US813290A - Glass-drawing machine. - Google Patents

Description

No. 813,290. PATENTED FEB. 20, 1906. G. H. HARVEY. GLASS DRAWING MACHINE. APPLICATION FILED Mum, 1904.

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GEORGE H. HARVEY, OF GLENFIELD, PENNSYLVANIA, ASSIGNOE, BY

UM'ESNE ASSIGNMENTS, TO BROWNSVILLE GLASS COMPANY, OF. PITTSBURG, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

GLASSrDRAWENG MACHINE.

I To all]; whom it may concern:

, which the following is a specification.

' In the accompanying drawings, Figure I is a vertical section of a portion of-a glass-drawing machine, and FigHlI is a reverse plan View of a portable heater .used in connection therewith.

The object of my invention, generally stated, is to provide preferably portable -means for rehea tin the gatherer and its pendent glass, as wi 1 ap ear from the more detailed description whic follows, reference being had to the drawings, which are, however, merely illustrative of the general prin' ciples of my invention.

Glass 1 in a liquid or semiliquid condition is contained in receptacle 2, which receptacle may be of any desired design.

3 represents 'acooler having an annular chamber 4, inlet-pipe 5, and an outlet-pi e 6 for the admission and discharge of a cooling medium, such as a liquid or fluid.

7 is a gatherer having eyelets 8 or other suitable means for attaching the hoisting mechanism (not shown) used for raising and lowering the same. 9 is an orifice through which a pendent tube 10 passes. 11 is an exit-port in said gatherer. A projection preferably encircles the gatherer 7 and is preferably integral therewith.

13 represents a portable heater used for reheating the gatherer and is referably composed of two sections hinge together at 14 and capable of being locked together at 15 and also havin flanges 16, whic engage the projection 12 0 the gatherer.

17 and 18 represent inlet and outlet ports in the heater 13 to aid combustion.

19 and 20 represent gas-burners having orifices 21, at Which the gas is ignited, and are hinged together by an'ordinary hinged coupling 22 similar to those used to connect the air-brake pipes between railway-cars, which coupler permits the burner to swing on. its axis in a similar manner to the two sections of the heater 13. A nipple 23 is secured to Specification of Letters Patent. Application filed- March 3, 1904. Serial No. 196.254.

Eatnted Feb. 20, 1906;

its free end, through which the gas-supply for the burners enters. Said hose is,so arranged and carried that its outlet into said burners follows the gatherers movements Without difficulty. 7 r 25 represents eyelets secured to the heater 13, and 26 represents hooks engaging the I If preferred, the heater can be raised by means independent of the'gather'er. Sue

means can be the ordinary rope and'pulley, I

counterbalanced and operated by hands or otherwise andsecured to the ends of books 26, so that the heater can travel in close proximity'to the gatherer, but still not be secured thereto.

The general operation is as follows: Assuming in Fig. I that the glass 1 contained in receptacle 2 is in a condition suitable fer drawing in cylindrical, flat, or other forms and that a cooling medium is circulating through the chamber 40f the cooler 3 and the heater 13 swung open on its hinges 14, the

operator then lowers the gatherer 7 by suita le means (not shown) secured in the eyelets 8 8 within the orifice formed by the annular cooler 3 until the rim of the gatherer 7 is immersed in the glass 1. After the glass adheres thereto the gatherer 7 is raised at the speed best suited'to cause the adhering glass to be raised therewith and of a uniform thickness. A gaseous fluid under pressure passes through and out of pipe 10 and iills the space within the draw, while the surplus passes out through port 11. Preferably the heater 13 is swung shut and looked around the shell of the gatherer before the projection 12 of the.

gaseous pressurjthrougii a port in the ,top

of the gatherer which tends to produce a cool current of gaseous vapor through the gatherer, chilling its walls and causing a criritractron thereof. This contraction of the gath-v erer frequently causes the adhering glass to crack and break off from the gatherer, thus destroying the draw. The importance, there- .fore, of mamtaimng or increasing the heat or the receptacle.

the gatherer, or at least the lower extremity thereof, and that portion of the glass pendent therefrom is evident. Hence I preferably attach a suitable device to the gath erer, prelerably as shown, to maintain or reinforce the heat, thus preventing an uneven contraction of the gatherer and. pendent glass at their junction, and thereby assuring a means for preventing the adhering glass from becoming dislodged during the time of drawing from As the gather-er 7 continues to rise the projection 12 thereon comes in contact with the under 'side of the flanges 16 of the heater 13 and carries the heater with it, thus renewing the initial heat of the lower extremity of the gatherer. It is understood that the heater 13 is heated sufficiently to suit the requirements. After the gatherer 7 and the pendent glass have been drawn upwardly to the predetermined height the endent glass is ready to be disconnected rom the glass contained in the receptacle.

For the purpose of illustration I have shown a hollow gatherer as drawing a cylinder of glass in connection with my invention; but a solid gatherer in any desired shape could be used for drawing flat or other shapes and my device could be attached thereto part being composed of pipes hinged together and a heat-retainer encircling said gatherer and made in pivoted sections.

2. In the manufacture of glass, a gatherer adapted to draw glass from a receptacle, a circular rib on the gatherer, a burner composed of pipes pivoted together, and a heatretaining device surrounding said burner and also composed ofpivoted sections, said rib,

located so as to pick up said burner and heatretaining device after the gatherer has ascended to bring the lower end of the gatherer within the Zone of heat.

Signed at Pittsburg, Pennsylvania, this 1stday of March, 1904.

p GEORGE HARVEY. Witnesses 2 J. HIHARRISON, EDWARD A. LAWRENCE.

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