US1670274A - Burner - Google Patents

Description

May 15, 1928.

Fly/f original Filed April 7, 192e IllllllIIIIIIIIIIIIIIIIIIA J. A. oGlLvY BURNER 4 Sheets-Sheet l ATTORNEY May l5, 192,8.

J. A. OGILVY BURNER 4 SheecsLSheet 2 Original Filed April '7. 1926 INVENTOR ATTORNEY v May 15, 192s. 1,670,274

J. A. OGILVY BURNER Original Filed April 7, 1926 4 Sheets-Sheet 3 flllllllllfh;

ATTRNEY May 15, 1928.

J. A. oGlLvY BURNER Original Filed April '7, 1926 4 Smets-sheet 4 l INVENTOR ATTORNEY Patented Nlay 15, 1928. d UNITED STATI-:s

PATENT OFFICE.

JAMES ADAMS OGILVY, OF DETROIT, MICHIGAN.

BURNER.

Application led April 7, 1926, Serial No. 100,378. Renewed-March 12,1928.

The purpose of the present invention is to provide, in a fuel oil burner of the type for installation within furnaces, means for atomizing the fuel such as oil, together with air, into a combustion chamber, the combustion chamber being a part of the' burner and adapted for location Within the lire box of the furnace.

Another purpose is to provide means for A further purpose is to provide adjustable supporting legs affording a substantial advantage in placing the combustion chamber of the'burner in proper position where it will produce ,the best results according to the type and sizeof furnace in which the burner may be installed.

It is to be understood that the particulars herein given .are in no way limitations, and while still keeping within the scope ofthe invention, any desired prop ortions maybe made in the apparatus according to circumstances.

The Iinvention comprises further features and combinations of parts as will be hereinafter set forth, shown in the drawings and claimed.

In the drawings:`

Figure 1 is a view in section of the lower part of a conventional type of furnace, showing its fire box, and illustrating in side elevation the application of the improved" fuel oil burner.

Figure 2 is a plan View of the fuel oil burner. i

Figure 3 is a sectional view on line 3-p-3 of Figure 2.

Figure 4 is a sectional view of the fuel pipe or duct, showing the atomizing device therein, andv also illustrating the fire-pot and one end of the pipe or duct.

Figure 5 isa sectional view through the means for automatically shutting off the fuel or oil, in case the fire-pot of the burner ioods.

Figure 6 is a sectional view on line 6-6 of Figure 5.

Figure 7 is a sectional view on line 7-7 of Figure 1.

Figure 8 is a sectinal ViewK through a modified construction of fuel oil burner for installation within a furnace.

Figure 9 is a sectional view on line 9-9 of Figure 8.

`Referring to the drawings, 1 designates a conventional type of furnace, the lower part I of 'which is shown in section in Fig. 1, and 2 denotes the fire box, and 3 the fuel oil burner as a whole.

'lhe fuel oil burner includes a suitable support 4 in the form of a bench provided with legs 5, each of which consists'of two sections 6 and 7, the sections 6 being rigid with the bench 4, while the sections 7 are adjustable telescopically within the sections 6 and held in different positions by means of screws 8. In other words, the legs are capable of adjustinent to position the burner relative to the furnace according to the type in which the burner is to be installed.

The bench supports a conventional fan housing 9, and a motor 10, that is of an electric type. The shaft 11 of the motor carries a fan 12, and it will be noted that the larger end of the housing 9 is provided with a plurality of shutter openings 13 and a shutter 14, which is capable of rotating on the shaft 11, for positioning the shutter, whereby the openings 15 ofthe shutter may be moved in and out of register with the openings 13 of the end of the fan housing, for the purpose of regulating the amount of air to be drawn into the housin through the air ue or ypipe 16. The shutter 14 has a projection provided with an eye 17, to which a1 rod or the like 18 is connected. The projection passes through an elongated arcuate slot 19 .formed in the end wall of the fan housing, the slot and the projection acting to limit the shutter in different positions according as it may be operated. The shutter may be thermostatically or the purpose of regulating the supply of air into the fan housing. The air duct or pipe 16 has' a flanged collar 20, which is bolted or otherwise secured at 21 to an extension 22 of the air duct or pipe. In fact, the extension has an integral collar 23,-to receivethe bolts 21. It is possible to disassemble the air duct by removing the bolts, either for the purpose of repairs and injected into andoperated either by hand or 'i or for the purpose of accommodating the burners to different types of furnaces.

The extension 22 of the air duct merges into a bowl 24, which may be of any size and shape, preferably as shown, and this bowl has a combustion chamber 25 with which the air and fuel duct communicates. The extension 22 of the air duct has a mixing chamber 26, and located in this chamber is an improved atomizer 27. The atomizer 27 comprises a pair of tubes 28 and 29, the former being located and spaced within the latter, the space between the two acting to permit of the passage of air therethrough, while a passage 31 formed through the tube 28 permits of the passage of the mixture ol oil. In fact, a supply of oil is allowed to enter the passage through the pipe 32. The

tube 28 has its exterior at one end tapered as at 32, while its opposite end terminates in a funnel shaped mouth 34. rIhe opposite ends of the tube 29 are constructed funnel shaped as indicated at 35. The funnel 34 corresponds to and is located within one ot' the funnel ends 35 of the tube 29. The extension 22 has its wall provided with upper and lower slots 36, which are closed by the upper and lower plates 37 and 38, which are secured by screws or the like 39 to the extension 22. The pipe 32 passes through the lower plate 38, and is threaded into the wall ofthe inner tube 28 of the atomizer, the pipe 32 passing through the openings 36 in the wall of the extension 22. The wall of the tube 29 also has a slot 40 for the reception of the pipe 32, permitting the pipe to be connected to the inner tube 28. A retaining screw 41 provided with a hand-wheel 42 is threaded through the upper plate 37, and has a foot 43 at its lower end, bearing upon the wall of the tube 29, for the purpose of holding the tube in different positions. In other words, by adjusting the tube 29 in one direction, its `funnel end 35 may be adjusted relative to the adjacent f unnel end 34 to restrict the passage between such two funnel ends. By adjusting the tube 29 in the opposite direction, the passage or space between said funnel ends may be increased, allowing the greater quantity of air to pass between the two tubes. The oil enters the tube 28, and a supply of air also passes through the tube 28, and tends to lap or pick up the oil and atomize it through the extension 22, where it communicates with theeombustion chamber 25 of the tire-pot or bowl 24. The air passing on between the two tubes will mix.with the oil and air which passes through the tube 28, and tend to further volatilize the oil and thereby produce the proper mixture to enter the chamber 25.

A suitable gas line 44, from any source of supply is threaded into the wall of the fire pot or bowl 24, as at 45, there being a suitable lock nut 46 to hold lthe pipe in position. Rising from the bottom of the chamber 25 is a shield or detlector 47. The outlet 48 ot' the gas line or pipe 42 is in the form of a small orifice, to provide for a pilot light, and

the shield constitutes a guard for the pilot. In fact, the mixture in passing into the combustion chamber 25 is deflected upwardly by the shield 47, thereby preventing the pilot from being extinguished.

The bowl or tire-pot of the burner has a supporting leg 49, which is secured by screws 50 to the wall of the bowl, and this leg coniprises the two sections 5l and 52, the latter telescopically entering the former and may be held Iin ditferent positions by the screw 53. The section 52 of this leg carries at its lower end a. roller or wheel 54, so that the burner proper is portable from one place to another. In other words, the burner is capable ot' bcing placed in a combustion chamber where it will produce the best results according to the type or size of furnace in which the burner may bc installed.

An automatic control for the oil is provided. 'Ihis control is designed to operate to shut olf the flow of oil to the 'atomizer and mixing chamber, through the medium ol' a tiood of oil in the combustion chamber of the lire-pot or bowl of the burner. ln other words, in case the tire or flame rising l'roin the combustion chamber 25 extinguishes, the. oil will flood the chamber 25, and will there fore back-flow through a pipe 56 into a float chamber 57 of the control, and thereby operate the control to shut oit' the supply ot oil to the atomizer and mixing chamber.

The control 55 comprises a casing 58 consisting of two sections 59 and 60, bolted together as at 6l. The section 59 has the float chamber 57, there heilig a suitable drain cock 62 connected to the bottom of the chamber. for draining oli' the excessive back-low ot' the oil.

A disk or plate 64 is clamped between the two sections 58 and 59, there being suitable. packing 65, to insure a tight joint. Rising from the plate is an opstanding tube 66 provided with a cap 67 at its upper end, and :i sleeve 68 at its lower end. 'lhe sleeve 68 is threaded into the base ot' the. tube 66, which constitutes a guide for the valve stem 69. which carries a valve 70 at its upper end and a float 7l at its lower end. lhe valve 7U is otl conical form, and its under conical tace 7l engages with the valve seat 72 formed on the cap 67, while the exterior conical face. 73 cooperates with a valve seat 74 formed on one end of an elbow 75. The end of thtl elbow having the valve seal 74 is threaded into the upper end ot' the section 58 ol' the control 55. A suitable packingr 76 is interposed between the elbow end face and the section 58 of the control. An oil feed pipe 77 from any suitable supply tank (not lll.;

f 59 of the control 55. This air relief pipe is u shown) is connected to the elbow 75 for the purpose of suppl ing oil to the chamber 78 of the control. IThe valve 70 normally engages with the seat 72, that is as long as the oil is properly feeding, and the fire or flame rising from the combustion chamber 25 has not extinguished. A suitable air relief pipe 79 is threaded into the wall of the section designed to be connected to the supply tank (not shown) at a point above the oil level. The oil feed pipe 77 has a suitable manually controlled valve 80, for controlling the supply of oil to the control 55.

In the operation of this improved fuel oil burner, observation will show that oil from any suitable source of supply, preferably a tank, will enter the control 55 through the pipe 77, as indicated by the arrow in Fig. 5.

The oil will flow into the chamberi78 and then through'the pipe 32 to a level substantially flush with the bottom of the interior surface of the inner tube 28 of the atomizer.

This level should correspond to the level of;

the oil in the chamber 78, the valve 80 being set to assist in preventing the oil exceedingY such level. Some suitable automatic control `(not shown) may beemployed to insure regularity of such level.` The oil will fiow slowly into the inner tube 28 and spread in a thin sheetover the lower surface of the passage 31. The atomizer having been adjusted as required, the air through the air duct 16 will pass through'the atomizer' and atomize or spray the oil into the combustion chamber 25, where it is ignited through the medium of the pilot.

As the fire-pot or bowl 24 heats up, the extension 22 and a portion of the air duct are likewise heated, tending to vaporize the pil 1and thereby create a proper combustible In case the fire or flame in the fire-pot 25 extinguishes, and the combustion chamber ,25 floods, the oil will enter the pipe 56 and then into the float chamber 57. When the level of oil in the chamber 57 reaches a height sufiicient to move the float 71 to close the valve 70 against its seat 7 4, the oil in its flowinto the chamber 78 will-be shut off. The drain cock 62 may be opened to drain off the oil from the float chamber 57.` This drain may continue until the level of oil in lthe chamber 57 reaches a proper level corresponding to the level of oil in the pipe 32 adjacent the lower inner surface of the passage 31 of the atomizer.

Where the pipe 56 communicates with the bottom of the combustion chamber 25, a shallow oil pit 81 is provided, where a small quantity of oil may be deposited, when first starting the burner.

While it is the purpose to utilize the air direct from the fan 12, as in Figures 1 to 7, inclusive, it is veryessential in connection with this invention to provide means for, preheatin the air before it enters the aum.- bustion ciamber 25, thereby producing a superior combustion of fuel and hence creating greater heat for the furnace.

In order to carry out this scheme the bowl 24a in Figure 8 has its wall hollow, thereby affording an annular chamber 24". The bowl has an extension 24 provided with ports 24i and 24e. |The extension 22, which corresponds With the extension 22 in F igures 1 to 7, isl bolted at 22b to the air rflue or pipe 16, Figure 8. This extension 22*1 is in the form of a casting and is provided with a semicircular head 22c provided with two selnicircular passages 22d and 22e, the former of which communicates with `the passage of the extension 22, so that air from.

the fan may enter the extension 22, pass through the passage 22d and into the chamber 24". The air circulates around the annular chamber 24b and then passes through the port 24e, then through the passage 22e and thence tothe atomizer 27. The air in taking this course, that is, a'fter leaving the fan, is preheated, consequently when it reaches the atomizer combustion of the fuel is facilitated. The head 22c is bolted at 23 to the extension24, and also to a casing 23", as shown at 23C. In the device shown in Figure 8 the casing23h plays the same part as the extension 22, in so far as providing for the construction and the application of the atomizer, and the adjustability of the tubes 28 and 29, which constitute the essential element of the atomizer,

The casing 23b in Figure 8 is in the form of a-casting, and is separably united to the lower ortion of the bowl 24El as shown at 25% he end of the casing 23b constitutes the bottom or lower section of the bowl, and

is hollow, hence being provided with an oil 4chamber 25b with which an oil pipe 25c from the control 5 5 may' communicate. Inthis way the oil enters the chamber 25b and is preheated prior to its flow to the atomizer through the medium of the pipe 32a. rThis pipe 1n Figure 48 plays practically the same part as the -pipe 32 in Figures 1 to 7, the only exception being that the pipe 32 instead of connecting direct withthe control 55, connects with thechamber 25h, so that after the `oil is preheated it may be conducted to the construction shown in Figure 8 functions the same as the construction in Figures l to 7, inclusive.

The invention having been set forth, what is claimed is:

1. In a burner device, a combustion bowl having a duct leading into the lower portion thereof, means for supplying air along said duct, a tubular member located within the duct and having both ends flaring outwardly, a second tubular member located within and spaced from the. walls of 'said first n'amed tubular 'member and having a flaring entrance end normally spaced from the adjacent flaring end of the first named tubular member, means for conducting fuel into said second named tubular member at the intermediate portion thereof, and means for adjusting the tubular members relatively.

2. In a burner device, a combustion bowl having a duct leading into the lower portion thereof7 means for supplying air along said duct, a tubular member located within the duct and having both ends flaring outwardly, a second tubular member located within and spaced from the walls of said first named tubular member and having a flaring entrance end normally spaced from the adjacent flaring end of the first named tubular member, means for conducting fuel into said second named tubular member at the intermediate portion thereof, and means for adjusting said first named tubular member longitudinally of the first namedv tubular memer to vary the space between the flaring end of the former with respect to the adjacent flaring end of the latter.

3. In a burner device, a combustion bowl, a duct leading thereinto near the lower portion thereof, means for producing a blast of air alone* said duct, an atomizingl device located w1thin the duct adjacent its point of communication with the bowl, a fuel feed pipe leading lo said atomizing device, und a control mechanism interposed between a main fuel supply and said feed pipe and including a easing divided into upper and lower chambers each having an inlet pipe and an outlet )ipe, a valve located within the upper cham er and adapted to close the discharge end of the. inlet pipe thereto, and a float on said valve located within the lower chamber for controlling the position of the valve', a connection between the bottom of the bowl and the float chamber, whereby upon flooding of the bowl said valve will cut ofi' the fuel supply to the control device, said duct having a portion extending peripherally about the bowl to effect preheating of the air conducted to the atomizing means.

In testimony whereof I aflix my signature.

JAMES ADAMS OGILVY.

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