US2092799A - Stove - Google Patents

Description

` H. CORY Septjm, 1937.

STOVE Filed. Nv. 29, 1935 Patented Sept. 14, 1937 UNrrED STATES PATENT ori-ica 2 Claims.

This invention relates to stoves, and particularly such as are adapted for use with coffee makers of various kinds. The present stove is particularly advantageous in restaurants or 5 other public places where large quantities of coiee are prepared and served. l

The improvements with which the present invention is concerned relate to the combination of a simple and inexpensive housing with supporte l ing legs that may be fitted in place and furnish adequate support therefor, no matter how heavy the load; with reinforcements which also provide means for` securing the supporting legs in place; with further supporting structure within the housing for sustaining the burners that are arranged therewithin; with the utilization of an offset bar adjacent the front wall of the housing, furnishing a depending skirt which serves to carry and conceal a fuel distributing pipe Within the housing adjacent its lower edge; and generally withthe combination and arrangement of the several elements and units which enter into and form the structure hereinafter described. All such improvements contribute to the strength of the stove structure; to the simplicity of the parts which are required therefor, with a consequent reduction in the expense thereof; to the ease and facility with which these parts may be assembled; and to the general accessibility of the various elements and units in the structure, permitting adjustments, repairs, or vreplacements as required.

An exemplii'lcation of this invention is set forth in the accompanying drawing Whereinl Figure 1 is a view in plan of the stove structure complete, a portion of the top burner plate being broken away to exhibit parts interiorly of the housing; ,i Fig. 2 is an enlarged transverse section taken on line 2-2 of Fig. 1; and

Fig. 3 is a vertical section taken on line 3 3 of Fig. 1.

The present stove includes in its structure a 45 housing H in the form of an enclosure that may be provided by a band of sheet metal or the like which is extended around with its opposite ends joined at the rear to a connecting plate 5.- The corners of the housing are curved as at 6 through a relatively wide arc,v instead of being sharp. Across each of the opposite ends of the housing I extend a shelf having a downturned flange 8 whose lower edge may be co-terminus with the corresponding edge of the housing. For a dis- 55 tance of perhaps 90' degrees or more adjacent each corner of the housing, this ange is del properties.

sirably'cut away to avoid difficulties in bending. As by means of spot-weld connections between the iianges and the proximate housing walls each shelf is secured mmovably in place.

To support the stove housing in an elevated position, I utilize certain leg blocks L formed desirably from some material which has insulating As shown, each block may be of arcuate shape, so as to t into a rounded corner of the housing. The cross sectional form of 10 each block (seel Fig. 3) is such as to provide a face lo which is inset adjacent a horizontal shoulder i i. The vertical dimension of this inset face corresponds with that of the shelf ang'es 3 whereby the block shoulder and the top surface l5 of the block may furnish supporting engagement to the lower` edge of the housing and to the shelf respectively. In addition, each inset block face which is arcuate from end to end in conformity with the corner curvature of the housing is in continuous engagement therewith throughout substantially the entire distance of each flange interruption so as to reinforce the lower` edge portion of the'housing. To secure each leg block in its supporting position I may utilize a pair of screws i2 which are entered through holes in the shelf to present their Shanks in threaded engagement with the body of the leg block.

Along the front wall of the housing and attached to the inner surface thereof at a point near its lower edge, is an offset bar having an upwardly extending flange i5, a horizontal ledge i6, and a depending skirt il which lies inwardly of the front housing'wall. This bar extends for the major portion of the distance centrally between the two leg blocks at the front of the hous ing. The ange i5 may be secured to the nousing as by bolt connections i8 or otherwise. Carried bythe offset bar, and secured to the ledge thereof as by bolts 2li, are one or Vmore horizontally extending clips 2i each bent to form a supporting bracket for a fuel pipe 22. As shown in Fig. 1, this pipe comprises two sections joined by a T-fitting 23 to which'is joined another hori- 4.. zontal pipe 'Pd extending through the rear wail of the housing for connection with a source of fuel supply. A rear support for the pipe 2d is aiorded -by an apertured plate 25 through which the pipe is extended, this plate being secured to the rear wall of the housing from which it depends as by a spot weld connection.

Upon the two shelves is mounted a longitudinally extending elevated bracket bar 3u. As

shown, this bar lies in the rearward portion of the housing, being formed.- adjacent each end tat'able plug 38. Extending axially from one end of the plug is a stem 39 which passes through an aperture 40 in the front wall of the housing. An operating handle 4i is tted to the stem end whereby to rotate the plug through manipulations from the housing exterior.

Connected with the valve body is a nutl surrounding the plug stem and serving to conllne therearound a coiled spring' G8 which bears against a stop plate 41. The plug and stop lplate l l35. On the plug side opposite the nipple is an extension of the valve body containing asecond ypassageway` 5I terminating within an adjustable hood l2 having an oriilce 53 adjacente needle 54. The valve body is also provided with a. second nipple having a passageway 5B which ccmmunicates with a short passageway B1 extending axially within the plug 3B to join an angular passageway 58 extending transversely therethrough. This transverse passageway is adapted to register fully with either passageway 5t or BI, one at a time, or partly with both simultaneously.

Fitted to the nipple 55 is a coupling 6I to which is joined a pipe section Si leading to a valve body 62 having an'yadjustable needle valve 63 for oontrolling the passage of gaseous fuel into a chamber 64 to which'airjs admitted through a port Si to support combustion at the discharge end of a pipe BS forming the secondary unit of a duplex burner.

'I'he primary burner which is concentric with the secondary burner comprises ahollow body having at oneend an annular chamberv 81 between inner and outer walls 8B and 6l respective-` ly. A. series of small burner openings 'Il .are formed through the top wall of the annulus to assure in operation a circular flame. The burner body extends horizontally from the anniilusl to provide a lateral passageway 1l having atits end` an opening 12 adapted to be iltted over the hood i2. 'Adjacent its connection with the hood ism `side openingadapted to be closed to anyex oted atie., dessous fuel sdmiued'tuemugn Y oriilce l into lthe passageway 12 is taken into` the annular chamber 61 for discharge through the openings 1i. Airalso enters through theopem' ing 1l to mix with the gaseous fuel, thereby to 'the burneropeninm.' The body ci the primary burner which may be loosely rested at one end upon the hood i2 is supported at its other Vend in an opening 11 which is provided in the bracket bar, whereby the burner plate is held in ar fixed operative position. f l

The burner structure together vwith the valve linechanism, just described, is duplicated at each end of the stove. One such' burner is connected with each of the L-ilttings at opposite ends of the pipe 22. Obviously other similar units may be added as required for increase in the stove capacity. but for convenience and simplicity in description and illustration, I have selected a two-burner stove by way of example.

Connected with the T-fitting 23 is an L-tting to which is connected a coupling 8| joined to a pipe section 82- which extends rearwardly and then upwardly. terminating at a point about mid# way of the two duplex burners and in line therebetween. At the end of this Vpipe is a small oriilce B3 from which may issue -a low flame serving as a pilot light. The body oi. each primary burner is .provided with a laterally extending hood 84 wherein may be received one end oi a short pipe section 85 which extends laterally toward :the pilot dame, terminating just short-thercof. This pipe section may be secured in place asiby means of a screw 86 which passes through the pipe llor engagement-with the wall of the hood proximate thereto. v'l'.'he screw may also secure in piace a bracket which extends downwardly to provide a foot 81 for resting upon thebracket bar Iii, thereby aording a second point of support ther-eu n for each primary burner body. Through outer wall 89 of each burner body is a. small port or openingv I8 through which air or gas may pass. With the burner in operation, airenters through this opening tolsupport combustion, whereas'with no combustion a small quantity 'oi gas may 'escape therethrough into the pipe section l5. 'l'he hood 8E is provided with a slot 89 facing upwardly close to one side of the circular row of openings 10 in the burner body.

In operation, thel control handle 4i 'may be manipulated to admit gas through either the pipe 8i to the secondary burner 88 or throughthe passage 5I into the primary burner. Either one.

of these burners may thereby be operated, according as the valve is manipulated. A pilot lightis A lthe secondary-burner may be opened wiuitnev;r

n consequence v`that'tl'ie latter is ignited from the' *tisanes of the former, and viceversa. This tol-f :flows vfrom-the fact that the openings in the valve lplug 1l are so arranged that there need not -be a complete shutoil'o: gas to the one burner be-4 foreopening up communication to the other.

Mounted to rest upon the top edge ofthe stove housing is a burner plate 0B formed desirabiy Vwith a. depending ilange'll cigse'to its peripheral edge,.-this ilange fitting down 4and lying within v the housing soI- as to position the plate correctly thereupon.

" ings l2- fortheI escape oi products of corribustion,`

and directly over each duplex burnerA is-a seat ll preferably depressekbelow the plane of the Within the plate are suitablel open-1 burner plate, the seat having a large central opening 94 beyond which are radial ribs 95 on which a cooking utensil may be rested. In this way the'heat from the burner therebelow is trans- 5 mitted directly to the utensil which is thereby supported by the seat in the most effective position.

The stove of this invention is particularly suited for use with gas as fuel, although liquid l fuel which is furnished in the proper state or condition may possibly be used as well. It provides in its structure a simple yet strong form of housing for supporting thereabove the burner plate on which one or more cooking utensils are to be l rested. In addition it provides interiorly of its structure a mounting for the pipe yconnections and valve mechanisms,` also the several burners that are to be joined thereto, all arranged and combined to operate in the manner hereinbefore set forth. A full flame may issue from each of the primary'burners or, if desired, this ame may be shut off and a low ame may-be issued from the secondary bur-ners, according to whether or not a cooking temperature is to be maintained or only a serving temperature. -A stove having these characteristics is particularly suitable for use in restaurants and other public places in the making and serving of coiee. It is light, easily set up and cared for, and is also ornamental and lower edge of the band and shaped to engage and laterally brace the end walls and corner portions formed by said band, corner supporting blocks connected to the underside of the shelf-like plates and embracing the lower band edge portions at the corners. and a rigidy burner plate havingy a depending ilange shaped to closely fit within and rest upon the upper edge of said band enclosure, whereby said interiltting parts cooperate to brace and strengthen the relative light supporting and enclosing housing and produce a rigid structure.

2. A stove having a housing composed of a rel-l atively thin sheet metal band of a width substan#A tially equal to the height of the stove, said band being extended around and joined at its ends to form a continuous band enclosure of generally rectangular conguration, a pair of spaced horizontal shelf-like bottom plates extended across the enclosure at elevations slightly above thelower edge of the band and shaped to engage and laterally brace the end walls and corner portions formed by said band, corner supporting blocks connected to the underside of the shelf-like plates and embracing the lower band edge portions at the corners, a rigid burner plate having a depending ange shaped to closely .t within and rest upon the upper edge of said band enclosure, whereby said intertting parts cooperate to brace and strengthen the relative light supporting and enclosing housing and produce a rigid structure, a burner supporting bracket resting upon and retaining said shelI-like plates in laterally spaced relationship against the inner end walls of said band enclosure,` and a burner manifold assembly supported in part byI a wall ofsaid band enclosure and said burner supporting bracket in the space I

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