US1679145A - Furnace - Google Patents

Description

July 31, 1928.

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W. H. WINEMAN FURNACE Filed April 1927 I5 Sheets-Sheet 3 Wade 702 210720,. 53 4' MM awg/ Patented July 31, 1928.

UNITED STATES PATENT OFFICE. 1

WADE H. WINEMAN, OF MICHIGAN CITY, INDIANA, ASSIGNOR TO SULLIVAN MACHINERY COMPANY, A CORPORATION OF MASSACHUSETTS.

FURNACE.

Application filed April 1,

object is to provide an improved furnace which is of an exceedingly rugged and compact character and wherein the cost of manufacture and the fuel consumption are reduced to a minimum. Still another object is to provide an improved drill steel furnace of the oil atomizer burner type having the air supply pipe arranged in a novel manner in the pat-h of the waste products of combustion discharged from the heating chamber to enable the air used for atomization to be preheated. Another object is to provide an improved air shield for the operator whereby the blast of burning gases is prevented from blowing toward the operator. the air shield having an improved air jet whereby air consumption is materially reduced. Yet another object of this invention is to provide a drill steel furnace having an improved general arrangement of parts.

These and other objects of this invention will hereinafter more fully appear.

In the accompanying" drawings there is shown for purposes of illustration one embodiment which the invention may assume in practice.

In these drawings, A

Fig. 1 is a front elevational View of the improved furnace, parts being broken away to show details of construction.

Fig. 2 is an end elevational view of the furnace shown in Fig. 1.

Fig. 3 is a transverse horizontal sectional view taken on line 33 of Figs. 1 and i.

Fig. 1 is a transverse vertical sectional view taken substantially on line 44 of F ig. 1.

Fig. 5 is a detail sectional view taken on line 55 of Fig. 2.

F ig. 6 is a detail sectional view illustrating details of the improved air jet.

Fig. 7 is a detail horizontal sectional view taken on line 7'-7 of Fig. 1.

Fig. 8 is a central longitudinally extending vertical sectional view taken on line 88 of Fig. 4.

In this illustrative embodiment of the invention there is shown a drill steel furnace generally designated 1 herein of the oil atonr izer burner type and comprising a rec- 1927. Serial No. 180,254.

tangular or box-like easing 2 supported on legs 8, the legs being constructed and con nect-ed to the casing 2 in an improved manner. As illustrated the bottom of the easmg 2 1S depressed thereby forming an elongated recess 4 extending longitudinally of the casing. Lying within the recess 4 are fire bricks 5 disposed end toend longitudinally of the casing. Disposed parallel with thebricks 5 at each side thereof but supported to project thereabove are fire bricks 6. Disposed transversely of the furnace and supported on the bricks 6 are fire bricks 7 having inclined ends 8. The end of the chamber 9 remote from the burner 18 closed by vertical bricks 7 supported by the bricks 5, 6. As clearly shown in Fig. 4 the tire bricks 5, 6, 7 and 7 form a laterally restricted combustion chamber 9 ex tending substantially throughout the length of the casing 2. I The combustion chamber 9 is provided at its upper end with a narrow elongated opening 10 through. which the combustible mixture flows. Supported on their sides upon. the series of rearbricks 7 are fire bricks 11 while supported edgewise on and extending transversely of the furnace are fire brick 12. Abutting theforward ends of the brick 12'. and disposed lengthwise vertically are fire brick 13 having inclined bottom surfaces 14. Supported on the vertical bricks 7 and having its rear surface abutting the bricks 11 in a horizontal brick 13 while supported on the brick 7 .at the other end of the furnace and likewise abutting the bricks 11 are horizontal bricks 145. The fire bricks 7, 7, 11, 12, 13. 13 and 14 cooperate to form an elongated heating chamber 1.5 disposed above and parallel with the combustion chamber. The chamber 15 has its rear portion'projecting laterally of the combustion chamber andis open at its front'side at 16 to permit the insertion of the articles to be heated, herein rock drill steels 17, within the heating chamber. A. longitudinally disposed horizontal plate 18 lies on the front bricks and forms a support for the drill'steels. It willherein be noted that the fire bricks 5, 6, 7, 7, 11, 13 andl lare supported within the casing 2, the spaces between the bricks and the casing being luted withfire clay. The bricks are heating 1 equally to the casing thereby causing a substantially equal expansion of the metal at all points. I

Referring more particularly to F gs. 1 and 5 it will be observed that disposed at each end of the furnace are plates 19 and 20 provided with depending hook portions 21 which engage a vertical projection 22 formed on the casing 2 for preventing forward movement of the bricks 12 and 13 forming the cover. The plate 20 is recessed at 23 and disposed within these recesses are coiled springs 24 which react between the frame 2 and the fire bricks 12 and 13 and these springs compensate for any expansion or contraction of the fire bricks. In this instance the plates 19 and 20 are held together by tie rods 25, these tie rods maintaining the coiled springs 24}; under constant tension. It will herein also be noted that the bricks 12 and 13 which are held in position by the tie rods, the end plates, and the bricks held thereby cooperate to form a cover forthe heating chamber which is removable from 4 the furnace as a unit thereby facilitating the assembly and dismantling of the furnace. As previously pointed out the furnace is herein of the oil atomizer burner type and is provided with a burner 26 suitably secured to the end of the casing 2 and slightly inclined relative to the horizontal. Due to the inclination of the burner the flame is discharged slightly upwardly toward the opposite end of the combustion chamber 9 and thereby the heat is concentrated at that end of the chamber. The burner 26 is provided with the usual needle valve having a controlling hand wheel 27? and oil and air supply pipes 28 and 29 respectively. As shown the air pipe 29 extends laterally from the burner 26 and then vertically at 30, the pipe then extending longitudinally over the top of the furnace at 31 laterally across the end of the furnace at 32 and then longitudinally of the furnace at 33 parallel with the portion 31 and disposed just above the discharge opening 16 of the heating chamber, the pipe 33 then extending downwardly through a suitable pressure reducing valve 34 to a suitable source of supply. It is ac cordingly evident that by arranging the air supply pipe for the burner in this improved manner it is possible to preheat the air flowing to the burner by means of the discharg ing gaseous mixture from the furnace.

An improved air shield 35 is provided at the front of the furnace for deflecting the blast of the furnace discharge and this shield specifically comprises a pipe 36 supported within lateral lugs 37 herein formed integral with the casing 2. As clearly shown in Fig. 3 one end of the pipe 36 is closed by a cap member 38 while the opposite end of the pipe has secured thereto an air jet 39. The air jet comprises a bracket 10 secured to the pipe 36 by a set screw 41 while supported by this bracket is a jet or ejector 4-2 connected through a pipe 43 to the burner air supply and controlled by a manually operable valve 4 1. The jet member 42 is provided with an opening 45 to which air (under pressure is admitted, the compressed air flowing from the opening 45 through a restricted passage 46, the jet discharging a blast of air at high velocity within the pipe 36 of the shield. Due to the high velocityof the air dischargedfrom the jet air at atmospheric pressure is drawn or sucked into .the pipe 36 thereby increasing the volume, the air discharging from this pipe through angularly located openings 47. It is therefore obvious that the blast of burning gases discharged from the heating chamber through the opening 16 is deflected by air ischarging through the openings 47 in the air shield pipe 36. A U shaped rack or support 13 is provided for supporting the drill steels 17 during heating thereof and this rack has parallel portions 19 slidably mounted within openings 50 formed in the casing 2. The rack 48 may he slid inwardly or outwardly as desired relative to the furnace casing thereby permitting steels of different lengths to be supported within the furnace. i

As previously pointed out the legs 3 supporting the furnace structure are constructed and connected to the furnace casing in an inrproved manner. The legs 3 consist of pipes 51 projecting at their upper ends with an opening 52 formed in the casing 2, the pipes 51 abutting the bottoms of these recesses. As clearly shown'in Fig. 7 the pipes 51 are each held against spaced projections 53 in the recess by means of a set screw 54. the set screw rigidly clamping the pipe in position. The lower ends of the pipes 51 are driven within tapered annular recesses 55 formed within feet 56, the latter being loosely connected to the pipes 51. I

In the use of the improved drill steel furnace after the furnace has been started up and the burner-is discharging its flame in the proper manner the rack 18 is suitably adjusted and the drill steels 17 inserted within the heating chamber directly over the discharge 10 of the combustion chamber 9. The burning mixture discharging'from the' opening 10 flows past the ends of the steels into the heating chamber 15 wherein the heat is deflected onto the steels by the inclined surfaces 14:. As the burning mixture discharges from the heating chamber through the opening 16 the air flowing through the pipe 33 to the burner is preheated and consequently the efficiency of the burner is materially increased. The operator standing in front of the furnace inserts the cold steels at the burner end of the heating chamber 15 which is the point of lowest III! temperature in the furnace while the heated steels are removed from the furnaceat the end thereof remote from. the burner discharge, the steels being moved along longitudinally of the furnace during the heating operation. As the operator stands in front of the furnace the flame discharging from the heating chamber is deflected by the blast of air flowing from the air shield 35.

As a result of this invention an improved drill steel furnace is provided which is extremely rugged and compact in construction. It will further be notedthat by. pro-heating the air flowing to the burnerthe efficiency thereof is materially increased. It will further be evident that the cost of manufa cturing has been materially reduced, machined parts being reduced to a minimum. These and other uses and advantages of the improved furnace will be clearly apparent to those skilled in this art. 1

\Vhile I have in this ap plication specifically described one form which my invention may assume in practice, it will be understood that this form of thesame is shown for purposes of illustration and that the invention may be modified and embodied in various other forms without departing from its spiritor the scope of the appended claims.

What I claim as'new and desire to secure by Letters Patent is: i

In a furnace, an elongated combustion chamber having a relatively restricted slotted top opening, an elongated heating chamber of uniform cross section directly above and substantially coextensive with said. combustion chamber with which said restricted opening communicates, and a. laterally located flue formed in one side of said heating chamber through, which the articles to be heated are insertible and which constitutes the sole vent from the heating chamber. I

2. In a furnace, an elongated combustion chamber having a relatively restricted slotted top opening, a burner disposed at one end of said combustion chamber and discharging longitudinally thereof, an elongated heating chamber of, uniform cross section directly above and substantially cos extensive with said combustion chamber with which said restricted opening communicates, and a lateral fine in the side of said heating chamber through which thearticles to be heated are insertible and which constitutes the sole vent from the heating chamber.

3. In a furnace, an elongated combustion chamber having a longitudinally elongated, relatively restricted top opening, a burner disposed at one end of said combustion chamber and discharginglongitudinally thereof, said burner being inclined relative to the horizontal and discharging upwardly along stricted opening communicates, said heating chamber being of substantially the same length as said opening, and a lateral flue in the side of. said heating chamber through which the articles to beheated are insertible.

4b In a furnace, an elongated combustion chambenhaving a longitudinally elongated, relatively restricted topopening, a burner discharging longitudinally of. said chamber, an elongated heating chamber abo 'c said combustion chamber with which said restricted opening communicates, said heating chamberihaving a top wall with aninclined heat reflecting surface-directly above said restricted openingv tendingto reflect heat inwardly of said chamber andtoward said opening, and a lateral flue in the side of said heating chamber through which the articles to .beheated are insertible.

5. In a furnace, an. elongated combustion chamber having a substantially horizontal. bottom. inwardly and upwardly inclinedside walls, and a relatively restricted top opening a burner discharging longitudinally of said combustion;chamber, an elongated heating chamber. disposed above said combustion chamberwith which said restrict ed opening communicates, said heating chamber having a portionextending laterally of said combustion chamber, and a lateral flue in theside of said heatingcha nber located opposite fromfsaid laterally extendingportion through whiclithe articles to be heated are insertible. v a A 6. In a furnace, anelongatc'd combustion chamber haying substantially horizontal bot-tom, inwardly and upwardly inclined side walls and a relatively restricted top opening extending longitudinally ofsaid chamber, a burner discharging combustion chamber, an elongated heating chamber disposed above said combustion chamber with-which said restricted opening comn iunicates, said heating chamber having a portion projecting laterally of said com bustion chamber and a top wall with an inclined heat reflecting said opening tending to reflect heat inwardly of said chamber and toward said opening, and a lateral opening in said heating chamber located opposite from said laterally extending portion through which the articles to be heated are insertible.

7. In a furnace, an elongated combustion chamber having a substantially horizontal bottom, inwardly and upwardly inclined side walls and a relatively restricted top opening extending longitudinally of said chamber. a

burner discharging longitudinally of said combustion chamber and adapted to generate longitudinally of said loo loo

said opening,

a lateral opening also forming a flue through which burned gaseous mixture is discharged from the furnace.

8. In a furnace, a metallic casing lined with lire brick, a combustion chamber formed by said brick, and a communicating heating chamber above said combustion chamber, said heating chamber having a lateral opening through which forgings may be inserted and removed, and a removable top for said heating chamber comprising a series of lire brick, plates disposed at each end of said fire brick, tie rods for maintaining said plates together, and springs carried by one of said plates and engaging said fire brick, said plates, rodsand springs resiliently hold ing said bricks together.

9. In a furnace, a metallic casing lined with fire brick and forming a combustion chamber and a communicating heating chamber above said combustion chamber, and a re movable top for said heating chamber comprising a series of fire brick, plates disposed at each end of said fire brick, tie rods for maintaining said plates together, and springs carried by one of said plates and engaging said fire brick, said plates, rods and springs resiliently holding said bricks together, said plates also having hooked portions engaging the side of said casing for preventing move nent of said top relative to said casing in one direction.

10. In a furnace, a casing lined with fire brick and forming a combustion chamber, a communicating heating chamber above said combustion chamber, said heating chamber having a lateral opening through which forgings may be inserted and removed, and a removable top for said heating chamber comprising elements having portions interlocked with one side of said casing for preventing movement of said top relative to said casing in one direction.

11. In a furnace, an elongated combustion chamber having a relatively restricted top opening, an elongated heating chamber above said combustion chamber with which said restricted opening communicates, a lateral opening in said heating chamber through which the burned gaseous mixture from the furnace discharges, and an air shield disposed in front of said furnace adjacent said'lateral opening for discharging air under pressure'toward said opening to deflect the discharging flame, said air shield including a hollow member having a series of perforations therein, and an injector through which air is discharged into said hollow member.

12. In a forging furnace, an elongated combustion chamber having a longitudinal restricted opening in the top thereof for the escape of products of combustion, a burner connected with said combustion chamber adapted to generate different degrees of heat at dili'erent points along said longitudinal opening, a substantially enclosed heating chamber above said opening, .the top wall thereof presenting an inclined surface tending to reflect heat inwardly of said chamber and toward said opening, nally extending aperture in a side wall of said heating chamber for the insertion and removal of forgings at various'points along said longitudinal openin 13. In a forging furnace, an elongated combustion chamber having a longitudinal top opening for the escape of products of combustion, an elongated heating chamber above said combustion chamber having a lollgit-udinal flue opening through a lateral wall thereof, and means for deflecting the gases discharged from said flue comprising a pipe extending parallel with said flue opening and having a series of upwardly directed openings therein and an injector connected to the supply end of said pipe adapted to force air from the atmosphere into said pipe and through said openings.

I In testimony whereof I ll'IlX my signature.

WADE n. IWIN MAN.

and a longitudh,

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