GB497587A - Improvements in electric incandescent lamps - Google Patents

Improvements in electric incandescent lamps

Info

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
Application number
GB17081/37A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB497587A publication Critical patent/GB497587A/en
Expired legal-status Critical Current

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.
GB17081/37A 1936-06-18 1937-06-18 Improvements in electric incandescent lamps Expired GB497587A (en)

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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
FR823207A (en) 1938-01-17
BE422151A (en)
US2182904A (en) 1939-12-12

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