GB404222A - Improvements in electric incandescent lamps - Google Patents
Improvements in electric incandescent lampsInfo
- Publication number
- GB404222A GB404222A GB19650/33A GB1965033A GB404222A GB 404222 A GB404222 A GB 404222A GB 19650/33 A GB19650/33 A GB 19650/33A GB 1965033 A GB1965033 A GB 1965033A GB 404222 A GB404222 A GB 404222A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filament
- lamp
- screen
- electric
- incandescent
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K9/00—Lamps having two or more incandescent bodies separately heated
- H01K9/08—Lamps having two or more incandescent bodies separately heated to provide selectively different light effects, e.g. for automobile headlamp
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/16—Tuyéres
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/28—Envelopes; Vessels
- H01K1/32—Envelopes; Vessels provided with coatings on the walls; Vessels or coatings thereon characterised by the material thereof
- H01K1/325—Reflecting coating
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
404,222. Electric incandescent lamps with internal screens. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London.-(Assignees of Patent-Treuhand-Ges. f³r Elektrische Gl³hlampen ; 11, Ehrenbergstrasse, Berlin.) July 11, 1933, No. 19650. Convention date, July 28, 1932. [Class 39 (ii).] In an electric incandescent lamp for a motor car headlight, of the type having a screen under one filament so that when the lamp is mounted-within a reflector the light emi ted from it is confined to less than a hemisphere opaque means are provided for intercepting the direct rays from this filament which otherwise would pass upwardly and outwardly near the upper front edge of the reflector, but not intercepting the reflected rays therefrom passing downwardly near the lower front edge of the reflector. The opaque means may comprise part of the screen 10 mounted under the auxiliary filament 9, but preferably consists of an approximately crescent - shaped opaque coating 12 on the lamp bulb, with its straight base parallel to or coincident with the horizontal middle plane of the lamp, the area covered being sufficient to screen off the cone a of direct rays from the auxiliary filament 9 without materially affecting the beam from the main filament 8. To increase the " near " beam from the auxiliary filament the front wall of the screen 10 may be provided with a small aperture below the tongue 11 to enable a beam b of direct rays to be emitted. The upper half of the bulb may be provided with a transparent coloured, for example yellow, coating 14 which may be applied as described in Specification 246,985, [Class 39 (ii), Electric lamps, Incandescent], the base of the area coated preferably being above the middle plane of the lamp. Specification 210,105, [Class 39 (ii), Electric lamps, Incandescent], is also referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE743401X | 1932-07-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB404222A true GB404222A (en) | 1934-01-11 |
Family
ID=7750781
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB35606/32A Expired GB416561A (en) | 1932-07-28 | 1932-12-15 | Improvements in electric lamps with reflectors |
GB19650/33A Expired GB404222A (en) | 1932-07-28 | 1933-07-11 | Improvements in electric incandescent lamps |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB35606/32A Expired GB416561A (en) | 1932-07-28 | 1932-12-15 | Improvements in electric lamps with reflectors |
Country Status (3)
Country | Link |
---|---|
US (1) | US1947243A (en) |
FR (2) | FR743401A (en) |
GB (2) | GB416561A (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL89171C (en) * | 1954-07-24 | |||
US3025424A (en) * | 1958-06-16 | 1962-03-13 | Gen Electric | Electric lamp |
DE1149453B (en) * | 1960-10-13 | 1963-05-30 | Rolf Mickley | Two-filament incandescent lamp for dimmed high-beam and near-light in vehicle headlights |
NL284072A (en) * | 1961-10-09 | |||
US3697802A (en) * | 1970-10-12 | 1972-10-10 | Wagner Electric Corp | Two-terminal, two-color indicator lamp assembly |
US4644452A (en) * | 1985-10-25 | 1987-02-17 | Kasboske George C | Vehicle headlamp with fog penetrating capability |
GB2251122B (en) * | 1990-12-14 | 1994-09-14 | Piaa Corp | Vehicular lighting device |
-
1932
- 1932-09-28 FR FR743401D patent/FR743401A/fr not_active Expired
- 1932-12-15 FR FR747606D patent/FR747606A/en not_active Expired
- 1932-12-15 GB GB35606/32A patent/GB416561A/en not_active Expired
-
1933
- 1933-07-11 GB GB19650/33A patent/GB404222A/en not_active Expired
- 1933-07-11 US US679978A patent/US1947243A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US1947243A (en) | 1934-02-13 |
FR743401A (en) | 1933-03-30 |
GB416561A (en) | 1934-09-17 |
FR747606A (en) | 1933-06-19 |
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