GB397698A - Improvements relating to portable lamps - Google Patents

Improvements relating to portable lamps

Info

Publication number
GB397698A
GB397698A GB30195/32A GB3019532A GB397698A GB 397698 A GB397698 A GB 397698A GB 30195/32 A GB30195/32 A GB 30195/32A GB 3019532 A GB3019532 A GB 3019532A GB 397698 A GB397698 A GB 397698A
Authority
GB
United Kingdom
Prior art keywords
reflector
light
bulb
improvements relating
portable lamps
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
GB30195/32A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB30195/32A priority Critical patent/GB397698A/en
Publication of GB397698A publication Critical patent/GB397698A/en
Expired legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21L—LIGHTING DEVICES OR SYSTEMS THEREOF, BEING PORTABLE OR SPECIALLY ADAPTED FOR TRANSPORTATION
    • F21L4/00—Electric lighting devices with self-contained electric batteries or cells

Landscapes

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

Abstract

397,698. Reflectors. WALKEY, W. R., 66, Victoria Street, London. Oct. 27, 1932, No. 30195. [Class 75 (ii).] A portable lamp, for use in mines and for other purposes, is provided with a reflector 7, the surface of which comprises a central surface of revolution 14 around the source of light, smoothly merging into four curved surfaces 15 having a curvature decreasing towards their outer edges. The rear surface 14 is spherical. A hollow square extension 11 of the reflector fits on a square metal block 9 into which the lamp bulb 6 screws. The filament of the bulb 6 is arranged in the plane in which the surface 14 merges into the surfaces 15. A light-diffusing screen 13 of the type described in Specification 358,237 may be provided. Dimensions for the reflector are given.
GB30195/32A 1932-10-27 1932-10-27 Improvements relating to portable lamps Expired GB397698A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB30195/32A GB397698A (en) 1932-10-27 1932-10-27 Improvements relating to portable lamps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB30195/32A GB397698A (en) 1932-10-27 1932-10-27 Improvements relating to portable lamps

Publications (1)

Publication Number Publication Date
GB397698A true GB397698A (en) 1933-08-31

Family

ID=10303773

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30195/32A Expired GB397698A (en) 1932-10-27 1932-10-27 Improvements relating to portable lamps

Country Status (1)

Country Link
GB (1) GB397698A (en)

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