US1595367A - Oil burner - Google Patents

Description

C. H. THORNBLADE Aug 10 OIL BURNER Filed Nov. 19, 1924 2 Sheets-Sheet 1 v INVENTOR Carl H o Thamblade Auk. 10 1926. 1,595,367

. Q C. 'H. THORNBLAD;

OIL BURNER Filed Nov. 19, 1924 2 Sheets-Sheet 2 4 z I 56 t I & I V 3 INVENTOR- Carl Hugo Tharnblade Patented Aug. 10, 19.26.

UETED STATES CARL H. THORNBLADE, OF SEATTLE, 'WASHINGTON.

OIL BURNER] Application filed November 19, 1924. Serial No. 750,879.

My invention relates to oil burners of that type in which is employed a generator heated by the burner ets, and in which the oil is heated to gasification before being discharged.

The object of my invention is to generally improve the character and the operation of such a burner and specifically to produce a design which is a composite burner employing a plurality of independently operable burner devices which may be operated either altogether or separately, as desired, eachbeing designed for its own particular use.

The" special features of my invention which are new maybe determined from a study of the drawings and the following specification.

Theaccompanying drawings illustrate my invention as embodied in the type of construction which I now prefer. It will, however, be evident that this design may be modified in many details without really departing from the spirit of my invention.

Figure 1 is a top or plan view of my burner, having certain portions thereof broken away and in section to better illustrate details of its construction.

Figure 2-is a section taken upon a plane represented by the broken line 22 of Figure 1.

Figure 3 is a section taken substantially upon the plane indicated by the broken line 38 of Figure 1.

The composite burner here illustrated shows two separate burner units, these being of essentially like construction, the principles of their construction and operation being alike. Each of these burners employs a mixing chamber having burner jets mounted thereon, a generator which lies alongside of the mixing chamber and is heated by jets therefrom, and a communicating conduit or passage which conveys the gas as discharged from the generator to and into the mixing chamber. In the burner as illustrated, 1 rep resents the principal burners as a whole, and 10 the secondary or auxiliary burner. The mixing chamber 11 of the main burner is shown asbeing of substantiall square cross section, although the cross sectional shape of this burner may be made anything which best suits the needs ofthe burner. The type of burner employed is that which has a series of circular holes in its walls, in which holes are placed disksl2 which are of a re fractorymaterial and provided with acousiderable number of perforations 13. 7

These perforations produce the discharge of a largenumber of jets of mixed airand vaporized oil and may be. placed at thetop of the burner or the sides, as desired. A series of such'burner jets 13 are shown as placed at oneside of the mixing chamber and these discharge directly upon the generator tube2.

' The generator tube 2 is supported in guides or eyes as 20, formed at the side of the casting which contains the mixing chamber and has at its discharge end a sleeve-21 in which is formed a small jet orifice. This discharges into a fiue or channel l4: formed in this end of the main casting in which the mixing chamber is formed. making a substantially half-circular bend and discharges. into the end of the'mixing chamber. In one side wall of thisfiue is a hole 15, located clo'sealongside of the discharge end of the generator.

Th jet discharged from the generator draws air through the opening 15 to mix therewith and form the combustible gas. To prevent ignition of the combustible gas at the point where is, discharged from the generator, I prefer to employ a flange 16 which constitutes an apron interposed between the air inlet opening 15 and the burner jets. Such apronwill largely tend to pre-' vent the flashing of the flame from the burner jets around to the air inlet opening 15.

The flange 16 may be carried out to such an.

extent to engage the side walls of the fire pot in which the burner is placed. It also serves the purpose of holding thebody of the burner away from the side walls a suiticient amount to prevent undue restriction of the space leading to the air inlet opening 15. That is, by the use of such flange it is impossible to place the burner near enough to the side wall but that ample area for the-supply of air is available.

The particular arrangementof the burner jets relied upon for supplying the heat is largely immaterial. the arrangement of the burner shown I have employed a circular table 17 at each end of the burner, this being provided'with a group of burner jets l3.

1 Beneath the generator 2, which isv in the form of a tube lying alongside the burner, is a priming trough 22, into which may be This curves,

placed gasoline, alcohol or any other easily thissort asjplacedin anordinary cool: stove ignited fluid the burning of which will heat the generator tube sufficiently to gasify the kerosene or other less volatile oil which may be used as the fuel; In prefer to,have the mixing chamber 11 given a slight slope towards the front end of the burner and to connect a pipe as 3 with this end of the burner, to serve as a drain pipe to convey therefrom. any oil which may be passed thereinto- .f'rom the burner, dueto incomplete gasification ort-o condensation in the mixing chamber; I" also prefer to have the-priming trough 22'located sufiicientlybelow' the level of the bottom of" the mixing chamber that any oil which may be found in this mixing chamberwill. flow by gravity into the priming trough where it" will be ignited.

In order to control this discharge pipe a stopcock or valve 30 may be placed therein.

This; stop: cock" be; left permanently open where it'is so connected with the prim:- ing' trough or' may be normally kept,closed, as desired, Ifl'eft open any oilwvhich is left in the mixing chamber will at once flow to the priming; trough and by, action of the side jets 131. will be burnt, thus adding to the heating-of thegenerator; If, therefore, the; generator becomes cooled or is not, suflicientlyheatedto, thoroughly gasify the oil passing therethrough, oil will accumulate in the mixing chamber and will be discharged into the priming trough and by its burningtherein will furnish ad,- ditional heat to the priming tube, and this will tend, to correct the, discharge ofoil into the mixing: chamber so that such irregular-- ity and inperfection of operation tends to correct itself.

The tube: 2' which: forms the generator is mounted in ahole; provided in: an arm, or lug 20, extending from th main burner casting, in such. manner that it may be adjusted lengthwise of itself. A screw 23 orother device may be employed for holding it in adjusted position. I have found by experiment that the position of'the dis charge from the generator tube=relative to the air inlet opening 15 hasan effect upon the 1 action of theburner. By adj listing-the generator tube so that the discharge end thereof is extended'fartherinto the" passage 14', aricher'mixtureis obtained asthe suc= tion: effect produced upon the air is less than when the discharge end of the gen erator is moved fartherback. In. thisway a certain measure; of control may be: had over therichness of the mixture beingemployed.

The secondary burner 10* is of essentially. the same construct-ionas the main burner 1. The generator tube 2, however,,is placed over the mixing chamber and the main heat.- ingsurface; is placed onone side, as is clearly shown im Figure 2. In" a burner-of or range, the secondary burner 10 is placed at the rear Side of the fire pot, where it will directly heat the wall which separates the fire-pot from the oven.

The generator tube 2 of the secondary burner is also located where special burner jets 18 of which two only are shown, will impinge upon one end of the generator tube. These two burner jets are the means employed for priming or preliminarily heating the generator of the secondary burner. As a matter of convenience these two burner jets,

are permitted to burn whenever the main burner is being used. At times it isnot desired to use the secondary burner. In this case the action of the burn r jets 135 would cause the end of the generator tobe overheated and possibly burnt out... To, prevent. such action I provioe a shell, which consists of a piece of sheet metal at, bent into such shape that one end thereof Willembrace and permit it to slide upon the generator 2', while another portion thereof extends downward as a wing which may be interposed between the burner jets l3 and the generator tube. While such a shell may become burnt out, itisvof cheap character and may be easily replaced.

The discharge end 21. of the generator discharges its-jet into a curved tubular, passage, which curves downward and discharges into the mixingchamber 11 of. the secondary burner. Withthisl prefer to form" an air inlet opening, as 50, in the bottomwall of such chamber immediately under the dischargejet. Also a second openh1g5, as 51, isprovided at one side thereof. 1' also provide a flange 52 extending laterally so as to protect these openings, both to prevent their being closed by placing the burner too close to the wall of the re box, and also to prevent the flashing of t'he lame around the cornersso as to ignite the dis charged jet before itenters the mixing chamber. As'further precautionto prevent such action, a plate 58 may be secured to the outeredge of this flange and extend downward so as:to form a thorough protection;

vVith the above type of burner, use of the mainburner 1' will sufiice for ordinary cooking or heating purposes. If, however. the oven is tobe used and thehc'at. provided" by the main burner, is insufficient, the secondary burner may be brought into use. After the secondary. burner has been ig nited, the main burner may be turned oif if a low heat in the oven is desired.

Each of' these burners isprovided with its own'separate oil supply pipe, as 31 and 32. The control of the valves for the two generators is preferably by the use of a key wrench which may be placed upon the squared ends 345 of the valve stems. Sepa- Vtioned at the side thereof which is away from the auxiliary burner, a generator tube for the auxiliary burner positioned at the opposite side of the main burner and above the auxiliary mixing chamber, the mixing chamber for the auxiliary burner having burner jets in its side face which is away from the main burner and the mixing chamber of the main burner having generator heating discharge jets at opposite sides positioned to heat the generator tubes for both burners.

2. An oil burner having a main and an auxiliary burner set, each provided with a mixing chamber having burner orifices in a side face, the mixing chamber of the main burner being located close above and at one side of the mixing chamber of the auxiliary burner, a gen eratoi tube for the main burner located at that side of the main burner which is away from the auxiliary burner, a priming trough below said generator tube, a generator tube for the auxiliary burner located above its mixing chamber and alongside the mixing chamber of the main burner, the mixing chambers of each burner having gas discharge openings positioned to heat its respective generator, and the mixing chamber of the main burner having gas discharge openings positioned to heat the generator of the auxiliary burner.

3. An oil burner having a main and an auxiliary burner set, each provided with a mixing chamber having burner orifices in a side face, the mixing chamber of the main burner being located close above and at one side of the mixing chamber of the auxiliary burner,-a generator tube for the main burner located at that side of the main burner which is away from the auxiliary burner, a priming trough below said generator tube, a generator tube for the auxiliary burner located above its mixing chamber and alongside the mixing chamber of the main burner, curved conduit members connecting the ends of each generator tube with the like end of its mixing chamber and having an air inlet opening at its receiving end, the mixing chambers of each burner having gas discharge openings positioned to heat its respective generator, and the mixing chamber of the main burner having gas discharge openings positioned to heat the generator of the auxiliary burner.

4. An oil burner having a main and an auxiliary burner set each provided with a mixing chamber disposed alongside each other with the mixing chamber of the auxiliary burner immediately below and alongside of the like chamber of the main burner, the mixing chamber of the auxiliary burner having burner discharge openings at the side face which is away from the main burner and generator heating openings in its upper face, a generator tube extending lengthwise of the mixing chamber of the auxiliary burner over the discharge orifices in its upper face, and alongside of the mixing eh amber of the main burner, said latter mixing chamber having burner discharge openings towards one end positioned to heat the generator tube of the auxiliary burner, a protective shield movably lengthwise of said generator tube and adapted to protect it from the said jets from the main burner, and a generator tube alongside of the mixing chamber of the main burner, said mixing chamber having burner jets in its side face for heating its generator tube.

Signed at Seattle, King County, Washington, this 1st day of November, 1924.

CARL H. THORNBLADE.

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