GB348457A - - Google Patents

Info

Publication number
GB348457A
GB348457A GB21275/30A GB2127530A GB348457A GB 348457 A GB348457 A GB 348457A GB 21275/30 A GB21275/30 A GB 21275/30A GB 2127530 A GB2127530 A GB 2127530A GB 348457 A GB348457 A GB 348457A
Authority
GB
United Kingdom
Prior art keywords
filament
july
ufer
broadway
assignees
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
GB21275/30A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB348457A publication Critical patent/GB348457A/en
Expired legal-status Critical Current

Links

Classifications

    • 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)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Photovoltaic Devices (AREA)

Abstract

348,457. Reflectors. INTERNATIONAL GENERAL ELECTRIC CO., Inc., 120, Broadway, New York, U.S.A.- (Assignees of Allgemeine Elektricitõts-Ges.; 2, Friedrich Karl-Ufer, Berlin.) July 14, 1930, No. 21275. Convention date, July 15, 1929. [Class 75 (ii).] The surface of a reflector a for an electric lamp bulb b having an annular filament c is generated by rotating about the axis of symmetry of the filament a curve having its focus approximately coinciding with the nearest of the intersection points of the filament with the plane containing the generator.
GB21275/30A 1929-07-15 1930-07-14 Expired GB348457A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE348457T 1929-07-15

Publications (1)

Publication Number Publication Date
GB348457A true GB348457A (en) 1931-05-14

Family

ID=31895230

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21275/30A Expired GB348457A (en) 1929-07-15 1930-07-14

Country Status (1)

Country Link
GB (1) GB348457A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2619581A (en) * 1948-10-22 1952-11-25 Percival H Mitchell Street lighting reflector with parabolic upward curvature formation
US2636143A (en) * 1949-05-21 1953-04-21 Percival H Mitchell Reflecting surface for incandescent lamps

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2619581A (en) * 1948-10-22 1952-11-25 Percival H Mitchell Street lighting reflector with parabolic upward curvature formation
US2636143A (en) * 1949-05-21 1953-04-21 Percival H Mitchell Reflecting surface for incandescent lamps

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