USRE12427E - George h - Google Patents

Description

'GEORGE H. HARVEY, OF GLENFIELD, PENNSYLVANIA, ASSIGNOR, BY

MESNE ASSIGNMENTS, PITISBURG, PENNSYLVANIA', A

TO .BROWNSVILLE GLASS COMPANY, OF

CORPORATION OF PENNSYLVANIA.

GLASS-DRAWING MACHINE.

Original No. 772,510, dateriOctoher 1B,

Specification of Reissued Letters Patent.

nissued Dee. 26, 190s.

1904. Application for reissue {iled November 12, 1904. Serial No. 232,548.

To @ZL whom, it may con/cern:

Be it 1known that Ll GEORGE H. HARVEY, a citizen of the United States, residing in Glenlield borough, in the county of Allegheny and State of Pennsylvania,have invented or discovered new and useful Improvements in Glass- Drawing Machineacf which the'followingis a( specification.

In the accompanying drawing the .view showsa portion of a giass-d rawing machine in` vertical section. f

The object of my invention, generally stated, is to provide means whereby glass sheets in hollow form can be drawn from a receptacle which is unobstructed by'ainpassagestherethrough and also means for preventing a circulation of air throughout the interior of the gatherer.

, In the form of gathererin use at present the air-supply intended to prevent the cylinder of glass from collapsing is discharged through a pipe connected to the gatherer. The circulation is very irregular', and after the gatherer has risen from within the orilice formed by the cooler the gathering edge generally cools off, its cooling being hastened by the circulation of the air-current through the gatherer and out the escape-port. It is evident `that the chilling and the consequent contraction of the gatherer will cause the pendent glass cylinder to crack off and drop from the gatherer, thus not only ruining the draw of glass, but also endangering the operatives and thc machine.

Accidents of this nature frequently occur, and

it is my object to prevent the same, as will more clearly appear from the detailed description belowand the accompanying drawing, which, however, are'merely illustrative of the vprinciples of my invention ,ingeneralg Referring now to the drawirig for a detailed description of my invention, 1 designates the glass, which is in a plastic orserniplastic condition. It is contained in a holder 2 of any preferred design. An annular cooler 3 sits ,on the holder 2 and' has an annular chamber 4, to which is connected the inlet-pipe 5 and theoutlet-pipe 6 for theadmission and discharge of a coolingmcdium for the exterior surface `of thecylinder, if the same be em- -ployed The gatherer 7 has the eyes 8 orothcr suit-- able means for attaching the mechanism (not shown) for raising and lowering the gatherer'.

' I fu the orifice Si in the gatherer-is the pendent tube 10, which has the piston^11 secured to der 12.

13 is the inlet-pipe through which pressure is applied to the under side of the piston 11. The tube 15 passes through the tube 10, but is somewhat' smaller, so that a passage 16 is formed between the tubes 10 and 15. upper end of the cylinder has an orifice 14, which is larger than the tube 15.

, 17 represents a deiiector supported by a ing 18, said lug being secured at the lower end vof tube 15 by means of a rivet 19. The body ofthe dcliector is shown as a disk with its upper surface inclined downwardly to direct the cooling iiuid toward the a'pex of `the draw or place where the cylinder issues from the bath 1.

20 and 21 representJ annular rings, which are rigidly secured to tubes 10 and 15 and have ports 2Q and 23 passingthrough them.

Above the cylinder 11 is located a second cylinder 24E, which has an inlet25 andan airvent 26. A piston 27, rigidly secured to the tube l5, has a vertical'movement in said cylthrough the cylinder 24 and a flexible pipe is secured thereto. This pipe is connected tb a source of -gaseous supply and has suicicnt slack to permit the required travel of the tube 15 without detaching the flexible pipe. from said tube.

suming that the glass 1v in the receptacle 2 is in a condition suitable for drawing in hollow form and thata cooling medium is circulating through the chamber 4: of the cooler 3, the operator then lowers the gatherer 7 by'suitable means (not shown) secured to the eyes 8, into the orifice formed within the annular cooler 3 and until the rim ofthe gatherer'7 is immersed in the glass 1. After the glass atlheres thereto the gatherer 7 is raised at a speed best suited to cause the pendent glass adhering thereto to be raised therewith and of. a uniform thickness. A current of gaseous fluid under pressure passes down through tube 15 and is discharged against the deliector 17, which causes the current to be deflected laterally toward the line of juncture of the walls of the cylinder of glass and the glass `contained in the receptacle, thereby prevent- The inder. The upper endof tube 15 extends rl`he general operation is as follows: As-

the upper end and having travel in the cylin-f IOO ' and 23 out into the space Within, the cylinder 12 above the piston 11 and thence into the 10 and 15 after the gatherer' passes fromwith- ,sus

ing ripples or creases inthe body ofthe glass contained in the receptacle, which would occur if no means were provided to deiiect the gaseous duid laterally as it is discharged from the tube. By the use of the dei'ector the tubel is enabled to discharge its duid close to the glass contained in the receptacle, which aids in preventing the glass cylinder from contracting at its base. After the cylinder is filled with gaseous Huid the surplus passes up through the passage 16 and through ports 22 open air. lt is to be understood that as the cylinder of glass increasesy in length during the process of drawingthe volume of gaseous Huid within the draw is increased. After the gatherer 7 and the pendent glass adhering thereto have been drawn up the predetermined height the pendent glass is ready to be severed from the glass contained in the receptucle. As will be noted, there is no direct circulation of gaseous iuid around the intey rior oli'r the gatherer 7 as would occur if the discharge were directly through the gatherer instead of pendent tube 10. Thus I forni a cushioning` of the gaseous pressure in the gatherer and above the lower extremities of tubes out the orifice formed by the annular cooler 3, and as the heat rises from the glass in the receptacleinto the interior of the draw it is collected in this cushioning-space and tends to keep the gatherer from chilling and contracting, which Would'otherwise result in the pendent glass breaking ofi atits junction with the gatherer. Before the glass is detached from the gatherer and after the draw is iinished the operator perinits a.'y Huid under pressure to pass, through pipe 13, then into cylinder '12, and discharge below the piston il.' which` causes said piston to travel upwardly, carrying with it the tubes 10 and 15` and also thefpiston 27. After the tubes and deector have cleared the top of the gatherer 7 the gatherer and glass can be removed, yas desired, from alinerne'nt with the tubes .and another gatherer substituted. The operator then releases the pressure from under piston j 11 and permits a iuid under pressure to pass through pipe 25, then to cylinder 24, and discharge abovethe piston 27, which causes the piston 27 to travel downward, thereby. lowering the tubes 10 and 15 and the deector 17'..

through the orifice 9 and the gatherer 7 and leaving' there in position for the next draw, while the pistons have resumed their former positions.

That I claim is- 1. In the manufacture of glassja receptie cle, a ,gatherer having' an outlet therefrom, a

vpendent tube in said gatherer and a deiiector F. N. BARBER, A. M `STEEN.

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