US2102367A

US2102367A - Burner and fuel control mechanism

Info

Publication number: US2102367A
Authority: US
Inventors: Lumsden David
Original assignee: Individual
Current assignee: Individual
Priority date: 1935-12-21
Filing date: 1936-12-22
Publication date: 1937-12-14
Anticipated expiration: 1954-12-14

Description

Dec. 14, 1937. D. LUMSDEN BURNER AND FUEL CONTROL MECHANISM Original Filed Dec 21, 19:55

.Da vz'd Lwmsden Patented Dec. 14, 1937 UNITED. STATES ear-E T- orrlcep 5,644? Divided and'this applicationDecem berf22y1936pSerial' No. 117,195

6 claims; (01. 158-84).

This invention relates to an improved burner and mechanism'for controlling fiowpffuel 'to the same and while it is particularly adapted for use as a burner for a water heater it is to be understood that it may beused wherever found practical. The present application constitutes a division of my'co-pe'nding application for a patent upon an improved Burner and fuel control filed DecemberZl, 1935; Serial No.'55,644

One object of V the inventionis to provide a burner adaptedto burn liquid fuel, such as coal oil, the burner including "a main wick and an auiL'liary wick so associated with the main Wick that fuel may be supplied either to only the auxiliary wick or both themain wick and the auxiliary wick;

Another object of the invention is to so mount the auxiliary wickwhich'may be referred to as a pilot light that fuel fed through a single pipe may be supplied to the'auxiliary wick and the main wick and thus make'it unnecessary to provide a supply pipe for each wick.

Another object of the'invention is to so construct and mountthe fuel su pply means that fuel maybe supplied to the" auxiliary wick after oil 7 in the pan carrying the'main wick and into which the auxiliarywick extends has been reduced by consumption to such an extentth'at the main wick will become extinguished; t

Another object of the invention is to provide the burner with improved m'ansfor controlling the length of time the main wick will burn after flow o'f'fu'el'from a source'of supply has been shut off, the said means being of such'oonstruction that adjustment may be very easily made. 7

The invention is illustrated in the accompanying drawing, wherein the figure shows the improved burner and the fuel supply and regulating mechanism partially in side elevation and partially in vertical section.

In'the accompanying drawing, the numeral I!) indicates the lower portion of a water heater in which the improved burner is mounted and it will be understood that this heater may be of any desired construction which will permit water to 'be heated by hot products of combustion passing upwardly through the'same from the: burner which is* mounted in the lower portion of the heater. This burner has'an annular fuel pan II which is U-shaped in cross section and open at its top. It carries the usual chimneycr hood [2 and combustion tubes, as'shown in the copending application referred to above, and it also "carries a main wick l3 and an auxiliary wick Ill; The auxiliary wick is dis'posedvertically in the fuel pan between ends of the main wick and its lower portion extends downwardly through 7 an opening formed in the bottom of the fuel pan into a nipple l5.f It should Ice-noted; that-this auxiliary wick extends downwardlyintothe en-' larged lower portion mar ne; nipple so' that oil may accumulate in the nipple about the lower portion of the auxiliary wick and 'a portiori 'of" this oil move upwardly through the wick into the fuel pan to supply fuel to the main wick when 10' both the main wick arid-theauxiliarywick are burning. Ametal'casing l1 hasb'een'shownpro- V vi'ded about the auxiliary wick as 'di'sclosed in the co-pending application referred toabove, and it is to-be understood thatthis casing has its 15 lower portion open, as shown at lBQf s o that oil inthe nipple can easily reach-the wick. 1 The upper portion of the c'asihgis formed withside openings so that oil 'mayflow through the side openings and into the fuel pan. In order to supplyiuel to the nipple, there has been pro'vided'a pipe 19 leading" from the de pending neck 28 of a cup 2 I which is mounted at oneside of the heater H). Anelb'ow 22 is threaded upon the oth'er'end ofthe fuel pipe 19 to' project 25 upwardly therefrom and this elbow has threaded engagement with the lower" portion 23' of a union ill-which projects-upwardly therefrom and has its upper'pQrtion-ZS in th'readed engagement with the nipple. The pipe 19 is providedwith an up- Wardlyextending arm or; branch 26' which pro jects upwardly into the lower end of the heater and at its upper end carries acup 21 serving asan auxiliary oil chamber, This cup or auxiliary chamber is formed with an opening 28"in its b'ottointhrough whichoil may flow and the upper end of the cup is closed by'a removable cap 29 which is preferably threaded into place but may' be removably secured in any manner desired. "It is desired to permit'the capacity of thecu'p to be: 40 varied according tothe'length of time it isdesired to have 'the main wick burnafter flow of oilhas been automatically shut 'ofi and-in order to do so 'wallsof the cup carry inwardly extending'lugs" or blocks 30 which are preferably three in num her and serve as supports fora disc 3| whichcon-f a stitutes one of a number of discs of various thick-T nesses and has its lower face slightly below-the level of the bottom of the oil 'pan when-in place; When a relatively thin disc'is set in place only a 5 small portion of the capacity'of the cup willpbetaken up by the disc, whereas when a thicker idisc' issubstituted in place of 'a thin disc a'larger por"- tion of the interior of the cup willbetaken-up by the disc and a proportionately smaller quantity: V

end thereof.

of 011 will be required to fill the cup to the level closed by a cap or head 32 formed with an upwardly extending neck 33 with which a pipe 34 is connected. This pipe 34 extends from a suitable source of fuel supply and the fuel flows through the neck into the cup 2| and through perforations of the tube 35 into the passage 36 of the neck 20. From this passage 36 the oil flows through the pipe I9 and from this pipe into the auxiliary chamber or cup 21 and also through the nipple I5 and the tubular casing of the auxiliary wick into the oilpan or trough A perforated disc 31, which serves as a valve seat, is secured in the passage 36 under the lower end of the tube 35 when this tube is screwed tightly into, place and through this tube extends a stem 38 having a' spherical head 39 at its lower end and which'serves as a valve and shuts off flow of 'oil from the tube 35 into the passage 36 when seated against the valve seat '31. At its upper end the stem 38 is pivoted to one end of an arm 40 which has its other end pivoted to a support 4| mounted externally of the burner in any desired manner and the lower end of a rod 42 is pivoted to the arm 40 near the pivotally mounted This rod 42 constitutes part of a conventional mechanism having a thermostat associatedtherewith which will cause the arm to move downwardly when water which is being heated attains a predetermined temperature and it will thus be seen that, when, the predetermined temperature has been reached, the arm 40 will be swung downwardly to lower the stem 38 and move the valve to a seated position in which flow of oil through the passage 36 Will be shut off. When this occurs, the main wick will continue burning until the level of the oil which is normally at the height, indicated by the dot and dash line A-A, has been reduced to such a level that it is below the lower end of the main wick I3 and this wick will then be extinguished due to lack of fuel. The pilot wick will, however,

continue burning as its lower portion will still be immersed in oil and, therefore, when the temperature of the water has been reduced to a predetermined temperature at which time the rod 42 will be drawn upwardly and move the valve 39 off the seat, oil will again flow through the passage 36 into the pipe 2| and fill the auxiliary chamber 21 and oil pan II to the normal level in which oil will be fed to the main wick l3 and the main wick then ignited from the pilot wick. Oil in the main chamber or cup 2| is to be maintained at the normal level, indicated by the dot and dash line previously referred to, and in order to do so, there has been provided a float 43 which is pivoted to a depending hinge ear 44 carried by" the cap 32 at one side of the bore 45 of the neck 33. The bracket 46, by means of which the float is pivotally connected to the ear 44, has one portion bent to form a leaf 4'! and this leaf, which is disposed in overhanging relation to the bracket and is formed of resilient material, car-' ries an upwardly extending needle valve 48 adapted'to enter and close the opening 49 formed in a disc 50 mounted in the neck 33 and defining an upper chamber 5| from which the bore 45 leads. It will'thus be seenthat, when the float is moved upwardly by oil in the main chamber or cup 2| to the position shown in the drawing, the needle valve by entering the opening 49 will shut oil flow of oil from the chamber 5| and as the oil is consumed the float will be moved downwardly until the needle valve is moved to an open position in which it allows additional oil to flow into the main chamber. Therefore, oil in the main chamber will be maintained at the desired level and oilfed to the trough or oil pan until the Water has been heated to the desired temperature at which time the valve 39 will be closed. to shutoff flow of oil through the passage 36 into the pipe l9. The main wick will then continue to burn until oil in the auxiliary chamber and the oil pan has been reduced to such a leveL that the valve 39 will be again moved upwardly: 25

to permit flow of oil through the passage 36, the;

main wick will be ignited.

Having thus described the invention, what is claimed as new is:

' l. A burner including a fuel pan having a fuel inlet opening at its bottom, a fuel chamberhaving a valve controlled inlet at its top, a fuel pipe leading from the bottom of the fuel chamber forsupplying fuel to the fuel panthrough the inlet thereof, an auxiliary fuel chamber above the fuel pipe having an outlet at its bottom communicating with the fuel pipe between the fuel chamber and the fuel pan, a valve for controlling flow of fuel from the fuel chamber through the fuel pipe into the auxiliary chamber and the fuel pan, float controlled means in the fuel chamber for closing the inlet valve thereof and preventing filling of the fuel chamber, auxiliary chamber and the fuel pan with fuel beyond a predeterminedi level, and removable means in the auxiliary; chamber for controlling the effective capacity of" the auxiliary chamber.

2. A burner comprising a fuel pan having a fuel inlet at its bottom, a fuel chamber spaced laterally from said fuel pan and having an upper portion above the plane of the bottom of the fuel pan, said chamber having a fuel inlet, a fuel pipe leading from saidfuel chamber to the fuel inlet of said fuel pan, an auxiliary fuel chamber above the fuel pipe extending upwardly above the plane of the bottom of the fuel pan and having an outlet at its-bottom communicating with the fuel pipe, float controlled means for controlling; flow of fuel into the fuel chamber, a. valve for controlling flow of fuelfromthe fuel-chamberthrough the fuel pipe, and a removable body in the auxiliary fuel chamber for displacing a pre determined quantity of fuel'above the planeof the bottom of the fuel pan."

3. A burner comprising a fuel pan having a fuel inlet at its bottom, a fuel chamber spaced laterally from said fuel pan and having an upper portion above the plane of the bottom of the fuel pan, said chamber, having a fuel inlet, a fuel pipe leading from said fuel chamber to the fuel inlet of said fuel pan, an auxiliary fuel chamber above the fuel pipe extending upwardly above the plane of the bottom of the fuel pan, an arm connecting the fuel pipewithan outlet at the 7 trolled means for controlling flow of fuel into the fuel chamber, a valve for controlling flow of fuel from the fuel chamber through the fuel pipe, supporting means in the auxiliary fuel chamber, and a removable body deposited in the auxiliary fuel chamber through the upper end thereof and resting upon said supporting means and adapted to displace a predetermined quantity of fuel above the plane of the bottom of the fuel pan.

4. A burner comprising a fuel pan having a fuel inlet at its bottom, a fuel chamber spaced laterally from said fuel pan and having an upper portion above the plane of the bottom of the fuel pan, said chamber having a fuel inlet, a fuel pipe leading from said fuel chamber to the fuel inlet of said fuel pan, an auxiliary fuel chamber above the fuel pipe extending upwardly above the plane of the bottom of the fuel pan, an arm connecting the fuel pipe with an outlet at the bottom of the auxiliary fuel chamber, float controlled means for controlling flow of fuel into the fuel chamber, a valve for controlling flow of fuel from the fuel chamber through the fuel pipe, lugs extending from walls of the auxiliary chamber intermediate upper and lower ends thereof, and a disc deposited in the auxiliary chamber through the upper end thereof and resting upon said lugs and being adapted to displace a predetermined quantity of fuel above the plane of the bottom of the fuel pan.

5. A burner comprising a fuel pan having a fuel inlet at its bottom, a fuel chamber spaced laterally from said fuel pan and having its upper end above the plane of the bottom of the fuel pan, said chamber having a fuel inlet, a fuel pipe leading from said fuel chamber to the fuel inlet of said fuel pan, an auxiliary fuel chamber above the fuel pipe extending upwardly above the plane of the bottom of the fuel pan, an arm connecting the fuel pipe with an outlet at the bottom of the auxiliary fuel chamber, a removable body in the auxiliary fuel chamber for displacing a predetermined quantity of fuel above the plane of the bottom of the fuel pan, a perforated tube extending vertically in the main chamber from the outlet and having a valve seat at its bottom, a valve operating through said tube for controlling flow of fuel through the fuel pipe, and float controlled means for controlling flow of fuel into the fuel chamber.

6. A burner comprising a fuel pan having a fuel inlet at its bottom, a fuel chamber spaced laterally from said fuel pan and having its upper end above the plane of the bottom of the fuel pan, said chamber having a fuel inlet, a fuel pipe leading from said fuel chamber to the fuel inlet of said fuel pan, an auxiliary fuel chamber above the fuel pipe extending upwardly above the plane of the bottom of the fuel pan, an arm connecting the fuel pipe with an outlet at the bottom of the auxiliary fuel chamber, a removable body in the auxiliary fuel chamber for displacing a predetermined quantity of fuel above the plane of the bottom of the fuel pan, a perforated'tube extending vertically in the fuel chamber from the outlet and having a valve seat at its bottom, a valve operating through said tube for controlling flow of fuel through the fuel pipe, a float pivotally mounted in said fuel chamber about said tube, and a valve carried by said float to shut off flow of fuel into the fuel chamber when the float is raised to a predetermined height.

DAVID LUMSDEN.