GB529377A - Improvements in optical projection apparatus - Google Patents

Improvements in optical projection apparatus

Info

Publication number
GB529377A
GB529377A GB13495/39A GB1349539A GB529377A GB 529377 A GB529377 A GB 529377A GB 13495/39 A GB13495/39 A GB 13495/39A GB 1349539 A GB1349539 A GB 1349539A GB 529377 A GB529377 A GB 529377A
Authority
GB
United Kingdom
Prior art keywords
projection apparatus
optical projection
lamps
axis
comptroller
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
GB13495/39A
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.)
WALTER ROBERT STEVENS
General Electric Co PLC
Original Assignee
WALTER ROBERT STEVENS
General Electric Co PLC
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 WALTER ROBERT STEVENS, General Electric Co PLC filed Critical WALTER ROBERT STEVENS
Priority to GB13495/39A priority Critical patent/GB529377A/en
Publication of GB529377A publication Critical patent/GB529377A/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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

529,377. Lamps. GENERAL ELECTRIC CO., Ltd., FRANCIS, V. J., and STEVENS, W. R. May 5, 1939, No. 13495. [Class 75 (iv)] H.P.M.V. lamps are mounted with their axis coincident with the axis of the reflector. The lamps are two ended and have a defined ratio of power dissipated to length of discharge. Reference has been directed by the Comptroller to Specification 455,971.
GB13495/39A 1939-05-05 1939-05-05 Improvements in optical projection apparatus Expired GB529377A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB13495/39A GB529377A (en) 1939-05-05 1939-05-05 Improvements in optical projection apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB13495/39A GB529377A (en) 1939-05-05 1939-05-05 Improvements in optical projection apparatus

Publications (1)

Publication Number Publication Date
GB529377A true GB529377A (en) 1940-11-20

Family

ID=10023999

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13495/39A Expired GB529377A (en) 1939-05-05 1939-05-05 Improvements in optical projection apparatus

Country Status (1)

Country Link
GB (1) GB529377A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1026099B (en) * 1954-12-21 1958-03-13 Lytax Werke G M B H Process to achieve the greatest possible light output in projection devices and the like. like

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1026099B (en) * 1954-12-21 1958-03-13 Lytax Werke G M B H Process to achieve the greatest possible light output in projection devices and the like. like

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