US1546892A - Oil burner - Google Patents

Description

July 21, 1925. 1,546,892

C. D. HACK OIL BURNER Filed Oct. 6'. 1924 :5 Sheets-Sheet 1 lfiventor Wflawdllml July 21, 1925.-

5 Sheets-Sheet 2 In ven tbr .By flic. D. HACK OIL BURNER Fzled Oct. 6. 1924 Jul 21, 1925.

, 1,546.892 C. D. HACK OIL BURNER Filed Oct. 6, 1924 3 Sheets-Sheet 5 Inventor flaaafimadlul By 9M W Patented July 21, 1925.

UNITED STATES PATENT OFFICE.

crrAnLEs n vin mica, or rename, onTAnIo, CANADA, Assrelvoa To THE HACK GIL Brianna COMPANY, or 'ronon'ro, eANAnA.

OIL BURNER.

Application filed Gctober 6, 1924. Serial No. 741,916.

To cZZ who iii it may concern: v

Be it known that l, Gimmes DAVID HACK, a subject of the King of Great Britain, and resident of the city of Toronto, in the Province of Ontario, in the Dominion of Canada, have invented new and useful Improvements in Oil Burners, of which the following is a specification. The invention relates to improvements in oil burners as described in the present specilication and shown in the accompanying drawings which form part of the same.

The invention has for its primary object the provision of a serviceable and durable oil burning unit for domestic and industrial furnaces. c p

More specifically, the object of the -in vention is to provide mechanical means for automatically cutting off the supply of oil to the burner nozzle coincidently with the stopping of the driving motor; particularly where this is caused through the failure of electric power, in order that should such motor be accidentally rendered inoperative for a period of time sufficient to allow the burner flame to go out, the restarting of the motor will not feed nnignited oil to the furnace. Y

With these principal objects in View subordinateobjects of the invention will appear as its description oroc'eeds;

Referring to t 1e drawings Figure 1 is a side elevation of the oil burner;

Figure 2 is a, rearelevation'of Figure 1. Figure 3 is a longitudinal section of the aforegoing nozzle.

, Figure 1 is a front end vlew of this nozzle; V Figure 5 is a vertical section of an oil pump; j

Figure 6 is a vertical section of a valve chamber. that forms part of the oil cut-off. Figure 7 is a vertical section of a valve nnseating arm, which also forms a part of the oil cut-off; the section being taken on the line 77 of Figure 2. V

Figure 8 isan enlarged fragmentary view of Figure 2 illustrating a governor control for the valve chamber. j V j Like numerals of reference indicate corresponding parts in each figure throughout the drawings.

Referring more particularly to Figures 1 and 2 of the drawings, the invention apperchamber 3 tains to that type of oil burner which in use 1s situated exteriorly of a furnace with its nozzle projecting into the fire-box thereof. The several parts which together compose the burner unit are supported upon a table, as at 1, provided with legs 2 preferably of .an adjustable nature.

In the main, the burner consists of an air rigidly bolted to the table 1 and provided with a tangential out-let 4t which carries a nozzle 5 wherein air and oil are compounded in order to form the combustible mixture. This blower has the usual impeller, as at 6, whose shaft is exteriorly ournailed in a bearing 7 on one side of the blower casing and upon the other side in a further bearing 8 integral with a coaxial pump 9. This pump is directly connected to said impeller shaft in order to effect its simultaneous rotation; while upon the opposite side of the blower said shaft is con nected through a flexible coupling 10 to an electric motor 11 for driving purposes.

Having recounted the general construction of the oil burner to which the present invention relates, attention is directed to the invention itself. Advertingto the oil pump 9, this is provided with a rotor 12 having a hub 13 carried upon the end 1 1 of the aforesaid shaft, which rotor comprises vanes 15 preferably tapering transversely. Oil is admitted through a pipe. 16 to a pas sage 17,.whieh in turn communicates with the pump interior. Upon rotation of the rotor 12 oil is forced by'its vanes 15 through an outlet 18 into a valve controlled piping 19 where it is conducted to the nozzle 5 for atomization with air under pressure from the blower 3.

Superimposed over the pump 9 is the valve chamber 20 with, the pipe 16 projecting therein and surrounded by a stufling box 21 in order to prevent leakage of oil at their juncture (detailed in Figure 6). The top of the chamber is cut away to provide an opening 22 from which rises an annular internally threaded boss 23 of sutfi cient diameter to leave a ledge 24. Resting upon this ledge 24 is a circular valve-seat 25 formed with a central valve face 26 from which depends a guide 27. Slidably contained in said valve seat by means of a. pilot 28 is a valve 29, the lower end of said pilot extending beyond the extremity of the guide 27.

Fitted over and above the valve 29 is a screen 30, which is held in place by screwing on a cap 31, A piping 32 extends from the latter for the purpose of connecting with a non-gravity oil tank, not shown in the drawings as it does not form a feature of the pres ent invention.

Horizontally journalled in the chamber is a shaft having one end protruding laterally therefrom in the direction of and in close proximity to the blower 3. This protruding end is provided with a stuffing-box for purposes of precluding oil leakage. Rigidly secured to the shaft is a finger 35 having its free terminus situated under the pilot 28 of the valve 29, while likewise secured to the suave, attending in a contrary direction to such finger, is an arm 36 having an upwardly bent end 37, which serves as a manual grip portion. 3

urning to the flexible coupling 10, which connc lllO motorll to the blower-impeller 6, a cen rifugal governor 1S intimately associated wit-lithe same and is carried bythe adjacent portion of said shaft. This governor comprises a member 38 integral with the coupling and having the usual fly-balls 39. Operably connected with these fly-balls is a sleeve 40 urged into engagement with the same by a spring 41.

is a lever pivoted midway of its length to the foregoing blower 3 and having one of its ends engaged in a groove of the sleeve 40, the other end being pivotally connected to a rod 43 passing through the blower casing at a point above its impeller 6. The free end of this red presses against one of the arms of a bell-crank 44, which is pivotally carried by the blower in a manner similar to the lever 42. The companion arm of the bell-crank 44 is extended outwardly with its extremity under and in close proximity to the arm 36 of the valve chamber 20 for engagement with the same,

Reverting to the nozzle 5, Figures 3 and 4, this comprises an annular shell structure having the bore of its extremity enlarged for a distance greater than its diameter, as at 45. Pressed into this enlarged portion is a reducing member 46 provided with an inter rupted periphery formed by a series of longitudinally extending slots 47. These slots compose openings around the central reduced bore 43 and communicate at their inner ends with the passageway of the nozzle. The inmost end of the reducing memher is rounded off at 49 to merge into the larger diameter of the nozzle. Situated slightly to the rear of this rounded off portion is the oil nozzle 50 which connects to the piping 19 aforesaid in order to receive oil from the pump 9.

In the use of the invention, when the burner is out of operation the governor is so arranged that the bell-crank 44, through its connections, relieves the weight of the arm 36 and holds it in a raised position, thus allowing the valve 29 to seat itself closing the oil passage and preventing oil from being pumped to the nozzle 50. However, upon operation of the motor 11, the flexible coupling 10 transmits power simultaneously to the impeller 6 of the blower 3 and the rotor 12 of the pump 9. Since the governor is connected to this flexible coupling its flyballs 39 are also actuated forcing the sleeve 40 against the spring 41 overcoming its pressure. The movement of this sleeve shifts the lever 42 withdrawing the rod 43 and allowing the bell-crank 44 to disengage itself from the arm 36. This obstruction removed, the arm to all intents and purposes is free to raise the valve 29 as previously explained; however, it is preferred that there should be sufficient friction in the journals of its shaft 33 to retain it in a raised position until the operator manually lowers it by the grip portion 37. The reason for this is thatshould the motor temporarily stall through lack of electrical current, its resumption of operation upon the power coming on again would not open the valve and permit oil to be fed unignited from the burner nozzle. As the arm 36 is manually lowered the finger 35 unseats the valve 29 which allows the impellers 15 of the pump 9 to draw oil through the piping 32 from the non-gravity storage tank, whence it is delivered through the piping 19 to the oil nozzle 50.

lVhat I claim is 1. In an oil burner, an oil feed line, a valve chamber connected therewith, a valve operably disposed within said chamber, a shaft journalled in such chamber and protruding therefrom, the journals of said shaft offering frictional resistance to its rotation; a finger affixed to the shaft within the chamber and engaging said valve, a member likewise secured to the shaft exteriorly of said chamber, said member projecting from the shaft on the opposite side to that of said finger and being of a much greater weight than the same but not sufficient to overcome the frictional resistance of the aforesaid shaft; a governor, and mechanism connecting said governor to said member whereby said member is raised concurrently with the stopping of the burner mechanism for the purpose of permitting the valve to seat itself.

2. In an oil burner, an oil feed line, a valve chamber connected therewith, a valve operably disposed within said chamber, a shaft journalled in such chamber and protruding therefrom, the journals of said shaft offering frictional resistance to its rotation; a finger affixed to said shaft within the chamber engaging said valve, an arm projecting from the shaft on the opposite side to that of the finger and being of a much greater Weight than the same but not sufficient to overcome the frictional resistance of the aforesaid shaft, abell-crank having one of itsmembers engaging said arm, a governor, and means operably connecting the other member of said bell-crank to said governor for the purpose of raising the aforesaid arm concurrently with the inoperation of the burner mechanism in order to permit the valve to seat itself.

3. In an oil burner, an oil feed line, a valve chamber connected therewith, a valve operably disposed within said chamber, a shaft journalled in such chamber and protruding therefrom, the journals of said shaft offering frictional resistance to its rotation; a finger affixed to said shaft within the chamber engaging said valve, an arm projecting from the shaft on the opposite side to that ofthe finger and being of a much greater Weight than the same but not sufficient to overcome the frictional resistance of the aforesaid shaft, a bell-crank having one of its members engaging said arm, a rod operably associated with the other member thereof, a governor, and means operably connecting said rod to said governor for the purpose of raising the aforesaid arm concurrently with the inopcration of the burner mechanism in order to permit the valve to seat itself.

4. In an oil burner, an oil feed line, a valve chamber connected therewith, a valve operably disposed within said chamber, a

shaft ournalled in such chamber and pro truding therefrom, the journals of said shaft offering frictional resistance toits rotation, a finger affixed to the shaft within the chamber and engaging said valve, an

arm also secured to the shaft exteriorly of said chamber, such arm projecting from the shaft on the opposite side to that of the finger and being of a much greater weight than the same but not sufficient to overcome the frictional resistance of the aforesaid shaft, a governor, and mechanism connecting said governor to the arm whereby it is raised concurrently with the stopping of the burner mechanism for the purpose of permitting the valve to vseat itself.

5. In an oil burner, an oil feed line, a valve chamber connected therewith, a valve operably disposed within said chamber, a shaft journalled in such chamber and protruding therefrom, the journals of said shaftoifering frictional resistance to its rotation, a finger aflixed to the shaft within the chamber and engaging said valve, an arm also secured to the shaft exteriorly of said chamber, such arm projecting from the shaft on the opposite side to that of the finger and being of a much greater weight than the same but not sufiicient to overcome the frictional resistance of the aforesaid shaft, a bell crank having one of its members engaging the arm, a rod operably asso ciated with the other member thereof, a lever pivoted to said rod, and a governor operably connected to the lever for the purpose of raising the aforesaid arm concurrently with the inoperation of the burner mechanism in order to permit the aforesaid valve to seat itself.

Signed this 22nd day of September, 1924-, at Toronto, Ontario, Canada.

CHARLES DAVID HACK.

Witnesses WV. I-IUMPHREY MARSDEN, F. C. BROMLEY.

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