US2087011A - Electrically operated fluid fuel burner - Google Patents

Description

July 13, 1937. w; w. WILLIAMS ET AL 2,087,011

` ELECTRICALLY OPERATED FLUID FUEL BURNER Filed Deo. 27, 1932 2 Sheets-sheet 1 A TTORNEYS.

' July 13, 1937. l. w. 4vvlLLJM/ls ET AL 2,087,011

ELECTRICALLY OPERATED FLUID FUEL BURNER is made to the accompanying sheets of drawings Patented 11119113, i `1937 UNITI-:D ,s-TATES l j f 2,087,011

PATENT opi-Fics A ELECTRICALLY OPERATED FLUID FUEL l BURNER r r Walter W. Williams, Philip A.' Celander, and Oliver Earl Nesmith, Bloomington, Ill.; said Ce-` lander and saidNesmith assignors to Williams i Oil-O-Matic Heating Corporation, Blooming-` ton, Ill., a corporation of Illinois I Application` December 27,1932, Serial No. 648,966

` 4 Claims.` (01.137-153) which illustrate a preferred form of this invention` with the understanding that 'minor detail changesfmay be made therein without departing 15 from the scope thereof.

In the drawings; r

Figure 1 isa view in side elevation of a commercial type of domestic uid fuel burner with parts broken away, illustrating the armufller in section and a portion of the oil valve casing in section. f

Figure 2 is a View in rear elevation of the fluid fuel burner shown in Figures 1` and 2 with a por` tion1 of the fan housing in Vsection and the oil valve casing,` metering pump, and a portion of the pressure pump shown in section. i i

Figure 3 is an enlarged detail View in the central vertical sectionof the fluid fuelcontrol valve showing'the same in closed position.

Figure 4 is a view similarto Figure ZiV showing the valve in open position. ,l The embodiment of thisinvention is illustrated in connection with acommercial type of fluid fuel burning` mechanism for domestic heating purposes of the same general type as illustrated in Vthis applicant Williams `prior patent, No. 1,817,051, granted August 4, 1931, upon electrically operated and controlled oil burningmechanism, andincludes a base I supported on legs 2 having resilient feet 3', the toesof which mount one end of a leaf spring 4 `which is bentV back upon itself withthe lower free end secured toa pad 5 centrally located thereon by'securing means such as shown `in Figures-'1 and;2 Thefeet are adjustably secured to the legs 2 by the set screws 6. r

`Inthis manner the weight of the burner mech- 'anism upon the base Iis equally distributed upon the three legs, the outstanding feet carrying the three-point support beyond the confines of the basefand increasing the distancesof the weight- -supporting Padsi from each lother'l .With the adjustable resilient feet the relation of the burner mechanism to the domestic heater is readily adoperation of thev motor and workingparts of the mechanism is readily absorbed. Y .x

The base I supports an integral fan blower casing or housing 'I having an extension 8 for receiving and mounting the electric motor Si. The

far side of the motor is provided with a cover orr an end bell I secured tothe casing 8. Y The motor is providedwitha driving shaft I`I`for'operating an oil pump I 2 and also operatinga fan blowerV I3. The driving shaft II is extended through the end bell I0` on the opposite side of the motor for operating a compression pump I4 and metering `pump I mounted uponthe end bell. The general construction and operation of the pressure `pump and metering pump is of the` type disclosed in this applicant Williams" prior patent, No. 1,451,793, granted April `17, `1923;

Figure 2 illustratesfan intake pipe I6 leading from a source of liquid fuel supply to the oil pump I2. Figure 1 illustrates an oil pipe I1 lead#- ing from the discharge side of the oilpump I2 to an intake I8 ofanroil valve casing I9 through which the `fluid fuel passes when the Vmotor is operatingto the intake side of the metering pump. r [Mounted upon the base I and extending from the fan housing 'l `a draft pipe 20 ,is provided. Fuel is delivered through a pipe centrally mount- `ed within the draft pipe and terminating in a nozzle adjacent the open end `of the draft pipe 20 and continuing in the opposite direction through the lower part of the housing and communicating with a float chamber 23 `which in turn communicates by the pipe 24 withthe pressure pump Il. This construction in general is disclosed in this applicantWilliams" prior patent, No. 1,831,277, granted November 10, 1931, upon a fluid. fuel burner construction. r I

y The pressure pump 'Ildraws atmospheric` air into the pump chamber through an air mufiler, including a casing 24a mounted on the casing upon the pressure pump III, as shown in Figure 1. The'casing 24F is preferably cylindrical in shape with an annular passage-way 2,5 aboutaconcentric baille 26. p The casing 2lia is provided with a similar shaped cover 21 and a corresponding annular passage-way and corresponding cylindrical baille. A flexible diaphragm 281sv posi-` tioned between thecontacting surfaces of the casing 24a and cover 21, which `cover is drawn tightly upon the casing by a plurality of screws 29. This diaphragm ispreierably made ,of a treated heavy flexible paper, such las that commercially known as Karrapak, The cover 21 is provided with a central opening 30, which supports an air intake tube 3l, which passes through Cil lol

the diaphragm 28 and opens into the casing within the cylindrical baille 26. The diaphragm is provided with a plurality of apertures 32, which allow the air drawn through the tube 3| to pass from the chamber within the baffle 26 through the diaphragm into the corresponding chamber in the cap. The wall of the cylindrical baille of the cap is provided with one or more apertures 33, opening into the annular passage-way in the cap and the diaphragm is provided with a plurality of apertures 34, forming a means of communication between the annular passage-ways in the cap and casing. The annular passageway in the casing is provided with a passageway leading to the intake 36 of the pressure pump, which passage-way is preferably provided with a ball check valve 31. v

As hereinbefore described, the fluid fuel or oil is forced by the oil pump I2, when the motor is operating, through the pipe I1 to the intake I8 of the oil valve casing I9. This oil valve casing is preferably in two parts, of which the lower part I9a is formed integral with the outer casing 39 surrounding the metering pump I5, as shown in Figures 1 and 2. The lower casing I9a provides a cylindrical chamber 39, which communicates by the passage-way 40, leading from the bottom thereof through the casing of the pressurpump I4, to the discharge port 4I of the pressure pump, whereby when the pressure is created within the pump, a part of it is transmitted to the chamber 39. A metallic bellows 42, closed at the bottom by the circular plate 43, is mounted upon a metallic annular diaphragm 44, held in place over the chamber 39 by the cap or upper portion of the oil valve casing I 9, which is secured to the lower casing by screw threaded bolts 45, as s shown in Figures 1 and 2. The upper portion I9 includes chamber 45, into which the oil intake I8 opens, and which is closed at the bottom by the partition 46. The partition mounts an oil valve seat 41 which is concentric with and depends below the annular diaphragm 44, the seat entering within the metallic bellows 42 and being preferably held in place upon the partition 44I by the screw threaded nut 48. A valve head 49 is normally held seated upon the upper portion of the valve seat 41 by the coil spring 50 surrounding the head 49 and engaging the upper closure or cover I9b of the casing I9. The valve seat is provided with a cylindrical chamber 5I, which opens at the lower end through a plurality of apertures 52 into a passage-way 53 leading through the bottom partition 46 and registering with a similar passage-way 54 in the bottom portion I9, which communicates with the metering pump I5, a registering aperture being provided in the diaphragm 44 to provide an unobstructed passage-way from the chamber 45a through the valve seat 41 and passage- ways 53 and 54 to the metering pump. The valve head 49 is provided with a central depending fluted guide 55, which is received within the chamber 5I' of the valve seat and is terminated short of the bottom of the chamber 5I when the head 49 is seated upon the valve seat 41, as shown in the enlarged detailed view Figure 3. The depending screw threaded portion 5B of the valve seat 41 which enters within the bellows 42 mounts a reciprocating valve stem 51 with its lower end resting upon the lower closure of an additional metallic bellows 5B, the upper end of which is sealed to the under side of the nut 48. From the above description, it is seen that when the motor is idle no pressure is created within the chamber 39 and the bellows 42 will assume its normal extended position with the valve head 49 seated upon the valve seat 41, thereby closing the communication from the oil pump I2 to the metering pump I5, as shown particularly in Figure 3. When the motor operates the pressure pump, the pressure will be transmitted through the passage-way to the chamber 39, causing the bellows 42 to contract, whereupon the valve stern 51 will engage the guide 55 and move the valve head 49 away from the valve seat 41, as shown in the detailed view Figure 4, so that oil within the chamber under pressure of the pump I2 will pass between the lluted portion of the guide in the valve seat and through the apertures 52 and passageways 53 and 54 into the metering pump I5 as long as the motor is in operation. As soon as the motor stops, the pressure in the casing 44 subsides and the bellows 42 will expand and allow the spring 50 to close the oil valve to the metering pump. In order that the bellows 42 may be caused to contract and expand, a passage-way 59 to the atmosphere is provided in the wall of the upper valve casing I9 and between the partition 46 and annular gasket 44 to the interior of the bellows 42. The additional bellows 58 provides an oil seal for the valve stern 51. In the event that the oil pump I2 supplies oil at a greater rate or higher pressure than can be accornmodated by the metering pump, a return pipe to the source of oil supply is connected through the pressure valve 6I, of commercial form, with the interior of the chamber within the upper valve casing I9, to form a' by-pass, as is customary in such cases.

In the oil valve above described, the spring 50 normally holds the valve seated. When the motor is idle, as the aperture 59 is communicating with the interior of the bellows 42, the bellows is allowed to expand, As soon as the motor begins to operate, `the oil pump I2 delivers oil to the interior of the chamber 45 and atthe same time the operation of the pressure pump I4 transmits pressure through the duct 40 to the interior of the chamber 39 and, as the pressure increases, the bellows is compressed, thereby transmitting a direct lifting power through the valve stem 51, which directly lifts the valve head 49 from its seat 41, allowing the oil to flow there-through into the metering pump casing. I

This construction, by providing a direct connection from the interior of the chamber 39 to the interior of the pressure pump through the casing of the pump and chamber, prevents any escape of pressure and is, therefore, more positive in its action. Likewise the pressure Within the chamber 39 acts directly and in a straight line to unseat the head 49 of the valve.

When the motor is operating, air is drawn in through the muiiler and intake to the pressure pump I4 and at the same time oil is metered into the intake of the pressure pump through the metering pump I5 and both air and oil under pressure are delivered from the pressure pump through the pipe 24 to the float valve casing 23, as shown in Figures 1 and 2.

What we claim is:

1. A valve including a cylindrical valve cash ing divided into two horizontal chambers, an inlet in the wall of the upper chamber, a valve seat mounted axially upon the dividing Wall, an outlet in the dividing wall in connection with the upper chamber through said valve seat, a valve head in the upper chamber normally seating upon said valve seat, a valve actuator within said lower chamber responsive to `pressure conditions `in said lower chamber tounseat the `valvelhead upon an increase above a predetermined pressure andto seat the valve head upon a reduction of `said predetermined degree,

pressure `below wherein said valve seat includes a sleeve depend- "ing therefrom mountedin thedivision wall and l dependingtherefrom to enter the actuator, and

,e wherein avalve stemis mounted to reciprocate within said sleeve operated vby the actuator, and wherein one closed end of ,a bellows member is secured about the depending portion of thesaid ,e ing divided into `two` horizontalchanibers, an 1* inlet in the Wall of the upper chamber, a valve seat mounted axially upon the dividing wail, an 4 `outlet in the dividing wall in connection with the upper chamber through said valveseat, avalve sleeveand with the bottom lof the valve stem contacting the interior of the other closed end of the bellows, tuator.` n v l '2. A valve including a cylindrical `valve case head in the upper chamber` normally seating l jupon said valve seat, avalve actuator within said lower chamber responsive to pressure conditions e, `insaid lower chamber to unseat the'valve head upon `an increase above a predetermined pressure and to` seat the valve head upon a reduction of pressure below said predetermined degree,

wherein said actuator includes a bellows mem` ber concentric to said casing provided with a rigid bottom `closure and with the upper walls secured to an annular diaphragm secured to the casing wallsaid wall `provided with an aperture communicating from the interior of the to the atmosphere. l

3. A valve including `a cylindrical valve casi` ingdivided into two horizontal chambers, an inlet` inthe wall ofthe upper chamber, avalve seatmounted axiallyupon the dividing wall, an

if outlet in thedividingwall in connection with the upper chamber through said valve seat, a

valve head in the upper chamber normally seating uponsaid valve seat, a valveactuator within said lower chamber responsive to pressure conditionsin said lower chamber to unseat the valve head upon an increase above a predetermined said bellows `enclosed by said acbellows l pressure and to seatthe valve head upon a reduction of pressure below said predetermined degree, wherein said actuator includes a bellows member concentric to said casing provided with a rigid bottom closure and with the upper walls secured to an annular diaphragm secured to the casing waILsaid wall provided with an aperture communicating from the interior ofthe bellows to the atmosphere, and wherein said valve seat includes a` sleeve depending therefrom mounted in the division wall and depending therefrom to enter `the actuator, and wherein a valve stem is mounted to reciprocate within said sleeve operated by the actuator. l

4. A valve including a cylindrical valve casing divided into two horizontal chambers, an inlet in the wall of the upper chamber, a. valve seat mounted axially upon the dividing wall, an outlet in the dividing wall in vconnection with the .upper chamber through said valve seat, a

valve head inthe upper chamber normally seat`- to reciprocate within said sleeve ,operated by the actuator, and wherein one closed end of a bellows member is secured about the depending portion of the said sleeve with thebottom of the valve stem contacting the interior of the other closed end' of the bellows, said bellows enclosed by said actuator, and wherein said actuator in- Y cludes a bellows member concentric to said casingprovided with arigid Vbottom closure and with the upper walls secured to an annular diaphragm secured to the' casing wall, said wall provided with an aperturecommunicating `from the interior of the bellows to the atmosphere.

` WALTER W. WILLIAMS.

PHILIP rACELANDER.. OLIVER EARL NESMTIH.

Images