GB522955A - Improvements in or relating to lanterns for electric lamps - Google Patents

Improvements in or relating to lanterns for electric lamps

Info

Publication number
GB522955A
GB522955A GB3707538A GB3707538A GB522955A GB 522955 A GB522955 A GB 522955A GB 3707538 A GB3707538 A GB 3707538A GB 3707538 A GB3707538 A GB 3707538A GB 522955 A GB522955 A GB 522955A
Authority
GB
United Kingdom
Prior art keywords
lanterns
relating
electric lamps
bertram
refracting
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
GB3707538A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB3707538A priority Critical patent/GB522955A/en
Publication of GB522955A publication Critical patent/GB522955A/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
    • F21S13/00—Non-electric lighting devices or systems employing a point-like light source; Non-electric lighting devices or systems employing a light source of unspecified shape

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Variable Magnification In Projection-Type Copying Machines (AREA)
  • Optical Head (AREA)

Abstract

522,955. Lighting fitting. BRITISH THOMSONHOUSTON CO., Ltd., and BERTRAM, J. Dec. 20, 1938, No. 37075. [Class 75 (iv)] A lamp giving one way illumination is made up of a refracting half B and a reflecting half 4, 5, 6. The halves are taken from lamps described in Specifications 491,257 and 516,012 respectively. Specification 485,801 also is referred to.
GB3707538A 1938-12-20 1938-12-20 Improvements in or relating to lanterns for electric lamps Expired GB522955A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3707538A GB522955A (en) 1938-12-20 1938-12-20 Improvements in or relating to lanterns for electric lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3707538A GB522955A (en) 1938-12-20 1938-12-20 Improvements in or relating to lanterns for electric lamps

Publications (1)

Publication Number Publication Date
GB522955A true GB522955A (en) 1940-07-02

Family

ID=10393520

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3707538A Expired GB522955A (en) 1938-12-20 1938-12-20 Improvements in or relating to lanterns for electric lamps

Country Status (1)

Country Link
GB (1) GB522955A (en)

Similar Documents

Publication Publication Date Title
GB536563A (en) Improvements in or relating to illuminating devices
GB522955A (en) Improvements in or relating to lanterns for electric lamps
GB467411A (en) Improvements in or relating to lamps for shop window illumination
GB514009A (en) Improvements in reflectors for lamps
GB522502A (en) Improvements in lighting fittings
GB251801A (en) Improvements in electric light fittings
GB515651A (en) Improvements in refractors for street lighting and other purposes
GB511783A (en) Improvements in or relating to light-distributing and directing devices
FR929289A (en) Incandescent projection lamp with reflector
GB539472A (en) Improvements in of relating to street lighting fittings
GB477758A (en) Improvements in and relating to electric incandescent lamps
GB344865A (en) Improvements in and relating to incandescent electric lamps
GB505897A (en) Improvements in and relating to lanterns for electric lamps
GB518217A (en) Improvements in and relating to electric lighting fittings
GB517267A (en) Improvements in or relating to lighting fittings
CA373404A (en) Reflecting incandescent lamp
FR861094A (en) Multiple light incandescent lamp with combination switch
GB520114A (en) Improvements in or relating to lighting fittings
GB516927A (en) Improvements in rear lights for cycles or the like
AU104857B2 (en) Manufacture of light diffusing glass articles, more particularly electric lamp bulbs, flashed glasses, lampshades andthe like
GB514936A (en) An improved light projecting system
GB428057A (en) Improvements in or relating to illuminating devices
CA376679A (en) Incandescent lamp and flasher
GB760885A (en) A lamp for the illumination of surgical operations
GB524773A (en) Improvements in luminous bowl electric lighting fixture