GB403638A - Improvements in flashlight devices suitable for photographic and the like purposes - Google Patents

Improvements in flashlight devices suitable for photographic and the like purposes

Info

Publication number
GB403638A
GB403638A GB3470333A GB3470333A GB403638A GB 403638 A GB403638 A GB 403638A GB 3470333 A GB3470333 A GB 3470333A GB 3470333 A GB3470333 A GB 3470333A GB 403638 A GB403638 A GB 403638A
Authority
GB
United Kingdom
Prior art keywords
flashlight
photographic
purposes
devices suitable
lamp
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
GB3470333A
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
Priority to GB3470333A priority Critical patent/GB403638A/en
Publication of GB403638A publication Critical patent/GB403638A/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

403,638. Flashlight lamps. CROWLEY, J. F., Westminster House, Gt. George Street, London. March 19, 1932, No. 34703/33. Divided on 403,427. Drawings to Specification. [Class 75 (i).] A flashlight lamp comprising a rigid translucent bulb containing a change of powder, metal strip, gas, vapour, foil, or dust or a mixture thereof is prevented from exploding on ignition by the provision of pressurerelieving valves on the walls of the bulb or an extension thereof other than the filling stem. The lamp and igniting means described are the same as are described with reference to Fig. 1 of Specification 403,637. Specification 403,427 also is referred to.
GB3470333A 1933-03-19 1933-03-19 Improvements in flashlight devices suitable for photographic and the like purposes Expired GB403638A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3470333A GB403638A (en) 1933-03-19 1933-03-19 Improvements in flashlight devices suitable for photographic and the like purposes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3470333A GB403638A (en) 1933-03-19 1933-03-19 Improvements in flashlight devices suitable for photographic and the like purposes

Publications (1)

Publication Number Publication Date
GB403638A true GB403638A (en) 1933-12-19

Family

ID=10368904

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3470333A Expired GB403638A (en) 1933-03-19 1933-03-19 Improvements in flashlight devices suitable for photographic and the like purposes

Country Status (1)

Country Link
GB (1) GB403638A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2651189A (en) * 1951-06-27 1953-09-08 Westinghouse Electric Corp Photoflash lamp
US5871346A (en) * 1997-01-24 1999-02-16 Eastman Kodak Company Flashlamp array venting structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2651189A (en) * 1951-06-27 1953-09-08 Westinghouse Electric Corp Photoflash lamp
US5871346A (en) * 1997-01-24 1999-02-16 Eastman Kodak Company Flashlamp array venting structure

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