US1046651A - Acetylene-generator. - Google Patents

Description

H. RUWNTREE. AETYLEHE GEHEBATQR.

Arrnlcnxox rum mm1. fsw.

Patifuted Dec. 10, 1912 H. ROWNTREE.

ACBTYLEHB GENERATOR.

APPLxoA'rIoH rxLxzn JULY 7. 1910V 1,046,651 Patented Dec. 10, 1912.

3 SHEETS-SHEET 2.

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H. ROWNTRBE. ACETYLENE GENERATOR. APPLIcATxoN FILED JULY 7, 1910.

Patented Dec. 10, 1912.

3 SHEETS-SHEET 3.

gard' toF instructions.

, construction, combination,

Meer i HRO'LD nown'rnnn; 'enrol-leeg rn-Liners, y. .fissianoa 'ronaafionan f 'eoiaranr, or`criterio@liitrnois; a; ooaeonarzon ori- Weer VIRGINIA. t f' Loewe?! To all whom; it may concern: i

Be it' known that l,v Harem loWNTRi-ie, a citizen of the United States, residing at Chicagmcoiinty of Cook, Stateof Illinois,l

have made -a' certain Lnew and useful invention in .licetylene-Generators,fof which the following is a specification.

Tliis'inventionrelates to acetylene generators. y

The` object of the invention `isto .provide a construction and arrangement of acetylene` generator and accessory mechanism, which is simple` and elicient,rivherein 'the operations are readily and easily controlled, and wherein provision 'is inade-E fo'r -preventing explosion, accident, or other disastrous results diie tocarelessiiess, neglect or' disre A farther object of the invention is toprovide a generator of tlie'fcliaracter referred to, wherein means are provided for preventing a further supply of carbid or other @as producing material to the generator, after a supply thereto has become exhausted, until the generator tank has been: completely emptied and refilled.

A-fiirther object of the invention is to provide a ,generator ,of the Acharacter reerred to lia/ving means for preventing the generator tank from being relled until said tank has been iist completely emptied and drained. 4

A further object. of the invention is to provide. means for aiitomatically feeding the gas` producing material' into' the generator tank, andfor rendering the automatic feeding means inoperative Vduring the time thev generatoris vbeing drained.;

Other-objects 'of the invention will appear more fully hereinafter.V Y l,

The 'invention consists suli'staiitiailyin the location, and relative arrangement or parts, all as will, be

f 'more'fiilly hereinafterset forth, as shown in the accompanying drawings, and iinally pointed out in the appended claims.

Referring to the accompanying drawings, and tothevarioiis views and reference signs appearing thereon,-Figiire lis a view in top planet an acetylene generator embodyingv 'the principles o my invention. l Fig. 2 is a viewin elevation of the same taken "Speccation of Letters Patent..

I appiication inegi Jiiiy 7, i910. srii no. 5mg-.271

retreated ne. 1131912.'

from ythe pointinarlied- 2 in Fig. l.' Fig.

is a broken vieiv in elevation taken from the. point marked 3, in i. Fig. l is. a viewY india-gram showing' the relative positions and operations of the controlling valves.

The same part is designated by the same reference sign wherever it occurs throughont the several'views.y

Actylene generators have been proposed, and are in iise. in which calcium carbid, or

k tor operating acetylene generators have not been faithfully i'olloived.A sometimes causing` disastrous results. lsiially the carbid. or other gas yielding material, is delivered into :i hopper from which it is fed or delivered into the generator tank. After the hopper has been emptied, and the pressure of generated gasin the tank begins to fall, the Water in the tank has become charged with :i residiiiini remaining after the generation of the gas, 'and the Water, by reason of such re'si'duiim,v is unlit for Vfurther use, and, together With the residuuin, shoiildsbe drawn oli from the 'tanlr'before a fresh charge of Vcarbid or other gas yielding material, is

supplied to the hopper. 'lf tlieviaterand resid-.uom .fi re not drawn oil or drained from the tank, or ar'eonly partially drawn oil or drained therefrom, tlironglicarelessness, neglect,"inattention, or otherwise, the sueee lingsiippiy ot'tresh carbid, or'ot-her gas yielding material, produces -a dangerous amount of lic-at; It vis among the special piirposes'oi my present invention to provide means ivi'icreiiy itis impossible to renew7 the fiiiiiply'ofca hid to the hopper' until after the tank hasheen completely emptied and drained and then properly refilled.

In order to carry out and accomplish the special objects and purposes of my invention, I propose to employ means whereby when a charge of carbid in the feeding hopper becomes exhausted by being fed into the generating tank, and the pressure of gas in the tank begins to fall, the gas contained in the generator is automatically liberated through a suitable vent While at the same time, the vgenerator tank is opened to a suitable drain connection to. permit the water and residuum to exhaust and drain therefrom. When all of the gas as well as the residuum and water have thus escaped or completely dr ined vfrom the tank, the exhaust vent an drain connections are closed and a supply connection opened for a fresh supply of water into the tank. This open-A ing of the water supply to the tank, in accordance with the principles of my invention, cannot be made, however, until after the gas exhaust vent and water and residuuni drum connection have been closed. lt is also important and necessary to prevent the supply of additional, or a fresh/charge of the carbid to the hop ei until the generator tank -is again filletfJ with a fresh supply of water to the proper level, and the fresh water supply'connection is closed. It is also important that the auto-matic feed for delivering the carbid from the hopper into the generator tankvbe locked in inoperative position from the time when the gas vent and residuum drain connections are first opened until after the entrance for the figesli supply of carbid to the hopper is again closed.

In accordance with the principles of my invention I provide means for insuring the carryin out of these various operations in sequential order, and by means which are not dependent upon the care or attention of an attendant.

Referringto the drawings, reference sign 4 designates the generator tank. Atl one side of this tank is arranged a vertical shaft 5 carrying a bevel gear 6, at. its upper end arranged to mesh with and drive a similar bevel gear 7, of equal size therewith, said gear 7, being carried by a horizontal shaft 8, suitably journaled in bearings mounted upon the upper end of the generator tank 4. Connected with the gear 7, to rotate there,- with, is a disk 9, having an engaging shoulder 12. Loosely mounted on shaft 8, to revolve thereon, is\a sheave or drum 13, around which is wound a chain or otherl suitable flexible connection, which passes overidlers 15, and having a handle 16, connected to one end thereof, and a weight 17, connected to the other end thereof, said Weight being held and guided by the guides 18. The drum or sheave 13, carries a pawl 19, which cooperates with the shoulder .or detent 12, of disk 9, the arrangement being such that when the sheave or drum 13, is rotated in a direction contrary to the travel of the hands of a clock, the pawl 19, will travel over and freely pass the shoulder 12'. When, however, the sheave or drum 13 rotates in the same direction as the travel ofthe hands of a clock, the pawl 19, will engage the shoulder 12, and cause coincident rotation of disk 9, and with it gear 7, and shaft 5. The arrangement is such that when the handle 16 is pulled downwardly, the pawl 19, is carried around with the sheave or drum 13, riding freely over shoulder 12, while at the same time the weight 17, is raised. This weight must be raised siitiiciently high so that the drum 13 will make a complete revolution before the pawl 19, is brought into position to rengage the shoulder 12. Unless this is done, the release of handle 16, will not result in coupling drum 13 and disk 9 to revolve together, but when the weight 17, is raised to a sutiicient height for the pawl 19, to engage Vand/lock against shoulder 12, the release of handle 16, to permit the weight to again descend, causes rotative movement to be imparted to shaft 5, through the intermeshing gears v6 and 7 as above explained. lI so arrange these parts that the movement of the weight 17, from its extreme upper position, indicated in dotted'linesat 10, Fig. 2, to its extreme lower position indicted by dotted lines at'11, will cause one complete revolution to be imparted to shaft 5.

The descending movement of weight 17 is effected in four successive stages. The extreme upper position of the weight corresponding to the first or initial position of the parts in the cycle of sequential operation of the apparatus, as above indicated. The downward movement of the weight is arrested at the completion of its first stage of movement :by a movable stop device 28, arranged in its descending path, the position of arrest of said weights by stop device 28, marking the second position of tlie parts-in the cycle of operation, this first stage of movement of the weight effecting a onequarter revolution of shaft 5. lVhen the weight is released from stop device 28, it resumes its descending movement until it is arrested by movable stop device 29, arranged in its path, at the completion of its next stage of movement, leaving the parts in their third positions in the cycle o`f operation of the apparatus. During the movement ofthe weight from stop device 28, to .stop device 29, another quarter revolution is imparted to shaft 5. Then the weight 17, is released from stop device 29, it continues its downward movement until arrested by movable stop device 30, this being the completion of the next stage of movement leaving .the parts 'in the fourth position, and imparting another one-quarter revolution to shaft 5. When the Weight 17, is released from stopv device 30, it continues its ilownwartl movement to its lowermost limit es indicated at dotted lines Il, liw f f. thereby imparting the iinal oneouarter revolution to sbaf, and completing the one entire revolution of said Shaft necessary for .the accomplishment of the full purposes; :1nd operations of the apparatus. Should the weight- 17, he again raised from any one of its inte-fine diete stops before reaching its extreme lower position, there will loe no result, since such rinsing movement will not he suiiieient to rotziriljv7 displace sheave 13, through the extent necessary for the pmvl t9, to rengage with Shoulder l2. The weigl'it must reach its extreme lower posilion, unil the drum i3. :loll .shaft 5. must eoinplete one entire revo lotion iu orrler to bring the parts inlo their relative poezitions for repeating 'the eyeleof operations in their sequential order.

l will now. describe ineens for rintonniti emily. sind at the proper time7 removing the momhle stops anti 2S). from the path of the descending weight i7. Arranged at the side of the generator tank ll, is the Auxiliary tank 20, in which operates o. ihiasit 2l. To this iozit is :ittueheci i rofl 2f.. entenlling iip- .vlufllv through the opper enti of saint :lnxil'iiir) trink lfpon this rml are mounted efflhirsl anal L-l the upper rollin* il. operating' in i vinili-allg arranged ruhe which thri'ehv forms u guide thee for. lhen the tirait 2l. approaches its extreme lower poSi tion in auxiliary trink 20, the Collar Q4, on roll will engage :intl rook u lever 2S. :intl when the limit 2l, approaches its upper limit of movement the Collar 23, thereon. will en ginge unil move a lever 27. The leiers Q6 unil 2T. :1re oi'iei'utively eonneotetl respee tivelj` to the motuhle stops and 2%). so that when ,luid lever 26 is cniovetl by the en' gzigfeinent thfreivith of collar 2lithe stop 3H will he witlirlrmvn from the path of weight 1T. therehv releasing' sind weight from the position in hit-h it` had been :irrt sled hv said stop. Similarly when lever 27, is movetl hy the engagement of Collar 23. tlierewith, stop 29 moved out of the path of Weight 17 to release said Weight vfrein the position in which it is arrested hv siiitl stop Thus when auXilinry trink Qi) is eoniiiletely eniptieil, .stop 2S. is `withtli'uwn from the path of weight l?.y :intl when Suhl auxiliary tank is eonipleteli` lilleil stop Tluis the movements: of the weight i i l l l l l l l i l l "1"?. is viilnlrzilivu iroin the path ot .sliirlg l l i i i i l l i l ated to four distinet. positions. each Si1eeeeing position being; one/'quarter of a ift-volw tion from tho preeetlng position.

l will now explain the operation of the various contre-lling faires eoneernml in the operation of the iigvijmrlitiis in its varie-ns Sequential nho've explained. (in shaft are mounted four gear wheels Si. 32, Bil and 34', whieh mesh r eetirely with four geur wheels ot' esp/ml ,sii/.e H

i l l i and 3S. 'i ,`he gears 35, 36, El? troll LS :1re resiieotively mounted upon unil operate to respectively Control valve devices B. C, D'. These @vulve devices include preferably, quarter-turn vulve?. Valve eonneets through pipe Sie) unil pip ll., with ille intei'ior of trani; l. lt also ronneets lo vent A'll which opens to the atmosphere. The outlet 40, freni the limit also eonneets willi the su'r'etv vulve 4L. whieh hlowa; oil through the vent 4l. in ease the iirrseure increases bevond the certain leinite degree, pretlel'er niineel h v the adjustment of the safety valve rfl... io the usufil nninner, As intlietiterl in Fifi. l. the pipe lll Coniinunieates with the 'valve easing ot valve llt-vire A :it diametritrillv oppos p te points :is iuflienturl ht' dotted lines :it 80. .so that pipe 3h). will he opened to the vent il. in tivo of the 'foto' positions to which t. vulve iff if-tainted tit envi; [foinpleie reveluthm of :shalt .l while in the other tivo positions of ther cycle. the pipe 2&9 will he elosell against eon'nnuniezition with vent li.

The 'water supply pipe il? delivers to the easing of vailve tlmive ll. This easing ulm erimnninioe.tesI through pipe il. if: the tup of auxiliary tank il). lt will he nlnet-veil. see i/iartieultirlv Fig. ll. thz there is onl)Y one position oi' vulve ileviee ll whivh will iopen the water .suppljtV pipe i3 through pipe connection -ll to the ziuxiliiir)v llink 20.

pipe l5, lelivers troni the lower enti et' auxiliary toni: 2l). to the easing ,-t vllve pipo 46, delivers to the vulve (fusing: of valve device (V- through two openinp :it alla iinetrically opposite sirles ot .sui-ii anfing :is indicated by dotted lines Si, l. Suhl pipe 4V). eonneets with i pipe 4T. vmieh ilelivers from vthe bottoni of the, generator tank 4. By this. arrangement it will he seen that the pipe connections 43 :intl lli are phnfeil in eonnnunieation with eznzh other in tivo posiY- tions` oi' the vxlve. The pipe winneetion l?. extenilss iovi\vzii"flly mul enters the en et vulve tlevire l. ii drain pipe erinnwion ei. delivering .from the rising ot votre ile-- vice D. lt will be oli-served that while the vulve device C in two el its four positions e'tl'ects a coininnnietioi'i het/Ween pipe '-fznneetions 43 :intl viti, :is @there e'liiterl. there is only one position in whieh 'valve (leviee l) opens communication Jloetween pipe nnnection 47 and the drain pipe connection 4S,

In accordano@ with the principles et my invention, I provide means for automatically feeding the calcium carbid into the generator tank, and for controlling the opening through which the carbid is introduced into the tank. in` such manner that except at a predetermined stage of the sequential operation of the apparatus` the feed opening for the carbid, is maintained inaccessible, and I provide means for automatically controlling the feed4 of the carbid into the tank by the pressure of the generated gas, and means for automatically lock ing the feeding mechanism against operation When the feed opening for the introduction of the carbid is rendered accessible, thereby not only preventing the operation of the feeding mechanism While a fresh charge of carbid is being introduced to the feed hopper, but also controlling the operation of the feed mechanism by the pressure of the generated gas. I will novv describe means embodying my invention for accomplishing these results. Reference numeral 49, Fig. 3, designates generally a clock-Work mechanism arranged to be driven and actuated by a Weight 50, the cord or chain 82. which suspends the weighL 50, being` Wound upon a drum 5l, to the axle or shaft of which is connected a large gear Wheel 83, arranged to mesh with and to drive a pinion 84, carried by a shaft 52, which extends down into the generator tank through any suitable arrangement of stuffing-box and carries a feed disk 53 upon the lower end thereof. The Weight is raised after it rims down in the customary manner of 'Winding up the Weight of a clock.

Arranged in the upper end of the generator tank 4 is the feed hopper 54 into which the calcium carbid or other gas yielding material is introduced thrcgh an opening in the top of the generator tank arranged to be closed by a removable plug (35. When the carbid is introduced into the 4.5 hopper 54, it descends therein to the central opening in the loivci end thereof. The disk 53. forms a bottom for the lower open delivery end of the hopper, but said disk is spaced dowiiivardly below the extreme lower end of the hopper a sufficient distance to permit the carbid to be delivered from the hopper over the peripheral edge of the disk 53. In order to cause the carbid to be delivered over the edge of disk 53 so as to be dropped therefrom into the tank 1. I provide the lower endv of the hopper ivith displacing plates 8:7,.arranged around the edge of the cpening or mouth of the hopper.'

Attached to the shaft of drum 5l, is a stop wheel or dif-'lt 55. In order to control the operation of the feeding disk 5?). autoniaticallv, by the pressure of the generated gas. so as to maintain a uniform pressure of gas. l provide a pipe connection tI-l, to

. '1r from the u ier end of the generator e iw g tank into the casing of a diaphragm device GO, and I arrange this diaphragm device to control an arm 8G, carrying an adjustable weight 62 and connected by ine-.ins of a link 87 with one arm of a detent 56, pivoted at 5S, intermediate its ends. The free end of said detent 56, isarranged to bear againsty the surface of the disk By this arrangement it will be seen that when the gas pressure exceeds a predetermined degree'in the generator tank, the lever 86 is raised by the diaphragm device 60 thereby rocking detent 56 into engagement with disk 55 and hence arresting the clock-Work mechanism, and of the feeding disk 53. Nhen the pressure in the generator tank falls again, the Weight 62 will rock lever 86 downwardly thereby releasing the detent 56, and hence causing the clock-Work mechanism to resume its operation, and consequently again resuming the feed of the carbid from the hopper into the generator tank.

In oi'der to render inaccessible the feed opening through which the carbid is delivered into the hopper 54, except at a given stage in the cycle of operations, I mount on the shaft S, a drum 64 to revolve therewith. the plug G6 being located immediately be low said drum, so that said plug is iendered inaccessible for. removal until said drum rotatively displaced sufficiently for an openingl indicated by dotted lines at G5, see Fig. 2, is brought into position directly over said plug. This opening is so located as to be brought into position over plug 6G to permit the removal of the latter only when the proper stage in the operation of the apparatus is reached. This point is reached when the weight 17 is resting on stop device 30.

It is desirable to arrest the operation of the clock Work feeding mechanism during the time the plug (5U is accessible for removal. To acconiplish this result I mount a cam arm 63 on the end of shaft S, and arrange the saine to engage a detent 57, and liftithe same out of locking engagement with the disk 55, at the proper time in the operation of the apparatus. The arrangement of these parts is such that the detent 57 placed in detaining relation with respect to disk 55, and is only liberated therefrom when the Weight 17 is in its top or bottom position.

ln the lower part of the generator tank is an agitating device 67, operated by a crank 85:, outside of the tank to facilitate the cleaning out of the tank while itr is beine' drained.

`In order to insure a proper level of fresh water supply to the tank, I provide the upper end of the auxiliary tank QOvWith an overflow pipe connection ,68, see Pig. 4.

If desired, the various devices and mechanisms mav/be inclosed .vithin the Walls of a chamber'u indicated at 70 and provided ductujig.` pmterialj hase Abecome -exhnusted.- gfact. will.:killso c'be revealed by. the -yeggl 150,.. o lfifthe. ipotorlngeehftnism .which pe .thefieegl-fliski-, being in its.lo\yer' posit nsliogi'lingjligitfthe motor mechanism: 4Q .-1 1s ,11u11 dgxvfugf, T p-.;1tt.e1.1dzxnt however,- nnotlstjlpplyfuglgl igual carbid tothe'liopq. ;,perY fbecausepat this'hime; the. plug 66= which! @p3-ers the opening 2 th rough Awhich the Carhifi,fisintroglneed. to the. hopper, isinf aCees;,gillefforVE relvxlox'l,Y on account of the drumggbeiiig.imhemy nu @he atrend:- f-zgntngnJle is to 4pull .doivnA the Ylm'ndlef16- t eieby'misngt-he weightfl to `its highest linfriisj siindicntechat l1G, Fig. '2, und then re leasggs hndle- 1,6,.-It' `should be notedA tha-alslegthe Aigene rutoij isf in 'operation 25.24.1nderjnormal conditions, that is, while the "weighitfglfvis either i-tsupper f or:A "lower limits` ofiriovementgthe .four valvedevices A, iBLG und D'afll in cutoff positioin' and the l-.oat tank -tgndthe genrator-ftank .Y are filled with njatento the desired and defi# nitelevelslightly ..below the safetyfevertlcm'- raised to the topflimitvo'f its movel'nent anda mbe'nlrlibertecl.1it..begins'1todescend ntil it.; gyzrezrch'esgtop #28,-

IDufring Athis nio vementgthe snelzf :13 i :ind-fdisk 9.- arefarcoupled "togetherr to' @rotate :in f-unise'n. :by fthe engagement ci. pawl., 1.9 with shoulder i-12,"fvtherehy impart-f inilfone-'quarter revolution to slmft 5.

40 'Tliro'ghs'tfhe gear con'rieetionsijof'saidishaft i mi'p the draiuingiof the` float' tankf gen'-l stopping any i A mehanism.

,This freising iis@ until it-fisv again farrest'ed 'by'sto'p device v30.

` This r-nioxelinent-iinprtsgnother.- one-quarter ioo valve deviceiBlrgItf/wili also-.closefthe tank connection valve device CA andst-ill leavesf'th'e :1s` indicated'fin dotted lines; in' Figi-2 by'.

bringing the aperture 65' infthedrin overV carbid; the generator":hztvingrheen 'pif'perlfy eatzedgat 11.*: This .a'ction .imparts the "final one-'quinfer turn .to the valve "de'xiice-s; 'i still leaving' 'them' Vwill" closed., and 'ellso moving 'detenta 57=tlfereby 'permitting' the feeding motorto resume its .operation..` Thereupon c'ycfle off operatilis":aboe'fdescrlbed may '.b resumed i-'in ciek structures and; airran'geiil'ets of 'puppe-*1130 ratiisembodying the principles of my in'- vention I desire it to be understood that many changes and variations .in the structure, details and arrangements thereof might readily occur to persons skilled in the art and still fall within the spirit' and scope of my invention. B ut :Having now set forth the object and nal ture of my invention and a construction embody-*ing the principles thereof and having described suoli construction its purpose function and mode of operation, what I claim as new and useful and of my own invention, and desire to secure b v `Letters Patent is,-

1. In an acetylene generator, a tank, and means for supplying charges of lgas generating material thereto, in` combina'ion with means foil preventing the supply of an additional charge of gas generating material to the Vtank until said tank has been completely emptied of 'its previous charge of material.

2. In an acetylene generator, a tank, and

means for feeding Agasgenerating material thereto, in combination with means for ai*- resting the feeding means to prevent Athe feed of additional material to the tank until said tank has been completely emptied of its previous supply of material. 3. In an. acetylene generator, a tank, means ior supplying gas pnrodueing material to said tank, and automatic Ameans for preventing vthe supply cf more than a-'definite amount of gas producing material until'the tank has beeiieompletely'emptied and re filled.

4. In an acetylene gent rator, a tank, inea ns for supplying gas producing materiat to the tank, means for supplying waterA to charge the tank and means lfor preventingl the supply of additional water charge after the tank is once charged therewith, until the tank is emptied-of the previous charge.

5. In an acetylene generator, a. tank, adapted to containfvvater, .means for automatically feeding nfas producing material into the water, and ineans for preventing more than a definite amountof gas pioducing material from entering the water when 'the tank is once charged therewith until the tank has been completely drained of said charge and refilled.

6. In an acetylene generator, a tank, adapted to contain water, means for feeding carbid into the water to generate gasand means for preventing the introduction of the carbid to the water, after the tank is once charged therewith, until the tank has been drained of said charge and refi1led.`

7. In an acetylene generator, a hopper to receive a charge of carbid, a tank adapted" to receive a'charge of water, automatically controlled means for draining the tank, motor operated means for feeding the carbid from the hopper into the tank, and means arranged to be brought into-activerelation coineidcntly with the operation of the draining means for rendering the feed of carbid inoperative during the time the tank is being drained.

8. In an acetylene generator, a tank adapted lto receive a charge of water, a hop per to receive carbid, motor driven mean. fior automatically feeding'thearbid from. the hopper into. the tank, means -for draining the tank, and means arranged to be brought into active relationcoincidently with the operation of the draining means vfor arresting the operation ofthe automatic car-bid feeding means during the time the tank is being drained. y

J9. In an acetylene or other generator, means for supplying gas producing mate iials to the i the l gas producing materials into contact with each other and means` for preventingr said materials from being brought Yinto contact with each other after a predetermined amount of said materials are brought into contact, unt-il the generator has been 'emptied.

'10. In,- a generator, a tank, a hopper, means for filling the hopper. means for draining the tank, and means for rendering the hopper filling means inoperative until the tank-has been-drained.

11. In a generator, -a'ftanlL means for rgenerating gas within 'said tank. a pipe connection for delivering the ,gas from said tank, means for draining the residuum' 'from said tank, and means for arresting the generator after a definite amount of generation has been accomplished until the .residuum has been drained out from the tank.

12. In a generator, .a tank, a hopper having an opening for admittilig a charge of gas producing inaterial theretb. means for feeding the gas producing material from the hopperinto Vthe tank, and means for renderingr inaccessible tliecliarge `'opening of the hopper during the time the' tank is being emptied and refilled. 13. In a generator, a tank adapted to contain water, a hopper,an openingv for introducing a charge of gas producing material into the hopper, means for feeding the .gas producing Vmaterial from the hopper into the water contained in the tank, means -for rendering -inaccessible the charge opening into the hopper until the tank has been drained of the residuum left 'by a pre- 'viously admitted charge.

14. In a generator, a tank, a hopper delivering into the tink and having av charge opening for Ythe introduction of gas producing charge to the hopper, andr-itans .for rendering said charge opening inaccessible until the tank has been emptied of the previously admitted charge.

15. In' a generator. a tank having water supply and drain connections, automatic Generator, means for bringing..

-a tank, having gas exhaust, water supply and drainage connections, and automatic means for preventing the operation of said connections except in sequential order.

'18. In a generator, a tank having gas exhaust, Water supply and exhaust connections, valve devices fo'r controlling said connections and automatic means for operating said valve devices in sequential order.

19.111! a generator, a tank having water supply and" drainage connections, means for supplying carbid to said tank and automatic means for controlling said connections and supply means land acting to prevent the operation fthe same except in sequential ord-erf'. i

- '20. In a" generator, a tank `havin water supply and drainage connections an a feed opening for carbid, and Iautomatic means for'jcontrolling said connections and feed Opening and acting to prevent the o eration of the same except insequential lor er.

21. In a gerator, a tank' having water supply and ina e connections, and means for admitting car id in combination With means for controllin said connections and admitting devices an automatic means for preventing the operation of said controlling devices except in sequential order.

22. In a generator, a tank having water sup Iy and drainage connections, operating mec anism therbfor and automatic means for controlling said operating mechanism and arranged to prevent the operation thereof except in successive stages of operation'.

23. In a generator, a tank having water supply and drainage connections, means for `operating' said connections, and automatic.

devices for preventing the operation of said operating means except in se uential order.

24. In a generator, a tank aving carbid supply, Water and drainage connections, means for operating said connections and automatic means for preventing the operation of said operating means except in sequential order. y

25. In a generator, a tank having carbid supply, Water supply and vdrainage connections, means for operating said connections in sequential order, and means operated by the water supply for controlling said selquential operations.

26. In a generator, a tank having Water supply and drainage connections, an auxiliary tank arranged in the Water su ply connections, means for operating sai connections and means arranged in the auxiliary' tank for controlling sald o erating means.

27.111 a generator, a tan having carbid supply, water supply and drainage connections, means for controlling sald connections, an auxiliary tank arranged in the Water supply connection, means or inaugurating operation of said controlling means, a lioat in an auxiliary tank and meansfoperated by said float for rendering the operation of said controlling means sequential in operation.

In testimony whereof I have hereunto set ,my hand in the presence of the subscribing Witnesses, on this 13th day of June A. D., 1910.

HAROLD ROWNTREE.

f "ammission

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