US2210489A - Electrical device - Google Patents

Electrical device Download PDF

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Publication number
US2210489A
US2210489A US281290A US28129039A US2210489A US 2210489 A US2210489 A US 2210489A US 281290 A US281290 A US 281290A US 28129039 A US28129039 A US 28129039A US 2210489 A US2210489 A US 2210489A
Authority
US
United States
Prior art keywords
bulb
net
envelope
glass
electrical device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US281290A
Other languages
English (en)
Inventor
Hendricus J Lemmens
Josephus A M Smelt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of US2210489A publication Critical patent/US2210489A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/02—Vessels; Containers; Shields associated therewith; Vacuum locks
    • 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
    • C03C3/00—Glass compositions
    • C03C3/04—Glass compositions containing silica
    • C03C3/062—Glass compositions containing silica with less than 40% silica by weight
    • C03C3/07—Glass compositions containing silica with less than 40% silica by weight containing lead
    • C03C3/072—Glass compositions containing silica with less than 40% silica by weight containing lead containing boron

Definitions

  • One object of our invention is to provide a.
  • a feature of our invention is the provision of a protective net which is fastened, by means of a thin layer of a transparent glass-like material having a melting point below the softening point of the bulb glass, to the outer surface of the bulb in such a way that it constitutes one unit with the bulb.
  • This construction affords the possibility of utilizing a net having openings considerably larger than in the case where the net is placed loosely around the bulb. As a result of this measure, the light loss of the lamp according to the invention is limited to a minimum.
  • Fig. l is an elevation of an electric incandescent lamp provided with a'protective net comprising our invention
  • Fig. 2 is a longitudinal sectional view, on an enlarged scale, of a portion of the bulb wall of the lamp shown in Fig. 1.
  • the lamp there shown is of the high operating pressure type
  • the lamp comprises a bulb I containing a gas filling consisting of krypton with a small addition of nitrogen.
  • the volume of the bulb of the lamp illustrated in the drawing is approximately 2 cm.
  • the bulb l is made of hard glass with a softening point of approximately 600 to 800 C.
  • a filament 4 is mounted within the bulb l by means of a pair of current supply wires 2 and 3 which extend through the wall of the bulb at one end thereof.
  • the wall 6 of the bulb i is surrounded by a metallic protective net I preferably in the form of a wire helix or spiral.
  • the said net constitutes one unit with the bulb I and is fastened thereto by means of a thin layer 8 of a transparent, glasslike material with a melting point of approximately 500 C.
  • the turns 1 of the wire net are securely fastened to the wall 6 of the bulb by means of the glasslike transparent material 8 which is sealed to the bulb wall 6 and which encases the wire turns 1.
  • the openings in the network are large, thus presenting very little obstruction tothe free transmission of the light rays generated by the filament 4' within the bulb and thus causing relatively little light loss.
  • the network is capable of holding the fragments of the bulb together if the lamp shouldexplode, since the glass of the bulb is uniformly stuck to the net I.
  • the bulb I can be provided with the protective net 1 according to the invention by first immersing the bulb, with the net in place thereon, in a bath consisting of a liquid in which there is suspended, the finely ground, transparent glass-like material 8 with a melting point below that of the bulb material. The bulb and its surrounding net are then allowed to dry, after which the unit is heated to a temperature between the melting point of the finely ground, glass-like material 8 and the softening point of the bulb material. The glass-like fastening material 8 is then allowed to cool.
  • the glassy material 8 may have the following composition:
  • An electrical device comprising a sealed vitreous envelope containing a light source, said envelope being provided with a metallic protective net secured to the outer surface of said en- 5 velope by a thin layer of a transparent glass-like material having a melting point below the softening point of said envelope, said material being fused to the said envelope.
  • An electrical device comprising a sealed 10 vitreous envelope containing a light source, a
  • said wire net having relatively large openings and being secured to the outer surface of said envelope by a layer of a transparent glass-like ma- 15 terial on the wires of said net, said material having a melting point below the softening point of said envelope and being fused to the said envelope.

Landscapes

  • 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)
  • Resistance Heating (AREA)
US281290A 1938-06-27 1939-06-26 Electrical device Expired - Lifetime US2210489A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE520624X 1938-06-27

Publications (1)

Publication Number Publication Date
US2210489A true US2210489A (en) 1940-08-06

Family

ID=6551121

Family Applications (1)

Application Number Title Priority Date Filing Date
US281290A Expired - Lifetime US2210489A (en) 1938-06-27 1939-06-26 Electrical device

Country Status (5)

Country Link
US (1) US2210489A (enrdf_load_stackoverflow)
BE (1) BE435108A (enrdf_load_stackoverflow)
FR (1) FR856896A (enrdf_load_stackoverflow)
GB (1) GB520624A (enrdf_load_stackoverflow)
NL (1) NL53900C (enrdf_load_stackoverflow)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508354A (en) * 1944-10-21 1950-05-23 Bendix Aviat Corp Spark plug or the like
US2567415A (en) * 1948-09-30 1951-09-11 Bell Telephone Labor Inc Grid assembly and method of fabrication
US2615816A (en) * 1948-05-05 1952-10-28 Gen Electric Glass solder
US2617220A (en) * 1948-09-21 1952-11-11 Marine Aircraft Corp Paneled display for airplane wing surfaces
US2643020A (en) * 1946-03-04 1953-06-23 Corning Glass Works Soft glass and composite article
US2770923A (en) * 1951-09-04 1956-11-20 Corning Glass Works Internal glass-to-metal seal
US3297188A (en) * 1964-05-14 1967-01-10 William R Aiken Envelope for cathode ray tubes
US3414863A (en) * 1956-05-28 1968-12-03 Jerome H. Lemelson Electrically conducting panel
US3507646A (en) * 1965-12-27 1970-04-21 Xerox Corp Electrophotographic process using a single phase photoconductive glass imaging layer
US3519161A (en) * 1968-08-14 1970-07-07 Owens Illinois Inc Implosion-resistant cathode-ray tube and method of making
US3923530A (en) * 1973-06-27 1975-12-02 Ibm Dielectric glass composition
US4018613A (en) * 1976-02-06 1977-04-19 Corning Glass Works Diode encapsulation glass
EP0022195A3 (en) * 1979-06-28 1981-12-09 International Business Machines Corporation Glass composition for embedding several glass nozzles in a multiple-nozzle ink jet printer
US6652127B2 (en) 2002-02-19 2003-11-25 Michael A. Tarabula Light unit shield device

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8604117D0 (en) * 1986-02-19 1986-03-26 Mclauchlan R A Light tube protector

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2508354A (en) * 1944-10-21 1950-05-23 Bendix Aviat Corp Spark plug or the like
US2643020A (en) * 1946-03-04 1953-06-23 Corning Glass Works Soft glass and composite article
US2615816A (en) * 1948-05-05 1952-10-28 Gen Electric Glass solder
US2617220A (en) * 1948-09-21 1952-11-11 Marine Aircraft Corp Paneled display for airplane wing surfaces
US2567415A (en) * 1948-09-30 1951-09-11 Bell Telephone Labor Inc Grid assembly and method of fabrication
US2770923A (en) * 1951-09-04 1956-11-20 Corning Glass Works Internal glass-to-metal seal
US3414863A (en) * 1956-05-28 1968-12-03 Jerome H. Lemelson Electrically conducting panel
US3297188A (en) * 1964-05-14 1967-01-10 William R Aiken Envelope for cathode ray tubes
US3507646A (en) * 1965-12-27 1970-04-21 Xerox Corp Electrophotographic process using a single phase photoconductive glass imaging layer
US3519161A (en) * 1968-08-14 1970-07-07 Owens Illinois Inc Implosion-resistant cathode-ray tube and method of making
US3923530A (en) * 1973-06-27 1975-12-02 Ibm Dielectric glass composition
US4018613A (en) * 1976-02-06 1977-04-19 Corning Glass Works Diode encapsulation glass
EP0022195A3 (en) * 1979-06-28 1981-12-09 International Business Machines Corporation Glass composition for embedding several glass nozzles in a multiple-nozzle ink jet printer
US6652127B2 (en) 2002-02-19 2003-11-25 Michael A. Tarabula Light unit shield device

Also Published As

Publication number Publication date
NL53900C (enrdf_load_stackoverflow)
GB520624A (en) 1940-04-29
BE435108A (enrdf_load_stackoverflow)
FR856896A (fr) 1940-08-13

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