GB434919A - Improved mercury vapour lamp, more particularly for projection purposes - Google Patents
Improved mercury vapour lamp, more particularly for projection purposesInfo
- Publication number
- GB434919A GB434919A GB2541/35A GB254135A GB434919A GB 434919 A GB434919 A GB 434919A GB 2541/35 A GB2541/35 A GB 2541/35A GB 254135 A GB254135 A GB 254135A GB 434919 A GB434919 A GB 434919A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lamp
- envelope
- electrodes
- mercury
- filling
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
- H01J61/822—High-pressure mercury lamps
Landscapes
- Discharge Lamps And Accessories Thereof (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
434,919. Mercury - vapour lamps. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, Emmasingel, Eindhoven, Holland. Jan. 25, 1935, No. 2541. Convention date, Feb. 5, 1934. Drawings to Specification. [Class 39 (i)] A lamp, more particularly for projection purposes, comprises one or more fixed incandescent electrodes and a filling of mercury vapour which is unsaturated during normal operation, the consumption of energy per cm. of the discharge path exceeding 100 watts. The load depends upon the softening temperature, and the dimensions of the bulb. The electrodes preferably are located vertically one above the other but a magnetic field may be used to suppress the curvature of a horizontal discharge path. The lamp may be provided with two oxide-coated helically-wound electrodes which may be heated directly or indirectly or by the discharge. Glass is applied to the leading-in wires and is fused to the envelope which may consist of quartz or the material known under the Registered Trade Mark "Supremax." The filling of a lamp of which the Specification gives dimensions of the envelope and distances between the electrodes &c., consists of argon at 5 mm. pressure and 1 gme. of mercury. To obtain a uniform thermal distribution over the envelope, the distance between the lower electrode and its seal is smaller than that between the upper electrode and its seal. The lamp may be housed within an envelope containing gas at a pressure greater than atmospheric.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE434919X | 1934-02-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB434919A true GB434919A (en) | 1935-09-11 |
Family
ID=6506703
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2541/35A Expired GB434919A (en) | 1934-02-05 | 1935-01-25 | Improved mercury vapour lamp, more particularly for projection purposes |
Country Status (3)
Country | Link |
---|---|
US (1) | US2116741A (en) |
FR (1) | FR784677A (en) |
GB (1) | GB434919A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL183069C (en) * | 1979-04-26 | 1988-07-01 | Mitsubishi Electric Corp | METAL VAPOR DISCHARGE LAMP. |
-
1935
- 1935-01-25 FR FR784677D patent/FR784677A/en not_active Expired
- 1935-01-25 GB GB2541/35A patent/GB434919A/en not_active Expired
- 1935-01-31 US US4371A patent/US2116741A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
US2116741A (en) | 1938-05-10 |
FR784677A (en) | 1935-07-22 |
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