GB398693A - Improvements in electric incandescent lamps - Google Patents
Improvements in electric incandescent lampsInfo
- Publication number
- GB398693A GB398693A GB35980/32A GB3598032A GB398693A GB 398693 A GB398693 A GB 398693A GB 35980/32 A GB35980/32 A GB 35980/32A GB 3598032 A GB3598032 A GB 3598032A GB 398693 A GB398693 A GB 398693A
- Authority
- GB
- United Kingdom
- Prior art keywords
- filament
- cap
- contact
- class
- electric
- 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
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/62—One or more circuit elements structurally associated with the lamp
- H01K1/64—One or more circuit elements structurally associated with the lamp with built-in switch
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
- Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
Abstract
398,693. Multiple-filament electric lamps. GENERAL ELECTRIC CO., Ltd., Magnet House, Kingsway, London.-(Assignees of Patent-Treuhand-Ges. ; 11, Ehrenbergstrasse, Berlin.) Dec. 19, 1932, No. 35980. Convention date, Dec. 22, 1931. Class 39 (ii).] In an electric incandescent lamp of the type provided with two filaments, one of which can be connected to or disconnected from the supply by means of a switch incorporated in the cap, the fixed contact of the switch comprises a ring 8, Figs. 1 and 2, provided with a cut-away portion or peripheral notch 9, while the movable contact consists of an arm 12 pivoted on a sleeve 6 secured coaxially with the cylinder in the insulating base 5 of the cap. The upper end of the sleeve is riveted over to form the central contact of the cap and to secure the contact arm 12 between two metal plates 10, 11. One filament 2 is connected by wires 7, 14 respectively to the central contact and metal shell 4 of the cap, the filament 3 being connected to the common return 14 and by a wire 13 to the ring 8. The circuit of filament 3 is closed by the arm 12 making contact with the ring at the ends of the notch 9. Specifications 248,631 and 275,532, [both in Class 39 (ii), Electric lamps, Incandescent], are referred to. Reference has been directed by the Comptroller to Specification 321,360, [Class 39 (ii), Electric lamps, Incandescent].
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE398693X | 1931-12-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB398693A true GB398693A (en) | 1933-09-21 |
Family
ID=6397389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB35980/32A Expired GB398693A (en) | 1931-12-22 | 1932-12-19 | Improvements in electric incandescent lamps |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB398693A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3654512A (en) * | 1970-05-14 | 1972-04-04 | Truck Lite Co | Lamp with support for filament to extend life of filament and envelope filled with krypton and/or xenon |
-
1932
- 1932-12-19 GB GB35980/32A patent/GB398693A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3654512A (en) * | 1970-05-14 | 1972-04-04 | Truck Lite Co | Lamp with support for filament to extend life of filament and envelope filled with krypton and/or xenon |
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