US938670A - Feed system for hydrocarbon-burners. - Google Patents

Description

J. N. LEAGH.

FEED SYSTEM FOR HYDROGARBON BURNERS.

APPLICATION FILED IBB.25,1905.

938,670. Patented Nov. 2, 1909.

2 SKEETBBHEET 2.

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- aal iwmogggp Z 2M4 UNITED sTA'rEs PATENT OFFIGE.

JOHN N. LEACH, 0F MELROSE, MASSACHUSETTS, ASSIGNOB TO J'UDSON L. THOMSON MANUFACTURING COMPANY, 015 WALTHAM, MASSACHUSETTS, A CORPORATION OF MAINE.

FEED SYSTEM FOR HYDROCARBON-BURNERS v Specification of letters Patent.

Patented Nov. 2, 1909.

Application filed February 25,1905. Serial No. 247,270.

hydrocarbon burners and more particularly to a class of such whereinoil under pressure, is fed to vaporizing retorts. I

The main object of the invention is to provide such a system wherein separate burners may be maintained independently of each other in a manner to insure a small, steady and constant flame in the one, and permit the independent control and 'forcin of the other 'to meet all the requirements 0 the use of such a burner.

A further object is to provide such a system wherein-oil will be automatically fed to the pressure tank for; the main or secondary burner fuel supplyfain proportion to the quantity of -oil being consumed, thus maintaining the Epressure in said tank when said burner is in use.

A further object is to combine in a system having the above characteristics, means whereby oil in individual .pressure tanks may be placed under pressure to facilitate the starting of both burners.

A still. further object is to provide means whereby the oil supply and pressure insaid low pressure tank may be replenished and raised from the high pressure tank. .And a still further object is .to provide a system wherein the vapors for the primary burner or torch may be generated apart from the burner, and the initial supply of vapors therefor may be ignitedwithout manual application of a flame to the combustion chamber of said burner.

The invention consists primarily in the combination with a primary burner and a secondary burner having se arate mixing chambers and a common com ustion cham- *ber, of a primary burner vaporizer, means whereby vapors generated therein are given an admixture of'air and discharged into the mixing chamber of said primary burner, a

secondary burner vaporizer, means whereby vapor therefrom is given an admixture 01 air and discharged into said secondary burner mixing chamber, an oil reservoir,'z high pressure tank,- a low pressure tank, oil

conduits connecting said reservoir and sait high pressure tank, said high pressure tanl andsaid secondary burner vaporizer, am said low pressure tank and said primar burner vaporizer, respectively, and mean; whereby the feed of oil from said tanks i;

*individually controlled; and in such othe: vnovel featuresof construction and arrange ment of parts as are hereinafter set fort] and described and more particularly pointe out in the claims hereto appended.

Referring to -the drawings :Figure 1 is 1 plan view illustrating the application of m; invention to asteam carriage; Fig; 2 is side elevation on a larger scale, of the pri mary burner generator, and Fig. 3 is a simi lar view of a portion of the burner showin, the relation of the secondary burner va orizer spraying noz'zle, its mixingtube an the discharge end of the conduit from th primary burner generator. I Like letters refer to like parts throughot the several views. v

Ihave illustrated my invention in conne( tion with a type of burner comprising a outer casing a, divided horizontally by large or secondary burner plate a, and

hollow casting forming a smaller or primar burner plate-a and its mixing chamber, th

,lower portion of thecasing d constitutin a mixing chamber for the secondary bllI'IlG plate a;' and the upper portion of said ca: "mgconstituting a combustion chamber con ,mon to bothsaid burners.

The said burnt plates, with the exception of the burm openings-therein, close the bottom of ti combustion chamber so formed, thus 'pr ventin down drafts which would tend 1 draw t e flames from said chamber. In th combustion chamber, I arrange an overlyir vaporizer 6 formed as a continuous pipe ar in two sections which are-subjecte "-tofgtl secondary and the primary hurner s-rrespe tively. This vaporizer ijs provided with discharge nozzle 12' whichprojects a vap' jet into the mixing tube {a drawing air'ther into in suflicient quantities through the a inlet 0 to cause such an admixture of tl stantially as shown, to form an oil trap to.

gil'event a temporary flooding of the mixin .c amber when the humerus first starte due to all the parts not-having yet become v pressure tank sufiiciently hot; and this trap, I provide with,

a drip cock 0 wherebyit maybe drained.

The feed System proper comprises an oil reservoir (1 a low ressure tank e and a hi h he first of these is mersy a source of oi supplyythe second feeds the generator or va orizer of the primary burner 'or torch, and t e last that o the secondary ormain burner. V I

Qonnectgg the reservoir d-with the high premurc t f is a conduit system compris-l mg the piping g having in its length an oil pump' it w1th check valves g g on opposite sides thereof; a pressure regulator '5 between isaidwalve g? and the tank 7 and a by pass through the first uisite pipe i returning to -the reservoir either ortion' of the conduit 9- by means of a m tiple way joint g, or by an independent connection with said reservoir, if desired. Thepump h is operated from the engine crosshead, or any other desired t pe of power pumpmay be substituted t erefor..

To fill the tank f with oil under the reqressure, I provide'a branch ipe ls contro ed by a valve k having in itsiength a hand pump 1' arranged between the check valves 70* k, the opposite ends of the said pipe in respectivel tapping the section -g, and feeding direc y into the said tank.

7'indicatesthee 'e. i The tank e may filled in an desired manner, as throu h the norm y closed opening e, and o' therein is placed under pressure through the valve m and an ordinary detachable hand air pump not shown.

Preferably, however, after the burner system has been once run, I- fill this tank through a pipe connection m between it and the tank f, which contains a valve m in its j length. In case of the said tank e containing a large quantity of oil with a small air cushion, the valve m is preferably used to avoid the elimination of this cushion. The air cushion in this tank is not subject to the variation of that of the hi h pressure tank, inasmuch as the flow of o from this tank is very slow, the flame maintained thereb while constant, being comparatively sma and of uniform force.

The piping heretofore described, as well as all other oil feed pipingmhereinafter referred to, is of small gage, ing from 1/16 to 1/8 inch piping.

The drawmgs are merely a conventional showing of the invention, it being impracticable with'so small. a scale to preserve the proper proportions of the various parts, and

permit a photographic reproduction of the drawings.

Having described the feed system as to i for convenience of expression as representing the burner which not only is first started, but whichis of the first importance in the maintenance of the entire burner, irrespective of its function in generating vapors or gases, or producing calorific force, is in the form of the invention shown, fed through a vapor conduit 0 withgases generated in a remote generator p. This generator having been made the subject matter of another application pending concurrently'herewith, I will not describe it in detail beyond enumerating its various parts and desi atin them by reference letters. It comprises a urner plate having a mixing chamber contained within a cylindrical casing 12' which casing extends considerably above said burner to form an inclosed combustion chamber. An upright vaporizer p passes through this plate, and its mixing and combustion chambers, and projects above the casing into a mixing tube 1), wherein thevapors generated in said vaporizer are admixed with air and fixed. Suitable connections p are provided by which a portion of t e gas is diverted to maintain a flame above said burner plate, the greaterportion of these gases," however, being conveyed through the conduit 0 to the primary burner. Oil is fed to the vaporizerp from the the tank 0 through .the small feed pipe e having in its length the controlling va ve e. The feed of oil to the vaporizer b is throu h the small feed pipe f having in its lengt a controlling valve f and a ressure regulator which is also connect with the boiler in cated in dotted lines in Fig. 1 so as to automatically cut out the 'oil feed to the secondary or main burner vaporizer b when the boiler pressure has reached a predetermined point below the blow out. p I provide suitable pressure filagps r 1" connected respectively with the 'g and with the low pressure tank, and arranged at a point convenient for inspection. Preferably these gages, as well as the enerator p are mounted on the foot board in front of the chaufiers seat.

To insure the ignition of the gases passconnect same with a suitable R v orfi coil and battery 8." by wires 8 s, a switch 8 put out of circuit exceptlwhen the burner is to be ignited- The valves m and switch a are preferably mounted so as to be ing through the burner aat starting, I pro- 7 vi e within the casing a a spark plu s andv i being arranged to permit the said coil being f and the i accessible from the outside of the chauffeurs seat, being what are termed seat control I partially filled with oil, kerosene being preferably used, an air cushion of preferably from 20 to 30 pounds is placed thereon by a hand pump in conjunction with the valve m, the gage 1" indicating when the desired pressure is reached. The vaporizer p is then heated to a dull red heat by a hand torch, the valve 6 thereafter being slowly opened and closed several times. The Rum hkorlf coil is then placed in circuit and the valve 6 is opened and left so, thus maintaining a permanent flame in the generator p as well as providing a constant'ilow of gas to the pri'mary burner through the conduit 0. These gases are instantly ignited from the spark plug awhen they enter the combustion chamber, thus avoiding a possible accumulation of such in the combustion chamber aboutthe boiler. When the primary burner is ignited, the said coil is again put out of circuit. The hand pump Z is then used to fill the high pressuretank f, the valve 70 being temporarily opened for this purpose. When the pressure as indicated by the gage 1", in this tank is about. 120 pounds, the valve f may be opened at any time to start the main fire, a portion of the vaporizer I) being constantly heated by the flame from the burner a to a degree to insure the instant volatiliz'ation of the oil therein or of the greater part thereof. The ignition of the admixture of said vapor and air occurs immediately when it enters the combustion chamber, from said flame also. In case of the blowing out of an oil spray prior to the complete volatilization of the oil passing through the said vaporizer, such will accumulate in the trap formed by the mixing tube 0 and prevent the flooding of the mixing chamber as well as the fumes which ordinarily arise from burning oil.

Pressure in the said tank is maintained by the hand pump Z until a sufficient head of steam is obtained to run the car, whereupon the valve is is closed and the pump it thereafter relied upon to keep up said pressure through therunning of the engine j. The regulator 2' is set at the pressure desired in the high pressure tank f and when the pressure. reaches this maximum point, the oil is by-pa'ssed through the piping z" to the res-en voir (Z or pump h. When the boiler pressure reaches the desired maximum pressure,

which ordinarily isfrom 400 to 500 pounds, the regulator f immediately cuts out the main fire automatically. It will thus be observed that 'llIldQIKilll conditions, oil is fed to the vaporizer I) under substantially the same pressure, insuring an even quantity of feed, variable only under the control of the valve f and a resulting uniform production and consumption of gases. The conditions of use of the primary burner are substantially the same at all times, as the consumption of oil from the tank a is so small as to not appreciably reduce the pressure therein in several hours, thus maintaining a low, constant flame from the burner 64 which not only acts continuously upon the vaporizer b to initiate at all times the generation of vapors therein, and as an ignition torch within the combustion chamber, but to maintain a low boiler pressure when the engine is not running and the main burner is cut out, it having been determined that in -a small fire tube boiler, this flame alone will hold the pressure at about 350 pounds for several consecutive hours. If at any time, when oil underpressure is in the tank f and the pressure in the tank 6 is found to have dropped below that desired, oil may be transferred from the high pressure to the low pressure tank to raise the pressure in the latter, by simply opening the valve m".

While particular advantage accrues from the type of burner herein shown and described, I do not describe such, as the combination of this burner is made the subject matter of other applications for Detters latent pending concurrently herewith.

I have described this system in connection with a detached primary burner generator,

but I do not desire to limit my feed system to this particular location of the primary generator as it may be located in any usual or desired relation with the main burner.

It is sometimes found that the pump h will become air bound when the by-pass i" claim as new and desire to have protected by Letters Patent is v 1. The combination with an apparatus for generating and burning gas from hydrocar-' bons embodying a pilot vaporizer and a main vaporizer; of-a fuel feed system comprising an oil reservoir, a high pressure tank, a low pressure tank connected to said reservoir to receive its supply therefrom, oil conduits connecting said reservoir and said high pressure tank, said high pressure tank and said main vaporizer and said low 'pressure tank and said pilot vaporizer, respectively,

maintain the and means whereby the feed of oil from said tanks to said Vaporizers is separately controlled;

2. The combination with an apparatus for generating and burning gas from hydrocarbons embodying a pilot vaporizer and' a main vaporizer; ofa fuel feed system comprising an oil reservoir, a high pressure tank,

' a low pressure tank connected to said reservoir to receive its supply therefrom, oil

conduits connecting said reservoir-and said high pressure tank, said high pressure tank and said main'vaporizer, and said low pressure tank and sa1d pilot vaporizer, respec tively, means-whereby the feed of oil from said tanks to said Vaporizers is separately controlled, and means whereby oil is automatically fed to said high pressure tank to res'sure therein.

3. The com ination with an apparatus for generating and burning gas from hydrocarbons embodying a pilot vaporizer and a main vaporizer; of a fuel feed system comv prising an oil reservoir, a high pressure tank,

a low pressure tank connected to said reservoir to receive its supply therefrom, oil conduits connecting said reservoir and said high pressure tank, said high pressure tank and said main vaporizer, and said low pressure-tank and sa1d pilot vaporizer, respectively, means whereby the feed of oil from said tanks to said vaporizers is separately controlled, and a pressure regulator and bypass system in conjunction with said means, whereby the maximum pressure in said high pressure tank may be regulated.

A. The combination with an apparatus for generating and burnin gas from hydrocarbons embodying a p ot vaporizer and a main vaporizer; of a fuel feed system com-, prising an oil reservoir, .a high premure tank, a lowpressure tank connected to said reservoir to receive its supply therefrom,

' oil conduits connectin saidreservoir and said high pressure tan said pressure tank andisai ain va orizer, and said low .pressure tank and sai pilot va orizer, re-

spectively, means where y the eed of the 011 from-said tanks to said Vaporizers is separately controlled, and an oil pump having suitable. check valves in connection therewith arranged in the conduit connecting said high pressure tank and said reservoir.

5. The combination with an apparatus for generating and burning gas from hydrocarbons embodying a pi ot vaporizer and a main vaporizer; of a fuel feed system .comprising an oil reservoir, 9.] igh pressu're tank,

a low pressure tank connected to said reservoir to receive its supply therefrom, oil conduits connecting said reservoir and said high I pressure tank, said high pressure tank and said main vaporizer, and said low pressure tank and said pilot vaporizer, respectively,

means whereby the feed of the oil from said tanks to said Vaporizers is separately controlled, an oil pump having suitable check valves in connection therewith arranged in the conduit connecting said high pressure tank and said reservoir, a pressure regulator, and a bypass system arrangedin and in conjunction with said'conduit-con necting said high pressure tank and reservoir. 7

6. The c'ombination with an apparatus for generating and burn' gas from hydrocarbons embodying a pilot vaporizer and a main vaporizer; of a fuel feed stem comprising an oil reservoir, a ressure tank, a low pressure tank connecte to said reservoir to receive'its supply therefrom, oil

7. Thecombination with an apparatus for enerating and burning gas from hydrocarons embodying a pi ot vaporizer and a main vaporizer; of a fuel feed system comprising an oil reservoir, a high pressure tank, a low pressure tank connected to sa1d reservoir to receive' its supply therefrom, oil conduits connecting said reservoir and said high pressure tank, said high pressure' tank, and said main vaporizer, and

said low pressure tank and said pilot vaporizer, respectively, means whereby the feed of oil from saidtanksto said vaporizers is separatel controlled; an Oll pump having suitable c eck valves in connection therewith, a pressureregulator, and a bypass system arranged in and in conjunction with the conduit connecting said pressure tank and said reservoir; sai

means for controlling the oil feedfrom said high pressure tank comprising a controllin valve and a pressure regulator arranged in e conduit between sa1d high pressure tank and said main vaporizer; a boiler receiving its heat from said apparatus, and connections between said last-named regulator and said boiler.

8. The combination with a hyd burning. apparatus having:;a pilotiva and a main vaporizer; -fu' tem com rising an oil reservoir;z a high res-i sure ta a low pressure" tank, oil, con connecting said reservoir andsaid high pres- 2- sure tank, said high-pressure and sa1d bons embodying a pilot vaporizer and a main main vaporizer, and said low pressure tank and said pilot vaporizer, respectively, means whereby the feed of oil from said tanks to said vaporizers is separately controlled, and a pipe connection between said high pressure tank and said low pressure tank having in its length a controlling valve.

9. The combination with an apparatus for generating and burning gas from hydrocarvaporizer; of a fuel feed system comprising an O1]. reservoir, a high pressure tank, a low pressure tank connected to sa1d reservoir to receive its supply therefrom, oil conduits connecting said reservoir'sand said high pressure tank, said high pressure tank and said main vaporizer, and said low pressure tank and said pilot vaporizer, respectively, means" whereby the feed of oil from said tanks to said Vaporizers is separately controlled, and means whereby oil in said low pressure tank may be placed under pressure.

10. The combinatlon wlth for generating and burning gas from hydrocarbons comprising a main burner having a main vaporizer, a pilot burner, and a genera-tor including a pilot vaporizer remote from said pilot burner; of a fuel feed sys tem comprising an oil reservoir, a high pressure tank, a low pressure tank, oil conduits connecting said reservoir and high pressure.

tank, said high pressure tank and said main vaporizer, and said low pressure tank and said pilot vaporizer, respectively,'and means whereby the feed of oil from said tanks to said main vaporizer and said pilot vaporizer is separately controlled.

11. The combination with an apparatus for generating and burning gas from hydrocarbons comprising a mam burner having a main vaporizer, a pilot burner, and a generator lncluding a pilot 'vaporizer remote from said pilot burner; of a fuel feed sys-- tem comprising an oil reservoir, a high pressure tank, a low-pressure tank, oil conduits.

connecting said reservoir and high pressure tank, said high pressure tank and said main vaporizer, and said low pressure tank and said pilot vaporizer, respectively, 'means whereby the feed of oil from said tanks to said main vaporizer and said ilot vaporizer is separately controlled; an oi pump having suitable check valves in connection therewith, a pressure regulator, and a by-pass system arranged in and in conjunction with the conduit connecting said high pressure tank and said reservoir; saidmeans controlling the oil feed from said high pressure tank comprising a controllin valve and a pressure regulator arranged 1n the conduit between said high pressure tank and said main vaporizer; a steam boiler'heated by said burners, and connections between said boiler and said last-named regulator.

12. The combination with an apparatus comprising a controlling valve and a presan apparatusfor generating and burning gas from hydrocarbons embodying a pilot vaporizer and a main vaporizer; of a fuel feed system comprising an oil reservoir, a high pressure tank, a low pressure tank co cted to said reser voir to receive its supply therefrom, oil con duits connecting said reservoir and said high pressure tank, said high pressure tank and said main vaporizer, and said low pressure tank and said pilot vaporizer, respectively, means whereby the feed of oil from said tanks to said Vaporizers is separately controlled; an oil pump having suitable check valves in connection therewith, a pressure regulator, and a by-pass system ar-. ranged 1n and imccnjunction with the conduit connecting said high pressure tank and said reservoir; said means for controlling the oil feed from said high pressure tank' .85 sure regulator arranged in the conduit between said high, pressure tank and said main vaporizer; a boiler receiving its heat from said apparatus, connections between said last named regulator and said boiler, and a branch pipe drawing oil from said reservoir and discharging into said high pressure tank having arranged therein a controlling valve and a hand pump provided with suitable check valves. v .95

13. The combination with an apparatus for generating and burning gas from hydrocarbons comprising a main burner hav ng a main vaporizer-1, a pilot burner, and a nerator including a pilot vaporizer remote om said pilot burner; of a fuel feed sys-' tem comprlsing an oil-reservoir, a high pres sure tank, a low pressure tank, oilrconduits connecting said reservoir and high pressure tank, said high pressure tank and said main vaporizer, and said low pressure tank and said pilot vaporizer, respectively, means whereby the feed of oil from said tanks to said main vaporizer and said pilot vaporizer is separately controlled, an oil pump having suitable check valves in connectlon therewith, a pressure regulator, a by-pass system arranged in and in conjunction with the conduit connecting said high pressure tank and said reservoir, said means controlling the oil feed from said high pressure tank comprising a controlling valve and a pressure regulator arranged in the conduit between said high pressure tank and said main vaporizer, a steam boiler heated by said burners, connections. between said boiler and said last-named regulator, and a branch pipe drawing oil from said reservoir and discharging into said high pressure tank having arranged therein a controlling valve and a hand pump provided with suitable check valves.

14. The combination in a feed system for a hydrocarbon burner apparatus embodyin a a main and a pilot vaporizer; of anoi reservoir, :1 high-pressurtank coiifited to said oil reservoir to receive its supply therefrom, a low'pressure tank adapted to receive its supply from said reservoir, conduits connecting said tanks and said Vaporizers, respectively, and means whereby the feed of 011 from said tanks is separately controlled.

15. The combination with an apparatus for generating and burning gas fram hydrocarbons embodying a pilot vaporizer and a main vaporizer; of a fuel feed system com prising -an oil reservoir, a high pressure tank, a low pressure tank connected to said reservoir to receive its supply therefrom "through said high pressure tank, oil'conduits connecting said high pressure tank and {said main va orizer and said low pressure and sald pilot vaporizer, respectively, and means whereby the feed of oil from said tanks to said Vaporizers is sepa-- rately controlled.

16. The combination with an apparatus.

for generating and burning gas from hydrocarbons embodying a iplilot vaporizer and a main vaporizer; of a el feed system comprising an oil reservoir, a high pressuretank, a low pressure tank connected to said reservoir to receive its supply therefrom through said high pressure tank, oil conduits connecting sald high pressure tank and said main vaporizer, and said -'low pressure tank and said pilot va orizer, respectively, means whereby the fee of oil from said tanks to said Vaporizers is separately controlled, and means whereby oil 1s automatically fed to said high pressure tank to maintain the pressure-therein.

17. The combination'with an apparatus for generating and burning gas from hydrocarbons embodyin a ilot va orizer and a main vaporizer; 0% a i uel fee system comprising an oil reservoir, a high pressure tank,

a low pressure tank connected to said reservoir to receive its supplly therefrom through said 'high pressure ta oil conduits connectmg sa1d high ressure, tank and said I main vaporizer, an said low pressure tank and said pilot va orizer, respectively, means whereby the fee of oil from said tanks to said Vaporizers is separately controlled, and apressure regulator and by-pass system in conjunction with said last-named means, whereby the maximum pressure in said high pressure tank may be regulated.

18. The combination with an apparatus for generating and burning gas from hydrocarbons embodying a pilot va orizer and a main vaporizer; o a el fe system comprising an oil reservoir, a high pressure tank, a low pressure tank connected to said reservoir to receive its supply therefrom through said high pressure tank, oil conduits con- 'neeting. said. high ressure tank and said main vaporizer, an said low pressure tank and said pilot vaporizer, respectively, means a low pressure tank connecte arm valves in connection therewith arranged the conduit connecting said high pressure tank and said reservoir;

19.- The combination with an apparatus for generating and burning gas from hydrocarbons embodying a pilot vaporizer and a main vaporizer; of a fuel fee system comprising an oil reservoir, a high pressure tank, a low pressure tank connected to said reservoir to receive its supply therefrom through said high pressure tank, oil conduits connecting said high ressure tank and said main vaporizer, amfsaid-low pressure tank and saidpilot vapii'r'izer, respectively, means whereby the feed of the oil from said tanks to said Vaporizers is separately controlled, an oil pump having suitable check valves in connection therewith arranged in the conduit. connecting said high pressure tank and said reservoir, apressure regulator, and abypass system arranged in and-in conjunction with said. conduit connecting said high pressure tank and said reservoir.

20. The combination with an apparatus for generating and burning gas from hydrocarbons embodyin a pilot va ori'zer and a mainvaporizer; 'o a fuel fee system comprising an oil reservoir, a high pressure tank, a low pressure tank connected to said reservoir to receive its suppl therefrom through said high pressureta' oil conduits connecting said high ressure tank and said 1118.111 vaporizer, an said low pressure tank and said pilot vaporizer, respectively, means whereby the feed of oil from said tanks to said vaporizers is separately controlled,

means whereby oil is automatically fed to said high pressure tank to maintain the pressure thereln, and a branch ipe drawing oil from said reservoir and discharging. into said high pressure tank havin therein a controlling) valve and a and pump provided with suita le check valves.

21. The combination with an apparatus for generating and burning gas from hydrocarbons embodying a pilot vaporizer and a main vaporizer ;'of a fuel feed system comprising an oil reservoir, a high ressure tank,

to said reservoir to receive its supply therefrom through said high pressure tank, oil con- .duits connecting said high pressure tank and said main vaporizer, and said low pressure tank and ,said pilot vaporizer, respectively, means wherebythe feed of oil fromsaid tanks to said Vaporizers is separately controlled; an oil pump havin suitable check valves in connection therewlth, a pressure regulator, and a bypass system arranged 1n and in conjunction wlth the conduit connecting said high pressure tank and said reservoir; said means for controlling arranged I wli ei'ebythe feed of the oil fromsaid tanks the oil feed from said high pressure tank comprising a controlllng valve and a pressure regulator arranged in the conduit between said high pressure tank and said main vaporizer; a boiler receiving its heat from said apparatus, and connections between said last-named regulator and said boiler.

22. The combination with an apparatus for generating and burning gas from hydrocarbons einbodyin a pilot vaporizer and a main vaporizer; 0 a fuel feed system comprislng an Oll reservoir, a hlgh pressure tank, a low pressure tank connected to said reservoir to receive its supply therefrom 'main vaporizer; of a fuel feed system comprising an oil reservoir, :1 high pressure tank,

a low pressure tank connected to said reservoir to receive its supply therefrom through said high pressure tank, oil conduits connecting said high pressure tank and said main vaporizer, and said low pressure tank and said pilot vaporizer, respectively, means whereby the feed of oil from said tanks to said vaporizers is separately controlled; an

-oil pump having suitable check valves in connection therewith, a pressure regulator, and. a by-pass system arranged in and in conjunction with the conduitsconnecting said high pressure tank and said reservoir; said means for controlling the oil feed from said high pressure tank comprising a controlling valve and a pressure regulator arranged in the conduit'between said high pressure tank and said main vaporizer; a boiler receiving its heat from said apparatus, connections between said last-named regulator and said boiler, and a branch pipe drawing oil from said reservoir and discharging into'said high pressure tank having arranged therein a controlling valve and a hand pump provided with suitable check valves.

In witness whereof, I have hereunto affixed my signature this 24th day of February, 1905, in the presence of two subscribing witnesses.

, JOHN N. LEACH. Witnesses:

N. L. FROTHINGHAM, A. A. ASHMAN.

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