GB1425798A - Flash-bulb - Google Patents

Flash-bulb

Info

Publication number
GB1425798A
GB1425798A GB1843174A GB1843174A GB1425798A GB 1425798 A GB1425798 A GB 1425798A GB 1843174 A GB1843174 A GB 1843174A GB 1843174 A GB1843174 A GB 1843174A GB 1425798 A GB1425798 A GB 1425798A
Authority
GB
United Kingdom
Prior art keywords
conductors
sleeve
flash
conductor
lead
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
GB1843174A
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 Electronics UK Ltd
Original Assignee
Philips Electronic and Associated 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 Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1425798A publication Critical patent/GB1425798A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B15/00—Special procedures for taking photographs; Apparatus therefor
    • G03B15/02—Illuminating scene
    • G03B15/03—Combinations of cameras with lighting apparatus; Flash units
    • G03B15/04—Combinations of cameras with non-electronic flash apparatus; Non-electronic flash units
    • G03B15/0452—Electrical ignition means connected to the shutter
    • G03B15/0457—Ignition mechanisms for sequential ignition of flash lamps
    • 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
    • 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
    • F21K5/023—Ignition devices in photo flash bulbs

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)

Abstract

1425798 Flash-bulbs PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 26 April 1974 [1 May 1973] 18431/74 Heading G2L A flash-bulb comprises at least two lead in conductors 21, 22 at least one of which is connected to an ignition mechanism such as a filament 24, the conductors being surrounded over at least a part of their length by an electrically conductive metal sleeve 27 which is electrically insulated from at least one of the conductors and which melts when the lamp is fired to form a fused electrical connection between the conductors. The ignition filament may be connected between the conductor 22 and a third lead in conductor 23 disposed outside the sleeve 27 and surrounded by a glass or enamel insulator 28, or in a modification Fig. 1, (not shown) may be connected between the two conductors which pass through the sleeve. The sleeve may be made of copper or nickel.
GB1843174A 1973-05-01 1974-04-26 Flash-bulb Expired GB1425798A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7306018A NL7306018A (en) 1973-05-01 1973-05-01

Publications (1)

Publication Number Publication Date
GB1425798A true GB1425798A (en) 1976-02-18

Family

ID=19818761

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1843174A Expired GB1425798A (en) 1973-05-01 1974-04-26 Flash-bulb

Country Status (8)

Country Link
JP (1) JPS5032937A (en)
BE (1) BE814428A (en)
CA (1) CA1011128A (en)
DE (1) DE2418837A1 (en)
FR (1) FR2228193B1 (en)
GB (1) GB1425798A (en)
IT (1) IT1010137B (en)
NL (1) NL7306018A (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1259714A (en) * 1968-12-10 1972-01-12 Tokyo Shibaura Electric Co A flash lamp

Also Published As

Publication number Publication date
NL7306018A (en) 1974-11-05
FR2228193A1 (en) 1974-11-29
BE814428A (en) 1974-10-30
DE2418837A1 (en) 1974-11-21
FR2228193B1 (en) 1979-02-16
JPS5032937A (en) 1975-03-29
CA1011128A (en) 1977-05-31
IT1010137B (en) 1977-01-10

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee