US1643184A

US1643184A - Glass-drawing apparatus

Info

Publication number: US1643184A
Application number: US134444A
Authority: US
Inventors: Arthur E Spinasse
Original assignee: Individual
Current assignee: Individual
Priority date: 1926-09-09
Filing date: 1926-09-09
Publication date: 1927-09-20
Anticipated expiration: 1944-09-20

Description

A. E. SPINASSE GLASS DRAWING APPARATUS Filed Sept. 9, 1926 A 2 Sheets-Sheet 1 v 1,643,184 P 1927' A. E. SPINASSE GLASS DRAWING APPARATUS Filed Sept. 9, 1926 2 Sheets-Sheet 2 Patented Sept. 20,1927.

"1,643,184 UNITED STATES ,PATENT- OFFICE.

names. a. srma'ssn, or 110m vnan'on, OHIO. ems-nnawme nuance.

Application filed Septeniber 9, 1926. Serial No. 134,444.

The present invention relates to improvements in glass drawing apparatus and an object of the invention is to protect the glass bath and any apparatus therein from falling fragments of glass, which have been set or partially set in the sheet of glass being drawn.

This sheetof glass passes up out of the furnace through aleer and the margin portions of the sheet frequently break off and fall down into the bath of molten glass and upon parts of the apparatus, doing in ury to these arts and resulting in theidrawl'ng of imper ect glass. 0

The purpose of the invention 15 to interpose a barrier to the entrance ofsuch detached particleswhereby the glass bath at the drawing zone will be kept free of the particles and in condition to draw uniform and perfect glass:

With the foregoing and other objects 1n view, the inventlon will be more fully described hereinafter, and will be more particularly pointed out in'the' claims appended hereto.

In the drawings,-wh"erein like symbols refer to like or corresponding parts throughout the several views.

Figure 1 is avertical section through p ortions of a glass furnace and leer casing showing the improved device.

Figure 2 is a vertical section taken on the line 22 in Figure 1.

Figure 3 is a section taken on the line 33 also in Figural, and

Figure 4 is a fragmentary section on an enlarged. scale through the improved attachment. I

Referring more particularly to the drawings, 5 designates t e furnace roof and 6 the openin therein through whlch the sheet of glass, esignated at 7 is drawn upwardly from the bath of glass 8 in the furnace. This sheet is, according to some methods, drawn from the free or natural surface level of the glass bath, and according to other methods, through a slotted float.

The sheet 7 is received between the two sets of drawing rolls 9, 10 andll, 12 which shift the sheet upwardly in the act of draw ing the same. The rollers are already mounted on appropriate journals fitted in appropriate bearings in the walls of the leer casing 13. The journals of the

rolls

9 and 11 are provided with the

beveled gear wheels

14 and 15 which are disposed respectively in mesh with complementary

beveled inions

16 and 17 on a common shaft 18, w ich-is driven from any appropriate source of power. The opposite drawing rolls 10 and 12. have their trunnions supported in the depending arms 19 of bell crank levers which are fulcrumed at 20' upon the leer casing and have their companion arms 21 provided with the sliding 'weights 22 equipped with the set screws 23, by which the welghts may be adjusted along the arms 21. The weights tend to rotate the. bell crank levers about the fulcrum point 20 with the result that the attached rolls are urged against thedrawn sheet 7 and enough friction is! secured to cause the drawing upwardly of the sheet by reason of the opposite driven roll.

Inasmuch as there is a tendency for the margm portions or edges of the sheet to draw thick or head like, are reduced or tapered at dlcated at 24 in Figure thlckened edge portions would prevent the intermediate parts of the rolls from securin good contact with the body of the sheet and to th s extent would interfere with positive draw ng of the sheet.

It 1s found, however, that these tapered roll ends leave gaps between the-rolls at the thlckened edge portions of the sheet through whlch particles of the glass which break ofi their ends, as'in- 1; otherwise the from the edges of the sheet are enabled tofall into the glass bath 8 in the furnace to the 1n ury of the glass bein drawn. This falling glass oftentimes fa s upon the rethe drawing rolls.

fractory floats placed in the glass and these floats are broken or chipped, or otherwise ingured particularly along the walls throughw .ich the sheet is drawn, so that the sheet itself is improperly drawn and checks,

cracks and other blemishes occur.

According to the

invention rolls

25 and 26 are provided at a point to catch and divert the falling particles of glass into the

catch pans

27 and 28 provided to receive same upon the furnace roof 5 adjacent the furnace openmg 6. The

rolls

25 and 26 are both urged yieldably against the glass sheet 7.

7 wide and longer than the opening 6 in the furnace roof, so as to adequately protect the drawing zone from the falling particles.

Due to the rounded peripheral surfaces on the

rolls

25 and 26 the falling glasss particles will be diverted away from the sheet and into the

catch pans

27 and 28. Y

As shown in Figure 3, the

rolls

25 and 26 may be carried directly upon the lower ends of the swinging

arms

31 and 32 pivoted upon a common pivot pin or hanger 33 upon the leer wall 13 or othersupport.

The

arms

31 and 32 will diverge downwardly as the pivot or fulcrum point 33 is arranged axially in substantially the same plane with the drawn sheet 7. The result is that the

rollers

25 and 26 by their own weights, will exert a yielding pressure in opposite directions upon opposite surfaces of the. glass sheet. v i

In Figure 4 a preferred construction of the

rollers

25 and 26 is shown in which these rollers are indicated to be constructed of a solid body of wood, metal or other material 34 mounted upon the square or other shafts 35 and having an outer covering or shell 36 of some soft yielding or resilient material, such assemtsoft asbestos, which is also refractory. Such yielding surfaces enable the rolls to press firmly upon the sheet without producing lines or blemishes therein, and at the same time permitting the rolled surfaces to conform to the varying irregularities in the drawn sheet on both sides of the sheet, whereby no gaps will be left for the passage of falling glass particles.

The glass catching

rolls

25 and 26 may be placed at any appropriate point but preferably at the point where the glass becomes set. For instance these

rolls

25 and 26 may be placed above the drawing rolls or between the pairs of drawing rolls if desired.

It is obvious that various changes and modifications maybe made in the details of construction and design of the above specifically described embodiment of this invention without departing from the spirit thereof,

such chan es and modifications being restricted o y by the scope of the following claims.

What is claimed is:-

1. In glass drawing apparatus, drawing means for drawing and preserving the alinement of the sheet, and auxiliary rolls in addition" to the drawing means yieldably pressed against opposite sides of the sheet and positioned to divert falling particles of the glass sheet.

2. In glass drawing apparatus, drawing rolls for drawing the glass sheet, and auxiliary non-driven rolls in yieldable contact with the glass sheet including the border portions thereof and rotated by the moving sheet.

3. In glass drawing apparatus, rigidlymounted positively-driven drawing rolls, yieldably-mounted drawing rolls opposite said rigidly-mounted rolls for forcing the glass sheet against said rigidly-mounted rolls, and auxiliary rolls yieldably-mounted at opposite sides of the sheet to press upon the sheet and be moved thereby to divert fallin glass.

4. n glass drawing a paratus, a container for a bath of molten g lass, drawing means thereabove for drawing glass sheets from the bath, and rolls independent, of said drawin means and between the drawing means an said bath for yieldably "pressing against opposite sides of the glass sheet.

5. In glass drawing apparatus, a container for a bath of molten glass, drawing rolls in contact only with the intermediate portion of the sheet between the border portions thereof, and independent rolls in yielding contact with the border portions of the sheet above the bath.

6. In a paratus for drawing sheet glass with bor or portions of greater thickness than the intermediate portion of the sheet, a container for a bath of molten glass, drawing rolls in contact only with the intermediate portion of the sheet between said border portions of greater thickness, and independent rolls positioned to contact with said sheet border, portions of greater thickness.

In testimony whereof I aifix my signature.

ARTHUR E. SPINASSE.