig. 6 so that within the vessel a and the
container H (Fig 6) is enclosed a gas still remaining under the depression produced
by pumps g. In order to remove this depression, the holder H' is fitted with tubes
Ho, H, communicating with the filter V and the atmosphere. If now the tube VI
is opened for a moment by the release of a lug p of rod u, atmospheric air will flow
in the direction of the arrows 12, 13, 14, into the container H, and driving the gas
therein before it in the direction of arrows 2, 3, will bring the gaseous mixture in the
vessel a to atmospheric pressure. Thereupon the tubes I and VI are closed and on
the other hand the tubes A, H³, and III opened.
The pump g (Fig. 6) may be replaced by any other suitable suction apparatus, and
the gases may also be forced through the apparatus by any suitable means.
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. The method of and means for governing all the operations of a gas absorbing
apparatus in the manner that previous to each absorbing process in the gas vessel a a
certain volume of the gaseous mixture is drawn off and brought to the pressure of the
atmosphere, and that the controlled movements of an indicating vessel m
communicating through a liquid o with a receiver as well as the movements of the
liquid o itself caused partly by the gas absorption, partly by the travel of the vessel m,
may either be utilised for actuating a measuring and recording apparatus or a gaseous
mixture regulating apparatus, or for actuating both such apparatus simultaneously,
substantially as described and shewn.
2. For performing the operations referred to in claim 1 with reference to the
recording operation and to the means for performing the other functions of a gas
absorbing apparatus driven in a controlled manner, a mechanism for automatically
measuring and recording the percentage volume of a particular gas separated in each
completed absorbing process from a gaseous mixture, by which imechanism the
indicating vessel m which is in communication by means of the liquid o with the
receiver, is automatically raised when, consequent upon the attenuation of the gas
due to the absorbing process and of the pressure of the atmosphere, a column of liquid
coming from the vessel m and corresponding to the attenuation of the gas, has risen
in the receiver l, and by which mechanism the movements of the liquid o caused
partly by the gas absorption, partly by the ascent of the vessel m, as also by the
movements of the parts for raising the vessel m, are utilised for the purpose of
actuating the recording stud in the manner that the latter is either pressed against or
withdrawn from the recording paper strip when the vessel m is raised so high that the
surface of the liquid therein comes to the same level as that in the receiver therefore
also the gas residue enclosed in the vessel a of the absorbing apparatus again
comes to the pressure of the atmosphere and the percentage volume of the
absorbed gas can be read off from the scale n of the receiver l, whereupon the vessel m
after completion of its ascent, returns automatically to its lowest position, and
simultaneously therewith, the receiver is also shut off from the gas vessel a,
the latter now being charged with a fresh gaseous mixture and said receiver
placed in communication with the atmosphere, so that the water columns in the
receiver and vessel m again stand at zero on the scale n, substantially as
described and shewn.
3. For performing the operations referred to in claim 1 with reference to the
recording operation and to the means for performing the other functions of a gas
absorbing apparatus driven in a controlled manner, the combination with the
means for lifting the vessel m, of an electric circuit closing and current dis-
tributing mechanism which like the recording apparatus referred to in claim 2
is dependent upon the movements of said vessel and upon those of the liquid o

page_text: therein and in the receiver l, by which mechanism when after ench completed
absorption process during the controlled ascent of the vessel m the liquid columns of
in the latter and in the receiver & are again brought to the same level, an electric cirenit
is closed in any suitable manner, for example, by one or two floats located in the
liquid o (Figa 1, b) or by a pneumatic device, as for instance, an elastic membrane
M (Fig 5) actuated by the attenuation and condensation of the gas, a swinging body
47 (Figs 1, 5) following the movements of the vessel m or its lifting mechanism is
attracted by an electro magnet 50 thereby coming into contact with a conductor 51
and with one or the other of two conductors 52, 53, whereby a second or a third
circuit is closed and either one 65 or the other 64 of two electro magnets (Fig. 3)
receives current for the purpose by means of one of the same of actuating other
mechanisms which are influenced by changes in the percentage volume of a particular
gas in a gaseous mixture analysed in a controlled manner in the apparatus, or of
leaving said mechanisms at rest when the gaseous mixture contains the required
'quantity of the particular gas, as in this case the swinging body 47 with its contact
48.comes against an insulator 54 whereby an electric circuit is not closed,
substantially as described and shewn.
4. A. recording apparatus in which floats 23, 24, each provided with an electric
contact are arranged respectively in the receiver land vessel m for the purpose, when
the vessel m is raised and both liquid columns o are at the same level, of closing an
electric circuit whereby the recording apparatus is actuated and the recording stud or
'pen caused to follow proportionately and in a controlled manner the movements of
the vessel m, substantially as described with reference to Fig. 1 of the drawings.
5. A recording apparatus of the kind referred to in claim 2, in which the gas
vessl a or the receiver is in connection with a vacuum gauge which indicates the
gas attenuation, produced in the controlled absorption process, in percentage voluine
and correspondingly thereto actuates the recording stud or pen, substantially as
described with reference to Fig. 2 of the drawings.
6. A recording apparatus of the kind referred to in claim 2, in which a float S is
arranged in the vessel m which float, upon the ascent of said vessel after completion
of an absorption process, presses by its weight the recording or marking stud S
against the recording paper P until the surfaces of the liquid o in the receiver and
vessel m again come to the same level and then by its further ascent throws the
recording stud out of operation, substantially as described with reference to Fig. 4.
7. A recording mechanism of the kind referred to in claim 2, in which, for the .
purpose of actuating the recording stud or pen, is arranged an elastic orgun for
example, a membrane M the movements of which are transmitted in any suitable
manner to the recording pen S and which membrane is stretched over a cap or
shallow vessel T connected with the lifting mechanism of the reconding pen and
vessel ma and taking part in its movements, and having its interior in communication
with the receiver lor gas vessel «, so that the gas attenuation taking place in the
latter, upon the performance of an absorption process, extends to the cap T, and the
membrane M upon the ascent of the vessel me presses the recording pen against
the recording paper, on which a recording line is thereby drawn until the surfaces of the
liquid o in the receiver and vessel m again come to the same level whereupon, by
the gas residue being placed in equilibrium with the atmosphere, the membrane M
throws the recording pen out of operation and breaks off the recording operation,
substantially as described with reference to Fig. 5 of the drawings.
8. A recording mechanism of the kind referred to in claim 2, in which is arranged
in the vessel ma float S which is in connection with the electric circuit closer, this
latter, after completed absorption of a particular gas, coming into contact with two
conductors 29, 30, insulated from one another, so soon as upon the ascent of the
vessel m the surfaces of the liquid o in this and in the receiver again come to the
same level, whereby an electric circuit is closed which energises the magnet 33 so that
this attracts the recording lever S3, and the recording stud S thereby moved against
the recording paper 1', the electric circuit however being then immediately broken.
and therewith also the recording operation broken off by the disconnection of a hook

page_text: on the recording lever S³ from a like projection on the rod 73, whereby the latter is
pressed down by a spring f and the circuit broken through spring contact 34,
substantially as described with reference to Fig. 5 of the drawings.
9. A circuit closing arrangement for the mechanism referred to in claim 3 for
regulating the quantity of a particular gas in a gaseous mixture, in which a
membrane M in communication with; the receiver or the gas vessel a of the
absorbing apparatus and a "circuit closer 7 are mounted on the stem Z
carrying and moving the vessel m, so that the movements of the membrane
caused by the gas attenuation and condensation are transmitted to a rod S¹ whereby
the circuit closer of the regulating mechanism q (Fig. 5) is actuated and, it may
also be, simultaneously therewith (as by means of rod S in Fig 4) also the marking
stud of the recording apparatus, substantially as described with reference to Fig. 5ª of
the drawings.
10. A circuit closing arrangement for the mechanisms referred to in claims 2 or 3,
in which a quicksilver manometer 2 is interposed in the electric conductor, one leg
of said manometer communicating with the receiver l or with the gas vessel a of the
absorbing apparatus and the other leg carrying a contact 3 which dips, circuit
closing, into the quicksilver, when after completion of an absorption process and
upon the ascent of the vessel m the surfaces ef the liquid o in this and in the
receiver come to the same level and 'therefore also those of the quicksilver in the
manometer r², the circuit however being broken when, during an an absorption process
one of the quicksilver columns in said mamometer, through being drawn by the gas
attenuation, rises, and the other, correspondingly falling sets free the contact 3,
substantially as described with reference to Fig. 5 of the drawings.
11. For carrying on the operations referred to in claim 1, an arrangement required
for opening and closing the gas inlet and outlet tubes of the gas vessel a. at certain
intervals of time, in which arrangement a cam driven in controlled manner
actuates levers jointed to the rods which open and close the flexible gas tubes,
substantially as described with reference to Fig. 1 of the drawings.
12. For carrying on the operations referred to in claim 1, an arrangement required
for opening and closing the gas inlet and outlet tubes of the gas vessel a at
certain intervals of time, in which arrangement a rotary cam u so actuates through
two levers u, u, the rods us, u, each provided with lugs p for pressing several
flexible gas tubes; that after the gas vessel a has been charged with a fresh gaseous
mixture, first the one lever u5 closes the gas supply tube I and the gas discharge
tube II, and then after the gaseous mixture enclosed in the gas vessel a has been
brought to the pressure of the atmosphere by means of a hollow elastic organ, for
example, a globular vessel d, interposed in the gas discharge tube II between two
lugs, the second lever u again closes the gas discharge tube II between the gas
vessel a and the elastic organ d and at the same time closes also the tube V
connecting the receiver with the atmosphere, on the other hand the tube IV
connecting said receiver with the gas vessel a is opened, so that the now occurring.
gas absorption or the attenuation of the gas thereby produced, causes a liquid column
to rise correspondingly in the receiver and after completion of a gas recording or gas
regulating operation the lugs p of the rods us, u, are operated in the reverse direction
from the cam u and levers u, u, to again open or close the tubes for the purpose of
charging afresh the gas vessel a, substantially as described with reference to Fig. 6A
of the drawings.
13. A mechanism of the kind referred to in claim 12 for closing and opening the
gas supply, in which the gas supply and discharge tubes I, II, are combined with an
additional tube III for the purpose of, during the absorbing, recording and, it may
also be, regulating operations, conducting to the absorbing apparatus the gas
continuously taken from the gas source, this thereby passing in the direction of
arrow 15 through the then opened connecting tube III which on the other hand
is closed by a lug p when the gas vessel a, with the gas supply and discharge
tubes I, II, opened is again, in the direction of arrows 1 to 9, supplied with a fresh

page_text: gaseous mixture, substantially as described with reference to Fig. 6A of the
drawings.
14. An equilibrating arrangement of the kind referred to in claim 12 in which
the caoutchouc globular vessel d interposed in the gas discharge tube II, is replaced
by a gas holder or collecting vessel H interposed in the gas tube and which through
a gas inlet H³ and a flexible tube A is in communication with the gas source, and
through a gas outlet H and a flexible tube I. with the gas vessel a of the absorbing
apparatus, and which is provided with air supply tubes H, H', through which, when
the air tube VI is opened for a short time and the gas supply shut off by squeezing
the flexible tube A and the gas discharge tube II closed by squeezing the same
through rod u8 (Fig 6), air enters for placing in equilibrium the gaseous mixture
enclosed in the gas vessel a and the atmosphere, substantially as described with
reference to 6b of the drawings.
15. For the purpose of the controlled operation of the parts performing the absorp-
tion process, a lifting mechanism in which after shutting off the gaseous mixture in
the vessel a, a crank pin elo during its throw through about a quarter of a circle raises
the absorbing parts through rod es, lever e', and rod e', and in its further throw
through about a quarter of a circle, permits these spring loaded parts to descend, and
in the remainder of its throw slides freely in the fork ell of said rod es so that during
this time the absorbing parts remain at rest, substantially as described with reference
to Fig 6 of the drawings.
16. For the purpose of raising and lowering the indicating vessel m in a controlled
manner, at the intervals requisite for the recording or regulation of a particular gas
in a gaseous mixture, a mechanism in which after those parts of the apparatus which
effect the absorption of said particular gas have come to a state of rest, a crank K
through a roller K lifts a rod K¹ sliding in a guide K and provided with a project-
ing frame K, said rod K¹ in turn lifting the lever K2 which through a rod Z carries
the vertical slide S2 of the indicating vessel m, and in which mechanism after com-
pletion of the upward stroke, the roller K, for the purpose of slowly lowering the
vessel m, runs on the oblique surface of the frame K³ until the latter reaches its
lowest position and during the remainder of the throw of the crank remains at rest,
substantially as described with reference to Fig. 6 of the drawings.
17. For carrying on the operations referred to in claim 1, the arrangement in a gas
absorbing apparatus driven in a controlled manner, of a gas pump driven therewith
for the purpose of circulating the gaseous mixture through the gas vessel,
substantially as described and shewn.
18. For carrying on the operations referred to in claim 1, the combination of a re-
cording apparatus with a gas absorbing apparatus driven in a controlled manner and by
means of which completely enclosed gas analyses are automatically carried out in a
controlled manner, substantially as described and shewn.
19. For carrying on the operations referred to in claim 1, the combination of a
mechanism for regulating the quantity of a particular gas in a gaseous mixture with
a gas absorbing apparatus driven in a controlled manner, substantially as described
and shewn.
Dated this 20th day of Sentember 1897
CAPITAINE & VON MERTLING
89 Chancery Lane, London W.C. Agent for the Applicant.