GB839160A - Improvements in or relating to electric lamps - Google Patents

Improvements in or relating to electric lamps

Info

Publication number
GB839160A
GB839160A GB15831/58A GB1583158A GB839160A GB 839160 A GB839160 A GB 839160A GB 15831/58 A GB15831/58 A GB 15831/58A GB 1583158 A GB1583158 A GB 1583158A GB 839160 A GB839160 A GB 839160A
Authority
GB
United Kingdom
Prior art keywords
magnesium oxide
wires
lead
silicone resin
bridge
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
Application number
GB15831/58A
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.)
Auralight AB
Original Assignee
Lumalampan AB
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 Lumalampan AB filed Critical Lumalampan AB
Publication of GB839160A publication Critical patent/GB839160A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/62—One or more circuit elements structurally associated with the lamp
    • H01K1/70—One or more circuit elements structurally associated with the lamp with built-in short-circuiting device, e.g. for serially connected lamps

Landscapes

  • Resistance Heating (AREA)
  • Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)

Abstract

839,160. Electric incandescent lamps. LUMALAMPAN A.B. May 16,. 1958 [May 18, 1957], No. 15831/58. Drawings to Specification. Class 39(2) An electric lamp is provided with a current bridge between the lead-in wires to provide an alternative path for the current in the event of a break in the filament, the bridge comprising a paste of copper powder and magnesium oxide in a binder of silicone resin in proportions such that the material is insulating at the normal operating voltage but becomes conductive at a substantially higher voltage. The amount of magnesium oxide may be within the range 18-24% by weight of the copper oxide and is preferably of a smaller grain size. The material is applied by grinding together the copper powder and magnesium oxide and adding the silicone resin to form a viscous paste which is applied to the space between the lead-in wires, which may advantageously be about 2 mm. apart.
GB15831/58A 1957-05-18 1958-05-16 Improvements in or relating to electric lamps Expired GB839160A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE839160X 1957-05-18

Publications (1)

Publication Number Publication Date
GB839160A true GB839160A (en) 1960-06-29

Family

ID=20354165

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15831/58A Expired GB839160A (en) 1957-05-18 1958-05-16 Improvements in or relating to electric lamps

Country Status (1)

Country Link
GB (1) GB839160A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3620373A1 (en) * 1986-06-18 1987-12-23 Philips Patentverwaltung ELECTRIC BULB FOR SERIES CIRCUIT AND METHOD FOR THEIR PRODUCTION
DE4334510A1 (en) * 1993-10-09 1994-02-24 Gluehlampenwerk Oberweisbach G Electrical glow lamp - comprising current bridge having active electrical region and passive mechanical region

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3620373A1 (en) * 1986-06-18 1987-12-23 Philips Patentverwaltung ELECTRIC BULB FOR SERIES CIRCUIT AND METHOD FOR THEIR PRODUCTION
EP0251372A2 (en) * 1986-06-18 1988-01-07 Philips Patentverwaltung GmbH Electric incandescent lamp for series connection
US4808885A (en) * 1986-06-18 1989-02-28 U.S. Philips Corporation Electric incandescent lamp for series arrangement having an electrically conductive vitreous body connecting oxide coated current-supply conductors
EP0251372A3 (en) * 1986-06-18 1989-11-23 Philips Patentverwaltung Gmbh Electric incandescent lamp for series connection
DE4334510A1 (en) * 1993-10-09 1994-02-24 Gluehlampenwerk Oberweisbach G Electrical glow lamp - comprising current bridge having active electrical region and passive mechanical region

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