GB854790A - Photoflash lamp - Google Patents
Photoflash lampInfo
- Publication number
- GB854790A GB854790A GB22892/58A GB2289258A GB854790A GB 854790 A GB854790 A GB 854790A GB 22892/58 A GB22892/58 A GB 22892/58A GB 2289258 A GB2289258 A GB 2289258A GB 854790 A GB854790 A GB 854790A
- Authority
- GB
- United Kingdom
- Prior art keywords
- strip
- wires
- stem
- lead
- molybdenum
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Common Detailed Techniques For Electron Tubes Or Discharge Tubes (AREA)
Abstract
854,790. Photographic flash lamps. SYLVANIA ELECTRIC PRODUCTS Inc. July 16, 1958 [July 16, 1957], No. 22892/58. Class 9(2). A photo-flash lamp comprises a sealed envelope enclosing a stem 4 through which extend lead-in wires 6, 8, preferably of nickel, connected to the base 10 at points 12, 14 respectively. The inner ends of the leads 6, 8, which are connected by a filament 16, are coated with an ignition paste 18 usually containing an oxidizer and zirconium metal in a nitro-cellulose base. A frame supporting a strip 20 of magnesium comprises nickel wires 24, 26 joined together by molybdenum wires 28, 30, the wire 30 being passed through the strip 20 and wire 28 being attached to lead 6, while molybdenum wires 32 connect the sides of the strip to the frame. To prevent hot particles falling into the neck of the bulb, an asbestos disc 34 is placed on the stem 4. A molybdenum tab 36 is provided for lead 6 to retard heat conduction to stem 4. Preferably an ignition coating 38 comprising a mixture of zirconium powder and nitro-cellulose binder is applied to the lower end of the strip 20. The gas filling is oxygen with about 2% to 12% of nitrogen by volume. The framework supporting the magnesium strip may be cemented to the glass envelope instead of being attached to the bead 6.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US854790XA | 1957-07-16 | 1957-07-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB854790A true GB854790A (en) | 1960-11-23 |
Family
ID=22191876
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB22892/58A Expired GB854790A (en) | 1957-07-16 | 1958-07-16 | Photoflash lamp |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB854790A (en) |
-
1958
- 1958-07-16 GB GB22892/58A patent/GB854790A/en not_active Expired
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