GB357252A - Improvements in electric lamps - Google Patents
Improvements in electric lampsInfo
- Publication number
- GB357252A GB357252A GB18993/30A GB1899330A GB357252A GB 357252 A GB357252 A GB 357252A GB 18993/30 A GB18993/30 A GB 18993/30A GB 1899330 A GB1899330 A GB 1899330A GB 357252 A GB357252 A GB 357252A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filament
- wire
- tube
- leading
- electrodes
- 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
- H01J61/96—Lamps with light-emitting discharge path and separately-heated incandescent body within a common envelope, e.g. for simulating daylight
Abstract
357,252. Electric incandescent lamps. LEDERER, A., Hermesville, Vienna. June 21, 1930, No. 18993. Convention date, June 25, 1929. [Class 39 (ii).] An electric lamp comprises a glass envelope with a filling of a rare gas at a pressure of 0À5- 50À0 mm. of mercury, at least one filament adapted to be heated electrically to incandescence, and at least one electrode which emits electrons when heated to a temperature lower than that of the filament, the nature and mutual distance of the electrodes, and the gaseous conditions being such that, illumination is provided simultaneously by the incandescent filament and luminous discharge from the electrode. In one form adapted for direct current working, the incandescent filament b, Fig. 1, provided with a leading-in wire a, is connected to a supporting-wire c which is connected to the other leading-in wire d, and a small tube e of nickel or the like provided with a thermionically active layer surrounds the lower end of the filament, the tube being electrically connected to the leading-in wire a. Passage of current produces a luminous discharge between the electrodes e, c. Alternatively the tube e may be omitted, and a part of the filament, preferably the part adjacent to the leading-in wire, coated with materials such as alkaline-earth oxides for the production of the luminous discharge, this portion of the wire being formed of a larger cross section to avoid over-heating. In a modification for alternating current work, two incandescent filaments f, g, Fig. 2, are carried by leading-in wires h, i and a common support k, the lower ends of the filaments being surrounded by, and connected to, short tubes l, m coated with a thermionically active layer. Preferably the electrodes l, m are provided with projecting portions of wire or strip metal which extend towards one another and protect the electrodes by taking up the electron current. Discharge within a glass tube may be effected by arranging a filament in each of two bulbs connected by a transverse tube, or a filament extending the whole length of a tube may have its ends offset at right-angles and surrounded by oxide-coated metal tubes.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT132552T | 1929-06-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB357252A true GB357252A (en) | 1931-09-21 |
Family
ID=3637458
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB18993/30A Expired GB357252A (en) | 1929-06-25 | 1930-06-21 | Improvements in electric lamps |
Country Status (5)
Country | Link |
---|---|
US (1) | US2304768A (en) |
AT (1) | AT132552B (en) |
DE (1) | DE612050C (en) |
FR (1) | FR697876A (en) |
GB (1) | GB357252A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2444427A (en) * | 1943-03-26 | 1948-07-06 | Standard Telephones Cables Ltd | Gas filled tube |
US2438181A (en) * | 1943-05-27 | 1948-03-23 | Westinghouse Electric Corp | Fluorescent and/or cathode glow lamp and method |
US2930934A (en) * | 1958-02-12 | 1960-03-29 | Westinghouse Electric Corp | Discharge lamp |
DE1132657B (en) * | 1959-05-15 | 1962-07-05 | Patra Patent Treuhand | High-pressure discharge lamp with an ignition coil arranged in the discharge space parallel to the discharge |
-
1929
- 1929-06-25 AT AT132552D patent/AT132552B/en active
- 1929-10-30 DE DEL76579D patent/DE612050C/en not_active Expired
-
1930
- 1930-06-19 US US462167A patent/US2304768A/en not_active Expired - Lifetime
- 1930-06-21 GB GB18993/30A patent/GB357252A/en not_active Expired
- 1930-06-25 FR FR697876D patent/FR697876A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR697876A (en) | 1931-01-23 |
AT132552B (en) | 1933-03-25 |
US2304768A (en) | 1942-12-08 |
DE612050C (en) | 1935-04-12 |
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