US1904057A - Flash lamp - Google Patents

Flash lamp Download PDF

Info

Publication number
US1904057A
US1904057A US610266A US61026632A US1904057A US 1904057 A US1904057 A US 1904057A US 610266 A US610266 A US 610266A US 61026632 A US61026632 A US 61026632A US 1904057 A US1904057 A US 1904057A
Authority
US
United States
Prior art keywords
bulb
flash lamp
oxygen
ignition
metal
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 - Lifetime
Application number
US610266A
Inventor
Kobayashi Keishiro
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of US1904057A publication Critical patent/US1904057A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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

Definitions

  • My invention relates to flash lamps and more particularly to flash lamps used for photographic purposes. Still more particuularly my invention relates to ignition means therefor.
  • Flash lamps are already known in which metically sealed and containing a flashing medium and an ignition means located in said bulb comprising an inflammable substance and a heat conductor in contact therewith extending through said bulb and having a portion thereof extending beyond said an oxidizable metal in the form of a ribbon b lb or foil is placed in a transparent bulb filled with oxygen or an oxygen gas mixture.
  • the ignition of the combustible in the known lamps is accomplished by electrically heating up a filament carrying a fulminating substance thereon. This method of ignition requires of course the use of a source of electricity, such as house current or a separate battery.
  • One of the objects of my invention is the provision of means for igniting the combustible which will be simple and will eliminate auxiliary apparatus.
  • the single re of the drawing is a view in elevation, with a part of the glass bulb broken away so as to expose its contents.
  • my invention comprises a glass bulb 10 and a loose filling of a combustible material 11 therein consisting preferably of a thin foil or ribbon of metal such as aluminum or magnesium.
  • the bulb 10 contains a filling of a gas that supports combustion, preferably oxygen or a gas that generates oxygen.
  • a wire 12 of metal having a high heat conductivity such as copper is sealed in one end of the bulb 10 and projects into said bulb and terminates on the outside of the bulb preferably in the form of a spiral. The inward projecting end of the 2.
  • a flash lamp comprising a bulb hermetically sealed and containing a metal foil and an ignition means located in said bulb comprising an inflammable substance and a heat conductor in contact therewith extending through said bulb and having a portion thereof extending beyond said bulb.
  • wire 12 carries a highly inflammable sub-

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Resistance Heating (AREA)

Description

April 18, KQBAYASH| FLASH LAMP Filed May 9, 1932.
.ZZVI ENT UR KEJSHJR U K UEAYASHZ Patented Apr. 18, 1933 UNITED STATES PATENT OFFICE ZEISHIBO KOIBAYASHI, OF TOKYO, JAPAN, ASSIGNOR '10 GENERALELECMIG COMPANY,
' A CORPORATION OF NEW YORK LAMP Application filed Kay 9, 1932, Serial l lo. 810,286, and in Japan lay 28, 1931.
My invention relates to flash lamps and more particularly to flash lamps used for photographic purposes. Still more particuularly my invention relates to ignition means therefor.
Flash lamps are already known in which metically sealed and containing a flashing medium and an ignition means located in said bulb comprising an inflammable substance and a heat conductor in contact therewith extending through said bulb and having a portion thereof extending beyond said an oxidizable metal in the form of a ribbon b lb or foil is placed in a transparent bulb filled with oxygen or an oxygen gas mixture. The ignition of the combustible in the known lamps is accomplished by electrically heating up a filament carrying a fulminating substance thereon. This method of ignition requires of course the use of a source of electricity, such as house current or a separate battery. One of the objects of my invention is the provision of means for igniting the combustible which will be simple and will eliminate auxiliary apparatus.
Other features andadvantages of .my invention will appear from the following description of species thereof.
The single re of the drawing is a view in elevation, with a part of the glass bulb broken away so as to expose its contents.
Referring to the drawing, my invention comprises a glass bulb 10 and a loose filling of a combustible material 11 therein consisting preferably of a thin foil or ribbon of metal such as aluminum or magnesium. The bulb 10 contains a filling of a gas that supports combustion, preferably oxygen or a gas that generates oxygen. A wire 12 of metal having a high heat conductivity such as copper is sealed in one end of the bulb 10 and projects into said bulb and terminates on the outside of the bulb preferably in the form of a spiral. The inward projecting end of the 2. A flash lamp comprising a bulb hermetically sealed and containing a metal foil and an ignition means located in said bulb comprising an inflammable substance and a heat conductor in contact therewith extending through said bulb and having a portion thereof extending beyond said bulb.
In witness whereof, I have hereunto set my hand.
KEISHIRO KOBAYASHI.
wire 12 carries a highly inflammable sub-
US610266A 1931-05-26 1932-05-09 Flash lamp Expired - Lifetime US1904057A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1904057X 1931-05-26

Publications (1)

Publication Number Publication Date
US1904057A true US1904057A (en) 1933-04-18

Family

ID=16257592

Family Applications (1)

Application Number Title Priority Date Filing Date
US610266A Expired - Lifetime US1904057A (en) 1931-05-26 1932-05-09 Flash lamp

Country Status (1)

Country Link
US (1) US1904057A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4174944A (en) * 1978-01-30 1979-11-20 Gte Sylvania Incorporated Single lead electrically-activated flashlamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4174944A (en) * 1978-01-30 1979-11-20 Gte Sylvania Incorporated Single lead electrically-activated flashlamp

Similar Documents

Publication Publication Date Title
US1930315A (en) Flash lamp
US1904057A (en) Flash lamp
US2361495A (en) Flash lamp
US2333725A (en) Photoflash casing
US2370475A (en) Method and apparatus for testing sealed envelopes
US2438993A (en) Flashlight lamp
US2868003A (en) Photoflash lamp
US2020736A (en) Gaseous electric discharge device
GB370338A (en) Improvements in luminous electric discharge tubes
US2264043A (en) Electric photoflash lamp
US2740281A (en) Flash lamp
US2729960A (en) Flash lamp
US1986474A (en) Device for operating photoflash lamps
US2497910A (en) Flash lamp
GB1222626A (en) Flash lamps
US2316344A (en) Flash lamp
US2211884A (en) Incandescent lamp
US1623761A (en) Electric lamp
US1944854A (en) Flash light lamp
USRE18678E (en) Slash lamp
US1600843A (en) Tungsten arc lamp
GB405605A (en) Improvements in luminous electric discharge tubes
GB324578A (en) Improvements in flash lights such as those used for photographic purposes
US3672814A (en) Photoflash lamp with yttrium combustion filling
GB272653A (en) Improvements in or relating to incandescent electric lamp holders