DE718520C - Elektrische Gluehlampe fuer Flaechenbeleuchtung - Google Patents

Elektrische Gluehlampe fuer Flaechenbeleuchtung

Info

Publication number
DE718520C
DE718520C DEN41447D DEN0041447D DE718520C DE 718520 C DE718520 C DE 718520C DE N41447 D DEN41447 D DE N41447D DE N0041447 D DEN0041447 D DE N0041447D DE 718520 C DE718520 C DE 718520C
Authority
DE
Germany
Prior art keywords
axis
lamp according
piston
mirrored
incandescent 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
DEN41447D
Other languages
German (de)
English (en)
Inventor
Jan Bergmans
Hendrik Van Der Veen
Wilhelmus Lambertus Vervest
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.)
Philips Intellectual Property and Standards GmbH
Original Assignee
Philips Patentverwaltung GmbH
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 Philips Patentverwaltung GmbH filed Critical Philips Patentverwaltung GmbH
Application granted granted Critical
Publication of DE718520C publication Critical patent/DE718520C/de
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/28—Envelopes; Vessels
    • H01K1/32—Envelopes; Vessels provided with coatings on the walls; Vessels or coatings thereon characterised by the material thereof
    • H01K1/325—Reflecting coating
    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Fastening Of Light Sources Or Lamp Holders (AREA)
DEN41447D 1936-12-18 1937-12-18 Elektrische Gluehlampe fuer Flaechenbeleuchtung Expired DE718520C (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL205355X 1936-12-18

Publications (1)

Publication Number Publication Date
DE718520C true DE718520C (de) 1942-03-13

Family

ID=19778522

Family Applications (1)

Application Number Title Priority Date Filing Date
DEN41447D Expired DE718520C (de) 1936-12-18 1937-12-18 Elektrische Gluehlampe fuer Flaechenbeleuchtung

Country Status (7)

Country Link
US (1) US2144521A (en:Method)
BE (1) BE425306A (en:Method)
CH (1) CH205355A (en:Method)
DE (1) DE718520C (en:Method)
FR (1) FR830957A (en:Method)
GB (1) GB513249A (en:Method)
NL (1) NL51560C (en:Method)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2441823A (en) * 1943-02-01 1948-05-18 Westinghouse Electric Corp Reflector lamp and optical system
US2622222A (en) * 1951-04-27 1952-12-16 Westinghouse Electric Corp Infrared heating and cooking lamp
US4379249A (en) * 1980-08-20 1983-04-05 Duro-Test, Corporation Incandescent lamp with ellipsoidal envelope and infrared reflector

Also Published As

Publication number Publication date
NL51560C (en:Method)
GB513249A (en) 1939-10-09
FR830957A (fr) 1938-08-16
CH205355A (de) 1939-06-15
US2144521A (en) 1939-01-17
BE425306A (en:Method)

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