US1461908A - Oil burner - Google Patents

Description

July 17, 1923. 1,461,908

1 H.` IZARD OIL BURNER Filed March 8,' 1921 2 Sheets-Sheet 1 ITU/P/VE Y July 17, 1923.- 1,461,908

H. IZARD OIL BURNER Filed March e, 1921 zsheets-sheet 2 atented July 17, 1923.

`HENRY IZARD,'OF PORTLAND, OREGON.

OIL BURNER. f

Application led March 8, 1921. Serial No. 450,562.

To all whom t may concern.'

Be it known that I, HENRY IZARD, a citi zen of the United States, and resident of Portland, in the county of Multnomah and State of Oregon, have invented a new and useful Uil Burner, of which the following is a specification.

This invention relates more partlcularly to devices for burning oils in furnaces.

The objects of my invention are to provide an automatic control for heat, and to produce this heat in the most economical manner with a minimum amount of labor or danger.

I attain these results in the manner set forth in the following specifica-tion and illustrated in the accompanying .drawings in which:

Figure 1 is a side elevation of the device with portions cut away. Figure 2 is a plan of the combustion box with the air discharge pipe removed. Figure 3 is a front eleva tion of the device showing the means for varying the speed of the fan. Figure 4 is a vertical section along the line 4 4 in Fig. 1. A Y

Similar numbers of reference refer to the same'or similar parts throughout the several views.

Referringin detail to. the drawings I have constructed my device as follows: The circular box within which the combustion takes place is provided at each side with a lug 11 through which pass the vertical standards 12 which are secured by means of the set screws 13 when the box is at the desired height. A

Around the ,upper edge of the box 10 I have provided a bevelled ring 14 which is easily removable and whose function it is to turn the flame back to the center of the box thereby assistingin securing complete combustion of the fuel. A baie plate 15 is mounted on a nipple 16 which threads into the bottom of the combustion box. A pilot light jet 17 consisting of a perforated pipe plug `underneath the -baiiie plate v15 1s adapted to partly close the openingof the gas pipe 18. A drain pipe 19 leads from the bottom of the box 10 to a horizontal pipe 20 containing a trap 21 having" an outlet 22 at approximately the same height as the pipe 20. y It will be understood that the combustion box l() and its attachedprts are within the furnace and that the trap 21 is on the outside of the furnace. .l

` At some distance in front of the furnace on the pedestal 23 is mounted a base plate 24 upon which is secured a box-like frame 25 having a half partition 26 near its center and a cover 27 on the furnace end and a second cover 28 on the opposite end. Behind the cover 28 and attached tothe partition 26 is a rheostat 29 joined by means of the wires 30 to the motor 31 which drives a fan within the casing 32.

. Behind the cover 27 is mounted a mechanism 32A such as are commonly found in the market today and are known as reversible motors which are Wired in a three 'Way circuit containing a thermostat 33 whose maximum temperature Will close the circuit of the motor in the mechanism 32A and cause the crank 34 to make a complete revolution in lone direction. and the mini- -mum temperature on the thermostat closing the other side of the circuit which causes the crank 34 to make a complete revolution in the opposite direction.

The fuel consumed by this device passes through the pipe 35 containing the valve 36 which is operated by the slotted lever 37 whose one side 38 is considerably longer than the side 39. A pin on the crank 34 Ais adapted to engage the slot between the members 38 and 39. A clock-wise movement of the crank 34 Will move the lever 37 to the right and a counter-clockwise movement will move same to the left, thereby opening or closing the valve 36 as the case may be.

Mounted Within the case 25 is a knife switch 41 whose handle 42 is joined by means of a connecting rod 43 to the lever 37. A spring` 44 on the end of the rod 43 insures a rapid breaking of the circuit and the collar 45 on the rod 43 insures a positive return of the knife plate in the op posite direction.

The pipe 35 also contains a manually controlled valve 46 by means of which the flow of oil to the burner is regulated in proportion to the speed of the fan. A third valve 47 in the pipe 35 is supplied with an operating lever 48 from the raised end of which is suspended a cup 49 which is underneath the outlet 22 of the pipe 20. If desired a weight may be attached to the end 50 of the lever 48 to over-balance the cup49.

An air pipe 51 conveys the air from the fan to an elbow 52 which is joined by a dove tail 53A to the combustion box 10.

Ithe crankI 34 will open the valve 36 and..

close the switch 41 which starts the airl fan; The Hame from the pilot light 17 ignites the atomized fuel now projected against the baiie plate 15, and when the temperature at the thermostat reaches its other limit the crank 34 is operated one revolution in theopposite direction, thereby stopping the fan and cutting o the How of oil.

The pilot lamp, of course, may be fed by gas 0r kerosene withoutdeparting from the spirit of my invention. If for -any reason this flame should become extinguished and oil accumulate in the box 10 it would run out through the trap 21 into the cup 49 and automatically cut off further ow of oil. The trap 21 prevents the escape of gas or flame from the outlet 22 ofthe waste pipe 20 during ordinary operations.

It will be understood that whenA this device is used in greenhouses and under small boilers where there is no danger of developing too much heat that the automatic re l ulation may be dispensed with, but it 1s always desirable to be able to control the relation between the fuel and air consumption.

l have constructed the members 10, 14, 52 and 53 of aluminum bronze composed of approximately ten per cent of aluminum and ninety per cent of copper, as experience has indicated that this is the onl metal which will withstand the action of t e flame thus produced, and l regard'it as an essential to the success of my invention.

While l have thus illustrated and described my invention it is not my desire to limit myself to this precise form or method of application, but intend that it shall cover all forms and modifications that fall fairly within the appended claims.

What I claim is.:

1. In an oil burner, the combination of an'open to combustion box having a baille plate in t e center of its bottom, an inverted air suppl ing elbow suspended over the side of said liox and discharging downl wardly upon said baille, an oil feed pipe Within said air pipe and a gas pilot lamp within said combustion box.

2. In an oil burner, the combination of an open top combustion box having a baille plate in the center ofits bottom with an inverted air supplying elbow suspended over the side of said box and having its outlet over said baille plate, means for forcing air through said elbow against said baille and an oil supply pipe within said elbow and having its discharge over said bale.

3. In an oil burner, the combination of an open top firebox having a baille plate in the center of its bottom with an air Supplying pipe adapted to discharge air downwardly against said baille, an oil supply pipe Within said air pipe whose outlet is alsoover said baille a cutoff valve in said oil pipe, a `lever for operating saidvalve, a container for liquids attached to said lever and adapted to close said valve when liquid is placed in the container and a trapped drain pipe leading from the bottom of said combustion box and discharging into said container.

.4. In an oil burner, the combination of an aluminum bronze combustion box having an open top, a bailieplate of the same metal mounted in the center of the box, a

.pilot lamp under said baille plate, a drain pipe in the bottom of said box, adjustable standards secured to the sides of said box, an air pipe joined to the side of said box by means of a dove-tailed elbow, a discharge ti for said air pipe.` consisting of a return liend of aluminum bronze mounted on said elbow and terminating above said baille plate, and a fuel ipe passing vertically into said elbow andp terminating .above the open end of said return bend. v HENRY IZARD.

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