Jan. 14, 1947. ` D_ M_ PALM 2,414,209 FUEL FEEDING MECHÀNISM Filed Nov. 27», 194s :s_sheets-sheet~ 1 o 125 IIÑ-VENTOR. 'DWIGHT MfPALM. Jam 14, 1947.( D_ NL~ PALM 2,414,209 FUEL’FEEDING MECHANISM ' Filed Nov.` 27, 1943 5 Sheets-Sheet 2 INVENTOR. Jan.14,1947. ` - D_ M_ PALM ; > 2,414,209 FUEL FEEDING MÉCHANISM Filed Nov. à?, `1945 s sheets-sheet 5 nas. 23K 230` INVENTOR, BY DWIGHT MPAL M. Patented Jan. 14,_ 194'? 2,414,200 UNITED 'STATES PATENT OFFICE . ’ - 2,414,209 ‘ \ ` `FUEL resumo MEcHeNIsM Dwight M. Palm, Cleve-lana Heights, ohio Application November ,27, '1043, serial No. 512,076 3 Claims. (o1. 214-36) ` ' l 2 . This invention relates to mechanism for sup plying hard fuel to a combustion apparatus, more to those skilled in the art to which my invention relates from the following description taken in connection .with the accompanying drawings, `particularly apparatus of the type wherein the " wherein supply and feeding of the fuel into the combus tion chamber of the apparatus takes place through upper and lower chambers having valve controlled openings, which valves are separately but >co-fordinately controlled and operated to pre vent the escape of gases and other residue of, combustion into and throught-,he supplying and feeding mechanism. The invention is, for illus~ cui trative purposes, shown as applied to a gas pro ducer, to which the fuel is delivered in batches, at intervals, dependent on _the rate of increase or decrease in fuel consumption, whereby the producer may be maintained adequately charged li5 . Another object of the invention is to provideY in mechanism of this type having upper and lower valves, improved means for operating the valves in any desired co-ordinated~relation. Another object of the invention is to provide yin mechanism of this type' having upper and i. lower valves, an improved operating means there for which may be remotely controlled. ` ` , t Fig. 2 is a side elevation, parts being broken away. Fig. 3 is a section on the line A2te-3V of Fig, 1_. Fig. 4 is a fragmentary section through the valve. , Á ` Fig. 5 is a section on the line 5--5 of Fig. fl, Figs. 5a and '6 are fragmentary elevations with fresh fuel. One object of the invention is to provide an. improved mechanism of this character wherein the number of parts are reduced and simplified in construction and fewer movable parts are required, whereby cost of construction, opera tion and up-keep is materially reduced and long life ofthe mechanism results, Fig. 1 is a front elevation of >a mechanism em bodying my invention. ‘ Another object of the invention is to provide l(parts being broken away) showing modified forms of construction. ‘ ` ‘ In the drawings, l indicates as an entirety a casing of any desired shape in cross section, pref? erably substantially circular in shape, having _on .its lower end» an annular flange la supported on and secured to the-annular flange on the upper end of a suitablegas producer, indicated at A, having a flue a` for the out-take of the'gases. The upper end of the Acasing is shaped to provide an off-set section Ib in ‘connected relation to a chute lc, the intake opening of which is related to the discharge opening of a hopper B, which opening is controlled by a slide valve b. The walls of the off-set section lb and a valve` device 2 therewithin control the feed of the fuel C from Nthe chute Ic, as later set forth. Above the flange . la, the inner wall of the casing I is provided in teriorly with spaced, annular, inwardly extend ing walls 3, the inner peripheries of which have fin mechanism of this type having upper andg, a common axis and form seats Za for valves lower valves, improved means for automatically" 'controlling the operation of the valves dependent 4, 4a, When the valves 4, 4a,` are in closed posi tion, they cci-operate with the adjacent annular upon the rise and fall of the temperature inthe walls 3, to form upper and lower closed com apparatus. partments 5,`5a, the upper compartment E being ` ' Another objectfof the invention is to provide, in communication with the off-set section lb so in mechanism of this type having upper and 40 as to receive fuel C therefrom; but ,when- either lower fuel feeding chambers and valves therefor, ’valve is opened the fuel in the adjacent com# improved means for operating the valves in- co’ ypartment gravitates downwardly. Accordingly, ordinated relation and supplying fuel to the upper ¿if the valve '4 is operated to open position, any fuel in the compartment 5 will gravitate into the chamber. ` Another object of the invention is .to provide 45 Van improved mechanism of this type having upper and lower valve controlled chambers and fluid operated means for operating the valves therefor in co-ordinated relation. Another object of the invention is to provide an improved mechanism of this type constructed Ato provide for ready cooling of the valve which compartment 5a and if Athe valve. 4a is operated to open position any fuel in the compartment 5a will gravitate into the> producer A. For, obvious reasons the valves 4, 4a, move downwardly rela tive to their seats when opened; also their upper surfaces are dome-shaped and the upper sur“V faces of the annular wallslS are inclined down' wardly and inwardly, whereby gravitation .of .is subject to the heat generated in the combus fuel from each compartment is facilitated. tion apparatus. 1 shown each` wall 3` is Ofsectional"construction, so that its inner marginal portion ‘may consist , Other objects of the invention'will'be apparent As 2,414,209 4 of an annular ring 2a’ formed of a heat resisting alloy, removably secured to the walls in any suitable manner. . The side walls of the casing below the com- . a rocker fulcrumed on >a standard I4 fixedly mounted on thetop wall Id. The rod I2a has pivotal and slidable connection with the outer end of the rocker I3 by means of a pin and an partment 5a, between the compartments 5, 5a, 5V elongated sl-ot I2b’ therefor formed in the rocker, andv above the upper compartment 5 may be formed with one or more openings 5b, each closed by a plate which may be removably bolted in position or otherwise mounted on the casing wall. to permit endwise movement of the rod and swinging movement of the rocker; the connec tion vbetween the upper end of the rod 8 and inner end of the rocker i3 is of :similar character. The The valves .4,_4a are supported in axial aline- 10 lower _end of the cylinder `I2 is provided with ment and> operated vertically,î ,'reCtiIineally, a port connected to aA pipe I5 through which whereby their upper walls engage and disengage steam is supplied (preferably at a predetermined the valve seats uniformly throughout their cirpressure, as later set- forth) to the cylinder I2 cumferences, which arrangement prevents unbelowthe piston I2a’ and exhausted therefrom, even wear on these seats on the one hand and 15 the supply and exhaust being controlled by a on the other hand tends to insure tight Vclosîlfler valve mechanism, indicated as 'an entirety at I6. of the valves so'that leakage of gases of comAs will 'be observed, when steam is supplied t0 bustion and soot upwardly into they casing is the cylinder to effect pressure on the piston, the minimized and danger of ingredients in the gases . rod I2a is operated upwardly and through the „ and soot clogging'the mechanism is avoided. 20 rocker i3 moves the rod t downwardly to open The top Well id Of the Casing i iS thickened the valve-4a (see dottedlinesin 3). The up to provide a relatively long hollow Iboss Id’ the per end of the cylinder I2 is provided with a axî's of which is axially related to the axes of the vent I‘I to permit displacement of air when the walls 3. 6 indicates an elongated bushing suitpiston I2a’ is operated upwardly. Below the ably ñtted in the boss Id’ and slidably support- 25 cylinder I2, the rod I2a is provided with a collar ing a sleeve 'I, the latter extending downwardly ' i8, preferably formed integrally on the upper end through the compartment 5 and preferably rigid>of a sleeve Iél'a, which may be secured to the 1y connected at its lower end to the valve 4. 3 inrod I2a in a manner which permits endwise ad dicates a rod (which is preferably hollow for justment thereof. The collar I 8 forms an abut a purpose later set forth) slidably fitting the 30 ment for a spring I9 coiled around the rod I2a sleeve 'I and extending therethrough, and and interposed between the collar I8 and lower through the valve 4 and compartment 5a and end 0f the cylinder I2 and arranged to be com preferably rigidly connected at its lower end t0 pressed when the rod I2a moves upwardly, so the valve 4a. In this arrangement, the valves that when the steam supply to the cylinder I2 4, 4G, are DOSitîl/'ely 'guided from and t0 their 35 is cut ofi', and pressure on the piston I 2a re seats in each operation thereof. 'The sleeve 'i 11er/ed, the Spring I9 operates te more the red and the rod 8 extend upwardly beyond the top I2a downwardly to close the valve da. A stop wall Id and arel OperatiVGly COHIleCted t0 an indicated at I 2e is provided to limit the down OPSrating mechanism, indicated as an entirety ward movement of the piston so that when the at 9, for intermittently reciprocating the sleeve 'I and rod 8 each relative to the other in co-ordiDated relation, whereby during the peI‘ÍOd that the valve 4 is closed, the valve 4d Opens t0 Permit gravitation of the fuel in the compartment 5d into the producer` A and closes, and during the Del‘îOd that the valve 4a is closed the valve 4 opens t0 permit gravitation of the fuel in the compartment 5 into the COmpal‘tmel'lt 5a and closes; also, during the operation of the Valve 4a to open and closed position (at which time the valve 4 ís closed) the agitating or valve device 2 is operated, as later set forth, t0 supply fresh fuel t0 the COmPaI’tment 5~ The aeítatîhg device 2 is preferably operatively Connected te the `mechanism 9 for co-ordinated operation therewith during the opening and closing of the valve 4a, by mechanism indicated as an entirety 40 piston is moved downwardly te its normal pesi tion, it is above the steam -inlet and exhaust port“, for the pipe l5~ The Stop [2e as shown consists of an annular shoulder provided in the cylinder by reducing its lower end (see Fig. 2). 45 The sleeve Ißa is preferably adjustably ñxed to the rod I2a at a predetermined position so that when the valve ¿la engages its seat the spring I9 is under slight tension, the effect of which is to seal the valve 4a in Closed position. lzœ 50 indicates a cylinder suitably supported on and exteriorly of the casing I, preferably in diametri cal relation to the cylinder I2. 20 indicates a rod reciprocatably mounted in the end walls of the cylinder 12x and extending to a point there 55 above and therebelow and provided within the cylinder I2cc with a piston similar to the piston I2a’ normally disposed adjacent the lower end at I0, to which reference will later be made. The mechanism 9, as Shown in Figs. 1 t0 5, thereof. The upper end of the rod 2i! is con nected through linkage I3x to the upper end of inclusive, is fluid operated; that is, it may be 60 the sleeve -I, preferably consisting of a rocker operated by air or oil supplied under pressure, fulcrumed on ,a standard I 4x, which is ñxedly but for illustrative purposes I use steam supplied supported on the top wall Id. ` as hereafter set forth by a pipe II. The mechThe inner end of the rocker |332 is provided anism 9 consists of the following: I2 indicates with bifurcations which are pivotally connected a cylinder suitably supported at one side of and _65 to bifurcations provided on the upper endy of the eXteriOrly of the casing I. I2a indicates a rod reciprocatably mounted in the end walls of 'the sleeve 'I, whereby these parts straddle the rocker I3 vand rod I2a and lthe connections therebe cylinder I2 and extending to a point thereabove tween. The upper end of the rod 20 and ad and therebelow and provided within the cylinder jacent end of the rocker are pivotally and slid with a piston I2a’ (see Fig. 2) normally dis- 70 ably connected by means of a pin and an elon posed adjacent the lower end thereof. The lower gated slot 25a formed in the rocker and each end of the rod I2a has sliding support in a lbifurcation on the inner end of the rocker I3x ‘bracket I2’. The upper end of the rod I2a is is similarly connected to the adjacent bifurca connected through a linkage I3 to the upper end tion on the sleeve 'I to permit endwise move of the rod 81 the linkage preferably consisting of 7.5 ment of the rod and sleeve 4and swinging. move' 5 2,414,211@ ment ofthe rocker. The lower end ofthe cylin-v der I 2o: is provided with a port connected to a pipe I 5a through which steam is supplied (prefer ably- at a predetermined pressure, as later set forth) to the cylinder |21: below the piston there in and exhausted therefrom, the supply and eX haust being controlled by the valve mechanism I6. As will be observed, when steam is supplied sion offtiie'l spring\23_,`whereby the disk 22 will be rotated and swing the valve member 2 to the position shown in dotted lines in Fig. 3. Upon the movement of the rod |2a downwardly, the spring 23 will rotate the disk 22 and swing the rocker 25’ in the opposite direction. `I1" in the return movement of the valve member 2, fuel becomes lodged between it and the inner end wall to the cylinder |2œ to effect pressure on the piston of the olf-set Ib, the band 22a will slip on the therein, the rod V2|] is operated upwardly and 10 disk -without turning it. The outer end of the through the rocker |3œ moves the sleeve 'l' down rocker arm 25a is preferably provided with a wardly to open the valve 4 (see dotted lines in roller to reduce friction between it and the col Fig. 3). The upper end of the cylinder is‘pro lar |8’.` The rocker 25' is preferably provided videdV with a vent Ilœ to permit displacement with a laterally extending arm 25b carrying a of air when the piston is operated upwardly. 15 roller at its outer end in position to be engaged Below the cylinder |2111, the rod 2li is provided by the inner end of a rod 26. The rod 26 is with a collar | 8:12, adjusta-bly held in position screW-threadedly mounted in an internally thereon by a nut |8112’. The collar |851: forms an threaded member 21 fixedly supported on the abutment for a spring lem coiled around the rod casing |,‘whereby the rod 2E may .be adjusted 20 and interposed between the collar and the 20 endwise to swing the rocker about its fulcrum to lower end of the cylinder l 2:1: and arranged to relate the rocker arm 25a to the collar- |8’. By be compressed when the rod 20 moves upwardly, adjusting the rod Vendwise inwardly, the rocker so that when the steam supply to the cylinder 25' will be rocked counter-clockwise (one adjust-> |2az-is cut off, and pressure on the piston relieved, ed position of the rocker being shown in dotted the spring |9a: operates to move the rod 20 down 25 lines in Fig. 2) and position the outer end of wardly to close the Valve 4. A stop is provided the rocker arm 25a in spaced relation to the in the cylinder to limit the downward movement> collar I8’` when the latter is in normal‘position. of the‘piston, so that when the piston is in its Accordingly, when the rocker is adjusted as above normal position, it is above the steam inlet and set forth, the collar I8' will‘move a predeter exhaust port. AThe collar lßsc is preferably ad 30 mined distance before engaging the rocker arm justably ñxed to the rod 2|) in a predetermined 25a and operating, the rocker. By adjusting the position'so that when the valve 4 engages its rod 26, the movement of the rocker 25' and disk seat the spring |950 is under slight tension, the 22 can be regulated to decrease the quantity of effect of which is to seal the valve 4 in closed fuel permitted to gravitate to the compartment position. ‘ 35 5 in‘ each operation of the valve member 2. The agitating and feeding device 2 consists of The bottom annular wall 3 for the compart a member fixed to a rock shaft 2| mounted in ment 5a is preferably provided with an annular the side walls `of the off-set lb and arranged to chamber 3:1: connected with valved inlet and out be oscillated thereby. The agitating member 2 let connections 3x', whereby water may be circu serves as a valve between the chute lc and com 40 lated through the chamber to maintain the wall partment 5 and extends across the off-set Ib, its 3` cool.` Due to contact of the adjacent ring 2a' upper side preferably being flat so that when in with the wall 3, a portion of the heat imparted normal position it closes the lower end of the to the ring 2a’ will be conducted to the wall 3, chute Ic (see Fig. 3) and serves as a support for so that the ring 2a' is maintained relatively cool. the fuel therein, but when rocked to the position As will be observed the valve 40H1,` in position to shown in dotted lines (Fig. 3) it provides between be heated by the combustion taking place in the its inner end and the inner end wall of the off-set producer, but due to the mounting of the valves Ib an opening through which the fuel gravi 4, 4a, I am able to provide for cooling the valve tates into the compartment 5. The outer end 4a in a simple manner. As shown, the valve 4a wall of the off-set is preferably curved on a ra 50 is hollow to provide therein a chamber- 4a’ into dius struck from the axis of the rock shaft 2| which the rod 8 (which is hollow as already set and the outer end of the agitating member 2 is forth) extends. This construction permits the curved concentric to the outer end wall of the provision in the rod 8 of a small pipe 28 suitably off-set Ib, so that no space in which the fuel can connected to a nipple 28a at the upper end of the lodge, between these parts may exist or result rod and extending into the chamber 4a' at its due to oscillation of the device 2. The mecha lower end, the nipple 28a being connected to a nism I0 for operating the agitating or valve mem flexible hose 28a’ -leading from a source of water ber 2 consists of the following: 22 indicates a supply under pressure, the water supplied to the disk fixed to the rock shaft 2| exteriorly of and chamber 4a’ being discharged therefroml through at one side of the off-set Ib. 22a indicates a 60 the pipe 8‘around the pipe 28 and flowing out at flexible band frictionally engaging a portion of the upper end of the rod 8 through a nipple 28h', the periphery ofthe disk 22, the outer end of which is connected by a flexible hose 28221’ `leading the band 'being connected to one end of an ex pansîon spring 23, the opposite end of which is to a drain or sump. ` ‘ The steam supply pipe || is provided with an fixed to an adjustable anchor 23a mounted on 65 adjustable pressure regulating valve 29|, of any the casing | (see Fig. 2). The opposite or inner desired construction, arranged to be set at a pre end of the band 22a is connected through a link determined pressure (preferably at 70 lbs. per 24 to one arm 25 of a rocker 25’ fulcrumed on square inch), whereby the pressure of the steam the casing |, the opposite arm 25a of the rocker supplied to the valve mechanism I6 will at all 25' being disposed inthe path of a collar I8’ on 70 times be uniform. The valve mechanism I6 is the lower end of the sleeve |8a, so that when preferably of the rotary type, and driven through the rod |2a and sleeve move upwardly, the col a suitable reduction gearing 30 by a motor 3|, lar I8’ will swing the rocker V25’ counter-clock which is connected in a circuit 32 to mains 33. wise (as viewed in Fig. 2) and effect a pull on In the herein disclosed application of my in the-"inner `end ofthe band 22a-_ against the ten Ventioirrthe >circuit 32 is.provided `with :a ‘switch www. 25414399 7 32’ which is normally opened, so that` the’fmotor 3|, the valve mechanism I6 and the operating mechanism 9 are normally at rest, but provision is made to automatically close and open; the` switch to start and stop the motor to effect voper ation of these mechanisms dependent‘on the heat of the gases liowing through the ñue a. For this purpose I provide in the flue a an electro-thermo 8 tate clockwise, so that the-steam is sl-llìr?ied> to the cylinder [2:1: to effect operation ofthe-Valve 4 and» exhausted therefrom prior to the supply of steam to the cylinder I2 and operation of the valves 4a, the speed of the valve elements being so regulated that during the period between the cut-olf ofthe steam supply to each pipe I5, I5a, and its exhaust therethrough the valve 1i or 4a controlled thereby remains open long enough to permit gravitation 101 of the fuel from the adjacent compartment. couple a’ set to operate at a predetermined degree of temperature, so that when these gases rise-in Fig. 6 illustrates a modified form of construc temperature, due to >combustion in the producer tion wherein the sleeve ‘I and hollow rod 8, which A, to or above the predetermined degree, the are connected to the valves 4, 4a, respectively, switch 32’ will be operated‘to close the circuit 32 are connected to linkages |393', I3zc”, respective and thus start the motor 3| in operation. The ,- ly, in the manner already set forth andthe motor in turn operates the valve mechanism I5 linkages in> turn are operatedv and controlled by whereby steam is supplied to the`mechanism 9 electrical means to coordinate the movements of to operate the valves 4, 4a, and feeder 2, in co the sleeve and rod in the manner already _set ordinated relation as already set forth, whereby fresh fuel (coal and the like) is delivered to the forth. In this view, 34, 34a, indicate electric compartment 5, then to the compartment 5a and 2.0 motors each connected by leads 35 to suitable iinally fed to the producer a. These operations contacts in a casing 36 having a rotary switch will continue until the temperature of the gases in device therein driven by a motor 31, the device the flue a drops to a point below the predeter and motor being supplied with current from mains mined temperature, whereby the electro-thermo 38, the switch device serving to close one circuit couple a' will open the switch 32' and stop the ¿_ and break the circuit and then to close the other motor. circuit and break it, (a) the closing and opening The valve mechanism I6 comprises a casing I 5a of each circuit being effected during theA period having conically shaped seats into which valve the other circuit is open andv (b) each circuit elements |66, Ißb’, rotatably fit, the inner ends being closed for a period longv enough for the of the latter being connected together by an ir shaft of the adjacent motor 3,4, or 34a, to lmake regular shaped projection |60 fitting a comple one revolution, whereby the sleeve 1 and rod 8 mentary opening formed in the other element. are operated relative to each other in coordinated The element |612 is removably connected to a relation. The linkages |3111', |393”, and their fitting I 5d held in position by a cap, I6e which is operating connection with the motors 34, 34a,v threaded into the adjacent end of the casing Ilia, y respectively, are similar in construction and op a suitable bearing being provided between the eration, so that one linkage and its connection fitting Ißdand cap Iße and an expansion spring with the adjacent motor will be referred to, ISÍ is provided between the bearing and the ad that is, the linkage |333’ connected to the rod’ß. jacent valve element to retain the latter in its This linkage comprises a rocker 39 fulcrumed on seat. The valve element I6b’ is mounted simi a standard 40, and connected at its inner, endV to larly to the valve element I6b, except that the 40 the rod 8. The outer end of the rocker 39 is piv fitting |601 is connected (preferably integrally) otally connected to tie outer end of a sectional to a shaft |69, which is coupled to the shaft 33a member di, the inner end of which is pivotally of the reduction gearing 30 and driven thereby. connected to a crank d2- iixed to the‘shaft of The valve element ISD’ is provided with a’duct the adjacent motor 313. The member M consists |693, whereas the valve element IBb is provided of an inner device lIIa of tubular'form having a with a duct Ißsc’, these ducts being in diametrical reduced innerr portion Mx pivotally connected relation. As'shown in Fig. l, the steam supply at its outer end to the crank @Zand an enlarged pipe II terminates in branches IIa, Ila', each outer portion Msc' enclosing a coiled expansion connected to a port preferably formed in the 50 spring ¿I3` and an outer device Ma’ pivotally con upper wall of the Valve casing Ißa. The valve nected at its outer end to the outer end of the casing is provided (a) at one side with alined rocker 39. The device Ma’ is provided with a ports, one thereof being connected to the pipe I5 head ¿Hb slidably fitting the inner wall of the` and the other being connected to the pipe |5a enlarged portion día" of the device dia and a and (b) at its bottom with alined ports connected to exhaust pipes |5œ, |59t’, respectively, prefer ably leading to the air blast of the- producer? A. 55 stem or shank Mb' which extends into and slid-` ably ñts the reduced» portion Mx of the device. Ma, the spring 4-3 being interposed between the head ¿Ib and a cap-415. which is threaded on the.v of the valve element lëb’during rotation thereof outer end of the device Ma and through which it registers with the ports for the pipes I Ia and I5V the device ela' slidably extends. In this ar 6,0 to supply steam to the cylinder I2 and in another rangement, w’nen current to thelmotor is cut position it registers with the ports for the pipes off, the crank d2 is in the position shown, but I5 and |59: to permit exhaust of the-steam‘to and due to operation of the switch device in the cas through the latter pipe, the ports for the` pipes ing 33, the motor 34 is operated'to effect one I Ia, I5 and I5at- being closed during the remaining rotary movement of the Valve elements, whereas 65 rotation of its shaftl and then stopped, so that the crank d2 swings upwardly and downwardly during the period the ports to the pipes IIa, I5 in making'one revolution. In the upwardy move and |59c are closed, the duct |632' in one position ment of the crank 42 the power of the motor registers with the ports for the pipes IfI'a’ and I5a is transmitted thro-ugh the device dla, head 4Ib to supply steam to the cylinder |29: and in an other position with the port-s for the pipes |50, 70 and device día' to the rocker 39 to move'the rod 8 downwardly and in the downward. movement and I5œ’ to permit exhaust of the steam to and of the crank 42, the power of the'motor 34 is through the latter pipe, the portsA for the. pipes transmittedthrough the device Ma, the engage-r IIa', I5a and |59:' being closed during theremain ment of` the spring 43 with the' head Mb servingk ing rotary movement, of the valve'elements; As shown in Fig.` 5; the: valve elements |619; |611’ ro,-> 7 51 to insure movement of` the rocker 39 therewith. The duct Ißx is so arranged that in one position 2,414,209 . 10 and raising of the rod 8. In this form the fuel is preferably delivered by a feed member such of the invention will suggest themselves without departing from the spirit and scope thereof. My as shown in Figs. 2 and 3, operatively connected to a rocker 25x, which is controlled by a collar disclosures and the description herein are purely The rod |8b' is slidably mounted in brackets 44, provided on the casing l, the upper end of the rod |812' being connected to the lower end of a link |8c, which is connected to and operated by the crank 42 of the motor 34,` whereby feed of the fuel is controlled in co-or dinated relation to the operation of the rod 8; A magnetically operated brake (not shown) may be connected in series in the circuit for each motor 34, 34a, to insure stoppage thereof at the end of each rotation upon cut-off of the current in the circuit. Fig. 5a illustrates a modified form of construc tion for feeding 4fuel from the chute Ic to the compartment 5. The upper side of the feed member 22m is concave and its ,opposite walls ing. illustrative and are not to be in any sense limit i619 fixed to a rod |813'. are concentric to the outer end wall of the off set Ib. The device 22a: is fixed to a rock shaft 2|:c provided with a lever 45, the outer end of which is connected through a coiled spring 23x What I claim is: .1.. In apparatus of the class described,l the com» bination with a gas producer, of an inverted cas~ ing the open end of which is related to the com» bustion chamber of said producer, spaced upper and lower annular walls carried by the side walls of said casing, valves ñtting said walls and form» ing chute therewith for fuel, upper mechanism and lower for feeding compartments, fuel from said chute to said upper compartment, valve op erating members slidably mounted in the top wall of said casing for movement rectilineally axiallyJ of said annular walls, one of said members con~ sísting of a sleeve extending through said wall and connected to the valve fo-r said upper com partment and the other member consisting of a rod slidably ñtting said sleeve and extending therethrough and connected to the valve for said lower compartment, separate iiuid operated to an adjustable anchor 23a', the opposite end 25 means for operating said members in one direc of the lever 45 being connected to the rocker 25', tion, said iiuid operated means consisting of a cylinder, a rod slidably extending therethrough which is operated in the manner set forth in connection with the rocker 25' shown in Figs. 1 and connected at its inner end to the adjacent valve operating member and provided with a pis and 2. In this form of construction the feed member 22:1: is positively operated in one direc 30 ton reciprocable in said cylinder, an abutment tion by the rocker 25’ and in the opposite direc carried by the outer end of said last mentioned rod and a spring interposed between said abut tion by the spring 23:1: which is strong enough ment and said cylinder for moving said rod to to insure return movement of the member 22x operate the adjacent member in the opposite di to its normal position. Provision is made for stopping the motor 3| at a 35 rection, and means for supplying fluid to each of said cylinders to control the operation of said predetermined position corresponding to that members in co-ordinated relation and relative to angular cut-off position of the valve elements |617, each other. IGb’, wherein the steam supplied to the cylinders 2. An apparatus as claimed in claim 1 wherein |2, |2œ, has been exhausted and the pistons there in are in normal position. For this purpose I pro 40 the fluid supply means includes a valve mecha nism for supplying ñuid to one cylinder and its vide auxiliary cut-off means, indicated as en exhaust therefrom during the period that the tirety at 5l) (Fig. 1), for controlling the motor 3 I, supply of the fluid to the other cylinder is cut off. whereby it continues in operation, following the opening of the valve 32' in the manner already 3. In apparatus of the class described, the oom bination of a casing related to a combustion set forth. Of the auxiliary cut-off means 50, 50a indicates a separate circuit connected in the main ‘ chamber and having spaced upper and lower an circuit 32, in shunt relation to the switch 32’ and nular walls therein, valves fitting said walls and forming therewith upper and lower compart supplying current to the motor and connected to ments, a chute for fuel, mechanism for feeding suitable contacts in a switch box 50h, the circuit Sila across these contacts being normally closed 50 fuel from said chute to said upper compartment, by a spring operated movable contact 59h', which a sleeve mounted in the top wall of said casing when operated breaks the circuit 50a. The con for movement rectilineally axially of said annular tact 58h’ is normally disposed in the path of walls and extending through said wall and con movement of the throw provided on a cam 5|, nected to the valve for said upper compartment, a which is adjustably ñxed in any desired manner 55 rod slidably fitting said sleeve and extending to the shaft |69, so that in each rotation ofthe therethrough and connected to the valve for said latter the circuit is opened and closed. So long lower compartment, mechanism for moving said as the main circuit 32 is closed by the switch 32’ sleeve and rod in one direction to move said valves and the motor 3| is operating to effect operation into engagement with said annular walls, and of the mechanism 9, the opening and closing of 60 fluid operated means for operating said sleeve and the separate circuit 50a in the manner above set rod in the opposite direction in co-ordinated rela forth will be ineffective, but following the opera tion and relative to each other, said means in tion of the switch 32' to open the main circuit 32, cluding a valve mechanism for controlling the supply of fluid to said fiuid operated means and the motor 3| will continue to run until the cam 5| operates the contact 5|b' and breaks the cir 65 exhaust of the fluid therefrom, said controllingr cuit 50a. From the foregoing descriptionïgit will „i means consisting of a motor, a source of electric be observed A’that the auxiliary cut-ofi.’ means 50 'i j . current supply, main and separate circuits for said prevents stoppage of the mechanism 9 at ',aïtime \ 'motor connected to electric supply source, means when either piston in the cylinders | 2, |2x','§is`at' i w ‘for opening and closing said main circuit and the upper end of its stroke or either valv'è‘4, 4a, 70 means controlled by said motor for opening said is in open position. ’ .'I‘o those skilled in the art to which mylinven tion relates many changes in construction and widely differing embodiments and applications ’ - separate circuit in a predetermined position of said fluid operated means. DWIGHT M. PALM.