GB497587A - Improvements in electric incandescent lamps - Google Patents
Improvements in electric incandescent lampsInfo
- Publication number
- GB497587A GB497587A GB17081/37A GB1708137A GB497587A GB 497587 A GB497587 A GB 497587A GB 17081/37 A GB17081/37 A GB 17081/37A GB 1708137 A GB1708137 A GB 1708137A GB 497587 A GB497587 A GB 497587A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bulb
- coating
- incandescent lamps
- june
- lamp
- 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
- H01K1/02—Incandescent bodies
- H01K1/14—Incandescent bodies characterised by the shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V11/00—Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Resistance Heating (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
497,587. Electric incandescent lamps. ROVER, W. June 18, 1937, No. 17081. Convention date, June 18, 1936. [Class 39 (ii)] A lamp for emergency illumination during air-raids is provided with a bulb which, except for a small clear window H, is coated with a substantially opaque coating B applied directly to the bulb, and has a metal filament L of the smallest practicable diameter, for example 0À011 mm. in the case of a tungsten filament, and of such a length that its temperature does not exceed 1500 C. when the lamp is operated on mains of the voltage prescribed for it. Preferably the bulb is first provided with a coating of white paint, lacquer, or varnish upon which is applied a black coating of the same material. Specification 247,148, [Class 39 (ii)], is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE497587X | 1936-06-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB497587A true GB497587A (en) | 1938-12-19 |
Family
ID=6545199
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB17081/37A Expired GB497587A (en) | 1936-06-18 | 1937-06-18 | Improvements in electric incandescent lamps |
Country Status (4)
Country | Link |
---|---|
US (1) | US2182904A (en) |
BE (1) | BE422151A (en) |
FR (1) | FR823207A (en) |
GB (1) | GB497587A (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4883942A (en) * | 1988-03-21 | 1989-11-28 | Robatherm Products | Low voltage heating element for portable tools |
ES2065736T3 (en) * | 1991-08-17 | 1995-02-16 | Koch Wilhelm Gmbh | LIGHTING MEDIA. |
DE19857076A1 (en) * | 1998-12-10 | 2000-06-15 | Volkswagen Ag | Incandescent lamp, for a car headlight, has a bulb coating which is black at the bulb side and silver at the opposite side |
US6860061B2 (en) * | 2002-03-18 | 2005-03-01 | University Of Delaware | Apparatus for attracting mosquitoes and not attracting beneficial insects to electronic bug killers |
US20070194717A1 (en) * | 2006-02-17 | 2007-08-23 | Palomar Medical Technologies, Inc. | Lamp for use in a tissue treatment device |
-
0
- BE BE422151D patent/BE422151A/xx unknown
-
1937
- 1937-06-17 FR FR823207D patent/FR823207A/en not_active Expired
- 1937-06-18 GB GB17081/37A patent/GB497587A/en not_active Expired
- 1937-06-18 US US148848A patent/US2182904A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR823207A (en) | 1938-01-17 |
BE422151A (en) | |
US2182904A (en) | 1939-12-12 |
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