US729540A - Furnace. - Google Patents

Description

PATE'NTED TUNE 2, 1908.

E. H. CARROLL.

FURNACE.-

APPLICATION rmm n-ov. mg, 1901.

2 SHEETS-SHEET .1-

KO IODEL.

No. 729,540 PATENTED JUNE 2, 1903. E. H. CARROLL.

FURNACE. 4

APPLICATION TILED NOV. 25, 1901. I

' 2 SHEETS-SHERYL m: NORRIS Pzrsns co. worn-Limo, wAsnma'rum n c.

:INrEED STATES Patented June 2, 1903.

PATENT OFFICE.

EI JBERT H. CARROLL, OF WORCESTER MASSACHUSETTS, ASSIGNOR TO MOR- GAN COlNSTRUCTION COMPANY, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

FURNACE.

SPECIFICATION forming part of Letters Patent N0. 729,540, dated' June 2, 1903.

Application filed November 25,1901. SerialiNo. 83,670. KNomodel.)

'l'o alZ whom it map/concern;

Be it known that I, ELBERT H. CARROLL, a citizen of the United States, residing at Worcester, in the county of WVorcester and Commonwealth of Massachusetts, have invented a new and useful Improvement'in Furnaces, of which the following is a specification, accompanied by drawings forming part of the same, in which Figure 1 represents a plan view of a furnace embodying my invention and represented in sectional view by the-removal of the roof por tion in order to disclose the heating-chamber and the mechanism embodying my present.

invention. Fig. 2 is a central vertical longitudinal sectional View of that part of the furnace represented in Fig. 1. Fig. 3is a transverse sectional view on line 3 3, Fig. 2; and Figs. & to 12, inclusive, are diagrammatical views illustrating the different positions of the billet lifting and turning mechanism and also illustrating its action upon the billets at different periods of its movement. Similar reference-letters refer. to s'imilar parts in the different views.

My present invention relates to a furnace for heating billets; andit has for-its object to provide means for the uniform-heatingof the different sides of the billet and for the better diffusion of heat through the mass ofv the billet, and I accomplish this result by providing means for successively turning-each billet as it approaches the delivery-opening of the furnace in order to, present the different sides of the billet to the action of heated gases and for maintaining open spaces be-' tween the billets as they approach-the delivcry-opening; and my invention consists intaining an open spacerbetween ,it and the next succeedingbillet to" permit the circulation around: the billet of' heated gases. In

per ends with teeth E spacedto receive a billet between them, and

anism for this purpose and embodying my invention, the novel featureshaving been set forth in the annexed claims.

Referring to the accompanying drawings, A A denote the sidewalls, and B the roof, of a billet-heating furnace having a heating- .chamber C, provided with a longitudinal a hearth or supporting-surface D. As the advancing billet in the series C falls upon '.the supporting-surface D it occupies the position of the billet a, Figs. 2 and 4. The

hearth D isprovided with openings D for a 'pair ofvertical reciprocating lifting-plates E,

supported at their lower-ends by a transverse oscillating beam E and provided at their up- The teeth E are the forward sidesE of each of the teeth are inclined, while therear sides E are vertical. The rocking bar'E' is provided with arms E E connected by links E E with bell-cranks E E The bell-cranks E E are connected by a link E with a reciprocating piston-rod E of a steam or hydraulic cylinder E by which .a rocking motion is imparted to the bell-cranks E E anda rising-and-falling movement to the lifting plates E, by which the ends of the teethE are carried from a" position above the hearth D, as shown in,Fig.

4, to a position .below the hearth D, asshown in- Fig. 5, anduvice'versa. The arms E at the opposite ends of therocking bar E are connected by links E with arms.E attached to a rocking shaft E which extends transversely across the furnace and is actuated by a hydraulic or steam cylinder E having its piston-rod E operatively connected with a radial arm E on the rocking shaft E The oscillating motion of the shaft E imparts a backward-and-forward movement in a horizontal plane to the liftingplates E. By means of the connected actuating mechanism as described the following motions are imparted to the lifting-plates E, as illustrated in the diagrammatical views, Figs. 4: to 12, incl usive In the normal position of theliftingplates E the teeth E are raised above the supporting-hearth D and at a suflicient distance from the inclined section 0 of the track to allow a billet to rest upon the hearth D in the position of the billet a, Fig. 4, and against the vertical side of the first. tooth upon the liftingplates E. At the first movement of the lifting-plates E they are carried vertically downward into the position shown in Fig. 5, with the ends of the teeth E a short distance below the surface of the supporting-hearth D. The second movement imparted to the liftingplates E moves them forward in the direction of the arrow 1, Fig. (3, in order to bring the first tooth beneath the edge of the billet a. The third movement raises the lifting-plates E, causing billet a, to be turned over onequarter turn, as shown in Fig. 7, the complete elevation of the lifting-plates E carrying them into the position shown in Fig. 8, with the billet a between the first two teeth of the lifting-plates and moved along a short distance from the inclined section C of the track. The fourth movement depresses the lifting-plates into the position shown in Fig. 9. The fifth movement of the lifting-plates carries them back in the direction of the arrow 2 into a position with the first toot-h beneath the edge of the billet a. The sixth movetnent carries the lifting-plates upward, turning the billeta one-quarter turn and holding it between the first and second teeth of the lifting-plates, as shown in Fig. 11, and leaving a space 0 between the vertical side of the first tooth and the inclined section C of the track. A reciprocating motion is then given to the pushing mechanism in the usual and well-known manner, by which the whole series of billets are moved along and the advancing billet I) pushed over into the space between the inclined section of the track and the upright side of the first tooth of the lifting-plates E. The successive movements of the lifting-plates E, as above described, are then repeated, and the operation is continued until all the spaces between the teeth E of the lifting-plates are filled with billets, as shown in Figs. 1 and 2. At this point each successive cycle of movements will delivera billet upon an endless conveyer-chain F, moving transversely across the furnace and driven by asuitable driving mechanism. (Not shown.) The lowersection or loop of the chain F passes through a reservoir F of water, by which the chain is cooled. The side walls of the furnace are provided with openings G G, through which the billet is delivered by an endwise movement from the conveyer-chain F upon con veyer-rolls H upon one side of the furnace, or by reversing the movement of the chain upon conveyer-rolls H upon the opposite side of the furnace.

The operation of my mechanism for turning and advancing the billets at the delivery end of the furnace is as follows: A series of billets C is formed on the track C in the usual manner, the admission of each succeeding billet causing the series to be advanced the thickness of a billet until the billets reach the inclined section C of the track,

when the advancing billet falls upon the hearth D and is stopped in proper position on the hearth by the vertical side of the first tooth E of the lifting-plates E, as represented in diagrammatical view in Fig. 4:. The lifting-plates are then lowered into the position shown in Fig. 5. They are next moved forward in the direction of the arrow 1 into the position shown in Fig. 6. From the position shown in Fig. 6 the lifting-plates E are raised into the position shown in Fig. 8, the vertical motion of the lifting-plates turning the billet a one-quarter turn, as illustrated in Fig. 7. The lifting-plates are then lowered into the position shown in Fig. 9 and are next moved back in the direction of the arrow 2 into the position shown in Fig. 10. The lifting-plates E are again raised into the position shown in Fig. 11 with the billet a, inclosed in the first space between the teeth of the lifting-plates and with the lifting-plates in position to receive the next billet b in the series which is pushed upon the hearth D. The billets a, and b then occupy the position shown in Fig. 12, with the lifting-plates in the raised position, the same as shown in Figs. 4 and 12, when the cycle of movements of the liftingplates E is then repeated, moving the billets a and b along'the space of one toot-h and making room for the next succeeding billet of the series C and so on until all the spaces between the teeth of the lifting-plates are filled with billets, which are held apart by the teeth E of the lifting-plates E, as shown in Fig. 2. Each cycle of movements of the lifting-plates will then cause the advancing billet to be delivered upon the conveyor-chain F, and a fresh billet will be received upon the hearth D against the teeth of the lifting-plates. In my improved apparatus each of the liftingplates E is provided with five teeth E thereby causing the billets to be successively turned one-quarter turn by the vertical movement of each of the teeth E and finally be delivered upon the rotating conveyor-chain F and delivered through one of the openings in the side walls of the furnace either upon the conveyor-roll H or H, according to the direction in which the conveyor-chain F is moving.

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

1. In a billet-heating furnace the combination with a heating-chamber having a floor or hearth provided with an opening, of a billetturning mechanism arranged to move vertically through said opening and engage the ICC billet as it rests upon said floor or hearth, substantially as described.

2. In a'billet-heating furnace the combination with a heating-chamber and a longitudinal track for billets, of a hearth at a slightlylower levelthan said track, said track havingv openings for a billet-turning mechanism, and a billet-turning mechanism operating through said openings, whereby each of the billets is turned as it passes over said hearth, substantially as described.

3. In a billet-heating furnace provided with openings in the floor or hearth of the heatingchamber, of a vertically-reciprocating turning mechanism operating through said opening to turn a billet on said floor or hearth, substantially as described.

4. The combination with the heating-chamber of a billet-heating furnace having an opening in the bottom of said chamber for the introduction of a billet-turning mechanism, of a billet-turning mechanism comprising a verticallyreciprocating plate having teeth by which the billets are engaged and turned,

substantially as described.

5. In a billet-heating furnace the billetturning mechanism consisting of a verticallyreciprocating plate arranged to strike the under side of a billet, and by a lifting movement turn the billet, substantially as described.

6. In a furnace for heating billets the billetturning mechanism consisting of a verticallyreciprocating plate operating through an opening in the floor of the heating-chamber, said reciprocating plate having a series of teeth projecting above the floor of the furnace on the upward movement of said plate, whereby the billets are lifted by the ends of said teeth and turned, substantially as described.

7. In a furnace for heating billets, the com-' above the billet-supporting surface to form a stop for a billet as it falls over saidstep, means for depressing said plate to carry its teeth below the billetsupporting surface, means for moving said plate beneath the billet, and means for raising the plate to strike the under side of the billet and turn the same, substantially as described.

8. In abillet-heating furnace provided with an opening in the billet-supporting surface each billet is advanced along the billet-sup- 7o porting surface by the upward movement of said plate, substantially as described.

10. In a billet-heating furnace, the combination with the heating-chamber, of a billetsupporting surface, a reciprocating toothed plate having wedge-shaped teeth and located beneath said billet-s11 pporting surface, means for imparting to said plate rising-and-falling and forward-and-backward movements, whereby said teeth are made to turn and advance the billets, substantially as described.

11. In a billet-heating furnace the combination with a billet-supporting surface upon which the billets are moved from the admission to the delivery end of the furnace, of a conveyer by which the billets are moved transversely to the furnace and in alinement'with a delivery-opening, a vertically-reciprocating mechanism by which the billets are succes sively moved from said billet-supporting surface upon said conveyer, and means for actuating said reciprocating mechanism, sub stantially as described.

ELBERT H. oARRoLL.

Witnesses:

RUFUS B. FOWLER, M. M. SCHNERMANN.

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