FR677622A - Improvements to projectors including incandescent electric lamps - Google Patents

Improvements to projectors including incandescent electric lamps

Info

Publication number
FR677622A
FR677622A FR677622DA FR677622A FR 677622 A FR677622 A FR 677622A FR 677622D A FR677622D A FR 677622DA FR 677622 A FR677622 A FR 677622A
Authority
FR
France
Prior art keywords
electric lamps
incandescent electric
including incandescent
projectors including
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.)
MACHAL PROJECTEURS
Original Assignee
MACHAL PROJECTEURS
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 MACHAL PROJECTEURS filed Critical MACHAL PROJECTEURS
Application granted granted Critical
Publication of FR677622A publication Critical patent/FR677622A/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
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/33—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature
    • F21S41/331—Multi-surface reflectors, e.g. reflectors with facets or reflectors with portions of different curvature the reflector consisting of complete annular areas

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
FR677622D 1928-06-30 1929-06-29 Improvements to projectors including incandescent electric lamps Expired FR677622A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE677622X 1928-06-30

Publications (1)

Publication Number Publication Date
FR677622A true FR677622A (en) 1930-03-12

Family

ID=3877650

Family Applications (1)

Application Number Title Priority Date Filing Date
FR677622D Expired FR677622A (en) 1928-06-30 1929-06-29 Improvements to projectors including incandescent electric lamps

Country Status (1)

Country Link
FR (1) FR677622A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2402830A1 (en) * 1977-09-12 1979-04-06 Sassmannshausen Knut HEADLIGHT

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2402830A1 (en) * 1977-09-12 1979-04-06 Sassmannshausen Knut HEADLIGHT

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