GB1398705A - Circuit arrangements for incandescent lamp persormance - Google Patents

Circuit arrangements for incandescent lamp persormance

Info

Publication number
GB1398705A
GB1398705A GB881374A GB881374A GB1398705A GB 1398705 A GB1398705 A GB 1398705A GB 881374 A GB881374 A GB 881374A GB 881374 A GB881374 A GB 881374A GB 1398705 A GB1398705 A GB 1398705A
Authority
GB
United Kingdom
Prior art keywords
resistor
filament
lamp
weight
envelope
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
GB881374A
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.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of GB1398705A publication Critical patent/GB1398705A/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

Landscapes

  • Resistance Heating (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

1398705 Electric incandescent lamps; thermistors WESTINGHOUSE ELECTRIC CORP 27 Feb 1974 [8 March 1973] 8813/74 Headings H1F and H1K [Also in Division H2] A ceramic resistor comprising one or more oxides of vanadium having the composite formula V 2 O x (3<x<5) and having a negative temperature coefficient of resistance is connected in series with the filament of an electric incandescent lamp to limit the current inrush when the lamp is switched on to full operating voltage. The resistor may be disposed inside the envelope or cap of the lamp or sealed through the envelope where it serves as a lead-in conductor: alternatively the resistor may be completely external to and mechanically independent of the lamp. The resistor has a value at room temperature of between 0À5 and 2 times the hot resistance of the filament, this value decreasing, as the resistor heats up to about 70‹ C., to approximately 1% of the hot resistance of the filament at the same time as the filament itself heats up to its working temperature, the heating time being in the range of 0À1 to 8 seconds. The total mass of the resistor may be in the range of 16 to 32 times the mass of the filament, and the resistor contains 70%-98% by weight of vanadium oxide crystals and 2%- 30% by weight of binder glasses, the glasses containing at least 10% by weight of V 2 O 5 .
GB881374A 1973-03-08 1974-02-27 Circuit arrangements for incandescent lamp persormance Expired GB1398705A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US33949173A 1973-03-08 1973-03-08

Publications (1)

Publication Number Publication Date
GB1398705A true GB1398705A (en) 1975-06-25

Family

ID=23329239

Family Applications (1)

Application Number Title Priority Date Filing Date
GB881374A Expired GB1398705A (en) 1973-03-08 1974-02-27 Circuit arrangements for incandescent lamp persormance

Country Status (7)

Country Link
JP (1) JPS49126187A (en)
BE (1) BE812024A (en)
DE (1) DE2410884A1 (en)
FR (1) FR2220876B1 (en)
GB (1) GB1398705A (en)
IT (1) IT1004363B (en)
NL (1) NL7403017A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2140615A (en) * 1983-03-22 1984-11-28 Standard Telephones Cables Ltd Thermistor composite

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4219334A1 (en) * 1991-06-15 1992-12-17 Schmidt Hartmut Dipl Phys Low loss semiconductor current-limiting circuit for electric lamps - used NTC thermistor in series with lamp filament mounted in base to compensate resistance and limit switch=on current
US5504394A (en) * 1993-03-08 1996-04-02 Beacon Light Products, Inc. Lamp bulb having integrated lighting function control circuitry and method of manufacture

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE515839A (en) *
GB1168107A (en) * 1966-09-14 1969-10-22 Hitachi Ltd A Method for Producing Temperature Sensitive Resistor Comprising Vanadium Oxide

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2140615A (en) * 1983-03-22 1984-11-28 Standard Telephones Cables Ltd Thermistor composite
US4702619A (en) * 1983-03-22 1987-10-27 Standard Telephones And Cables Public Limited Company Temperature sensors

Also Published As

Publication number Publication date
BE812024A (en) 1974-09-09
DE2410884A1 (en) 1974-09-12
JPS49126187A (en) 1974-12-03
FR2220876A1 (en) 1974-10-04
IT1004363B (en) 1976-07-10
FR2220876B1 (en) 1977-09-23
NL7403017A (en) 1974-09-10

Similar Documents

Publication Publication Date Title
GB1231140A (en)
GB1531277A (en) Composite thermistor component
EP0245734A3 (en) Electric lamp
GB950157A (en) Improvements in or relating to pulsing units
JPH0737706A (en) Semiconductor ceramic element
GB1398705A (en) Circuit arrangements for incandescent lamp persormance
US2110690A (en) Electric circuit interrupter
GB1089635A (en) Electric discharge lamp
GB1514121A (en) Discharge lamp
US3993603A (en) Composition for VO2 incandescent lamp current inrush limiters
GB1057524A (en) Discharge lamp
US2081801A (en) Incandescent electric lamp
JPS54155673A (en) High pressure sodium lamp
GB823631A (en) Current limiting device for safeguarding circuit elements from excessive starting currents
US2668930A (en) Protective system
GB1075443A (en) Improvements in and relating to the operation of electric discharge lamps
USRE27953E (en) High pressure vapor discharge lamp with cesium iodide
JPS563967A (en) Starter-built in type metal vapor discharge lamp
GB1095055A (en) Improvements in or relating to high pressure metal vapour electric discharge lamps
GB749216A (en) Improvements in and relating to circuit arrangements for electric discharge tubes
JPS56167256A (en) Metal vapor discharge lamp
GB1537545A (en) Incandescent lamps
GB1498095A (en) Lamp with an integrated flasher device
GB839160A (en) Improvements in or relating to electric lamps
GB1266706A (en)

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee