US1045901A

US1045901A - Glass-drawing apparatus.

Info

Publication number: US1045901A
Application number: US46826108A
Authority: US
Inventors: Harry G Slingluff
Original assignee: Pittsburgh Plate Glass Co
Current assignee: PPG Industries Inc
Priority date: 1908-12-19
Filing date: 1908-12-19
Publication date: 1912-12-03
Anticipated expiration: 1929-12-03

Description

H. G. SLINGLUFF.

GLASS DRAWING APPARATUS.

APPLICATION FILED DEO.19, 190s.

Patented Dec.3,1912.

WITNESSES pnrrnn s'rrrrns HARRY G. SLINGLUFF,- OF MOUNT VERNON,

rn rnnr orrron OHIO, ASSIGNOR TO PITTSBURGH PLATE SYLV'ANIA.

7 Specification of Letters Patent.

GLASS DRAWIN G APPARATUS.

Patented Dec. 3, 1912.

Application filed December 19, 19(18. Serial No. 468,261.

To allwhom it may concern.

B e it known that I, HARRY G. Smnonurr, acltlzen of the-United States, residing at Mount Vernon, in the county of ITlOX 2tI1Cl State of Ohio, have invented certain new i,

and usefullmprovements in Glass-Drawing Apparatus, of which the following is a specification.

The invention relates to. apparatus employed in drawing glass, and particularly to means for securing a proper temperature t in the upper portion. and neck of glass cylinders during drawing. The invention has for its primary objects; the provision of an improved means of the character specified wherein the heat for the hood employed is 1 applied from the molten glass itself; and the provision of improved means whereby the hood tor,- surrounding the neck of the cylinder is automatically operated and withoutinterference with the bait or the cylinder being drawn. One embodiment of the invention is illustrated in the accompanying drawings, wherein Figure 1 is a diagrammatic front elevavation of the apparatus, with the bait in the position at. which the drawing starts,

Figure 2 is a similar view, but with the cylinder partially drawn,

Figure 3 is a side elevation of the apparatus as shown in Figure '2, I

Figure 4 is an enlarged detail section taken on the line IV-IV of Figure 3,

Figure 5 is an enlarged detail section through the heating annulus or hood, and through the means for supporting such hood,

Figure 6 is an enlarged detail section at the lower end of the supporting guide rod,

Figure 7 is a plan View of the stop bar, and

Figure 8 is an enlarged rear View of the mechanism for automatically opening the heating means or hood when it reaches its upper position.

Briefly stated the device comprises a metal hood which is mounted to move with the bait during the drawing operation, and is designed during the starting operation to rest adjacent the glass and be heated to a high temperature. The heat thus stored in the annulus or hood is subsequently radiated against the upper portion and neck f th cylinder as it is drawn, maintaining {the glass at a higher temperature than 1 would otherwise be the case, which condition results in less breakage at this point, due to rapid cooling, and greatly facilitates f the drawing of long-cylinders. A lost inoition connection is provided with the carriage of the bait, so that the hood is auto.- matically stopped at the desired position" above the surface of the molten glass. A

tomatic means are also preferably supp.

upper position, so that the cylinder and the i bait may be withdrawn laterally without inl terference with the hood.

Referring to the general arrangement of Figs. 1, 2 and 3, 1 is a body of molten glass from which the drawing is to take place; 2 is the bait provided with the hollowhandle 3 for the admission of air; at is the reciprocatory carriage to which the bait is secured by means of the fork 5, (Fig. 3) 6 is an air cylinder having connection with the end of the bait by means of the pipe 7; 8 is a pipe by means of which air is supplied to the cylinder 6; 9 are the guides upon which the carriage 4: travels; 10 is the cable by means of which the carriage is moved upward; and 11 is a vertical rod (Figure 3) secured to the carriage and upon which the hood is mounted in a manner which will now be described.

The hood is made in two sections 12 and cylinder as indicated in Figure '2, and composed of iron or other material capable of retaining heat for a considerable period. The

sections

12 and 13 are provided with upwardly extending brackets brackets are mounted upon bars 14 and 15. The bars 14 and 1.5 are mounted respectively upon the collars 16 and 17 (Fig. 6) carried by the rod 11, and their rear ends are extended to form the handles 18 and 19 by means of which the sections may be spread apart.- The collars 16 and 17 are not mount ed directly upon the rod 11' but arepivoted upon the collar 20 and are neldin position thereon by means of the nut 21. pivotal to the position indicated. Figure 1, a

sections

12 and 13 for opening the hood when it reaches itscia sliding connection is thus made between the.

13 shaped to fit about the upper end of the V 12', which to rest upon brackets 23 secured to the guide 9. .A rod 22 passes through the lower end of the rod 11 and is locked in position by the nuts 22 as indicated in Figure 6. The front end 22 of this rod is forked and is adapted to engage the handle of the bait and steady it. It will be seen that when the hood sections and the collar 20 reach the position of Figures 1 and 6, the stop bar 22 is arrested by the brackets'23, and the lower end of such collar rests upon the stop bar 22, thus maintaining the hood in position above the glass, while the bait, its steady bar 22 and the bar 11 are free to descend so that-the bait contacts with the glass. The

sections

12 and 13 maintain the position indicated in Figure 1, until the bait reaches the position'indicated in Figure 2, at which time the nuts 22 on the rod 22 (Fig. 6)

engage the lower end of the collar 20, and the sections are carried upward at the same rate of speed as the bait and the cylinder attached theretol their lowermost positions they become heated to a very high temperature, due to their proximity to the molten glass. They may be spread apartif desired, to expose them more thoroughly to the heat from the glass below. A certain amount of this heat is retained throughout the drawing process, as the sections are made of heavy iron, and by their radiation the neck and upper portion of the cylinder are maintained at such a temperature that a long cylinder may be drawn without danger of breakage. VVhe'n the extreme point of draw is reached, the handles 18 and 19 are engaged by'the forked member 24, (Fig. 8), which forked member cams the handles toward each other, thus spreading the

sections

12 and 13 apart sufliciently to permit the lateral passage of the bait and cylinder support thereby.

Theupper edges of the

sections

12 and 13 are preferably turned inward about the handle of the bait as indicated in Fig. 5 so that an upward passage of air between the sections and cylinder is prevented, and the heat fr0m the sections is maintained about the neck of the cylinder being drawn.

It is obvious that the shape and construction of the hood might be considerably modified without departing from the broad invention involved. The lower edge of the hood might be extended up or down within 6 glass member being drawn which is adjacent While the sections are inbait, 'and supported independently thereof and automatic means for opening the hood during its upward movement.

2. The combination with a bait and. carriage therefor for drawing glass cylinders, of'a vertical supporting rod upon the carriage, a metal hood member for the upper portion of the cylinder mounted slidably on the rod, and means for stopping the downward movement of the said member adjacent the surface of the glass from which the drawing occurs.

3. The combmation with a bait and carriage therefor for drawing glass cylinders,

of a vertical supporting rod upon the car-- riage, a pair of metal members for encircling the upper portion of the cylinder slidably and pivotally mounted on the rod, and means for stopping the downward movement of the said members adjacent the surface of the glass from which the drawing occurs.

4:. The combination with a,bait and carriage therefor for drawing glass cylinders, of a vertical su porting rod upon the carriage, a pair 0 metal members for enc rcling the upper portion of the cylinder slidably and pivotally mounted on the rod and having rearwardly projecting handles and means for stopping the downward movement of the said members adjacent the surface of the glass'from which the drawing occurs.

5. The combination with a bait and carriage therefor for drawing glass cyhnders, of a vertical supporting rod upon the carriage, a pair of metal members for encir- 1 means for stopping the downward movement of the said members adjacent the surface of the glass from which the drawing occurs, and camming means for engaging the said handles and spreading the sald members apart during the upward movement of the carriage.

6. The combination with a bait and carriage therefor for drawing glass cylinders, of a vertical supporting rod upon the carriage, a pair of hinged metal members for encircling the upper portion of the cylinder slidably mounted on the rod, means for stopping the downward movement of the members at a predetermined point during the upward travel of the bait. I v

7. In a device of theclass. described, the combination with a carriage, of a removable blow-pipe on said carriage, a hood on said carnage, and means for man1pulat1ng'sa1d hood toward and from'said blow-gipe.

; 8. In a device off the class described, the

combination with a carriage, of a blow pipe on said carriage; a hood on said carriage;

and automatic means for manipulating said hood toward and from said blow-pipe.

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

' H. G. SLINGLUFF.

Witnesses: J. O. BRADLEY,

.ARCHWORTH MARTIN.

copies ofthis fiatent maybe obtained for five cents' each, by addressing the Commissioner of Patents, Washington, I). C.