FR675508A - Improvements to electric projectors - Google Patents

Improvements to electric projectors

Info

Publication number
FR675508A
FR675508A FR675508DA FR675508A FR 675508 A FR675508 A FR 675508A FR 675508D A FR675508D A FR 675508DA FR 675508 A FR675508 A FR 675508A
Authority
FR
France
Prior art keywords
projectors
electric
electric projectors
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
Other languages
French (fr)
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.)
GRIMMEISEN ET CIE G
Original Assignee
GRIMMEISEN ET CIE G
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 GRIMMEISEN ET CIE G filed Critical GRIMMEISEN ET CIE G
Application granted granted Critical
Publication of FR675508A publication Critical patent/FR675508A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S10/00—Lighting devices or systems producing a varying lighting effect
    • 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
    • F21V19/00—Fastening of light sources or lamp holders

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
FR675508D 1929-05-22 1929-05-22 Improvements to electric projectors Expired FR675508A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR675508T 1929-05-22

Publications (1)

Publication Number Publication Date
FR675508A true FR675508A (en) 1930-02-11

Family

ID=9019388

Family Applications (1)

Application Number Title Priority Date Filing Date
FR675508D Expired FR675508A (en) 1929-05-22 1929-05-22 Improvements to electric projectors

Country Status (1)

Country Link
FR (1) FR675508A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4251856A (en) * 1979-05-18 1981-02-17 Logan Michael M Image projecting device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4251856A (en) * 1979-05-18 1981-02-17 Logan Michael M Image projecting device

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