US1248478A - Casting-table. - Google Patents

Description

W. J. GOLIGHTLY.

CASTING TABLE. APPucnnoN HLED mm 22, m2 RENEWED MAY 15.

Patentefl' Dee. 4,1917.

Bil f7 @NVENTOR. flay it I I CASTING-TABLE.

Specification of Letters Patent.

Application filed June 22. 1912, Serial No. 705.180. Renewed May 15, 1916. Serial No. 97,729.

To all whom it may-concern:

Be it: known that 1, 11.11.01 J. Go- Lion'rLY. a citizen of the lfuited States, rcsidingat liokomo, in the county of lloward and State of Indiana. have invented certain new and useful improvements in (lasting- Tablcs, of which the following is a speciti' cation.

This invention relates to casting tables used in the manufacture of plate glass and the like, and it has for its primary objects; the provision in a casting table of improved means for preventing warping and distortion of the table, thereby securing a product of substantially uniform thickness: and the provision in a sectional casting table of an improved arrangement of fastening and cooling means, together with the preventing distortion of the table. These, together with such other objects as may hereinafter appear, or are incidental to my invention, I attain by means of a construction which I hate illustrated in preferred form in the accompanying drawings, wherein s Figure 1 is a perspective view of a casting table embodying my invention, portions of the table being broken away to more clearly disclose the parts; and Fig. 2 is a section through part of the table drawn on an enlarged scale. V J

In casting plates of glass, it" has been found that the heat of the glass metal expands the upper portion of the casting table and causes the table to warp. This warping usually takes the form of bowing up of the central portion of the table, and when the glass metal is rolled into plate form, the plates are thin in'tho middle and thick at the edges. My invention is primarily intended to overcome this objection and se cure a better grade of product and reduce loss to a minimum.

Referring-to the drawings, it will be seen that my improved casting table is con'lpose'd of a plurality of sections 7 which are bolted together at various points throughout their length by rods 8 and nuts 9, the apertures 10 for receiving the rods 8 beinglocated in the lower portion of the sections for a purpose which will hereinafter appear. In order to secure the sections in proper position with relation to each other, I provide each section with keyways 11, there being one keyway on each side of a section. A .pli1' means for 1 ralit-y of keys 12 are placed in the keyways and serve to keep the sections in alinement with each other. The sections are cooled by means of steam, water, or other cooling agent, which is circulated through the pipes 13, of which there are four to a section, the pipes being located in apertures ll formed in the sections slightly above the censral portion thereof in substantially the same plane as the keyways 11. From inspection of Fig. 2, it will be noted that the width of the sections at the top is less than the width at the bottom. and there is ,thus provided a narrow slot 15 betweeiTach sect-ion extending from the keyways. to the upper surface of the sections and throughout the length of the sections. In the drawings, the width of the slots has been exaggerated for purposes of illustration.

From the foregoing. it will be readily apparent that the upper portions of the sec. tions may freely expand as they absorb heat from the hot glass metal being cast androlled, and that the lower portions of the sections will be in etl'cct insulated from the heat by the circulation maintained in the pipes 13 The provision of the longitudinal slots 15 in the upper surface of the table permits the upper portions of the sections to expand without causing bowing or other distortion of the table. This arrangement is very advantageous for it is not practicable to cool the upper surface sutiiciently to prevent warping from expansion and at the same time avoid cracking from the extremes of heat .ind cold which would be present in such cooling arrangement. The importance of securing a glass plate of as nearly uniform thickness as possible is especially great in the manufacture of plate glass where, by the usual grmdmg process the plate has to be reduced to accurately uniform thickness and of course much less grinding will be required if the rough plate before grinding more nearly approximates the finished dimensions. A further advantage of the con structionsis that thetable is very rigid and. securely bound together, while at the same time adequate provision is made for expansion and contraction of the upper part of the table. This is obtained by the arrangement and location of the circulating pipes with respect to the keys and binding rods. Other advantages will occur to those familiar with the art.

Patented Dec. 41, 191W.

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lltitl lilltl Having thus described my invention and illustratedits use, what I claim as new and desire to secure by Letters Patent is the following:

l. 1& casting table comprising a plurality of sections.which abut each other at their lower portions and are, spaced away from each other at their upper portions, means for binding the lower portions together, and means for insulating the lower portions of the sections from the action of the heat from above.

2. A casting table e'omprising a plurality of sections which abut each other at their lower portions and are spaced away from each other at their upper portions, means for binding the lower portions together, and means for insulating the lower portions of the sections from the action of the heat from above, said means being located in the sections above the binding means.

' 3. A casting table comprising in combination a plurality of sections placed side by side, means for binding the sections together 2% so that their vertical edges abut one another,

and slots between the sections at the upper portions thereof adjacent the vertical edges whereby free expansion and contraction of the upper portion of the table is permitted.

-4. A casting table comprising in eombination a body portion ha ing a plane casting surface, and a plurality of slots ofgreater depth than Width extending across the casting surface from end to end of the table in substantial parallelism whereby the upper portion of the table between lllOl slots can expand and contract freely without llexing the bottom portion of the table when the temperature of the upper portion varies with that of the lower portion. 5. A casting table comprising in combination a body portion having a plane casting surface integral therewith. and a plurality of slots of such width that the glasswillnot flow into them, extending over the casting surface of the table whereby the upper portion of the table between the slots can expand and contract freely without flexing the bottom portion of the table when the temperature of the upper portion varies with respect to that of the lower portion.

(3. A casting table comprising in combination a. body portion having a plane casting surface integral therewith, and a plurality of slots of greater depth than width extending over the casting surface whereby the upper portion of the table between the slots can expand and contract freely without flexing the bottom portion of the table when the temperature of the upper portion varies with respect to that of the lower portion.

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

WILLIAM J. GOLIGHTLY. Witnesses:

J. E. CHANDLER, EARL B. BARNES.

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