US2570996A - Oil burner - Google Patents

Description

5 Oct. 9, 1951 M. wALsHlN 2,570,996

OIL BURNER Filed March 15, 1947 ATTORNEY Patented Oct. 9, 17951 -FFCE OIL BURNER Murray Walshin, New York, N. Y., assignor to Silent-Flame Man.ifacturingv Co., Inc., New York; N. Y., a. corporation of New York Application March15, 1947; Serial No. 735,007

(CL. 15S-76) 1 Claim; 1 The present'inventionrelates to oil burning equipment and more particularly to oil burning equipment of the type utilized for heating purposes in homes, factories, and the like.

One of the diiiiculties or objectionsA to be contended with in the operation of oil burning equipment is obtaining the most ecient or optimum combustion conditions for each particular installation. An idealsituation would result if it were practicable to tailor make each individual oil burner for the particular home and conditions where it isY to be used; this, however', is not feasible. lin actual practice one size or capacity of oil burner is used in or serves within a range of conditions. While under this practice an oil burner for a given range of conditions may perform fairly well when operated in a furnace, it frequently does not"nt exactly into the particular installation so as to give optimum combusticn. The most favorable intermixing of air and iinely divided orv atomized oil and the best shape and size of flame are frequently lacking. ResultingV incomplete combustion causes the use of increased quantities of oil in order to obtain additional heat and this results in higher operating costs.

The present invention aims toovercome or minimize the above andv other difliculties or disadvantages by providing a relatively simple meansby which there may be obtained greatly improvedy combustion for any given oil burner installation.

An object of the present invention is to provide a new-andino-proved oil burning mechanism.

Another object of the invention is to provide an improved oil burner adapted to extend the iield oi usefulness of the particular oil burner.

Another object is to provide an improved o il burningdevice, the partsl of which may be selectively related to give increased combustion efiiciency.

Still another object of the invention is to pro- =vide improved means vadapted to facilitate obtaining a most Vdesirable shape and size ofA flame.

Cther and further objects of the invention will heA obvious upon an understanding of the illustrative embodiment about to be described, and various advantages not referred to herein will occur to one skilled in the art upon employment of the-invention in practice.

Avpreferred embodiment of the invention has been. chosen for purposes of illustration-and description andv is shown in the. accompanying drawings, forming a part of thev specifica-tion, wherein:

Fig. l is a perspective view illustrating one form rofthe present invention; Y

`Fig. 2 is a fragmentary sectional view illus'- trating part of the oil burner shown in Fig. i;

Fig. 3 is a fragmentary view showing in greater detail a portion of the device illustrated in Fig. 2;

4 is a top view oi the portion of the oil burner shown in Fig. 2;

Fig. 5 is an enlarged fragmentary view illustrating in greater detail a portion of Fig. 4; and

Fig. G is a sectional View taken along the line i-- of Fig. 5.

Referring to Fig. 1 of the drawings there is shown anoil burner comprising a base i having a pedestal 2 extending upwardly therefrom and supporting a housing The housing li has an electric motor 5 mounted at one side thereof adapted to drive a fan or blower (not shown) located within the housing when in use the blower draws air from the atmosphere and forces it through a cylindrical blast tube l shown extending outwardly from one side of the housing fi. The motor-5 is also adapted to drive an oil pump or oil supplying means which may be located at the opposite side-of the housing 5i; the oil pump may receive fuel oil from any-suitable source of supply and, in the present embodiment, discharges it into a conduit or oil line IQ. The housing i may be adjusted in height with respect to the base i by suitable threaded means or the like connected with the pedestal 2.

The present invention is directed more particularly to the combination of, an improved; blast tube l with certain other parts adapted to co-operate with it. rEhe construction oi' this tuberand its co-operatingparts will now be described.

rThe blast tube is shown more 'particularly in Figs. 2 and. 4. of the drawings and may comprise a cylindrical tube or shell il adapted to extend close to or through a furnace wall.r rIhrough the blast tube` extendsan axially disposed oil conduit or oil line i3. Air from the atmosphere is normally forced.- through the blast tube il, around theoutside of the oil conduity i3. by the previously referred to fan cr blower rotated by the electricrnotor 5. Oil to be burned for furnishing heat tend through a closely fitting opening 25 to thereby minimize leakage of air out of the casing 4 or blast tube I I around the wires.

As the air passes through the blast tube it is given a whirling or cyclonic effect by vanes carried by a suitable vane unit 31 and end cone 23. These vanes are preferably similarly inclined or pitched so that each set of vanes rotates the air in the same rotary direction. Hence air emerging from the end cone 23 is rapidly whirling or rotating.

With oil burners the shape and size of the ame and the degree of combustion is considerably affected by the relationship of the blast tube which conveys air to the interior of the furnace and the oil tube and nozzle which furnish oil to the interior of the furnace. A blase tube generally carries vanes fixed in position at its outer end and an oil conduit with a nozzle xedly positioned with respect to the blast tube and an end cone. The particular relationship of these parts greatly affects the shape and size of the flame in the furnace pot and the degree of combustion, these qualities being generally ixed for a particular oil burner.

In the present invention (Figs. 2 and 4) there is shown an inner cylindrical or tube-like member 25 telescopically or slidably fitted into the outer tube-like portion I I. The auxiliary tube 25 carries an end cone, with suitable vanes, adjacent its outer end and is adapted to be moved to and fro with respect to the tube portion II to vary the eiective length of the blast tube, which tube is designated generally by the reference numeral 1 in Fig. 1. The effective length of the blast tube 1 and the spacing of the vanes 22 from the fuel nozzle I4 may thus be varied by shifting the tube 25 longitudinally. The outer tube I I is provided with a longitudinally extending slot 25 through which extends a screw or bolt 21 threaded into the inner telescoping tube 25. The bolt 21 serves to limit the extent of longitudinal movement of the tube 25 with respect to the tube Il and minimizes the possibility of accidentally moving the tube 25 outwardly so far as to disengage it from the outer tube Il. The bolt 21 may be tightened to securely lock the tubes together in an adjusted position.

While the extensible tube portion 25 is shown mounted interiorly of the tube portion I I, it will be clear that it could be of slightly larger diameter than the tube portion II so as to slide over the exterior of the tube II.

The rearward part of the inner tube 25 is shown connected with an extension or rod 23 which projects rearwardly to a position in the blower casing 4. The extension or rod 28 may be attached by welding or any other suitable manner to the tube 25. Adjacent the end of the extension rod 28 the housing 4 is provided with a slot or opening 29, the relationship of the slot or opening to the rod 28 preferably being such that the rod or a portion of it overlies the slot 29; this overlying or covering feature tends to close'or seal the slot 23 so that air forced to and through the blast tube does not escape outwardly through the opening 23.

A handle or arm 3I may be connected with the rod 28 so that the handle SI projects through the slot 23 t0 facilitate longitudinal movement of the rod 28 and the blast tube extension 25 carried thereby. Of course, in order to move the blast tube extension 25 through the rod 28 and handle 3| it is rst necessary to release the bolt 21 at the upper part of the blast tube; after the blast tube 25 has been adjusted the bolt 21 may be tightened to maintain the desired adjustment. Preferably the handle 3l is connected with the rod 28 at a point removed from the extreme end thereof so that When the handle is moved to an extreme position adjacent the forward end 32 of the slot 29, a portion 33 ofthe rod 28 remains in overlying relationship with respect to the opening 23 to thereby prevent escape of air out through the opening 29.

The housing 4 may be supplied with suitable indicia 35 to facilitate obtaining desirable setting of the tubes with respect to each other and likewise the outer blast tube I I may be furnished with suitable indicia 34 (Fig. 4) to facilitate obtaining the adjustment.

The foregoing described telescopic construction facilitates movement of an end cone 23 and its vanes 22 with respect to the oil conduit I3 and the nozzle I4 carried thereby and thus contributes toward obtaining a most favorable shape and sizeof flame in the furnace. The construction above described provides what may be termed a rough adjustment and facilitates positioning of the end cone 23 and its vanes 22 with respect to the wall of the furnace with which the burner is to be used.

In order to obtain a ner adjustment of the flame and to facilitate. correct positioning of the nozzle I4 with respect to the end cone 23, the axial oil conduit I3 is also constructed and assembled for longitudinal positioning with respect to the blast tube.

As shown, the oil conduit I3 is supported adjacent one end thereof by a vane unit 31 and it may be held in assembled relationship with the vane unit by a set screw 38. The vane unit 31 is adapted to be moved to and -fro with respect to the walls of the outer tube; a slidable fit facilitates movement of the vane unit 31 and the oil conduit I3 supported thereby. As previously described, the forward end of the oil conduit I3 is connected with a suitable discharge nozzle I4 by a coupling member I5. The opposite end of the oil conduit I3 is provided with a bend or curve 4I) (Fig. 4) so that the rear portion of the conduit I3 extends laterally with respect to the blast tube and projects through a side wall of the housing 4 at a position adjacent the slot 29 and controlling handle 3I which serves to facilitate adjustment of the blast tube extension 25. The laterally extending portion of the conduit I3 projects through a slot or enlarged opening 4I in the housing wall and is shown carried by a boss 42 of a plate member 43. rThe plate member 43 is provided With an adjustment slot 44 through which extends a bolt 46. The bolt 46 has a head portion overlapping the side walls of the slot 44 so that it may be utilized to support the plate member 43 and to lock it into position, as will be hereinafter described.

The Outer end of the laterally extending Dortion of the conduit I3 is shown connected with the oil conduit II] by a coupling member 41 so that oil forced through the conduit I0 by the pump 8 passes into the conduit I3 and through it to the nozzle I4. lThe conduit I@ which connects the axial conduit I3 with the oil pump 8 is preferably formed with curves of relatively large radius. When the bolt 45 is loosened the plate member 43 may be shifted longitudinally with respect to the blast tube 1 to thus correspondingly move the axially disposed oil conduit I3 along the blast tube. The vane unit 31 which supports the oil conduit I3 within the blast tube slides along the tube and maintains the oil conduit in centrally disposed position. The enlarged bearing surface provided by the boss 42 of the plate member 53 minimizes cutting or digging into the conduit I3; this is desirable as the conduits are generally made of copper and hence are relatively soft. Longitudinal movement of the plate member 43 and the oil conduit I3 which projects thereinto is facilitated by bends of relatively large radius provided in the connecting conduit I9. These bends flex or yield suiciently to allow movement of the plate 43. When a correct adjustment has been obtained the guiding and clamping bolt 43 may be tightened to maintain the adjusted relationship of the oil conduit I3 within the blast tube.

As pointed out hereinabove, a relative rough adjustment may be obtained by shifting the blast tube extension 25 and a finer adjustment may be obtained by thereafter shifting the conduit I3. This feature is desirable as the burner may first be installed and adjusted to approximately correct position by shifting the blast tube extension 25. Thereafter a more perfect or finer adjustment may be made by shifting Ythe conduit I3 and its nozzle i4 with respect to the vanes 22 of the end cone 23.

Preferably the vanes 22 of the end cone 23 and the vanes of the vane unit 31 are of the same or similar inclination or pitch so that when air passes through the vane unit 31 it is given a whirling motion which is even further enhanced upon striking the vanes 22 of the end cone 23.

If desired the plate 43 may be provided with an arrow or indicating mark 48 and the housing wall may be provided with suitable indicia or markings 49 to facilitate obtaining a correct adjustment or to obtain a correct resetting.

It will be seen that the present invention provides a new and improved oil burning mechanism which is adapted to facilitate accurate adjustment of a ame. The ame may be focused to make it longer, shorter, wider, iiatter, thinner or to otherwise change it into various desirable shapes and sizes. The accurate adjustment and control of the iiame provided by the rough adjustment of the end cone carried by the blast tube extension, and the more delicate or finer adjustment facilitated by the movable oil conduit, contribute toward more eiiicient and complete combustion of fuel oil and hence result in decreased oil consumption and increased e'iciency. The improved combustion provides a cleaner furnace and reduces the amount of smoke generated. The construction is adapted to incorporation in oil burners of different sizes and the cooperating parts may be made in any suitable dimensions and from any suitable materials. The parts are of relatively simple construction and delicate adjustment of the flame may readily be made.

As various changes may be made in the form,V

Y and not in a limiting sense.

Having thus described my invention, I claim:

An oil burner device of the class described comprising the combination of a fixed air guiding tube having an opening through a side wall thereof and a slot through a side wall thereof, a movable air guiding tube provided witha set of air guiding vanes adjacent the outer end thereof and having uninterrupted exterior and interior wall portions extending a substantial distance rearwardly from said air guiding vanes, said movable air tubebeing telescopicallyslidable along the iixed air tube, a longitudinally movable oil conduit disposed centrally within said air tubes, a set of air guiding vanes secured to and supporting said oil conduit at the interior of said uninterrupted rearwardly extending portion of the movable air tube and slidable along the interior thereof upon longitudinal movement of said tube or upon longitudinal movement of said oil conduit, a portion of said oil conduit extending laterally through said wall opening of the fixed air tube for connection with an oil pump, and an arm connected with said movable air tube and extending through said slot through the fixed air tube side wall to a position a substantial distance outwardly of the fixed air tube for facilitating movements of the movable air tube.

MURRAY WALSHIN.

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

UNITED STATES PATENTS Number Name Date 1,783,405 Celander Dec. 2, 1930 2,013,816 West Sept. 10, 1935 2,065,042 Berryman Dec. 22, 1936 2,094,943 Gianola Oct. 5, 1937 2,120,626 Powers et al. June 14, 1938 2,156,359 Smith May 2, 1939 2,163,915 Reif et al June 27, 1939 2,191,272 Chadima et al. Feb. 20, 1940 2,287,595 Beckett June 23, 1942 2,308,439 Carroll Jan. 12, 1943 2,360,924 Wolfert et al Oct. 24, 1944 2,393,897 Glendenning J an. 29, 1946 2,473,769 Schinman June 21, 1949 2,502,210 Demuth Mar. 28, 1950

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