GB357917A - Improvements in stopping-down hoods for reflector lamps - Google Patents

Improvements in stopping-down hoods for reflector lamps

Info

Publication number
GB357917A
GB357917A GB4000/31A GB400031A GB357917A GB 357917 A GB357917 A GB 357917A GB 4000/31 A GB4000/31 A GB 4000/31A GB 400031 A GB400031 A GB 400031A GB 357917 A GB357917 A GB 357917A
Authority
GB
United Kingdom
Prior art keywords
screen
reflector
lamps
zeiss
feb
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
GB4000/31A
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.)
Carl Zeiss AG
Original Assignee
Carl Zeiss AG
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 Carl Zeiss AG filed Critical Carl Zeiss AG
Publication of GB357917A publication Critical patent/GB357917A/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
    • F21S41/20—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by refractors, transparent cover plates, light guides or filters
    • F21S41/28—Cover glass

Landscapes

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

Abstract

357,917. Vehicle lamps. ZEISS, C. [Firm of], Carl-Zeiss-Strasse, Jena, Germany. Feb. 9, 1931, No. 4000. Convention date, Feb. 10, 1930. Addition to 336,546, [Class 75 (iv), Lamps &c., Kinds &c. of]. [Class 75 (iv).] Lantern screens.-In a vehicle lamp in which a screen is longitudinally adjustable between the source of light and the reflector and the upper and lower halves of the screen are formed by semiannular transparent Fresnel lenses a, b arranged respectively with their refracting surfaces facing away from and towards the apex of the reflector, as described in the parent Specification, the lateral parts of the two halves of the screen are formed with axial wedge-shaped steps c arranged with their bases c<1> directed downwardly so that rays of light passing through these parts of the screen are refracted downwardly before falling on the reflector. The steps c are preferably formed on the inner surface of the screen.
GB4000/31A 1930-02-10 1931-02-09 Improvements in stopping-down hoods for reflector lamps Expired GB357917A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE357917X 1930-02-10

Publications (1)

Publication Number Publication Date
GB357917A true GB357917A (en) 1931-10-01

Family

ID=6290689

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4000/31A Expired GB357917A (en) 1930-02-10 1931-02-09 Improvements in stopping-down hoods for reflector lamps

Country Status (1)

Country Link
GB (1) GB357917A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3096026A (en) * 1961-01-09 1963-07-02 Signal Stat Corp Cab lamp for automotive vehicles

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3096026A (en) * 1961-01-09 1963-07-02 Signal Stat Corp Cab lamp for automotive vehicles

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