US3073583A

US3073583A - Heater

Info

Publication number: US3073583A
Application number: US65802A
Authority: US
Inventors: Jr Charles E Woollen
Original assignee: John Wood Co
Current assignee: John Wood Co
Priority date: 1960-10-28
Filing date: 1960-10-28
Publication date: 1963-01-15
Anticipated expiration: 1980-01-15

Description

Jan. 15, 1963 C. E. WOOLLEN, JR

ATTORNEY Jan- 15, 1963 c. E. wooLLEN, JR 3,073,583

HEATER Filed Oct. 28, 1960 2 Sheets-Sheet 2 FIG. 2

INVENTOR HARLES E. WOOLLEN, JR.

ATTORNEY 3,073,583 Patented dan. 15, 1963 3,073,583 HEATER Charles E. Woollen, Jr., Devon, Pa., assigner to .lohn Wood Company, New York, N Y., a corporation of Delaware Filed Oct. 28, 1960, Ser. No. 65,802 Li Claims. (Cl. 263-19) My `invention relates to a construction heater which is particularly adaptable for use in providing heat during cold weather to buildings, etc., during the course of their construction where the permanent heating facilities either have not been installed or are not in operation. .My improved construction heater may also be used to heat other structures which either have no heating facilities, or have inadequate heating facilities.

One object of my invention is to provide a construction heater wherein the combustion is completely burned with no smoke or odor and the possibility of incomplete combustion prevented.

Another object of my invention is to provide a Aconstruction heater wherein any flame tip from the burner is prevented from being discharged from the outlet of 4the heater.

Another object of my invention is to provide a construction lheater wherein the generation of sparks is deterred by reason of longer travel of the combustion gas before reaching lthe outlet of the heater, and which assures that all sparks are quenched before the combustion gas reaches the heated air outlet.

My yinvention may be more fully understood and further objects and advantages may become apparent when reference is made to the .more detailed description of the invention with respect to the accompanying drawings.

In said drawings; FIG. l is a side elevation, partly in section, of a construction heater embodying my invention.

FIG. 2 is an end elevation, partly in section, of the structure shown in FIG. l.

Referring to said drawings; the supply tank 1 for the supply of fuel for the burner is rigidly mounted at its rearward end on a U-shaped supporting bracket 2. The axle means 3 are rigidly connected to the opposite upright arms 4 of the bracket 2. Wheels 5 are rotatably mounted on the axles 3. For convenience, the axle 3 may be of bolt form rigidly secured to the upright portions d ofl the supporting bracket 2 by means of nuts 6.

The forward end of the supply tank 1 is provided with a U-shaped supporting bracket 9, the opposite upright arms thereof being integrally connected to the tank 1 by any convenient means, such as by welding.

The supporting bracket 9 is of such heighth that when the bottom portion thereof is in engagement with a door, the tank 1 will be substantially in a horizontal position with the rearward end supported by wheels 5 and the forward end supported by `the bracket 9.

Each end of the construction is provided with handle means 1d, conveniently formed of bent pipe or tubing, and each handle means is provided with a cross member portion 12. When it is desired to move the construction heater, the Workmen will push down on the rearward cross member 12 of ythe handle means 10, or lift up the forward cross member 12 of its handle means 10, to lift the forward supporting bracket 9 from contact with the door. The construction heater may be facilely moved on the wheels 5 in counterbalanced position on the axles 3 Ito any ldesired location, and then permitted to rest securely on the Ifloor by permitting the forward supporting bracket 9 to come in contact therewith.

The construction heater per se, indicated generally by the reference mark 15, includes an outer shell 16 which is rigidly mounted on the tank 1 by brackets 1'7 rigidly secured at their opposite ends to the tank 1 and to the outer shell 16. The outer shell 16 is provided at its rearward end with an end closure 20 rigidly connected to the outer shell 16 by any convenient means, such as a series of bolts 21 extending through the flange of said end closure 20 and the shell 16 as indicated in FIG. l. The forward end of said heater 15 is provided with a truncated cone portion '22, conveniently rig-idly connected by welding to the forward end of the outer shell 16. The truncated portion 22 has a heated air outlet opening 23.

The firing tube assembly includes the member 25 open at its forward end to the interior of the outer housing 16. The rearward end 26 conveniently is in the form of a truncated cone and provided with a series of air openings 27 from the interior of the outerA housing 16 to the combustion chamber 28 formed by the said ltruncated member 26.

An open end inner shell member 30' is rigidly connected at its rearward peripheral end lto the member 25 of the member 25. The rearward open end of the inner shell 3ft is substantially concentric with the opening 31 formed in the member 25. The open end shell 30 is surrounded lby an intermediate shell member 35 which is rigidly supported on the shell 3d by means of brackets 36. The forward end of said intermediate shell 35 is provided with an end closure 37 which is secured to the outer end of the shell 35 by any convenient means, such as by welding.

The supply tank 1 is provided at its upper portion with a lill opening having a cap 40. The tank 1 is also provided with a drain opening plug 41 at the lower portion of the tank, as shown in FIG. 2.

An oil burner 45 having a nozzle tip 46 is positioned substantially axially in the truncated cone member 26. The burner 45 is connected by suitable piping means 46 to the outlet of the fuel pump 47. The inlet to the fuel pump 47 is connected by piping means 48 to the lter strainer 5d. The inlet to the strainer 50 is connected by suitable piping means to the tube 51, the open distal end of which is positioned near the bottom of the fuel tank 1.

The fan blower 52 is provided with a flange portion 53 by which the blower 52 is rigidly secured by a series of bolts 54 to the end closure 20 of the outer housing 16. The flange 53 is provided with an opening 56 which coincides with a similar opening in the end closure 26, `to permit open communication from the outlet side of the fan 52 to the rearward end of the outer shell 16 and to the combustion chamber 2S through the series of openings 27 formed in the truncated cone member 26. I nd it convenient to provide the member 25 with a deilecting member 57 to prevent the direct flow of air from the outlet 56 of the blower to the heater outlet 23 at the forward end thereof. The blower 52 is connected to .the shaft of the motor I6d. l also find it convenient to connect the shaft of the motor 60 by means of a flexible coupling member 61 to the fuel pump 47.

The junction box 65 is connected by suitable wiring means 66 to a suitable source of electric supply. An electric igniter member 67 is positioned in the ordinary manner in proximity to the tip 46 of the oil burner. The igniter element 67 is connected by suitable wiring 68 to the transformer 70 which is connected, conveniently, within the junction box 65 yto the electrical source of supply.

A switch means is located in the junction box 65, the switch means 75 controlling the electrical circuits to the transformer 7l! to which the igniter element 67 is connected by suitable wiring, and to the motor 6ft operatively connected to the blower 52 and the fuel pump 47. The switch means 75, conveniently, may be of any of the well-known types in which the switch will open after a predetermined interval in the event the burner fails to operate in its normal manner. The electrical circuit to the igniter element 67 is adapted to be opened after a predetermined interval after it is closed by the inclusion of any of the Well-known cyclic control devices in the circuit.

Operation My construction heater may be moved readily to any desired location by the operator pushing downwardly on the cross member 12 of the rearward handle memher lt), or lifting upward on the cross member 12 of the forward handle means 1G, to position the construction heater in counterbalanced position on the wheels 5, so that the heater may be moved facilely. When moved to the desired location, the construction heater is lowered so that the supporting bracket 9 will come into contact with the floor, and the construction heater will remain stationary in the desired location supported on the bracket 9 and the wheels 5.

When it is desired to place the construction heater in operation; the switch 75 is moved to closed position, thereby closing the circuit to the motor 60 operating the fan 52 and the fuel pump 47. Closure of the switch 75 also closes the electrical circuit of the transformer 70. Operation of the `fuel pump 47 withdraws fuel oil from the supply tank 1 through the piping tothe strainer member t) and then to the fuel pump 47, -from the outlet side of which it is delivered under the desired pressure through the piping to the nozzle tip 46 of the oil burner element 45. The circuit to the electric igniter 67 being closed, an electric spark of sufiicient intensity from the igniter 67 will ignite the atomized fuel flowing through the nozzle tip 46.

The blower 52 being in operation, air under the desired pressure tiows through the blower outlet 56 to the chamber surrounding the truncated end 26 of the closure 25, and through the openings 27 into the combustion chamber 2S. The detlecting means 57 will assure that the air from the blower 52 is not forced directly toward the open air outlet 23 of the forward end 22 of the outer shell 16.

Assuming that the igniter 67 has ignited the atomized oil tiowing through the nozzle tip 46, a flame is projected toward the left in FIG. l, and the heated products of combustion move from the combustion chamber 28 through the opening 31 into the inner shell member 30. The air heated by the products of combustion will heat the inner shell 30, and will impinge against the end closure 37 of the intermediate shell member 35, thereby causing the direction of travel to be reversed to through the circular space between the cylindrical shell 30 and the intermediate shell 35, in the direction of the arrows shown in FIG. l. When the heated air tiow reaches the open end of the shell 35, the heated air ow will impinge against the enclosure 25' of the cylindrical member 25.

When the heated air impinges against the closure member 25 of the member 25, the heated air again reverses its direction of tiow, to the left in FIG. 1 through open space between the intermediate shell member 35 and the outer shell 16, as indicated by the arrows in FIG. 1. When the products of combustion heated air reverses its direction of flow through the open space between the intermediate shell member 35 and the outer shell 16, it is mixed with atmospheric air from the blower 52 which passes around the periphery of the deecting member 57 and around the periphery of the ange portion of the member 25.

The heated air then moves forcibly out of the air outlet 23 formed in the truncated portion 22 of the outer shell 16, where the heated air mixes with the atmosd pheric air to raise the temperature in a considerable area around the construction heater. Heat also is radiated to the surrounding atmosphere from the outer shell 16 heated by the forcibly moving heated air.

It will be obvious from the full travel path which the air must take during its course of flow through my improved construction heater, that complete combustion is assured and that any iiame tip from the burner will be prevented from being discharged through the outlet 23 of the heater. Moreover, generation of sparks, and the expelling thereof through the outlet 23, is prevented by reason of the longer travel which the combustion gases must take before leaving the outlet 23, which longer travel assures that all sparks are extinguished before reaching the air outlet 23.

I do not desire to limit myself to the specific details of the construction as herein set forth, as it is obvious that various modifications may be made therein without departing from the essential features of my invention as defined in the appended claims.

I claim:

l. A heater having a fuel burner, comprising an outer shell member having one outer end remote from the fuel burner provided with an open heated air discharge outlet means; closure means at the inner other end of said outer shell member; -an intermediate shell member, having an outer end and an inner ends, within said outer shell member and in spaced relation therewith forming an air passageway between said outer shell member yand said intermediate shell member, said intermediate shell member being open at its inner end and having closure means at its outer other end remote from said fuel burner; an inner shell member within said intermediate shell member and in spaced relation therewith forming an air passageway between said intermediate shell member and said inner shell member, said inner shell member, having an outer end and an inner end, being open at its opposite ends; a cup shaped member, having an axial opening therethrough of substantially the size of said inner shell member integrally connected to the periphery of the inner shell member at its open inner end proximate said fuel burner, said cup shaped member being in spaced relation with said outer shell member `and being open toward the outer end of said outer shell member; a combustion chamber integrally connected with the inner open end of said inner shell member, said combustion chamber having one end means in open communication with the inner open end of said inner shell member; air inlet means in said combustion chamber; power operated blower means, having a discharge outlet means, mounted at the inner end closure means of said outer shell member, said discharge outlet means of said blower means being in open communication with the inner end of said outer shell and with said air inlet means of said combustion chamber; and fuel burner means positioned within said combustion chamber; whereby, when said fuel burner is in operation, the heated products of combustion move forcibly through said inner shell, impinge against said closure means at the outer end of said intermediate shell member Iand then reverse direction of flow and move 4through the space between said inner shell member and said intermediate shell member, and then impinge against said cup shaped member and again reverse direction of flow and flow out the open end of said cup shaped member, mix with atmospheric air under pressure from said blower flowing laround said cup shaped member, and move forcibly through the space between said intermediate shell and said outer shell and flow forcibly through the open heated air discharge outlet of said outer shell member.

2. A heater having a fuel burner, comprising an outer cylindrical shell member having one outer end remote from the fuel burner provided with an open heated air discharge outlet means; closure means at the inner other end of said outer cylindrical shell member; an intermediate cylindnical shell member, having an outer end Iand an inner end,`within said outer cylindrical shell member and in spaced relation therewith forming an air passageway between said outer cylindrical shell member and said intermediate cylindrical shell member, said intermediate cylindrical shell member being open at its inner end and having closure means Eat its outer other end remote from said fuel burner; an inner cylindrical shell member within said intermediate cylindrical shell member yand in spaced rel-ation therewith forming an air passage- WayA between said intermediate cylindrical shell member and said inner cylindrical shell member, said inner cylindrical shell member, having Ian outer end and an inner end, being open at its opposite ends; a cup shaped member, having an axial `opening therethrough of substantially the size yof said inner cylindrical shell member integrally connected to 'the periphery of the inner cylindrical shell member `at its open inner end proximate said fuel burner, said cup shaped member being in spaced relation with said outer cylindrical shell member and being `open toward the outer end of said outer cylindrical shell member; a combustion chamber integrally connected with the inner open end of said inner cylindrical shell member, said combustion chamber having one end means in open communication with the inner open end of said inner cylindrical shell member; lair inlet means in said combustion chamber; power ioperated blower means, having a discharge outlet means, mounted at the inner end closure means of said outer cylindrical shell member, said discharge outlet means of said blower means being in open communication with the inner end of said outer cylindrical shell and with said lair inlet means yof said combustion chamber; rand fuel burner means positioned Within said combustion chamber; whereby, when said fuel burner is in operation, the heated products of combus-tion move forcibly through said inner cylindrical shell, impinge against said closure means at the outer end of said intermedi-ate cylindrical shell member and then reverse direction of flow and move through the space between said inner shell member and said intermediate shell member, and then impinge against said cup shaped member and again reverse direction of flow and flow out the open end of said cup shaped member, mix with atmospheric air under pressure from said blower owing around said cup shaped member, and move forcibly through the space between said intermediate shell and said outer shell `and ow forcibly 'through the open heated air disch-arge outlet of said outer shell member,

3. A heater having a fuel burner, comprising un outer cylindrical shell member having one outer end remote from the fuel burner provided with an open heated air discharge outlet means; closure meansat the inner other end `of said outer cylindrical shell member; an intermedi- -ate cylindrical shell member, having an outer end and an inner end, within said outer cylindrical shell member and in spaced relation therewith forming an air passageway between said outer cylindrical shell member and said intermediate cylindrical shell member, said intermediate cylindrical shell member being open at its inner end and having closure means at its outer other end remote from said fuel burner; an inner cylindrical shell member within said intermediate cylindrical shell member yand in `spaced relation therewith forming an air passageway between said intermediate cylindrical shell member and said inner cylindrical shell member, said inner cylindrical shell member, having an outer end and an inner end, being open at its opposite ends; a cup shaped member, having 'an `axial opening therethrough of substantially the size of said inner cylindrical shell member integrally connected to the periphery of the inner cylindrical `shell member lat its Iopen inner end proximate said fuel burner, said cup shaped member being in spaced relation with said outer cylindrical shell member and being open toward the outer end `of said outer cylindrical shell member; a truncated cone shaped combustion chamber integrally connected with the inner open end of said inner cylindrical shell member, said com-bustion chamber having one end means in open communication with the inner open end of said inner cylindrical shell member; multiplicity of air inlet openings in said combustion charnber; power operated blower means, having a discharge outlet means, mounted at the inner end closure means of said outer cylindrical shell member, said discharge outlet means of said blower means being in open communication with the inner end of said ou-ter cylindrical shell and `with said air inlet openings of said combustion chamber; `and fuel burner means positioned within said combustion chamber; whereby, when said fuel burner is in operation, the heated products of combustion move forcibly through said inner cylindrical shell, impinge against said closure means at the outer end of said intermediate cylindnical shell member and then reverse direction of flow Iand move through the space between said inner cylindrical shell member and said intermediate cylindrical shell member, and then impinge against said cup shaped member and again reverse direction of ilow and ow out the `open end of said cup shaped member, mix with atmospheric lair under pressure from said blower flowing around said cup shaped member, and move forcibly lthrough the space between said intermediate cylindrical shell and said outer cylindnical shell and flow forcibly through the open heated air discharge `outlet of said outer cylindrical shell member.

4. A heater having a fuel burner, comprising an outer cylindrical shell member having one outer end remote from the fuel burner provided with an open heated air discharge outlet means; closure means at the inner other end yof said outer cylindrical shell member; an intermediate cylindrical shell member, having an outer end and an inner end, within said outer cylindrical shell member Iand in spaced relation therewith forming an air passageway between said outer cylindrical shell member `and said intermediate cylindrical shell member, said intermediate cylindrical shell member ybeing open at its inner end and having closure means at its outer other `end remote from said fuel burner; van inner cylindrical shell member within said intermediate cylindrical shell member and in spaced relation therewith forming an air passageway between said intermediate cylindrical shell member and said inner cylindrical shell member, said inner cylindrical shell member, having an outer end and -an inner end, being `open at its opposite ends; a cup shaped member, having `an axial opening therethrough of substantially the size of said inner cylindrical shell member integrally connected to the periphery of lthe inner cylindrical shell member at its vopen inner end proximate said fuel burner, said cup shaped member being in spaced relation with said outer cylindrical shell member and being open .toward the outer end of said outer cylindrical shell member; a truncated cone shaped combustion chamber integrally connected with the inner open end of said inner shell member, said combustion chamber having one end means in open communication with the inner open end of said inner shell member; a multiplicity of air inlet openings in said combustion chamber; power operated blower means, having a discharge outlet means, mounted at the inner end closure means of said outer cylindrical shell member, said discharge outlet means of said blower means being in open communication with the inner end of said outer cylindrical shell and with said `air inlet openings of said combustion chamber; a baffle member extending outwardly from said combustion chamber, the perimeter of said bafe member being in spaced relationship to said outer cylindrical shell member to afford a restricted passageway for flow of -air from said blower -to said `air passageway between said outer cylindrical shell member and said intermedi-ate cylindrical shell member; and fuel burner means positioned within said combustion chamber; whereby, when said fuel burner is in operation, ythe heated products of combustion move forcibly through said inner cylindrical shell, impinge against said closure means at the outer end of said intermediate cylindrical shell member and then reverse direction of ow and move through Ithe space between said inner cylindrical shell member and said intermediate cylindrical shell member, and then impinge against said cup shaped member and again reverse direction of flow and ilow out the open end of said cup shaped member, mix with atmospheric air under pressure from said blower flowing around said cup shaped member, yand move forcibly through the space between said intermediate cylindrical shell and said outer cylindrical shell and flow forcibly through lthe open heated air discharge outlet of said outer cylindrical shell member.

References Cited in the le of this patent UNITED STATES PATENTS 2,174,663 Keller Oct. 3, 1939 2,565,843 Dennison Aug. 28, 1951 2,720,753 Sharpe Oct. 18, 1955 2,896,933 Barnes July 28, 1959

Claims

1. A HEATER HAVING A FUEL BURNER, COMPRISING AN OUTER SHELL MEMBER HAVING ONE OUTER END REMOTE FROM THE FUEL BURNER PROVIDED WITH AN OPEN HEATED AIR DISCHARGE OUTLET MEANS; CLOSURE MEANS AT THE INNER OTHER END OF SAID OUTER SHELL MEMBER; AN INTERMEDIATE SHELL MEMBER, HAVING AN OUTER END AND AN INNER ENDS, WITHIN SAID OUTER SHELL MEMBER AND IN SPACED RELATION THEREWITH FORMING AN AIR PASSAGEWAY BETWEEN SAID OUTER SHELL MEMBER AND SAID INTERMEDIATE SHELL MEMBER, SAID INTERMEDIATE SHELL MEMBER BEING OPEN AT ITS INNER END AND HAVING CLOSURE MEANS AT ITS OUTER OTHER END REMOTE FROM SAID FUEL BURNER; AN INNER SHELL MEMBER WITHIN SAID INTERMEDIATE SHELL MEMBER AND IN SPACED RELATION THEREWITH FORMING AN AIR PASSAGEWAY BETWEEN SAID INTERMEDIATE SHELL MEMBER AND SAID INNER SHELL MEMBER, SAID INNER SHELL MEMBER, HAVING AN OUTER END AND AN INNER END, BEING OPEN AT ITS OPPOSITE ENDS; A CUP SHAPED MEMBER, HAVING AN AXIAL OPENING THERETHROUGH OF SUBSTANTIALLY THE SIZE OF SAID INNER SHELL MEMBER INTEGRALLY CONNECTED TO THE PERIPHERY OF THE INNER SHELL MEMBER AT ITS OPEN INNER END PROXIMATE SAID FUEL BURNER, SAID CUP SHAPED MEMBER BEING IN SPACED RELATION WITH SAID OUTER SHELL MEMBER AND BEING OPEN TOWARD THE OUTER END OF SAID SHELL MEMBER; A COMBUSTION CHAMBER INTEGRALLY CONNECTED WITH THE INNER OPEN END OF SAID INNER SHELL MEMBER, SAID COMBUSTION CHAMBER HAVING ONE END MEANS IN OPEN COMMUNICATION WITH THE INNER OPEN END OF SAID INNER SHELL MEMBER; AIR INLET MEANS IN SAID COMBUSTION CHAMBER; POWER OPERATED BLOWER MEANS, HAVING A DISCHARGE OUTLET MEANS, MOUNTED AT THE INNER END CLOSURE MEANS OF SAID OUTER SHELL MEMBER, SAID DISCHARGE OUTLET MEANS OF SAID BLOWER MEANS BEING IN OPEN COMMUNICATION WITH THE INNER END OF SAID OUTER SHELL AND WITH SAID AIR INLET MEANS OF SAID COMBUSTION CHAMBER; AND FUEL BURNER MEANS POSITIONED WITHIN SAID COMBUSTION CHAMBER; WHEREBY, WHEN SAID FUEL BURNER IS IN OPERATION, THE HEATED PRODUCTS OF COMBUSTION MOVE FORCIBLY THROUGH SAID INNER SHELL, IMPINGE AGAINST SAID CLOSURE MEANS AT THE OUTER END OF SAID INTERMEDIATE SHELL MEMBER AND THEN REVERSE DIRECTION OF FLOW AND MOVE THROUGH THE SPACE BETWEEN SAID INNER SHELL MEMBER AND SAID INTERMEDIATE SHELL MEMBER, AND THEN IMPINGE AGAINST SAID CUP SHAPED MEMBER AND AGAIN REVERSE DIRECTION OF FLOW AND FLOW OUT THE OPEN END OF SAID CUP SHAPED MEMBER, MIX WITH ATMOSPHERIC AIR UNDER PRESSURE FROM SAID BLOWER FLOWING AROUND SAID CUP SHAPED MEMBER, AND MOVE FORCIBLY THROUGH THE SPACE BETWEEN SAID INTERMEDIATE SHELL AND SAID OUTER SHELL AND FLOW FORCIBLY THROUGH THE OPEN HEATED AIR DISCHARGE OUTLET OF SAID OUTER SHELL MEMBER.