US3415605A - Combustion flash bulbs - Google Patents

Combustion flash bulbs Download PDF

Info

Publication number
US3415605A
US3415605A US638631A US63863167A US3415605A US 3415605 A US3415605 A US 3415605A US 638631 A US638631 A US 638631A US 63863167 A US63863167 A US 63863167A US 3415605 A US3415605 A US 3415605A
Authority
US
United States
Prior art keywords
oxygen
gas
bulb
flash
flash bulbs
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
US638631A
Other languages
English (en)
Inventor
Tas Johannes Cornelis Van Der
Westerveld Willem
Kruimink Rudolf Maurits
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.)
US Philips Corp
North American Philips Co Inc
Original Assignee
US Philips Corp
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 US Philips Corp filed Critical US Philips Corp
Application granted granted Critical
Publication of US3415605A publication Critical patent/US3415605A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • Suitable fluorine compounds are: oxygen fluoride (OF and nitrogen fluorides (e.g. NF N F Oxygen fluoride has the disadvantage that it is toxic. Therefore, the large-scale use of said gas in flash bulbs seems hardly possible without taking special steps.
  • oxygen fluoride OF
  • nitrogen fluorides e.g. NF N F Oxygen fluoride has the disadvantage that it is toxic. Therefore, the large-scale use of said gas in flash bulbs seems hardly possible without taking special steps.
  • auxiliary gas having a braking effect on the combustion.
  • suitable auxiliary gases are volatile halogen-containing compounds of boron, carbon, silicon, titanium, germanium or .tin having a combustion heat smaller than 200 kcaL/mol. Under the conditions prevailing in the bulb, these compounds do not react with oxygen or with the solid substance.
  • the flash bulb according to the invention is characterized in that the bulb contains a mixture of oxygen and nitrogen fluoride.
  • Table I which relates to a flash bulb having a volume of approximately 1.2 crn. and which contains 22 mgs. of zirconium in the form of a metal wool
  • the relative pressures in a gas mixture of oxygen and N1 are stated in the first and second columns; the third column indicates the ratio between oxygen and NE, in the gas mixture, expressed in equivalent quantities.
  • the fourth and fifth columns indicate the light output in lumenseconds and in lumenseconds per mg. of zirconium, respectively.
  • the sixth column indicates the maximum time.
  • the stated values are invariably the average values of measurements on five flash bulbs.
  • the table also includes measurements relating to bulbs solely containing oxygen and NF respectively.
  • tween 21 solid substance in said bulb and a gas in said bulb
  • the improvement which comprises employing as said gas a mixture of oxygen and nitrogen fluoride, the ratio of oxygen and nitrogen fluoride, expressed in equivalent quantities being between 3:1 to 1:1 and wherein the total amount of oxygen and nitrogen fluoride is sulficient to convert all of said solid substance present in the bulb to the corresponding saturated oxide and fluoride.
  • a combustion flash bulb as claimed in claim 1 characterized in that the ratio between oxygen and nitrogen fluoride in the gas mixture, expressed in equivalent quantities, is approximately 1:1.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Discharge Lamp (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
US638631A 1966-05-17 1967-05-15 Combustion flash bulbs Expired - Lifetime US3415605A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6606713A NL6606713A (ref) 1966-05-17 1966-05-17

Publications (1)

Publication Number Publication Date
US3415605A true US3415605A (en) 1968-12-10

Family

ID=19796620

Family Applications (1)

Application Number Title Priority Date Filing Date
US638631A Expired - Lifetime US3415605A (en) 1966-05-17 1967-05-15 Combustion flash bulbs

Country Status (7)

Country Link
US (1) US3415605A (ref)
AT (1) AT273670B (ref)
BE (1) BE698543A (ref)
CH (1) CH459755A (ref)
GB (1) GB1114173A (ref)
NL (1) NL6606713A (ref)
SE (1) SE314896B (ref)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3765821A (en) * 1971-10-14 1973-10-16 Gte Laboratories Inc Flash lamp
US3807935A (en) * 1971-10-14 1974-04-30 Gte Laboratories Inc Flash lamp

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3765821A (en) * 1971-10-14 1973-10-16 Gte Laboratories Inc Flash lamp
US3807935A (en) * 1971-10-14 1974-04-30 Gte Laboratories Inc Flash lamp

Also Published As

Publication number Publication date
SE314896B (ref) 1969-09-15
DE1597715A1 (de) 1970-06-04
NL6606713A (ref) 1967-11-20
GB1114173A (en) 1968-05-15
AT273670B (de) 1969-08-25
BE698543A (ref) 1967-11-16
DE1597715B2 (de) 1975-09-25
CH459755A (de) 1968-07-15

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