US906416A - Heating-furnace. - Google Patents

Description

J. J. HARKINS.

HEATING FURNACE.

APPLICATION FILED MAR. s, 1907.

Patented Dec. 8, 1908.

2 SHEETS-SHEET 1.

J. J. HARKINS.

HEATING FURNACE.

APPLICATION FILED MAR. a, 1907..

Patented Dec. 8, 1908.

2 SHEBTS--SHEBT 2.

Ham,

No. scenic.

Specification of Letztere Patent.

Patented Dc. 8`, 190'8.

` Application med umn s, 19o?. semi No. 361,401.

To all whom 'it may concern:

Be it known that I, JAMES J. HARKrNs, a resident of Pittsburg, in the county ofAllegheny and State of Pennsylvania, have invented a new Vand useful Improvement in Heating-Furnaces; and I do declare the followin to be a full, clear, and exact description t ereof.

My invention relates to heating furnaces and has special reference to what are known as continuous heating furnaces for the heating of billets, blooms, slabs, etc.

The object of my invention is to provide a heating furnace which will be cheap, simple and efficient in its construction and operation, in which the metal can be heated in less time and with less labor than in the ordinary .class of these furnaces, as well as one whi will thereby cheapen the cost of production and will facilitate repairs.

My invention consists, generally stated, in the novel arrangement, construction and combination of parts, as hereinafter more specifically set forth and described and particularly ointed out in the claims.

To ena le others skilled in the art to which my invention appertains to construct and use my invention, I will describe the same more fully referring to the accompanying drawings, in Which- Figure 1 is a vertical central section of my v improved apparatus for heating furnaces and showing a section of the furnace through the as ilues. Fig. 2 is a horizontal section of the mace on the line 2 2 Fi 1 looking in the direction of the arrows an showing some of the parts broken away. Fig. 3 is a vertical central section of the furnace, taken at right angle to Fig. 1 on the line 3-3 Fig. 2 and showin some of the parts broken away and in full es. Figs. 4Y and 5 are detail views.

Like symbols of reference herein indicate like parts in each of the figures Vof the drawing.

As shown in the drawings the general form or superstructure of the furnace 1 is the same as the usual form of a regenerative or recuperative furnace-as shown, and Within the eating chamber 2 and running arallel with the sides of the furnace are the ivision walls 3, which are provided with the transverse archways 4 p to allow the char e of metal within the furnace 1 to pass un er the same in its movement within said furnace as hereinafter described. The furnace 1 being of the usual form is provided with the gas iiues a which lead from the gas. generating chambers b and into the chamber 2 with the air flues c which lead from the usual source of supply into said chamber alongside of said flues a. r

Within the center of the furnace 1 is the table, hearth or bottom 5 for the'charge of metal and this bottom is circular and revoluble and is composed of the fire-brick hearth portion 6 which is provided with the built-up annular ortions .7 extending up from the same wit the outer one bein ownwardly inclined towards the center o the furnace. Between these portions 7 is placed a sandbed 7 having its upper face formed concave between the portions 7 and its inner side to form a recessed or corrugated face and such bottom 5 is su ported on a plate 5 which is connected to t e angle-bars 6 atits sides and within the inner and outer portions 7. The bottom 5 is provided with the central opening 10 through the same and within said opening the central furnace portion 10 is built and supported on a central column 11. The column 11 is preferably formed of hollow cast iron and extending loosely around the same is a movable sleeve 11. Arms 12 extend radially out from a loose sleeve 13 on the column 11 and are attached thereto, and these arms have the gear wheel or face 12 at outer ends of the same, while such arms are also connected to the late 5 of the bottom 5 through the vertical disposed plates 5 On the underside o the arms 12 is a track 13 for engaging with anti-friction rollers 14 which are mounted upon one end of the pins 15, while the opposite ends of these pins are attened and secured between plates 16 in any suitable manner. On the upper and lower ends of the plates 16 are the flanged wheels 17 which are munted on pins 18passing through said plates and thereby form a columns 20 are preferably formed of two channel bars and the lates 16 of the movable carriage 19 assetween them so that the rollers 17 will bear against each side of said columns and thereby properly support the bottom 5 by said carriage.

The weight 24 will act to support the carriage 19 which in turn su ports the bottom 5 through the rollers 14 an the columns 20 act as a guide and support for the movable carriage 19, as well as the sheave 23 and four of these carriages are shown around the circumference of said bottom, but it is evident that any number can be used.

Engaging with the gear wheel 12 is the pinion 25 which is keyed by a feather around a vertical shaft 26 and this shaft has a worm wheel 27 at its lower end for being engaged by a worm 28 mounted on a horizontal shaft 29. Mounted on the shaft 29 is a gear-wheel 30 which meshes with a pinion 31 mounted on a shaft 32 which carries a gear-wheel33 meshing with a pinion 34 on the armature shaft 35 of a motor 36.

Fulcrumed at 37 on a bearing 38 supported by a standard 39 is a vibrating lever 40 which is formed of two bars and spaced far enough to allow of the fulcrum 37 being laced between them and at one end of said) lever are secured the straps 41 which are connected at their free ends with pins 42 extending out from the annular seat. 43 formed in the movable sleeve 1 1 through slotted holes 44 in said ends of said straps. A vertical screw-rod 45 is psivotally connected at its lower end to lin 46 which are pivotally connected to said lever 40 and the up er end of said rod passes through a stan 47 and is screw threadedly connected within a worm-wheel 48 secured on said stand by means of a bar 49 through which said rod loosely passes. A worm 5() is mounted on a shaft 51 secured on the stand 47 and such shaft is provided with two crank levers 52 for raising and lowering the rod 45.

The use and operation of my improved aparatus for heating furnaces is as follows:- en power is applied to the motor 36 the shaft 35 will be revolved which will act to revolve the shaft 29 through the gears 33 and 34, shaft 32 and gears 30 and 31, and as such. shaft 29 is thus revolved the shaft 26 will be revolved throu h the worm 28 and its wheel 27, which will also revolve the bottom 5 through the pinion 25 on the shaft 26 engaging with the gear-wheel l2 on said bottom. During this revolvin of thebottom 5 the billets, blooms or sla s; etc., such as A are charged into the chamber 2 of the furnace 1 through the opening B in said furnace in any suitable manner, so that they will lie on the outer and intermediate portions 7 on said bottom as shown in Figs. 2 and 3, to allow for the circulation of the heat under the same through the spaces formed by the upper concave face on the sand bed 7', and such charging can be accomplished automatically or otherwise by any suitable mechanism, as throu h the medium of an automatic sprocket mec anism shovm diagrammatically in Fig. 3 at C. 'lhis mechanism C is composed of a sprocket chain 53 which passes through the opening B, and over the sprocket wheels 54, the inner of which is located within said opening and chamber 2 over the bottom 5, and such chain is provided with iingers 55 for engaging with the metal A to be carried into said chamber from the table 56 to be heated. They chain 53 can be operated from the shaft 29 by means of any suitable mechanism such as the pinion 57 on said shaft meshing with a gear-wheel 58 on a shaft 59 which is provided with a 'sprocket wheel 60 having a s rocket chain 61 passing around the same and) around a like wheel 62 on the shaft 63 carrying the outer sprocket Wheel 54.

As the bottom 5 in the furnace 1 is revolved the metal A charged onto said bottom is heated within the chamber 2 and when such metal reaches the opening D in the furnace 1 adjacent to the opening C therein it can be discharged in any suitable manner and automaticallyif desired, as by means of a tilting bar 64 extending into said chamber through said opening D and o erat'ed by any suitable mechanism connecte to the mechanism for charging the metal into the furnace or other mechanism, as is desired.

The revolving bottom 5 ofthe furnace 1 is counterbalanced through the weight 24 when about one-halfof a charge of metal is within the chamber2 of said furnace, so that when a full charge is within said furnace some `upward compression may be placed upon the rod 45, and when it is desired to lower the bottom 5 the operators can turn the levers 52 in the proper direction which will act to raise :the rod 45 Athrough the medium of the worm 50 and its wheel 48 and draw up the outer end of the tilting lever 4() and lower its inner end, so that this end will carry down the sleevell on the column 11 and with it said bottom. As the bottom 5 is thus lowered the gear-Wheel 12. on the same will be lowered therewith, as well as the pinion 25 on the shaft 26 and in the raising of said 4bottom by a reverse movement of the cranks 52 the movable sleeve 11 and said bottom will be raised through the means above described, so that the inion 25 will be raised with the bottom an through its meshing with the wheel 12 permit said bottom to revolve when power is applied from the motor 36 for its operations. During the raising and lowering of the bottom 5 the carria e 19 will be moved on the columns 2() throu the wei hts 24 in the same direction wit the sai bottom and with the plates 16 moving within the said columns, so that in such movement of the bottom the rollers 14 on said carriage will be in engagement with and support said bottom.

Various modifications andI changes in the design, construction and operation of the various parts ,of my improved ap aratus for heating furnaces may e resorte to without lll@ departing from the spirit of the invention or sacrificing any of its advantages.

It will thus be seen that my im roved apparatus for heatin furnaces can e a plied to any form of a eating furnace an with the use of char ing and discharging devices on the same these operations can be performed continuously and automatically and the whole charge may be drawn and relaced in a very short space of time if it is found necessary to do so, while these operations can be carried on at one side of the furnace and adjacent to each other, thus savin heat and reducin oxidationby shutting o large quantities o cold air:

The devices are easily and conveniently operated and will not be brought into contact with the heat of the furnace, while they can be water-cooled if desired. They will not get out of order and will be ldurab e and strong, and at the same time they 'will be positive and easy to operate at all times and without the employment of complicated mechanism. n

What I claim as my invention, and desire to secure by Letters Patent, is

1. A heating furnace having a heating chamber, a column, a revolving bottom within said chamber, means including a weight.

for supporting the outer portion of said bottom in all its positions a movable sleeve on said column for carrying said bottom, and a screw operated tilting lever or bar connected to said sleeve for'ralsing and lowering .said bottom.

2. A heating furnace having a heating chamber, a column, a revolving bottom within said chamber, means including a weight for supporting the outer portion of said bottom in all its positions a movable sleeve on said column for carrying said bottom, a tilting lever or bar connected to said sleeve, andv a screw-rod loosely connected to said bar for raising and lowering said bottom.

3. A heating furnace having a heating chamber, a column, a revolving bottom within said chamber, means including a weight for supporting the outer portion of said bottom in all its positions a movable sleeve on said column for carryingrsaid bottom, a tilting lever or bar connected to said sleeve,` a rod connected to said bar,l and means connected to said rod for tiltin said bar in the raisini and lowering of said ottom.

4. heating furnace having a heating chamber, a column, a revolving bottom within said chamber, means including a weight for supporting the outer portion of said bottom in all its positions a movable sleeve on said column for carrying said bottom, a tilting lever bar connected to said sleeve, a rod connected to said bar, a worm-wheel screwthreadedly connected to said rod, and a worm engaging with said wheel for moving said rod to tilt said bar in the raising and lowering of said'bottom.

5. A heatingfurnace having a heating chamber, and a revolving circular bottom within said chamber having its upper face rovided with annular corrugations extendmg u from and around the same for the free circu ation of heat around the metal placed thereon to be heated. v

6. A heating furnace having a 4heatin chamber, a revolving bottom Within sai chamber having its upper face rovided with corrugations extending up om the same for the circulation of heat around the chamber, upwardly extending portions at its outer edge and intermediate thereof to'form corrugatlons and said outer portion bein inclined downwardly toward the center o the furnace, and a sand-bed on said face and within the recesses formed between said portions and its inner side.

In testimony whereof I have signed my name to this specification inthe presence of l witnesses.

two subscribin p S J. HARKINS. [1.. s.] Witnesses:

C. J. HOFFMANN,

L. P. HOFFMANN.

Images