US2608029A - Apparatus for tempering curved glass sheets - Google Patents

Description

Aug. 26, 1952 GLYNN 2,608,029

APPARATUS FOR TEMPERING CURVED GLASS SHEETS I Filed June 24, 1947 grwa/wbo b Tnzpookz WILIJAM GLYNN Patented Aug. 26, 1952 APPARATUS FOR TEMTERING CURVED GLASS SHEETS Theodore W. Glynn, Kingsport, Tenn, assignor to Blue Ridge Glass Corporation, Kingsport, Tenn., a corporation of New York Application June 24, 1947, Serial No. 756,719

2 Claims.

1 This invention is directed to an apparatus for tempering curved sheets of glas and involves means for preventing the distortion or flattening of the curved sheet during heating and during tempering, as well as means for applying jets of cooling air to the hot sheet for tempering it.

For the purpose had in mind the curved sheet is supported at its straight edges during the heating and cooling and air nozzles to direct air jets on the curved side of the sheet are mounted for movement around a center located below and on the concave side of the sheet so as to be capable of being oscillated out of the way of the sheet supports during the movement of the sheet into cooling position.

Referring to the accompanying drawings, in which corresponding arts are designated by corresponding marks of reference- Figure 1 is a side elevation of an apparatus embodying and adapted to carry out my invention.

Figure 2 is a vertical cross section on lines X X of Figure 1. r

The heating furnace may be of any improved construction and has located therein and projecting through the charging door 2 thereof the rails 3 formed by hollow pipes which may be cooled by air or Water circulating therethrough. Each rail is loosely surrounded by a sleeve 4 slidable thereon and of at least the length of the sheet to be treated. The sleeves for the purpose of giving them flexibility have cuts 4a formed at intervals around their periphery and are provided at intervals with notches 4b on their upper surfaces.

The sleeves are bridged at short intervals by the rest 5 of metal having serrations 511 on their upper edges, the rest being partially seated at their ends in the notches 4b of the sleeve.

Located centrally below the rest 5 and outside of the heating furnace is the blast trunk 6 having nozzles 6a projecting radially from one segment thereof at intervals along its length. The trunk may be oscillated by the handle 6b around its axis, this being permitted by the packed joint 60 and is fed by air supply pipe 6d.

Located above the blast trunk is the curved blast hood 1 having the downwardly projecting sleeves moved along the rails to the outside of the furnace to the temperingstation, i. e., to above the rotating blast trunk, it being stopped at a position where the rests are located vertically above the spaces between the blast 6a, the trunk being at such time rotated to a position shown in dotted lines in Figure 2. The trunk is then rotated to the position shown in full lines and air is turned on and caused to issue through the blast nozzles to chill and therefore temper the sheet.

Having thus described my invention, what I claim and desire to secure by United States Letters Patent is:

1. In an apparatus for tempering curved glass sheets, the combination with a heating furnace, rails extending from within the furnace to the exterior thereof, sleeves loosely fitting and movable lengthwise of the rails horizontal, transverse members carried by the sleeves having serrated upper edges adapted to receive the edges of the curved sheet resting thereon and having means for preventing theseparation of the edges of the sheet and means located on the outside of the furnace for directing air on the heated sheet when removed from the furnace.

2. In an apparatusfor tempering curved glass sheets, the combination with a heating furnace,

rails extending from within the furnace to the exterior thereof, sleeves moving on the rails, horizontal transverse members carried by the sleeves and extending from sleeve to sleeve, a rotatable air trunk below the transverse members when outside of the furnace having nozzles thereon projecting when the trunk is in one position above the levelof the said members and jets located above the sheet when on the outside of the furnace.

THEODORE W. GLYNN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,454,200 Wells et a1. May 8, 1923 1,809,534 Tillyer et a1. June 9, 1931 2,376,872 Harris .....1 May 29, 1945 2,409,284 Jackson Oct. 15, 1946 FOREIGN PATENTS Number Country Date 393,491 Great Britain June 8, 1933 829,655 France June 4, 1938

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