US2661418A - Burner and chimney for incandescent mantle lamp - Google Patents

Description

Dec. 1, 1953 w. B. ENGH BURNER AND CHIMNEY FOR INCANDESCENT MANTLE LAMP 3 Sheets-Sheet 1 Filed May 13, 1950 WA A. v-zi g fi'fii ATTORNEYS.

Deer. l, 1953 w. B. ENGH ZfiMAM BURNER AND CHIMNEY FOR INCANDESCENT MANTLE LAMP Filed May 15, 1950 3 Sheets-Sheet 2 INVENTOR. W4 L722 5. ENGI-L Dec. 1, 1953 w. B. ENGH BURNER AND CHIMNEY FOR INCANDESCENT MANTLE LAMP 3 Sheets-Sheet 3 Filed May 13, 1950 NVENTOR. WA LTE/E. ENGH.

Patented Dec. 1, 1953 BURNER AND CHIMNEY FOR INCAN- DESCENT MANTLE LAMP Walter B. Engh, Alexandria, Ind., assignor to Aladdin lndustriealn corporated, Chicago, 111., a corporation of Illinois Application May 13, 1950, Serial No. 161,812

2 Claims. (Cl. 240-99) The invention pertains to incandescent mantle lamp burners for illuminating purposes, and

comprises an improvement in chimney construction and mode of operation, for such burners.

It is an object of the invention to produce a chimney and cooperating parts, that will direct outer mantle air upwardly and against the mantleof the burner, to avoid carbon spots on the mantle; it is a further object of the invention to construct the lower portion of a chimney with a conical 'inner surface converging upwardly, which in cooperation with the gallery of the burner, will direct a conical and tubular column of outer mantle air upwardly and against the mantle of the burner, to avoid carbon spots on the mantle; it is a further object of the inven tion to construct the outer surface of the gallery of the burner in conical form and parallel with the said conical surface of the chimney; it is a further object of the invention to limit the space between said chimney and gallery surfaces to a small amount of separation, and to admit air to the lower end of said space from outside the burner; it is a further object of the invention to construct the chimney with a plane lower end surface perpendicular to the axis of the chimney .and tosupport said chimney on a horizontal surface of the gallery having spaced first humps holding said lower end an evenly spaced distance above said horizontal surface; and it is a further object .of-the invention to provide the lower end portion of the chimney with spaced second humps .extending laterally from said end portion for ,holding and separable engagement with spaced lugs-secured to said gallery, and to construct said second humps to center the said conical surfaces of the chimney and gallery relatively to each other by engagement of saidsecond humps with a vertical wall secured to said gallery.

The invention will be best understood by reference to th accompanying drawings illustrating a preferred embodiment thereof, in which Fig. 1 shows to an enlarged scale a burner of which the invention is a part, in central, vertical sectional view,

Fig. 2 shows to a further enlarged scale and in a view similar to Fig. 1, the parts of the burner directly involved in controlling the flow through the burner of the several air currents requisite for the effective operation of the burner,

Fig. 3 is in part a plan View to an enlarged scale of part of the chimney seat carried by the gallery, this view also being a horizontal, sectional view of the chimney and gallery taken along the line 3.3 in Fig. 5,

line 44 in Fig. 3,

Fig. 5 is a vertical, sectional, view of part of the structure shown in Fig. 3, taken along the line 5-5 inFig. 3,

Fig. 6 is a vertical, sectional, view of part of the structure shown in Fig. 3, taken along the line 6-5 in Fig. 3, and

Fig. 7 is a vertical, sectional, view of the structure shown in Fig. 6 taken along the line 11 in Fig. 6.

Similar numerals refer to similar parts throughout the several views.

As shown in Fig. 1, the burner illustrating the operation of the invention, comprises a cylindrical basket H} of sheet metal, which is provided with numerous perforations to permit the free flow of the air into the basket, required for the operation of the burner. The lower portion of the basket, not shown, is provided in any known manner, with means for mounting the burner on a fuel font or reservoir. While the invention is applicable to different types of burners, the burner illustrated is of the side draft type having an inner wick tube ll rigidly supported by the basket coaxially therewith, and supplied with inner air from said basket. The inner wick tube ll supports a wick [2 which is tubular at its upper portion, and movable vertically on said tube by any known wick operating mechanism, not shown. An outer wick tube is shown, consisting of upper and lower portions l3 and I4 respectively, the upper portion l3 at its upper end portion being closely'adjacent the outer surface of the wick, and a short distance below its upper eridfbeing of substantially enlarged diameter 'providing'a space between the tube and the wick in which the wick operating mechanism may be located. The lower end of the tube portion I3 is provided with'a seat resting on the upper end of the tube portion l4, and aligning the two tube portions so that they are coaxial with each other basket IE! to efiect the coaxial relationships expressed;

' The basket in removably supports at its upper end, a gallery I5 comprising a support for a chimney l6 and also a support for a mantle mounting l7, la the latter being removable from the gallery to facilitate mantle renewal.

The outer wall of the gallery is conical in form, converging upwardly, and from its inner mid-portion, a bafile I9 extends in the form of a flat cone converging upwardly from the gallery outer wall towards the outer wick tube portion [3, and then it extends cylindrically and upwardly with a small radial spacing from the upper end of the tube portion [3 and terminates a short distance above the upper end of the said tube portion and a substantial distance below the member 18 of the mantle mounting, said baffle at its upper end being provided with a horizontal flange of small radial extent projecting towards the axis of the burner.

The wick tubes II and I3 terminate in substantially the same horizontal plane, and the tube 13 carries at its upper end a flame flange 20 slightly spaced from the vertical portion of the baflle IS.

The member [8 of the mantle mounting constitutes the burner cone of the burner, and it has a vertical wall spaced from the member I! to receive in a groove thus formed, the lower edge of the mantle 2| and protect and center the samerelatively to the flame produced above the wick l2.

The inner wick tube 1 l is provided at its upper end, with a cylindrical flame spreader 22 substantially closed at its upper endand having its vertical wall above the tube I I, perforated to direct inner air to and into the flame of the burner.

The vertical, cylindrical portion of the member 18 extends substantially below its seat on the upper end of the gallery l5, and the member IT is cylindrical above said seat and provided at said seat with a horizontal flange resting thereon and below said seat said member is cylindrical and closely fits the cylindrical lower portion of the member l8,v where said members are secured together to form an integral mounting structure for the mantle.

The lower portion of the chimney l6 is conical in form, and is coaxial and of like pitch with and slightly spaced from the conical gallery [5 to provide a restricted passageway 32 for outer mantle air to flow upwardly and through perforations 3-! in the upper cylindrical portion of the member H, to the mantle.

The parts described, unless otherwise stated, are of circular cross-section horizontally and have a coaxial relation to each. other.

Where certain of the parts are above described as readily removable from adjacent parts, said parts are constructed in each case to establish a coaxial relation of the; parts, and devices of known kind are preferably employed for removably securing the parts together for use, for ex.- ample, any desiredforms of, bayonet connections.

As shown in Fig. l, the; mounting." member l1 supports a harp 23 which in turn supports: the mantle 2| around the flame of the burner.

In view of the flow of air currents through the burner being an important consideration in the present case, reference is made to Fig; 2 illustrating said flow, from which the present invention may be more clearly understood. -As shown in Fig. 2 inner air A flows upwardly in the inner wick tube H to and through the perforations in the flame spreader 22 and upwardly and outwardly therefrom to the inner portion of the flame 24 to provide the requisite inner air for the production of the blue fl'ame desired to incandesce the mantle 21. It will be noted that the flame spreader 22 is imperforate at its upper end, excepting for a small central aperture 25.

This permits a restricted amount of inner air A1 to flow into the flame which is hollow and closed at its upper end, to expand the upper portion of the flame and give it more nearly the form of the mantle, thereby more effectively in candescing the upper portion of the mantle.

Outer air B flows upwardly from the basket l0 around the outer wick tube portion I3, between said tube portion and the lower portion of the gallery l5, and through an annular row of large perforations 19a in the baffle 19, and through the annular space between the lower cylindrical portion of the member [8 and the upper cylindrical portion of the baffle l9, into the space immediately below the horizontal portion of said member l8; said horizontal portion stops the vertical flow of the tubular column of outer air B, and requires said column to make a substantially degree turn under the horizontal portion of the member I8, so that said column B will be discharged from under the inner edge of said horizontal portion, in a horizontal direction against and into the outer surface of the flame and of the column of vaporized gas ascending from the wick I2; this action is insured by the projection of the lower edge of the member l8, substantially below the upper end of the bafile l9, which prevents column B from taking an oblique course towards the flame and vapor col- Lunn, which in turn would materially reduce the penetration of the air of column B into said flame and vapor column, with corresponding reduction in the burning efficiency of the flame. A small part B1 of the air of column B is bypassed therefrom through small apertures l9b in the upper end of the baffle 19, which air B1 flows around the inner edge of the short flange on the upper end of the baffle, through a clearance space between said flange. and the wick l2, to join the main column B abovev the wick; this prevents undue heating of the upper portion of' the bafile, and tends to raise the flame from the upper end of the wick. At the same time an even smaller amount of air B2 is bypassed from the column B, inside of the upper portion of the baffle and between it and the edge of the flame flange 20', above which it joins bypassed air B1; this prevents the undue communication of heat from the flame flange to the battle. The relation of the lower and inner surfaces of the member I8 to the surfaces of the upper end portion of the baflle I9 and of its upper end flange, meters the outer air supplied to the flame and insures that the amount of outer air so supplied shall be optimum for the intended purposes.

The flame Z4 delivers a large quantity of gases of combustion C that are very hot, which gases are in large part projected against the mantle 2| and into and through its. meshes, to incandesce said mantle.

In the above operation, the effectiveness of incandescing the mantle, is determined not only by the accurate proportioning of the air tothe liquid fuel burned, but frequently by the purity of said fuel. In the practical operation of burners in the manner and for the purpose described, it frequently has happened that carbon spots have formed on the mantles and particularly on their lower portions, that have materially reduced the illuminating efliciency of the mantles. To remedy this condition, additional air flow is produced in the. burner, as shown in Fig. 2. The chimney [6, which is preferably of glass, has a lower end that is. a plane surface, and rests on equally spaced humps 25 extending upwardly from the seating portion of the gallery I5 at its lower end; as a result, a small annular air passageway 33 is produced between the lower end of the chimney and the gallery excepting at said humps 26. The lower end of the gallery is surrounded by andrigidly secured to an annular retaining band 27, which band is provided with a row of closely spaced perforations 28 in line with the passageway 33. The lower end of the chimney is provided with equally spaced humps 29 extending laterally and outwards from it for engagement with corresponding holding lugs 30 extending inwardly from the upper edge of the band 27, when the chimney is in place on the humps 28. The humps 29 extend under the lugs 39 to a position closely adjacent the inner surface. of the band 27, to center the chimney relatively to the gallery I 5, which maintains the passageway 32 between the conical portions of the chimney and gallery of substantially uniform radial extent throughout. Thus air from outside of the burner is drawnin a column D through'the perforations 28 and under-the chimney and then upwardly'through the passageway 32, by the heated air in the chimney, which column D is projected with substantialvelocity through the apertures 3! in the mounting member I! and then upwards along and entirely around the outer surface of the mantle.

The air is highly heated in its upward passage between the chimney and the gallery, and un burned carbon particles that may have lodged in the mantle meshes in unburned condition, are very hot from the action of the flame,-and as result, the outer mantle air burns the carbon spots and clears the mantle of them, thereby improving the illuminating power of the mantle.

The holes I91) extending around the upper portion of the baflle l9 prevent accumulation of a tarry deposit on the upper end of the flame flange 20. This deposit, if permitted to form and accumulate, eventually obstructs the small annular space between flange 20 and the baffle is to prevent flow of the cooling and air directing auxiliary flow of air (B1) through that space. The air flow through the holes. [9b Wipes oi the vaporized fuel that otherwise stagnates above the flame flange 20 and prevents its lodging and condensing on that flange. This action of the air flow through holes |9b is supplemented and reinforced by the air flow B1 passing through the small annular space between flange 20 and the baffle IS.

The drawings above described show two in ventions, first, the mantle mounting and its cooperating parts, and second, the chimney and its cooperating parts. not claimed herein, as it constitutes the subject matter of a separate application, serial Number 161,813 filed May 13, 1950, now Patent No. 2,603,959, the claimed subject matter of the present application being said second invention.

Fig. 3 shows to an enlarged scale and partly in plan view, a portion of the chimney seat carried by the gallery I5, and also the conical passageway 32 of small radial extent, between the lower portions of the gallery and chimney l6, this view being taken along the line 3-3 in Fig. 5.

Figs. 4 and 7 show the relation between each of the chimney humps 29 and the corresponding holding lug 30, and also the relation between each of said humps 29 and the band 21, when the chimney is held in place on the gallery by the lugs 30. The result is to hold the chimney The said first invention is firmly against the supporting humps 25, and establishes the air admission passageway 33 between the lower end of the chimney and the adjacent surface of the gallery I", which. is of uniform vertical extent throughout, and which is in alignment horizontally with the apertures 28 in the band 21; and it also, by the relation of the humps 29 to the band 21, centers the chimney l6 relatively to the conical surface of the gallery l5, and establishes a uniform lateral dimension for the conical air passageway 32. As a result, a conical, tubular column of air is projected upwardly by the passageway 32 as above described in connection with Fig. 2, which is of uniform thickness angularly of the mantle, and uniformly avoids carbon spots at all points around the mantle, thereby tending to maintain uniform illumination around the mantle.

Fig. 5 shows the relation of the lower end of the chimney IE to the adjacent surface of the gallery I5 between any adjacent ones of the lugs 30, and clearly shows the unrestricted commu nication of the inner portion of the passageway 33 with the lower end of the passageway 32. thereby providing for the flow of air through said passageways and thus to the mantle, which is restricted only by the size of said passageways, which are so made as to'deliver sufiicient air to the mantle to avoid the formation of carbon spots thereon, but insuflicient to materially decrease the illuminating efficiency of the mantle.

Fig. 6 shows the relation of one of the chimney humps 29 to a corresponding supporting hump 26, when the chimney is held in place on the gallery. From Figs. 3, 6 and '7, it will be noted that each supporting hump 26 is below and in line with a corresponding lug 30, and that when the chimney is held in place on the gallery, a holding hump 29 of the chimney rests on one of the supporting humps 26 and is held in place by the lug 30 immediately above said supporting hump 26. This limits the holding strains on the chimney to the holding humps 29, which are thickened parts of the lower end portion of the chimney and are better adapted to withstand said holding strains than are other parts of the lower end portion of the chimney.

As shown by the dotted line 29a, Figure 2, the

upper faces of the humps 29 of the chimney l6 slope peripherally of the chimney. Each face slopes in like sense so that as the chimney is rotated relative to the gallery l5 (and the lugs 30) the portion of the humps engaged by the lugs rises relative to the base of the chimney and the chimney is brought into progressively snugger engagement with the humps 29 of the band 27.

In a practical embodiment of the present invention it has been found desirable to use or more holes I91) uniformly spaced about the baffie l9, each being 0.040 inch or less in diameter. Moreover, it has been found desirable to make the radial spacing between the outer periphery of the flame flange 20 and the inner periphery of the upper portion of the baille I9 of the order of 0.006 to 0.008 inch, this spacing being assured by providing small number of radial extensions (not shown) on the flat portion of flame flange 20 extending this distance from the remainder of the outer periphery and seating against the bafile l9. These extensions also center the flame flange relative to the bafile.

While I have shown my invention in the particular embodiment above described, I do not limit y myself thereto as I may employ equivalents there- 7 of without departing from the scope of the appended claims.

I claim:

1. In a burner of the incandescent mantle type, the combination of a chimney having a conical and upwardly converging lower end portion, a gallery having an upwardly converging conical portion within and spaced from the lower end portion of said chimney, said gallery having a seat supporting said chimney, and a cylindrical band around said seat adjacent the lower end of said chimney, the lower end portion of said' chimney having spaced humps extending outwardly and laterally therefrom, and said band having inwardly extending lugs above and engaging said humps and removably holding said chimney on said seat, said humps extending laterally to closely adjacent said band and centering said conical portions relatively to each other to form therebetween a closed narrow air passage, the lower end of said chimney being a plane surface perpendicular to the chimney axis, and said seat having upwardly projecting spacedhumps engaging said chimney end and spacing it above said seat to form a horizontal air passageway under said chimney end communicating with the lower end of said narrow air passage formed by the chimney and the gallery.

2. In a burner of the incandescent mantle type, the combination of a chimney having a conical and upwardly converging lower end portion, a gallery having an upwardly converging conical portion within and spaced from the lower end portion of said chimney, said gallery having a seat supporting said chimney, said conical portions being substantially coaxial and of like pitch throughout and spaced a small distance from each other to form a narrow, closed, conical air passageway therebetween, a cylindrical band around said seat adjacent the lower end of said chimney, the lower end portion of said chimney having spaced humps extending outwardly and laterally therefrom, and said band having inwardly extending lugs above and engaging said humps and removably holding said chimney on said seat, said humps extending laterally to close- 1y adjacent said band and centering said conical portions relative to each other, the lower end of said chimney being a plane surface perpendicular to the chimney axis, and said seat having upwardly projecting spaced humps engaging said chimney end and spacing it above said seat to form a horizontal air passageway under said chimney end, the inner end of said horizontal passageway opening into the lower end of said conical passageway, said gallery defining a seat for an incandescent mantle above and having its side wall in line with said conical passageway.

WALTER B. ENG'H.

References Cited in the file of' this patent UNITED STATES PATENTS Number Name Date 106,302 Adams Aug. 16-, 1870 228,247 Chappel June 1, 1880 1,173,842 Morss Feb. 29, 1916 1,761,616 Davis June- 3, 1930

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