US1711671A - Burner - Google Patents

Description

May 7, 1929.

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H. PQ oLLlNs 1,711,671

BURNER -Filed March 8, 1926 vPatented May 7, I192e.

UNITED, l.STATES PATENT OFFICE.

TO LINOOLN OIL ILLINOIS.

BURNER COMPANY, F PEORIA, ILLINOIS, A. CORPORATION 'OF BURNER.

Application filed March 8, 1926. Serial No. 93,153. y.

My invention relates-more particularly to burners using oil as a fuel, such burners being installed inconnection with a warm air, hot water or steam heating device for heating `various types of buildings, though it is capable of advantageous use for a great variety of other purposes where heat is required and-within the limits of a device of Vthis kind to produce the required amount ofheat.

One object of my invention is the production of a burner of extreme simplicity which shall be automatic in action in that provisin is made for controlling the operation gf the burner by the temperature produced it.

yAnother object of my invention isn the elimination of metering or other fuel pumps, as well as mixing or atomizing valves or devices, as well as a number of parts and appliances which have heretofore been considered necessary in the production of burners of'this general type.

Other objects of my invention will appear and be described i-n the specification.

The novelty of my invention will be hereinafter more fully set forth, and specific-ally pointed out in the claims.

In the accompanying drawing:r

Fig. 1 is a side elevation partly in section, of'a burner embodying my invention.

Fig. 2 is an end elevation of Fig. 1.

Fig. 3 is an enlarged sectional view of the fuel delivery cup.

Fig. 4 is a diagram showing the electrical connections and control devices.

The same numerals of reference are used to indicate identical parts in the different figures.

As showing one form of construction embodying my invention, though without limiting myself tothe precise details of construction or arrangement of parts, but availi ing myself of all changes and modifications 45y which may be made and which fall within the scope ofthe appended claims, I have shown va device constructed as fellows.

I providea base 1, supported by suitable 50 legs 2 and mount upon this base a.motor 3 which drives a sirroceo or other suitable blower indicated by the dotted `line 4 on Fig. 1 and mounted ina suitable housing and ar/rangedl 5, the latter being provided with an air inlet having an adjustable cover 6 for regulating the amount of air handled by the blower. The housing 5 terminates in a discharge portion 7 to .which a tapered blast pipe 8 is attached, the blast pipe projecting into the cmbustion space 9 of any suitable furnace f The base 1 also carries a pair of magnetic valves 11 and 12, the valve 11 Lcontrolling the iow 'of fuel for vthe burner while the valve 12 controls the iow of the fuel for the pilot. f

The fuel is ledto lthe valve 11 by a fuel feed line 13 which extends to yany suitable lsource ofl supply of fuel, the source of Suipply being preferably arrangedto feed gravity, though a pressure feed system may Ybe employed if desired. The 'outlet from the valve 11 is conductedby pipe 14 to valve 155 which controls the amount of fuel 'delivered to the burner. when the valve 11 is opened,- the fuel in leaving the valve 15 then passing through the pipe and conne'c tions 16 and entering the cup 17 which is located within the blast pipe 8 and ap roximately at the discharge endthereo this cup being constructed and arranged as better shown in Fig. 3 the lower portion of the cup being shaped as shown at 18 to the end -that any`over-flow will drain towards the pipe 16.

point 18 instead of creeping back along the- The magnetic valve 12 is fed through pipe 19 and Vdelivers through pipe 2 0y to the pilot 21 and in the installations where gas is used for the pilot the-pipe 20 is preferably provided with mixer 22, somewhat on the type of a Bunsennburner, to admit. air to form a better combustion in the pilot 21. The magnetic valve 12 is provided with an adjustor 23 -by means of Which a constant minimum supply of fuel to the' pilot 21 is obtained, the valvel 12 serving 'to increasel this minimum at certain' periods as will be described later.

As shown in Fig.. 1, aI baiie 24 which preferably consists of a fire briclg or other suit` able refractory substance, is placed before the` discharge end of the 'blast pipe 8 and serves to assist in 'the proper distribution of the flame.

Referring more particularly to Fig. L4, the

electrical circuit comprises the leads 25 and 26 which are connected to any suitable source of current supply, the lead 25 extending directly to one terminal of the motor 3 and being provided with a branch 27 leading to the valve 12; the lead 26 extending "to one terminal of a thermostat 28, from the stat 32 is mounted, this thermostat controlling a switch consisting of blades 33 and 34 whichnormally separate to open circuit position but which are closed to the position shown by the thermostat 32 when the latter is cool, though when heat passes through the stack 31 the thermostat moves toward the center of the stack and permits the switch blades 33 and 34 to separate. The blade 33 is connected by lead 35 with the other terminal of valve 12 while the blade 34 is connected through lead 36 with lead 29 thus forming a shunt circuit through the valve 12 when the thermostat 32 is cool and when @the thermostat 28 closes the circuit between the leads 26 and 29.

The magnetic valves 11 and 12 may be of the usual or any suitable construction and comprising a solenoid coil mounted to control a needle or other suitable valve arranged in the pipe lines, magnetic valves of this type being at present on the market and their construction and operation is no part 'of the present invention.

The operation of the device is as follows:

Assuming the pipes 13 connected to a suitable source of fuel su ply, the pipe 19 connected to a supply of fuel for the pilot, and the leads 25 and26 connected to a source of current supply and the remaining parts of thev device arranged as shown in the drawing.

The thermostat 28 is located at a point at which it is desired to control the operation of the burner, say in one of the rooms of a dwelling v,when the burner is installed for heating such dwelling, and the thermostat is set to a temperature at which it is desired to maintain the dwelling.

When the temperature at the thermostat drops below its point of setting, the circuit is closed between the leads 26 and 29, energizing the coil of valve 11 to open it and starting the operation ofthe motor 3 while at the same time the shunt circuit through the valve 12 is closed, energizing its coil, and opening this valve to increase the amount of fuel delivered to the pilot 21 it being understood, through the medium of the adjuster 23, the valve 12 has been regulated Jto supply l fuel to the ilot to keep it in operation, and assuming urther that valve 15 has been regulated to supply the proper amount of 'fuel to the burner itself. The closing of the shunt circuit supplies additional fuel to the pilot 21 so that a relatively large iiame occurs' immediately in front of the blast pipe.A The starting of the motor produces a blast of air through the pipe 8 and the opening of the valve 11 permits a iiow of fuel to the cup 17 and as the fuel arrives at a point near the rim, it is carried away from the cup by the blast of air, the fuel being carried away in very finely divided particles which are further broken up by contact with the deflector 24 and ignition occurs as the fuel leaves the deflector. As soon as the burner is in operation, the products of combustion pass through the stack 31, and come in Contact with the thermostat 32 heating the latter and causing it to `operate, thus opening the circuit between the leads 36 and 35 and permitting the magnetic valve 12 to close which reduces the fuel at the pilot 21 to its minimum burning condition at which it remains till the next succeeding o eration of the burner.

When t e temperature in the place where the thermostat 28 is mounted has risen a suiiicient amount, this thermostat opens the circuit through the motor and the valve 11, stopping the motor and shutting off the supply of fuel to cup 17 in which conditionthe parts remain till the temperature again drops to a point causing the operation of the thermostat 28.

- It is of course understood that any suitable switch may be interposed in either or both of the leads 25 and 26 to close down the operation of the burner as in the summer time or when the occupants may be away from the dwelling for any extended periodof time.

It will be seen from the above that with the exception of the two magnetic valves 11 and 12, there is only one operating part to the burner and that is the blower, driven by ther motor 3, and further that the fuel delivery consists merely in the pipe and cup 17 which is locatedwithin the blastf i By* constructing and arranging the fuel delivery as above set forth, it will be noted that there is no vaporization or distilling of the fuel at its point of delivery hence there is no tendency or liability of-the formation of carbon or other deposits'in orl around the cup 17.

It will be further noted that the action of the air in passing through the blast pipe picks up the fuel and divides it into line mist or spray which is carried by the air and later ignited.

Having thus fully described my invention I claim: J 1 1. ln a burner Athe combination. of a blower, a blast pipe from the blower 'to a 5 furnace,` a fuel deliveryV cup opening upwardly and located near the discharge end of the blast Jpipe and within theA area thereof, and means'for supplying fuel to -t vv'said cupvfto fill the latter so that the passage 'lo of air through the blast pipe will pick up and disintegrate the fuel. f

2. ln a burner. the combinationy of a blower, a blast pipe leading from the blower to a furnace, a fuel delivery cup opening upwardly and located adjacent to the disc arge end of the blast pipe and within thel area thereof, -a motor for the blower, a circuit for the motor, and a magnetic valve in the circuit whereby when'the motor is inv operation the magnetic valve will be opened to permit a flow of fuel to the cup to fill and overflow `the latter and permit. the air in passing through the blast pipe to 'pick up the', fuel and carry it to the point of combustion.

r v HAROLD P. COLLINS.

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