GB324578A - Improvements in flash lights such as those used for photographic purposes - Google Patents

Improvements in flash lights such as those used for photographic purposes

Info

Publication number
GB324578A
GB324578A GB9998/29A GB999829A GB324578A GB 324578 A GB324578 A GB 324578A GB 9998/29 A GB9998/29 A GB 9998/29A GB 999829 A GB999829 A GB 999829A GB 324578 A GB324578 A GB 324578A
Authority
GB
United Kingdom
Prior art keywords
foil
oxygen
bulb
millimetres
photographic purposes
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
GB9998/29A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB324578A publication Critical patent/GB324578A/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

Abstract

324,578. Ostermeier, J. Feb. 28, 1929, [Convention date]. Magnesium and l i k e lamps. - A flash lamp suitable for photographic purposes comprises a gastight transparent bulb 1 containing a quantity of thin foil of oxidizable material and oxygen and a gas mixture containing oxygen, or a gas capable of yielding oxygen. The bulb after evacuation is charged with oxygen &c. to a pressure of about 150 millimetres of mercury through a tube 3. The foil 8 is ignited by passing an electric current through a combustible wire 6 and so heating an inflammable pellet 7. The foil may be of metal, metallic alloy, rare earth or organic materials, aluminium, copper, iron, nickel, phosphor-bronze, cerium and zirconium being stated to be suitable. The thickness of the foil is preferably about 0.0005 millimetres. The bulb may be provided with an internal or external screen to absorb a given portion of the spectrum of the emitted light or be made of a material which has such an absorbent action.
GB9998/29A 1929-02-28 1929-03-28 Improvements in flash lights such as those used for photographic purposes Expired GB324578A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE324578X 1929-02-28

Publications (1)

Publication Number Publication Date
GB324578A true GB324578A (en) 1930-01-30

Family

ID=6180357

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9998/29A Expired GB324578A (en) 1929-02-28 1929-03-28 Improvements in flash lights such as those used for photographic purposes

Country Status (1)

Country Link
GB (1) GB324578A (en)

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