GB607338A - Improvements in and relating to filters for flash lamps - Google Patents

Improvements in and relating to filters for flash lamps

Info

Publication number
GB607338A
GB607338A GB3020/46A GB302046A GB607338A GB 607338 A GB607338 A GB 607338A GB 3020/46 A GB3020/46 A GB 3020/46A GB 302046 A GB302046 A GB 302046A GB 607338 A GB607338 A GB 607338A
Authority
GB
United Kingdom
Prior art keywords
filters
relating
flash lamps
lamp
lamps
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
GB3020/46A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB607338A publication Critical patent/GB607338A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K5/00—Light sources using charges of combustible material, e.g. illuminating flash devices
    • F21K5/02—Light sources using charges of combustible material, e.g. illuminating flash devices ignited in a non-disrupting container, e.g. photo-flash bulb

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Optical Filters (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)

Abstract

607,338. Photographic flash-lamps. BRITISH THOMSON-HOUSTON CO., Ltd. Jan. 30, 1946, No. 3020. Convention date, Feb. 5, 1945. Drawings to Specification. [Class 9 (ii)] [Also in Group XX] The transparent envelope of a photoflash lamp is coated with an iron blue pigment and methyl violet dye preferably in the proportions by weight of 25 to 1, so that it acts as a colour filter for transforming the light of the lamp to daylight character.
GB3020/46A 1945-02-05 1946-01-30 Improvements in and relating to filters for flash lamps Expired GB607338A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US607338XA 1945-02-05 1945-02-05

Publications (1)

Publication Number Publication Date
GB607338A true GB607338A (en) 1948-08-30

Family

ID=22031414

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3020/46A Expired GB607338A (en) 1945-02-05 1946-01-30 Improvements in and relating to filters for flash lamps

Country Status (1)

Country Link
GB (1) GB607338A (en)

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