US1512511A - Producing vessels of quartz or similar material difficult to fuse and impermeable for gases - Google Patents

Producing vessels of quartz or similar material difficult to fuse and impermeable for gases Download PDF

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Publication number
US1512511A
US1512511A US572040A US57204022A US1512511A US 1512511 A US1512511 A US 1512511A US 572040 A US572040 A US 572040A US 57204022 A US57204022 A US 57204022A US 1512511 A US1512511 A US 1512511A
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United States
Prior art keywords
quartz
gases
impermeable
fuse
similar material
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Expired - Lifetime
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US572040A
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Hirschberg Zacharias Von
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/02—Re-forming glass sheets
    • C03B23/023—Re-forming glass sheets by bending
    • C03B23/025—Re-forming glass sheets by bending by gravity
    • C03B23/0258—Gravity bending involving applying local or additional heating, cooling or insulating means
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/0066—Re-forming shaped glass by bending
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/04—Re-forming tubes or rods
    • C03B23/049—Re-forming tubes or rods by pressing
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B33/00—Severing cooled glass
    • C03B33/06—Cutting or splitting glass tubes, rods, or hollow products

Definitions

  • isolated hollow objects are rendered impermeable for gases by glazing their surfaces under the influence of a strong source of heat, as for instance by an oxyhydrogen gas-burner.
  • this process has the special disadvantage, that the separated hollow articles do not possess a uniform thickness of the walls. They are thinner in their lower parts, than at the margin; therefore they must be first ground off so that the wall becomes quite uniform throughout.
  • the object of the present invention is a method by which all these drawbacks are dispensed with.
  • the single hollow articles of quartz are not first shaped and afterwards rendered impermeable for gases by enamelling, but are simultaneously shaped and enamelled, without producing loss by breaking; a further grinding is unnecessary.
  • a hollow cylindrical melt is produced in the well known manner in the electric-resistance furnace and then a tube is formed by drawing it in the usual manner.
  • tubes of a distinct diameter according to the stress and pressure are produced having a corresponding length and uniform thickness of wall.
  • such tube is there afterdivided in its longitudinal direction into two equal halves; finally each half plece is transversely cut into a great number of fiat pieces or plates (which are more or less arch-shaped).
  • the plates thus produced show the same uniform thickness of wall, as the tube, from which they are derived.
  • the hollow body is immediately brought into the final shape for instance into crucibles, dishes and the like by the former known process by blowing and thereafter finished by enamelling
  • the hollow body is according to the present invention first formed into a fiat plate which for instance is slightly arched, having not yet the characteristics of the final article but showing merely a kind of universal frame, which is then subjected to the action of a strong source of heat, for instance an oXyhydrogen gas-burner, which exercises pressure on the final product and forces it on to the molds, thereby causing it to assume the shape of crucibles, dishes or the like and simultaneously glazing or enamelling the product.
  • the final product according to the known process is here replaced by a universally shaped preliminary article, receiving in the )BIlOd of glazing or enamelling the final s ape.
  • the arched plate produced by the division of a tube having the size of the final product is put upon the surface of a crucible or dish-shaped mould and then heated by a suitable strong source of heat for instance by an oxyhydrogen gas-burner or an electric arc.
  • a suitable strong source of heat for instance by an oxyhydrogen gas-burner or an electric arc.
  • the shallow-concavo-convex blank is softened point by point stepwise in such a manner that the surface is fritted, glazed and enamelled and thereby rendered impermeable for gases.
  • the plate accommodates itself to the surface of the mould. In this manner the plate is formed into the hollow final product, i, e., into a crucible, dish or the like, finally shaped and enamelled.
  • the costs of the meth- 0d are considerably diminished to nearly fifty per cent, because the breaking of the articles is avoided and the grinding rein dered unnecessary.
  • a process of producing hollow products impervious to gas and formed of a difiicultly fusible material which consists in producing a tube of the desired material, dividing said tube longitudinally, cutting the individual halves of the tube crosswise into ajplurality of plates curved in cross sections, placing said plates on the outer surface of a mold of the desired form, and subjecting the plates to the action of a strong source of heat and pressure, whereby the plate is caused to assume the form. of the mold and is simultaneously glazed.
  • a process of producing hollow products impervious to gas and made of quartz which consists in producing a hollow cylindrical body of quartz, cutting said body longitudinally thereof into two equal parts, cutting each of said parts into a plurality of plates carved in cross sections, placing said plates upon the outer surface of a mold having the form ot the article to be, produced, and subjecting said plates to the action o1 a strong source Oil heat and pressure thereby causing the plates to assume the form of the mold and siniultaneoiasly glazing the surface thereot.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Description

Patented Get. 21, 1924-.
UNITED-STATES A 1,512,511 PATENT OFFICE.
ZACI-IARIAS VON HIRSGHIBERG, OF BERLIN-PANKOW, G'rERIVIANY.v
PRODUCING VESSELS or QUARTZ on SIMILAR MATERIAL. DIFFICULT T0 rnsn Ann IMPERMEABLE non GASES.
N0 Drawing.
7 '0 all whom it may concern Be it known that I, ZACHARIAS VON Hinsorinnnc, citizen of Russia, residing at Berlin-Pankow, Germany, have invented new and useful Improvements in Producing Vessels of Quartz or Similar Material Difficult to Fuse and Impermeable for Gases.
It is very well known to produce a hollow cylindrical melt by fusing quartz and similar materials in an electric resistance furnace and to shape these melts after closing one end of the melt by drawing or blowing into dishes, crucibles and so on. For this purpose a mould is used, consisting of several hollow moulds, into which the melt cylinder is blown by means of compressed air. By this process a final product is obtained showing a continuous piece comprising as many hollow vessels as there are single moulds; though the articles produced are connected with each other, they are divided from each other by comparatively wide spaces. For the purpose of rendering the single articles impermeable for gases they must be mechanically disconnected and isolated. In such case the objects are easily broken by cutting or tearing off; likewise the material remaining in the interval between two following articles is lost. isolated hollow objects are rendered impermeable for gases by glazing their surfaces under the influence of a strong source of heat, as for instance by an oxyhydrogen gas-burner. Besides the above cited drawbacks this process has the special disadvantage, that the separated hollow articles do not possess a uniform thickness of the walls. They are thinner in their lower parts, than at the margin; therefore they must be first ground off so that the wall becomes quite uniform throughout.
The object of the present invention is a method by which all these drawbacks are dispensed with. The single hollow articles of quartz are not first shaped and afterwards rendered impermeable for gases by enamelling, but are simultaneously shaped and enamelled, without producing loss by breaking; a further grinding is unnecessary. I
For the purpose of embodying the new method a hollow cylindrical melt is produced in the well known manner in the electric-resistance furnace and then a tube is formed by drawing it in the usual manner.
Application filed June 30, 1922.
The
Serial No. 572,040.
By this drawing, tubes of a distinct diameter according to the stress and pressure are produced having a corresponding length and uniform thickness of wall. According to this invention such tube is there afterdivided in its longitudinal direction into two equal halves; finally each half plece is transversely cut into a great number of fiat pieces or plates (which are more or less arch-shaped).
The plates thus produced show the same uniform thickness of wall, as the tube, from which they are derived.
Whereas the hollow body is immediately brought into the final shape for instance into crucibles, dishes and the like by the former known process by blowing and thereafter finished by enamelling, the hollow body is according to the present invention first formed into a fiat plate which for instance is slightly arched, having not yet the characteristics of the final article but showing merely a kind of universal frame, which is then subjected to the action of a strong source of heat, for instance an oXyhydrogen gas-burner, which exercises pressure on the final product and forces it on to the molds, thereby causing it to assume the shape of crucibles, dishes or the like and simultaneously glazing or enamelling the product. The final product according to the known process is here replaced by a universally shaped preliminary article, receiving in the )BIlOd of glazing or enamelling the final s ape.
The arched plate, produced by the division of a tube having the size of the final product is put upon the surface of a crucible or dish-shaped mould and then heated by a suitable strong source of heat for instance by an oxyhydrogen gas-burner or an electric arc. By the combined action of the temperature and pressure of the burner the shallow-concavo-convex blank is softened point by point stepwise in such a manner that the surface is fritted, glazed and enamelled and thereby rendered impermeable for gases. At the same time the plate accommodates itself to the surface of the mould. In this manner the plate is formed into the hollow final product, i, e., into a crucible, dish or the like, finally shaped and enamelled. Besides the cited technical advantages the costs of the meth- 0d are considerably diminished to nearly fifty per cent, because the breaking of the articles is avoided and the grinding rein dered unnecessary.
Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is 2- 1. A process of producing hollow products impervious to gas and formed of a difiicultly fusible material, which consists in producing a tube of the desired material, dividing said tube longitudinally, cutting the individual halves of the tube crosswise into ajplurality of plates curved in cross sections, placing said plates on the outer surface of a mold of the desired form, and subjecting the plates to the action of a strong source of heat and pressure, whereby the plate is caused to assume the form. of the mold and is simultaneously glazed.
2. A process of producing hollow products impervious to gas and made of quartz, which consists in producing a hollow cylindrical body of quartz, cutting said body longitudinally thereof into two equal parts, cutting each of said parts into a plurality of plates carved in cross sections, placing said plates upon the outer surface of a mold having the form ot the article to be, produced, and subjecting said plates to the action o1 a strong source Oil heat and pressure thereby causing the plates to assume the form of the mold and siniultaneoiasly glazing the surface thereot.
In testimony whereof I have signed in name to this specification in the presence of two subscribing witnesses.
ZACHARIAS voN HI R SGHBERG.
lVitnesses E. HljLTZERMANN, LAURENCE A, Hansen.
US572040A 1922-06-30 1922-06-30 Producing vessels of quartz or similar material difficult to fuse and impermeable for gases Expired - Lifetime US1512511A (en)

Priority Applications (1)

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US572040A US1512511A (en) 1922-06-30 1922-06-30 Producing vessels of quartz or similar material difficult to fuse and impermeable for gases

Applications Claiming Priority (1)

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US572040A US1512511A (en) 1922-06-30 1922-06-30 Producing vessels of quartz or similar material difficult to fuse and impermeable for gases

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