US2321169A

US2321169A - Burner assembly for ranges

Info

Publication number: US2321169A
Application number: US316106A
Authority: US
Inventors: Boyd W Tullis
Original assignee: Coleman Lamp and Stove Co Ltd
Current assignee: Coleman Lamp and Stove Co Ltd
Priority date: 1940-01-29
Filing date: 1940-01-29
Publication date: 1943-06-08
Anticipated expiration: 1960-06-08

Description

B. w. -rums i 2,321,169

BURNER ASSEMBLY FOR RANGES June s, 19543.

INVENTOR liz! BY p Junes,f1943 Bwwms r 2,321,169

BURNER ASSEMBLY FOR RANGES Filed Jan. 29, 1940 3 sheets-sheet 2 INVENTOR ATTOR EY Patented June 8, 1943 prima s T ATaN or-'Fic BURNER Assemini' Fon aimons Boyd w. "ruins, wichita, kann.. mignonto The Coleman Iam and Stove Company, Wichita, Kans., a corporation of Kansas Application January 29, 1940, Serial No. 316,106

6 Claims. (Cl. 126-.-44)

This invention relates to a burner assembly for cooking ranges adapted for installation within and structure which is economical to produce and capable of ready assembly, thereby reducing cost of the range to the purchaser.

Other objects of the invention are to provide symmetrical arrangement of the burner valves; toprovide interchangeable valve parts for facilitating repair and replacement; to provide burner units designed to facilitate machining of the valve seats and related parts; to provide burner and valve bodies in one unitary casting; to `provide a common support of the burner units of the cooking top; to provide a burner structure equipped with a drain for 'automatically discharging excess liquid portions of the fuel; and

to provide burner units having integral attachments for the connecting pipes of the respective units.

It is a further object of the invention to provide a burner assembly with a generator-unit having the control valve on substantially the same horizontal plane as the control valves of the burners.

Another object of the invention is to provide a burner assembly including a drip pan for mounting all the parts to facilitate assembly of the burner units exteriorly of the range.

In accomplishing these and other objects of the invention, as hereinafter pointed out, I have provided improved details of structure, the preferred form of which is illustrated in the accompanying drawings,vwherein:

Fig. 1 is aperspective view of a range equipped with a burner assembly constructed in accordance with the present invention and showing the grids of the cooking top removed and with parts of the range casing broken away to better illustrate the burner assembly.

Fig. 2 is a partial section through the upper portion of the range on the line 2--2 of Fig. l, particularly illustrating the fuel 'supply tank, generator tube, atomizing device, and mixing chamber for delivering fuel vapor to the respective burner units.

Fig. 3 is a horizontal section through the top of the range showing arrangement of the burner parts, including the ow passages, and valves.

Fig. 4 is a detail perspective view oi' the burner assembly as it appears before insertion in the range.

Fig. 5 is a detail cross-section on the line 5 5 of Fig. 3, particularly illustrating the method of attaching the generating unit to the burner as` sembly. I

Fig. 6 is a section through the master burner.

Fig. '1 is a section through one of the, auxiliary `burners of the cooking top.

Fig. 8 is a sectional view on the Fig. 7.

Fig. 9 is a plan view of theburner shown in Figs. 7 and 8.

Referring more in detail to the drawings:

I designates a range of the type described for installation in confined and restricted spaces.

line I-l i The range includes a sheet metal casing 2 having an oven compartment 3, a fuel tank compartment 4, a cooking top burner compartment 5 iocated above the oven and tank compartments, and a burner compartment 6 located below the oven. The' burner compartment hasa bottom l and removable grids 8 which form the cooking top of the range.

The burners supplying the cooking top are.

shown as three in number, s, I, and iiy'ihe burner 9 constituting the main burner is-a'sso-v ciated with a generator burner I2 and is a part of a unit I3. The auxiliary burners `It and il include a second unit Id. For convenience both l unitsare mounted upon a tray or pan I5 whiclif is secured to the bottom 1 by suitable fastening devices le.' f

The unit I3 includes a .casting Il having hol low, duct-like arms I8 and I9 arranged with par-` allel axes located in the same horizontalplane.

' The arm I8 Iis shapedto constitute a mixing .chamber 2B including a portion 2l having an axialopening in the iront thereof for passing the tip 23 of a generator tube 24 and having side openings 251-26. for the admission of combustionl supporting air.

The mixing chamber. neck portion 2l forming a venturifhaving its constricted end 28 connected by a substantially U- shaped passage 29 with the duct ofv the.v arm i9 as clearly shown in Fig. 3. Also `formed as a part w of the casting and extending thereirom'inaalign-zment with the passage 28 is a lateral branch 36 also includes a tapered having a valve chamber 3l provided with a port 32 with the axis thereof extending parallel with the axes ci' the arms I9 and I9 and which connects with an integral fitting 33 having a downwardly opening threaded outlet 34, for a purpose later described.

Encircling the port 32 is a valve seat 35 aligning with an internally threaded opening 35 at the front of the valve chamber 3i and which is closed by a plug 31 having an axial threaded opening 35 to mount a valve stem later described. Formed in the bottom of the mixing chamber arm I and sloping rearwardly in reverse direction to the walls of the venturi is a drain channel 39 curving toward a sump 49 that is provided in the bottom of the U-shaped passage 29, the sump being formed as an integral part of the casting and having an outlet in the bottom thereof to connectwith a drain pipe 4I. Also connected with the sump is a downwardly sloping channel 42 leading from the branch 39 which connects the mixing chamber with the valve chamber 3|. The arm I9 extends forwardly of the arm I5 and terminates in a valve chamber 43 having connection with the passage in the arm through a port 44 encircled by a valve seat 45. The front of the valve chamber also has an internally threaded opening mounting a plug 49 which in turn is provided with a threaded opening 41 similar to the plug previously described.

Projecting upwardly from the valve chamber is a collar 49 seating a reflector 49. 'I'he reflector 49 is substantially bowl-shaped and has a circular rib 59 spaced from an inset boss 5I which is provided with an opening 52 in aligning registry with the opening in the collar 45. Seated on the rib 59 is a series of preferably alternate corrugated and dat rings 53 and 54 retained in position by a plate 55. The plate 55 has depending fingers 55 engaging the inner peripheries of the respective rings to keep the rings centered with respect to the reector 49 and opening 52. The reflector, rings 53-54. and plate 55, are retained onV the seat of the collar by a screw 51 extending through an opening in the plate 55 and into a threaded opening 55 of a spider 59 which bridges the opening through the collar 45'. 'I'he reilector and parts of the burner body, are thus supported directly on the valve chamber and are securely retainedin assembly thereon by means of the single fastening device 51. 'Ihe spacing between the rings afforded by the corrugations provides outlet for the discharge of vaporized fuel delivered through the valve port into the valve chamber, secondary air being supplied through openings 59 in the bottom ofthe reflector. The arm I 9 is provided on opposite diametrical sides thereof at a point to the rear of the valve chamber with bosses 5I and 52 respectively, the boss 5I having a threaded opening 93 therein to receive a pipe 54 connecting the auxiliary burner unit I4, later described. 'Ihe boss 92 on the opposite side has a recessed seat 55 for a spacing nipple 55. the opposite end ofwhich is received in a similar recess 51 of the generator burner I2, it having been necessary to form the generator burner of a separate part to conform to best foundry practice in that the pattern forming the arms I5 and I9 may be divided horizontally for core purposes. 'I'he lower level of the generator burner would not permit of removal of the pattern if it werecast as an integral part of the arm I9.

The generator burner includes an elongated.

hollow casting of substantially L-shaped crosssection as best shown in Fig. 5, the vertical arm 59 of which connects through the nipple with the arm I9 so that fuel`is delivered therethrough to the horizontal portion 19 of the casting for discharge through jet openings 1 I against a side of the generator tubeI the Jets being preferably formed by alternate flat and corrugated strips of material similar to the construction of the burner rings. 'I'he fuel is lighted through an opening 12 in the reilector, and the llame (known as a sub-flame) is preferably protected by an angle-shaped shield 13 having a leg 14 attached in spaced relation to the side of the burner and having a horizontal leg 15 extending overthe top of the generator tube. The portion thereof extending under the reflector is notched, as at 15, in registry with the opening 12 and the side edges 'thereof are provided with ears 11 extending upwardly through the opening 12 to retain alignment of the reflector opening with the notch 15. The generator humer is anchored to the arm I9 by means of a bolt 15 extending through the vertical leg of the humer casting through the nipple 55 and through an opening 19 in the boss u. The head so of the bolt is preferably eountersunk in the side face of the generator burner casting. 'I'he threaded shank of the bolt extends through the opening 19 to mount a draw-4 nut 5I, suitable gaskets 52 having been preferably inserted in the bottoms of the recesses at the ends of the nipple so as to avoid leakage of vapor or liquid fuel through these connections.

It is thus obvious that th spacing nipple not only forms a duct for delivery of vapor to the generator, but it also provides for proper spacing and location of the generator burner with respect to the arm I9.

Cooperating with the

valve seats

35 and 45 are disk-

like valves

54 and 55 attached to

valve stems

55 and 81 having threaded

portions

59 and 59 mounted in the openings of the

respective plugs

31 and 45. The stems project through the front of the casing and are provided with

handwheels

99 and 9|. The generator is connected through a valve 92 and fuel atomizer 92' used in initially lighting the burners, with a fuel supply tank 93 carried in the compartment 4 of the casing. The

valve 92 has an actuating stem. 94 extending through a notch 95 in the front of the casing in substantially horizontal alignment with the valve stems 55 and 51. The burner unit also includes a lug 95 'extending laterally from the arm I9 at a point below the main burner which is adapted to connect by a fastening device 91 with a bracket 95 carried by the tray I5. The rear of the unit may have a lug 99 extending therefrom which may be secured to the back of the casing by a fastening device |99.

The auxiliary unit I4 includes the auxiliary burners I9 and II which are arranged o'ne directly in front of the other in spaced relation with the burner 9 which provides an arrangenection through a valve port |08 in the partition |05 which connects with a valve chamber |09 controlling fiow of vapor through an arm |I leading to the burner I0. The valve chamber |06 has a similar port opening rearwardly thereof and connecting with a duct ||2 leading to the burner |I. Encircling the ports |08 and are seats ||3 and ||4 located in the same vertical plane so that the seats may be faced with a single setting of the casting. With this arrangement the valve chamber |06 substantially aligns laterally with the valve chamber |09 and is directly connected with the offset passageway |03 which in turn connects with the passageway |00 through the port, |08 of the valve chamber |09. Located in lalignment with the respective seats are threaded openings and ||6 closed by plugs ||1 and ||8 having threaded openings i9 and |20 therein to mount the threaded stems |2| and |22 which carry disk type valves |23 and |24 for controlling flow of vapor through the respective ports. The stems project through the front of the casing in substantially the same horizontal plane as the valve stems previously described and are provided with hand-wheels |25 and |26. The arm ||0 and duct ||2 terminate in bowls |21 and |28, having open tops on which are seated rings |29 forming outlets and which are retainedV in position by plates |30 secured to spider-like bridges |3| similar to the attachment of the ring elements of the burner previously described. The reflectors |32, however, include ring-like lmembers arranged toiit over the rim of the bowls and which are spaced therefrom to provide substantially annular air passageways |33. The reflector rings are retained in position by fastening devices |34 extending through slots |35 in the inner edges of the reflectors and into threaded sockets |36 formed in bosses |31 projecting from the sides of the bowls. The bowls have 'laterally extending lugs |38 and |39 provided with slots |40 through which fastening devices .such as bolts |4| are inserted to connect the burner unitV with brackets |42 and |43 that are securedto the tray l5.

The oven burner |44 consists of an elongated casting having an vopen top closed by a series of flat and corrugated strips |45 and |46 to form outlets similarly to the construction of the generator burner previously described. The forward end of the casting has a lug |41 engaged in an opening |08 of a plate |49 attached to a support onthe bottom of the burner chamber 6. Integrally connected with the opposite end of the casting is an ell |5| to which is integrally connected a lug |52 having legs |53 engaging the burnersupport. The burner thus described is supplied with fuel through the fitting 33, through a pipe |54, that is threaded into the opening 36 and which extends downwardly in the corner of the compartment 0 and terminates substantially at the level of the oven burner in an ell fitting which i's connected with the fitting |5| by a pipe |56.

In assembling the burner units the generator burner is attached to the arm I9 by the bolt 18 which is passed through the openings therefor valves, valve stemsy and burner elements of the other units are similarly assembled and connected with the unit I3 by the pipe 64. The pipe |54 carrying the ell fitting |55 is then screwed into the threaded outlet 34 of the part 33. The lugs 96, |38 and |39 are connected to the respective brackets on the tray |5 so that the entire assembly may Fbe applied in the burner chamber and secured by the fastening devices I6. It is obvious that this arrangement facilitates the assembly in that the burner, manifolds, valves, etc., are mounted on the pan exteriorly of the range and then inserted in the compartment and secured firmly in place, thereby avoiding the inconvenience of manipulating the necessary tools,

wrenches, and the. like, in the relatively small space within the burner chamber. This unit assembly also reduces the cost and is a convenience in removing the burners from the range for servicing or repairs. .The oven burner is then inserted in the chamber therefor and the fittings |55 and |5| are connected by the pipe |56. The pipe |56 has along thread on one end and a short thread on the other so that when the long thread is screwed up tight in the tting |55, the-opposite end is in position to'enter the threaded opening of the tting |5|. The pipe is then rotated so as to unscrew the end thereof from the fitting |55 and screw the opposite end in the fitting |5|, there being suillcient threads to retain threaded connection with the fitting |55 when the pipe is tightened in the tting |5|.

In operating the burner unit constructed as described, the tank is filled with liquid fuel and moved into the tank compartment so that the tip of the generator passes through the opening of the mixing chamber. With the generator valve closed, a pump in the tank is operated to generate pressure on the fuel in the tank and force the fuel through the generator tube when If the rear auxiliary burner is to be lit, the

valve |20 is opened to permit flow of vapor through the duct ||2 to that burner. Likewise vapor may be delivered to the front auxiliary burner by opening the valve |23 to admit vapor from the passage |03 into the passage |04 of the arm H0. When the geenrator has heated sufli- Y ciently to eifect vaporization of the fuel, the

atomizer 92 is turned to its original position.

- The oven burner is preferably lighted after the generator burner has been in operation. This is accomplished by opening the valve 86 and applying a match to the oven burner.

From the foregoing it is obvious that I 'have provided a novel burner arrangement and construction which facilitates assembly and provides full cooking capacity of a three burner top in-.

cluding ample baking capacity of the oven.-

It is also obvious that the unit assembly provides for simple machining of the parts and they may be relatively inexpensively manufactured. The units are also arranged so that the valve operating controls are located symmetrically which greatly enhances the pleasing appearance of the range front.

What I claim and desire to secure by Letters Patent is: "i

1.` A burner unit including an integral casting having parallel arms in the same horizontal plane when in operative condition and interconnected by a. substantially U-shaped bend, one of said arms forming a mixing chamber therefor, the other arm forming a. flow duct, a generator burner supported by the last named arm, a vaporizer heated by said burner, a valve controlling flow of liquid fuel to the vaporizer and having an operating stem, a master burner carried by the last named arm, and a valve connected with said last named arm and having an operating stem located in parallel alignment with the iirst named valve.

2. A burner unit including, an integral casting .having parallel arms in the same horizontal plane when in operative position and interconnected by a substantially U-shaped bend, one of said arms forming a mixing chamber therefor, the other arm forming a flow duct, a generator burner supported by the last named arm, a vaporizer heated by said burner, a valve controlling flow of liquid fuel to the vaporizer and having anoperating stem, a master burner carried by the last named arm, a valve connected with said last named arm and having an operating stem located in parallel relation with the first named valve stem, a duct-like arm connected with the U-shaped bend on the side of the mixing chamber opposite the iiow duct and having a valve chamber, said chamber being provided with a fuel port for connection to an oven burner, a valve in said chamber, and an operating stem for said valve located in parallel relation with said operating stem controlling the master burner.

said horizontal plane, burner bowls connected with ends of said arms and having vertical axes located in a vertical plane substantially midway between the valve chambers, said hollow body of the last-named unit having a port connecting one of the valve chambers thereof with its related duct-like arm and having a port connecting the other valve chamber with the iiow passageway, a duct connecting the ilow duct of the first-named unit with said valve chamber to which the flow passageway directly connects, valves in said valve chambers and controlling said ports. and stems for said valves all extending in parallel'relation with said vertical plane and located in said hori- L ing interconnected by an offset passageway di- 3. A burner unit including, a` hollow body and spaced valve chambers located in substantially lateral augment with respect to each other and having an offset passageway directly connected with one of the valve chambers and with the other valve chamber through a port in said body, ductlike arms connected with the respective valve chambers, burners connected with the free ends oi' said duct-like arms and located with their axes in a vertical plane substantially midway between the valve chambers, said hollow body having a port connecting the valve chamber to which the offset passageway is directly connected with its related duct-like arm, valves controlling said ports. and stems for said valves extending in parallel relation on the respective sides ofthe vertical plane` extending through the axes of said burners.

4. In a burner assembly, a pair of burner units, one of said units having laterally spaced parallel duct-like arms connected by a substantially U- shaped bend and with the axes thereof located in a common horizontal plane, one of said arms forming a mixing chamber and the other a now duct provided with a valve chamber having a valve port, the other unit including a hollow body having valve chambers and having a flow passageway between said chambers, duct-like arms connected with the respective valve chambers of said last-named unit with the axes of `said arms in rectly connected with one of the valve chambers and with the other valve chamber through the valve port thereof, duct-llke arms connected with the respective valve chambers of said last-named unit with the axes of said arms in said horizontal plane of the arms of the first-named unit, a duct connecting the now duct of the first-named unit with said valve chamber of the last-named unit to which the oiiset passageway directly connects, valves in said valve chambers and controlling said ports, and stems for said valves all located in said horizontal plane.

6. In a burner assembly, a pair of burner units. one of said units having laterally spaced parallel duct-like arms connected by a substantially U- shaped bend and with the axes thereof located in a common horizontal plane, one of said arms f forming a mixing chamber and the other a flow duct provided with a valve chamber having a port. a burner connected with the valve chamber, the other unit having a hollow body provided with valve chambers located in substantially lateral alignment with respect to each other and interconnected byan oiset passageway directly connected with one of the valve chambers and with the other valve chamber through a port in said body, duct-like arms connected with the respective valve chambers of said last-named unit with the axes of said arms in said horizontal plane oi.' the arms of the first-named unit, burners supported on terminal ends of said last-named arms with the centers thereof located in a vertical plane substantially midway between the valve chambers, said hollow body of the last-named unit having a port connecting the valve chamber to which said oil'set passageway is directly connected with its related duct-like arm, a duct connecting the flow duct of the first-named unit with said valve chamber of the last-named unit to which the offset passageway directly connects, valves in said valve chambers and controlling said ports, and stems for said valves all extending in parallel relation with said vertical plane and located in said horizontal plane.

. `*HYD W. TULLIS.