GB720130A - Improvements in or relating to electric incandescent lamps - Google Patents

Improvements in or relating to electric incandescent lamps

Info

Publication number
GB720130A
GB720130A GB24827/52A GB2482752A GB720130A GB 720130 A GB720130 A GB 720130A GB 24827/52 A GB24827/52 A GB 24827/52A GB 2482752 A GB2482752 A GB 2482752A GB 720130 A GB720130 A GB 720130A
Authority
GB
United Kingdom
Prior art keywords
filaments
filament
lamp
electric incandescent
wire
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
GB24827/52A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries Ltd
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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB720130A publication Critical patent/GB720130A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01KELECTRIC INCANDESCENT LAMPS
    • H01K9/00Lamps having two or more incandescent bodies separately heated
    • H01K9/08Lamps having two or more incandescent bodies separately heated to provide selectively different light effects, e.g. for automobile headlamp

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

720,130. Electric incandescent lamps. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Oct. 3, 1952 [Oct. 6, 1951], No. 24827/52. Class 39 (2) In an electric incandescent lamp for use, for example, in a motor vehicle headlight, and comprising two coiled filaments, e.g. main and auxiliary filaments, 3, 7 arranged end to end along or parallel with the axis of the lamp and each with an end secured to a common terminal wire 6, the coils of the two filaments are wound in opposite directions so that the filament ends, 5 and 8 respectively, secured to the common terminal wire extend along a tangential plane common to the two filaments. In the example, the auxiliary filament 3 is associated with, and has one end connected to, a concave screen 2 supported solely by a leading-in wire 2a, and the main filament 7 has one end connected to a leading-in and supporting wire 9. As shown, the filaments are arranged coaxially with the lamp. Alternatively, the filament 7 may be coaxial with the lamp and the filament 3 displaced slightly from the axis in a direction away from the screen 2.
GB24827/52A 1951-10-06 1952-10-03 Improvements in or relating to electric incandescent lamps Expired GB720130A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP6288D DE887843C (en) 1951-10-06 1951-10-06 Electric light bulb with two filament wires, especially for car headlights

Publications (1)

Publication Number Publication Date
GB720130A true GB720130A (en) 1954-12-15

Family

ID=40622216

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24827/52A Expired GB720130A (en) 1951-10-06 1952-10-03 Improvements in or relating to electric incandescent lamps

Country Status (7)

Country Link
US (1) US2733377A (en)
BE (1) BE514629A (en)
CH (1) CH304864A (en)
DE (1) DE887843C (en)
FR (1) FR1073958A (en)
GB (1) GB720130A (en)
NL (2) NL89412C (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3156843A (en) * 1960-10-27 1964-11-10 Sylvania Electric Prod Incandescent lamp mount
US3548244A (en) * 1968-07-01 1970-12-15 British Lighting Ind Ltd Lamp having twin filaments and integral filament legs mounted in a bridge
DE10219729A1 (en) * 2002-05-02 2003-11-13 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Light bulb for automotive headlights

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2084750A (en) * 1935-01-29 1937-06-22 Edison Inc Thomas A Gaseous discharge system
LU28218A1 (en) * 1946-11-27
NL72673C (en) * 1949-04-13

Also Published As

Publication number Publication date
NL89412C (en) 1958-06-16
BE514629A (en)
DE887843C (en) 1953-08-27
CH304864A (en) 1955-01-31
FR1073958A (en) 1954-09-30
NL172909B (en)
US2733377A (en) 1956-01-31

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