US1888060A - Electrically operated and controlled oil burning mechanism - Google Patents

Description

Nov. 15, 1932. w. w. WILLIAMS 8 ELECTRICALLY OPERATED AND CONTROLLED Oil; BURNING IECHANISI 3 Sheets-Sheet 1 I Origixgal Filed June 11. 1928 INVENTOR Wfll. TER M WILL lflMS A'ITORNEY Nov,'15, 1932. w. w. WILLIAMS ELECTRICALLY OPERATED AND CONTROLLED OIL BURNING MECHANISM Original Filed June 11. 1928 3 Sheets-Sheet ATTORNEY Nov. 15, 1932; w w, w s 1,888,060

ELECTRICALLY OPERATED AND CONTROLLED OIL BURNING MECHANISM INVENTOR WAL TEA m W/LL/fl/VS ATTORN EY Patented Nov. 15, 1932 UNITED STATESPATENT OFFICE WALTER W. 'W'ILLIAMS, OF BLOOMINGTON, ILLINOIS, ASSIGNOB TO WILLIAMS OIL-O- MATIC HEATING CORPORATION, OF BLOOMINGTON, ILLINOIS, A CORPORATION 01' ILLINOIS BLECTRICALLY OPERATED AND CONTROLLED OIL BURNING MECHANISM Original application filed June 11, 1928, Serial No. 284,545, now Patent No. 1,817,051, dated August 4.

1931. Divided and this application filed June 24, 1981. Serial No. 546,537.

This invention relates to improvements in liquid fuel burners for domestic heating pur poses and more particularly to an electrically operated and controlled oil burning mechanlsm, and is a division of applicants copending application, Serial No. 284,545, filed June 11, 1928, which matured into Patent No.

, 1,817,051, August 4, 1931.

It is an object of this invention to provide a device of this character which is of substantial yet simple construction and adapted to modern production methods with the various parts interchangeable and readily adjustable.

With these and other objects in View refer- 5 ence is made to the accompanying drawings which illustrate a preferred form of this invention with the-understanding that minor detail changes may be made without departing from the scope thereof.

In the drawings:

' Figure 1 is a view in side elevation of this improved device, as installed in connection with a commercial type of'domestic furnace, with parts broken away, and illustrating the electrical controls in diagram.

Figure 2 is an enlarged fragmentary detail view in front elevation, of Figure 1, with parts broken away, and partly in section.

Figure 3 is a top plan view of the control so mechanism of Figure 2 with the cap removed.

Figure 4 is a. view in central vertical longitudinal section taken on the line 44, Figure 2, looking in the direction of the arrows.

Figure 5 is an enlarged detail plan view of dash pot intake trap, with needle valve cap removed.

Figure 1 of the drawings shows an embodiment of this improved electrically-operated and controlled oil burner mechanism as installed in connection with a domestic heater or furnace of any desired type. The oil burner is illustrated in side elevation and comprises an electric motor 1 mounted within the casin resting andsecuredupon the support 2 having adjustable legs 3, the motor shgft- 4 extending to the right of the motor casing through a fan blower housing 5 to an oil pump 6. A fan blower, not shown, is mounted upon the motor shaft within the 1 housing and the fanblower housing opens into a draft pipe 7 which extends along one slde of the burner mechanism and enters the combustion chamber '8 of the commercial heater or furnace 9. The motor shaft is exended to the left to pass through an atomiz- 1ng pump housing 10 and metering pump housing 11 and is adapted to operate simul taneously the oil pump 6, the fan blower .with?n the housing 5, the atomizing pump within the housing 10, and the metering e0 pump within the housing 11.

Oil, or other desirable liquid fuel, is drawn from a tank, not shown, through the pipe 12 by the oil pump 6 from which it is delivered by the way of pipe 13 to an oil'strainer housing 14 having an overflow pipe 15 by which excess oil isreturned to the tank.

The oil strainer housing is shown in end elevation and in' section in Figures 2. and'4, respectively. The oil supply pipe 13 is shown in Figure 2 as entering the upper lefthand side of the housing and the overflow pipe 15 is shown leaving the upper right hand side of the housing.

Figure 4 shows an oil strainer in the form of a fine wire mesh cylinder 16 carried upon a centrally perforated plate-17 held seated upon a shoulder within the housing below the opening of the supply pipe 13. The bottom of the housing is provided with an outlet orifice 18'opening into an oil valve chamber 19, whereby it is seen that all oil entering theoil valve chamber 'must first ass through the cylindrical strainer 16 and i excess oil is supplied to the oil strainer housing it will pass out therefrom through the overflow pipe 15 back to the tank.

The oil valve and oil valve chamber 19 are arranged within a housing 20 which also forms a partof the metering pump housing 11 and the oil valve chamber 19 is provided with a passage 21 leading from the upper portion thereof to the upper portion of the interior of the metering pump housing 11. The oil valve chamber supports an oil valve 22 normally held seated in its uppermost position by a spring 23 and is caused to open upon the depression of a rod 24 mounted thereabove in the housing 20. As shown in Figure 4, the rod 24 is provided with a 'bel- 100 lows stufling box 25 attached at its upper end to a plate 26 over the well 27, in which the rod operates, by a cap 28 which also acts as a bearing or guide for the upper end of the rod. When the rod is depressed by the fuel pressure, as hereinafter described, it depresses the oil valve 22 allowing the oil fiowing from the oil strainer housing through the conduit 18 and valve chamber 19 to enter conduit 21 and be discharged within the metering pump housing 11 As shown in Figure 1, this oil valve and metering pump housing 20 is secured to the atomizing pump housing and the atomizing pump housing is secured in turn to the end bell 29 of the motor casing 1 by means oftie rods 30.

The metering pump comprises a cylindrical base 31 which-is held in place between the metering ump housing 11 and the atomizing pump ousing 10 by the said tie rods 30.

The metering pump housing provides a cy-- lindrical chamber 32 which is concentric with the extension 4 of the motor shaft 4, which shaft passes through the center of the metering pump base 31 and is operatively attached to a rotor 33 adapted to rotate freely within the chamber 32 and bear on one side against a, projection of similar size and shape 34 extending toward the center of the chamber from the fixed base 31. The

oil or liquid fuel entering from conduit 21 into the metering pump chamber 32 is delivered at a constant rate of supply to the interior of the atomizin pump housing 10 irrespective of the quality of the fuel. The atomizing pump housing 10 is a cylindrical casing abutting the fixed metering pump base 31 and end bell 29 of the motor .casing 1, which cylindrical casing is arranged eccentric to the motor shaft 4, and a c lindrical rotor 35 is axially mounted upon t e motor shaft 4 to closely approach the interior walls of the atomizing chamber within the housing 10 at the lower side thereof, and said rotor is provided with a plurality of blades 36 slidably mounted within uides in the rotor 35 withtheir outer ends a apted to contact with and wipe over the entire inner surface of the atomizing pump cylinder as the-rotor rotates.

The end bell 29 is secured to the motor casing l in fixed relation by any desired means. As heretofore stated the tierods 30 secure the oilvalve and metering pump housa duct in the end bell which is also in com- 'munication with a discharge pipe 41 to convey the atomized mixture of oil and air under pressure from the atomizingpump through the draft pipe 7 to the burner nozzle 42, as shown in Figure 1. Pressure is also conveyed by a pipe 39 from' the atomizing pump to the under side of a dash pot bellows housing 40.

The dash pot bellows housing is in the form of a cylindrical casing open at the top and is formed integral with the cap 28 secured upon the oil valve and metering pump housing 20 over the well 27. A metallic bellows 43 closed at the bottom andsecured to an outwardly extending plate 44 is arranged within this housing with the plate 44 clamped about the upper edges of the housing by a closure 45 havin a central opening with a depending cy lrical hearing 46, which closure also acts as a-base or support for the control mechanism. A plunger 47 having an enlarged head in the lower end thereof is mounted in the central bearing 46 with the lower enlarged head resting upon the bottom of the bellows 43. and normally held in contact therewith bya compression spring 48 arranged about the plunger and bearing between the underside of the closure and upper side of the enlarged head. A stufling box comprising a metallic bellows 49 is arranged about said lunger 47 and bearing 46, which bellows is closed at the lpwer end and is interposed between the outer bellows 43 and undersideof the enlarged head of .the plunger47 with the opposite end secured to an outstanding plate held in airtight position to the underside of the closure 45 by clamping member 50- It is, therefore, readily seen that when pressure created by the atomizing pump is conducted therefrom through pipe 39 to the underside of the bellows 43, the bellows 43 will. be caused to contract, thereby imparting an upward movement to the plunger 47. The n ward movement of the plunger 47 is emp oyd to operate the oil valve lunger 24 and also the ignition switch, as hereinafter described, and it is desirable to impart a slow upward movement to said plunger 47 and allow it to have a quick return to its lowermost position. When the bellows 43 is caused to contract, the air contained between the inner walls of this bellows 43 and the outer walls of the bellows 49 must be allowed to escape to the atmosphere and by regulating the rate of escapement the upward movement of the plunger 47 can also be regulated. To this end a chamber 51 is provided integral with andextending above 1,aaa,oeo

the upper side of the closure 45 which chamwith themovable end of the bellows, and

her is referabl provided with a depressed conica bottom aving a small duct 52 leading from the apex thereof to the atmosphere and also a vertical duct 53 leadin from the sloping surface thereof as shown in Figure 5 to the interior of the dash pot bellows housing between the bellows. 43 and 49, as

shown in Figure 4. A cap 54 is secured above the chamber 51, as shown in Figure 4, which cap contains a central vertical (passage 55 h'avin a right angularly exten ing duct 56 exten ing therefrom and leading to the atmosphere with a bearing surface formed about the passageway 55 below the lower juncture of said duct, and a needle valve 57 is mounted in the cap 54 adapted to adjustably control the size of the opening between the passage 55 and duct 56. A check valve, preferably in the form ot a ball 58, is provided upon the bottom of the chamber 51 which normally closes the duct 52. By the proper adjustment of the needle.

valve 57, the time required to contract the bellows 43 from its position resting upon the bottom of the housing 40 until the enlarged head of the plunger 47 engages the bottom of the bearing 46 can be accurately timed and when the pressure about the exterior of the bellows 43 is relieved, the spring 48 will expand it causing a suction through duct 53 to chamber 51 allowing lthe atmospheric pressure entering duct 52 to pass about the check valve 58 and, by this construction,an adjustable dashpot is provided controlling the time of movement of the plunger 47.

As heretofore said, the oil valve 22 is normally closed and is opened by a downward movement of the rod 24. The upward movement of the plunger 47 actuated by the bellows 43 is imparted to alever 59 pivotally mounted at 60 in line with the upper extrem ity of the rod 24, which lever 59 extends beyond its pivot andis provided with a downwardly extending adjustable contact 61 adapted to engage a ball 62 supported in the upper end of the rod 24 whereby upward. movement of the plunger 47 causes ,a de-.

pression. of the rod 24 to o n'the oil valve 22 and when ressure wi W the houslng 40 is relieved, t e de ression of the plunger 47 by the spring 48 a owe the upward tens: on of the spring 23 to return the rod 24 and lever 59 therewith.

from the ressure s1 What I claim is:

1. In a fluid umping apparatus, a fluid "Pu p, a norm a closed housing,

regulated means to allow the escape of air from theinterior of the bellows. upon compres'sion' to time the opening of the fluid intake valve.

2. In a fluid pumping apparatus, a fluid pump, a normally closed fluid intake valve,

a closed housing, a bellows having one end closed by the housing closure, a connection from the pressure side of the pump to the interior of the housing, and means actuated by the compression of. the bellows to open the fluid intake valve including a plunger I -means for normally expanding the bellows to close the fluid intake valve upon cessation ofpump pressure, and means admitting air to the interior of the expanding bellows independent of said regulating air escape WALTER w. WILLIAMS.

means.

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