US2570771A - Baffle structure for combustion tube type burners - Google Patents

Description

C- 9, 1951 J. J. coNRoN 2,570,771

BAFFLE STRUCTURE FOR COMBUSTION TUBE- TYPE BURNERS Filed Feb. 24, 1949 INVENTOR.

JOHN ..CONRON7 kfw/WM .1 'I'TOR XE Y v This invention relates Patented Oct. 9, 1951 OFFICE BAFFLE STRUCTURE FOR, COMBUSTION TUBETYPE BURNERS John I. Conron, Middleboro, Mass.

Application February 24, 1949, Serial No. '78,110

particularly to baiiles for the tops Vof such burners and it has for its primary object to improvethe construction and operation of burners of the class indicated.

' A further object of the invention is to provide a baflie attachment unit for application to the top of an existing oil-burner which will enhance the efficiency of the latter; which will be of simple, eicient and inexpensive construction, and which can be applied to anrgexisting oil-burner, preferably withoutrequiring modification of the construction of the latter.

To these ends I have provided certain improvements in oil-burners and attachments therefor which, in thel preferred embodiment of the invention, may be constructed and operate as set forth in the following description, the novel features of the invention being particularly pointed out and dened in the claims description. v

'In the accompanying drawings:

Figure 1 is a top plan View of a baie attachment constructed in accordance with this invention.

Figure 2 is a section on line 2-.-2 of Fig. 1 showing the attachment applied to the top of an oilburner.

Figure 3 is a developed sectional detail on line 3-3 of Fig. 1. A

In the accompanying drawings I have embodied my invention in a well known type of oil-burner `for use within the firebox of a kitchen range or the like, said oil-burner comprising a cast iron base member (notJ shown) that is supported by the bottom of the rebox and recessed upon its top side to telescopically receive within it the lower ends of two pairs of upstanding concentrically disposed cylinders I0, I0, and II, II, of perforated sheet metal. Seated within the recessed top of the base member, as usual, are two annular wicks (not shown) whereof one is disposed between the lower ends of the two cylinders I0, I0, while the other wick is disposed between the lower ends of the two cylinders II, II, all of said wicks being saturated with fuel oil that is automatically fed into the recessed top of the base member, as usual, as the supply therein is consumed by the burner.

As is also usualin this type of burner the base member is provided with air inlet apertures (not shown) through which air is supplied to the lower end of the chamber within the innermost cylinder I I and also to the annular space between the innermost cylinder I and the outermost cylinder II.

to range oil-burners and Vat the close of the 1 Claim. (Cl. 158-89) Between the two cylinders I0, I0, andfextending from the top of the wick between the bottoms thereof to lthe tops of the two cylinders is the usual annular combustion chamber I2 to which air is supplied through the perforations of said cylinders. Likewise, between the two cylinders II, II, and extending from the top of the wick that is between the lower ends thereof to the tops of the cylinders, is the usual annular combustion chamber I3 to which air is supplied through the perforations of said cylinders.

The burner is started in operation by means of a lighted taper which is inserted into the upper ends of the combustion chambers I2 and I3 and applied to the two wicks referred to above. This ignites the oil ofthe wicks and shortly all parts of the burner, including the wicks, become heated with the result that vaporized oil is liberated from the wicks and ascends the combustion chambers where air isv intermixed therewith to occasion and, support combustion, ,the ames thereof 'and the heated products of combustion discharging upwardly from the upper ends ofthe combustion chambers.

In accordance with my invention I provide a sheet metal cap plate I4 that is in the form of a diskof substantially less diameter than that of the interior of outermost cylinder I0 and of slightly greater diameter than that of the exterior of the innermost cylinder I0. This provides an annular outlet I5 for the flames and heated products of combustion issuing from combustion chamber I2. This plate I4 is seated upon the tops of the three innermost cylinders as shown in Fig. 2 and is made with arcuate apertures I6 which register with the upper end of the combustion chamber I3 and to serve as outlets for the iames and products of combustion issuing from within said chamber and also to provide entrances for the lighted taper employed in lighting the innermost wick when starting the operation of the burner.

The middle portion of the plate I4 is imperforate and embossed or molded to provide the bottom side thereof with a circular boss I8 that is slightly smaller in diameter than the inside diameter of the innermost cylinder I I into which it projects to hold the plate' I4 with its center approximately at the axis of the burner, and also to provide the top side of plate I4 with a Circular recess or pocket I9 within which are seated the lower ends of four legs 20 that are parts of a sheet metal spider that is fastened at its middle by a rivet 2| to the center of a circular baie plate 22.

The imperforate middle portion of the cap plate I4 serves as a closure for the upper end of the interior of the innermost cylinder I I by which latter air is supplied to the perforations of the same, while the outer marginal portion of the cap plate I4 closes the upper end of the air supplying space between the innermost cylinder Ill and the outermost cylinder I I,

The baille plate 22 is made as a disk-like metallic structure having an imperforate circular middle portion 23 to which said legs 2) are fastened, said middle portion being surrounded by a circular series of angularly spaced-apart radial openings 24 which are disposed directly above the outlets I and I6 so that the ilames and productsA of combustion rising from the two combustion charnbers pass upwardly through the same. f

At one side of each aperture 2d the baille plate 22 is provided with an upwardly and obliduely disposed deilector vane 25 by which the products vof combustion and llames that pass upwardly through the aperture are deilected laterally thereby imparting a Cyclonic rnotion to the gas and names after the latter pass through the baille plate. This agitation not only mixes additional oxygen-laden air with the gases and naines thereby increasing the combustibility of the unburnt gases but also delays the escape thereof into the oil-take ilue connected with the ilrebox of the range within Which the burner is mounted. This increases the efficiency of the burner to a substantial extent, economizes in the use of fuel oil, and correspondingly reduces the cost of operating the burner.

As herein shown the baille plate is preferably made from sheet metal and all of the vanes 25 with the exception 'of at least one that is shown at 25 in Fig. 1, may be punched upwardly from the material of the baille by means of a die which simultaneously forms all of the apertures 24, so that each Vane 25 is an integral extension of said body portion which extends obliquely upwardly from said body portion and tangentially relatively to the center thereof, with all of the vanes 25 facing circumferentially, so to speak, in one direction in order to obtain the cyclorn'c effect referred to above. Y

The single vane 25 is originally produced as a separate unit at one side of which are provided two integral hinge tangs 26, 26, that loosely occupy holes 2l, 21, formed in the body portion of the baille 22. At the opposite side of the vane 25 is provided an integral leg tang 28 Whose extremity rests upon the top of the baille and supports said vane 25 in its oblique position. When starting the operation of the burner vane 25 is swung upwardly on the hinge tangs 26 into an open position thereby to permit the lighted taper referred to above to be passed downwardly through the passageways I5 and I6 to light the wicks after which the vane is returned to its normal oblique position with tang 28 resting upon the top of the baille.

What I claim is:

In a device of the class described, the combination of a cap plate to seat upon the tops of the cylinders of a range oil burner and made 'with a circular series of apertures adapted to be disposed at the top ofV one of the combustion chambers of the burner to serve as outlets for said chamber, the middle portion of said cap plate being irnperforate and formed upon its top side with a circular recess; a baille plate abovesaid cap plate provided with depending legs resting `within said recess and supporting said baille plate above and spaced away from said cap plate, said baille plate having a circular imperforate middle portion surr rounded by a circular series of angularly -spaced apart radial openings adapted to occupy positions directly above the cylinders of the burner and each of which openings is provided with an obliquely disposed deector vane by which the products of combustion issuing upwardly through its opening are deilected laterally, one Yof said vanes being hingedly connected with said baille plate so that it can be adjusted into an out-ofthe-way position permitting a lighted taper to be passed through its opening to ignite a wick of the burner; all of said vanes except said hinged vane being integral stamped out portions of said baille plate, and all of said openings being surrounded by an mperforate continuous peripheral portion of said baille plate.

JOHN J. CONRON.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Date

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