US1165585A - Leer. - Google Patents

Description

J. H. FOX.

LEER.

APPLICATION FILED JULY 6, 1911.

Patented Dec. 28, 191.5.

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LEER,

APPLICATION FILED lULY 6. 1911.

Patented DEB. 28, 1915.

2 SHEETS-SHEET 2.

WITNESSES IPJVENTOR UNITED STATES PATENT @FFTGE.

JTQHN H. F 2, 0F 'JPITTSBURGH, PENNSYLVANIA, ASSIGNOR T0 PITTSBURGH PLATE GLASS CUMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENN- SYLVANTA.

To all whom it may concern Be it known that T, JOHN H. FoX,-a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have made certain new and useful Improvements in Leers, of which the following is a specification.

The invention relates to leers through which plate and other glass may be passed to secure proper annealing thereof. The invention has for its primary objects; the provision of a leer having improved means whereby the temperature along the length of the leer may be regulated; the provision of improved means for securing a gradual reduction in temperature along the length of the leer; and the provision of a temperature regulating arrangement whereby the length of the leer may be materially reduced. Certain embodiments of the invention are illustrated in the accompanying drawings, wherein Figure 1 is a'partial longitudinal section through one form of apparatus, Fig. 2 is a section on the line Tl[l[T of Fig. 1; Fig. 3 is a longitudinal section through a modified form of construction; and Fig. 4 is a section on the line TV-TV of Fig. 3.

As shown in Figs. 1 and 2; 1 is the brick or masonry construction forming the body portion of the leer; 2 is the annealing chamber extending longitudinally of the leer, and through which the glass plates are carried from one end of the leer to the other in the direction indicated by the arrows inFig. 1; 3 is a diagrammatic showing of a transfer mechanism consisting of bars, but which may be of any approved form for glvlng the glass its step-by-step movement through the annealing chamber; 4: represents the sheets or plates of glass carried by the transfer mech anism; 5 are the heating fiues beneath the annealing chamber, which flues may be of any approved type; 6 is a cooling passage way or flue, which passage-way is separated from the annealing chamber by the metal wall 7, preferably of sheet metal, although any other suitable material might'be used; and 8 is a fan for forcing air through the passage-way 6 in the direction indicated by the arrows.

The flue or passage-way 6 is divided up into a plurality of sections by means of the division walls 9 as indicated in Fig. 2, and each of these smaller fines is provided with Specification of Letters Eatent.

Fatented Dec, 28, 1915.

' Application filed July 6, 1911. Serial No. 637,147.

the dampers or valves 10, 11, 12 and 13. ltach of the sections of the cooling passage way 6 1s provided with plurality of outlet passages 14, 15, 16, 17 and 18 leading into outlet chambers 19 (Fig. 2), each provided with a stack 20 in which is a valve 21. The separate outlet passages 14, 15, 16, 17 and 18 are also preferably provided with the controlling valves or dampers 22, 23, 24K, 25 and 26.

ltt will be seen from the foregoing that the amount of cool air passing over any section of the annealing chamber and through any portion of the cooling flue or passage-way 6 may be governed and controlled, the principle of the apparatus, involving of course, the gradual decrease in the cooling effect produced by the circulation from the forward or right hand end of the leer as shown in Fig. 1, to the other end thereof, so that the glass as it passes forward through theleer is gradually brought to a lower and lower temperature. The valves or dampers 10, 11, 12 and 13, when operated in conjunction with the valves 22, 23, 24, 25 and 26, serve to regulate the quantity of air passing through any section of the fines 6, as the closing of any valve in-a passage 6, such as the valve 11 combined with the opening of the valve 23 in the outlet 15, serves to cut down the amount of air flowing through the flue forward of the valve 11, such air passing out through the outlet 15. The cooling effect of the air as it progresses through the passageway 6, is also reduced by reason of the fact that it becomes heated during its progress through the passage-way. It will be understood that the arrangement shown in Figs. 1 and 2 is largely diagrammatic, and that the number and location of the outlets might be considerably modified, as well as the arrangement of valves, and furthermore, that the position of the cooling passageway 6 with respect to the annealing chamber 2 might be considerably changed or modified to suit conditions. The circulation of air is preferably secured by means of fans, but any other suitable means for causing a flow of air through the cooling passage-way might be employed.

In Figs. 3 and i, a slightly modified construction is illustrated. In this arrangement, the construction is precisely the same as that shown in Figs. 1 and 2, and heretofore described, with the exception that the stack portions 20 all lead into the return flue 27, which has at its right hand end the suction fan 28 to assist in securing a circulation of air. The only difference in operation of this apparatus from that of Figs. 1 and 2 is, that the suction fan cooperates with the fan 8 in securing a vigorous circulation of air, instead of all the work being done by the fan or blower 8. The description and reference numerals applied to the apparatus of Figs. 1 and 2, apply equally well to the apparatus shown in Figs. 3 and 4.

Having thus described my invention and illustrated its use, What I claim as new and desire to secure by Letters Patent is the following 1. In combination in a leer having an elongated annealing chamber, and means for carrying glass therethrough, a passage-Way extending along the said chamber, means for causing a flow of air through the saidpassage-way, and a plurality of valves arranged along the passage-way with outlets adjacent thereto whereby the quantity of air flowing through the various portions of the passageway may be regulated.

2. In combination in a leer having an elongated annealing chamber, and means for carrying glass therethrough, a passage-way extending along the said chamber and provided with a series of outlets along its length, valves in the said outlets, and valves in the passage-way adjacent the said outlets, and means whereby air is circulated through the passage-way in a direction opposite to the direction in which the glass moves through the leer.

3. In combination in a leer having an elongated annealing chamber and means for carrying glass therethrough, a heat conducting top wall for the chamber, a plurality of cooling passages arranged side by side and extending longitudinally of the said top wall, means for causing a flow of air through the said passages, and means whereby the flow through the passages may be regulated.

4. In combination in a leer having an elongated annealing chamber, and means for carrying glass therethrough, a passage-way extending along the said chamber, a metal partition between the passage-way and said chamber, and means for causing a flow of air through the said passage-way in a direction opposite to that of the movement of the glass.

5. In combination in a leer having an elongated annealing chamber, and means for carrying glass therethrough, a passage-way extending along the said chamber, a metal partition between said chamber and the passage-way, means for causing a flow of air through the said passage-way in a direction opposite to that of the movement of the glass, and means for decreasing the quantity of air flowing through the successive portions of the passage-Way.

6. In combination in a leer having an elongated annealing chamber, and means for carrying glass therethrough, a passage-way extending along said chamber, a metal partition between said chamber and passageway, and means for causing a flow of air through said passage in a direction opposite to that of the movement of the glass, the said passage-way being so arranged that the quantity of air flowing therethrough is diminished from the front end of the passage-way to the rear end thereof.

7. In combination in a leer having an elongated annealing chamber, and means for carrying glass therethrough, a heating passage-Way extending longitudinally below the annealing chamber, a cooling passage-Way extending longitudinally above the annealing chamber, a metal partition separating the cooling passage-way and the annealing chamber, and means for causing a flow of air through said cooling passage-way in a direction opposite to that of the movement of the glass.

8. In combination in a leer having an elongated annealing chamber provided with a metal top wall and having means for carrying glass therethrough, a cooling passageway above the said metal top wall extending longitudinally of the leer, means for causing a flow of air through the passage-Way in a direction opposite to that in which the glass moves through the leer, and means whereby the quantity of air flowing through the successive portions of the passage-way is governed.

In testimony whereof I have hereunto signed my name in the presence of the two subscribed witnesses.

JOHN H. FOX.

/Vitnesses M. PrroArRN, R. W. MCCABE.

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