US1875819A - Method of frosting the inner surface of alpha glass bulb - Google Patents

Method of frosting the inner surface of alpha glass bulb Download PDF

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Publication number
US1875819A
US1875819A US480278A US48027830A US1875819A US 1875819 A US1875819 A US 1875819A US 480278 A US480278 A US 480278A US 48027830 A US48027830 A US 48027830A US 1875819 A US1875819 A US 1875819A
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United States
Prior art keywords
liquid
bulb
frosting
glass bulb
powder
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Expired - Lifetime
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US480278A
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English (en)
Inventor
Naruse Tomisaburo
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Individual
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Individual
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Publication date
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Publication of US1875819A publication Critical patent/US1875819A/en
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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C15/00—Surface treatment of glass, not in the form of fibres or filaments, by etching

Definitions

  • This invention relates to a method offrosting a portion of the inner surface of a glass bulb of an electric lamp; consisting in first injecting in the bulb a special etching liquid through a narrow tube and thereupon extracting said liquid therefrom; said liquid containing a powder selected from a group consisting of powdered starch and cornflour, which acts to give cohesiveness to the liquid, to stir the liquid when it is injected in the bulb, whereby a sharp, clear, dividing line, between the frosted and transparent parts of the bulb and the smooth even surface of the frosted part are obtained.
  • the purpose of the invention is to obtain by the aid of a special etching, liquid and quickly the uniform edge or dividing line and the smooth even surface of the frosted part, whereby beautifullooking lamps can be made.
  • the liquid causes vortex motion while being pouredinto the bulb through a narrow tube and numerous wavelets are produced on the surface of the liquid, causing a zigzag edge of the frosted surface, or the liquid splashes and stains such part as is desired to be left transparent.
  • This invention aims. at securing perfect finish of the frosted part of an electric bulb, by removing such defects as are experienced when a corrosive liquid without a powder is used, namely:
  • this method employs an etching liquid containing some powder (e. g. starch, corn flour), which affects the etching action of the liquid very slightly and the specific gravit of which is somewhat greater than that 0 any other elements contained therein.
  • some powder e. g. starch, corn flour
  • the desired etching liquid can be ob tained first by mixing together the above mentioned elements and then by mixing into it American flour whose quantity is 20% of the mixture. It would be needless to say that the elements should vary according to the nature of the glass, and it has been found that 30 parts each of hydrogen fluoride and ammonium fluoride are eflective. And as to ,the relation between the specific gravity of the liquid and that of the powder it is enough if the powder be heavy enough to sink easily in the liquid.
  • Fig. 1 shows in elevation an apparatus for this method, partly in section.
  • Fig. 2 shows other example for this method.
  • corrosive liquid is injected and sucked out of the bulb (1) by one or two narrow tubes (2).
  • the liquid (5) is saved in the tank (3) and to inject the liquidin the bulb push the'piston (4) downwards as the arrow (at) shows, and to suck the liquid out of the bulb pull the piston (4i) upwards as the arrow ((1') shows.
  • the liquid (5) is saved in the tank (3) and when the tank is situated at the position that the liquid level is placed above the bulb (1) the cock (6) is opened, then the liquid in- 1' ected in the bulb, until the liquid level in the bulb reaches to the required height. After corrosion is finished, the tank is lowered until all the liquid in the bulb is sucked out.
  • a method of frosting a portion of the inner surface of a glass bulb of an electric lamp consisting in first injecting in the bulb liquid to alter the etching action in the a special etching liquid through a narrow tube and thereupon extracting said liquid therefrom; said liquid containing a powdered material selected from a group consisting of starch and cornfiour, which acts to give cohesiveness to the liquid,'whereby a sharp, clear, dividing line, between the frosted and transparent parts of the bulb is obtained said 'powdered material settling in the etching parts where the material has settled.
  • a method of'frosting a portion of the inner surface of a glass bulb of an electric lamp consisting in first injecting in the bulb a special etching liquid through a narrow tube and thereupon extracting said liquid therefrom; said liquid containing a powder selected from agroiip consisting of starch and cornflour, which acts to give cohesiveness answers

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Surface Treatment Of Glass (AREA)
US480278A 1929-09-20 1930-09-06 Method of frosting the inner surface of alpha glass bulb Expired - Lifetime US1875819A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP369887X 1929-09-20

Publications (1)

Publication Number Publication Date
US1875819A true US1875819A (en) 1932-09-06

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ID=12485114

Family Applications (1)

Application Number Title Priority Date Filing Date
US480278A Expired - Lifetime US1875819A (en) 1929-09-20 1930-09-06 Method of frosting the inner surface of alpha glass bulb

Country Status (5)

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US (1) US1875819A (pt)
DE (1) DE663883C (pt)
FR (1) FR702317A (pt)
GB (1) GB369887A (pt)
NL (1) NL54255C (pt)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE743907C (de) * 1937-01-09 1944-01-05 Oesterreichische Glasfabriken Verfahren zur Herstellung von das Licht diffus zerstreuenden Glasgegenstaenden, insbesondere Gluehlampenkolben, UEberfangglocken, Beleuchtungsglaesern u. dgl.
US2816399A (en) * 1953-06-09 1957-12-17 Soltysik Zeno Method of forming a well in light bulbs
US2955927A (en) * 1957-02-21 1960-10-11 Ogata Hisae Light-diffusing glass and process for making the same
US3043362A (en) * 1958-05-26 1962-07-10 Applic Et De Const Pour Materi Apparatus for machining a piece of work by means of an erosive fluid
US3058866A (en) * 1958-08-27 1962-10-16 Luma Lampan Aktiebolag Method of producing a light-diffusing layer on glass surfaces, especially on the inside of electric lamp envelopes
US3148088A (en) * 1961-08-25 1964-09-08 Hanson Van Winkle Munning Co Method for treating hollow articles having one closed end

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2954155A (en) * 1958-09-17 1960-09-27 Thompson Ramo Wooldridge Inc Compressor
DE1696481B1 (de) * 1962-02-06 1970-03-19 Conrad Lechmann Herstellung von reflexarmen Glasoberflaechen,insbesondere fuer Diapositivdeckglaeser

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE743907C (de) * 1937-01-09 1944-01-05 Oesterreichische Glasfabriken Verfahren zur Herstellung von das Licht diffus zerstreuenden Glasgegenstaenden, insbesondere Gluehlampenkolben, UEberfangglocken, Beleuchtungsglaesern u. dgl.
US2816399A (en) * 1953-06-09 1957-12-17 Soltysik Zeno Method of forming a well in light bulbs
US2955927A (en) * 1957-02-21 1960-10-11 Ogata Hisae Light-diffusing glass and process for making the same
US3043362A (en) * 1958-05-26 1962-07-10 Applic Et De Const Pour Materi Apparatus for machining a piece of work by means of an erosive fluid
US3058866A (en) * 1958-08-27 1962-10-16 Luma Lampan Aktiebolag Method of producing a light-diffusing layer on glass surfaces, especially on the inside of electric lamp envelopes
US3148088A (en) * 1961-08-25 1964-09-08 Hanson Van Winkle Munning Co Method for treating hollow articles having one closed end

Also Published As

Publication number Publication date
FR702317A (fr) 1931-04-04
DE663883C (de) 1938-08-16
NL54255C (pt)
GB369887A (en) 1932-03-31

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