GB428057A - Improvements in or relating to illuminating devices - Google Patents

Improvements in or relating to illuminating devices

Info

Publication number
GB428057A
GB428057A GB3005933A GB3005933A GB428057A GB 428057 A GB428057 A GB 428057A GB 3005933 A GB3005933 A GB 3005933A GB 3005933 A GB3005933 A GB 3005933A GB 428057 A GB428057 A GB 428057A
Authority
GB
United Kingdom
Prior art keywords
reflector
reflectors
envelope
light source
relating
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
GB3005933A
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 GB3005933A priority Critical patent/GB428057A/en
Publication of GB428057A publication Critical patent/GB428057A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design

Landscapes

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

Abstract

428,057. Overhead &c. lamps; reflectors. DOWNER, G. V., 5, Lansdowne Place, Guilford Street, St. Pancras, London. Oct. 30, 1933, Nos. 30059 and 30937. [Classes 75 (ii) and 75 (iv)] An auxiliary reflector 4, which is arranged within a concave primary reflector 2, so. as to surround the envelope 1 or support for the light source 5 and to extend to the inner surface of the reflector 2, is arranged so close to the light source that the distance of the centre of gravity of the source is not more than half the greatest diameter of the orifice through which the envelope 1 or support passes. An additional reflector 6 may be provided as shown in Fig. 1, or the upper part of the bulb 1 may be reflecting. In Fig. 3, the reflectors 2, 4 form a single reflector associated with two transparent or translucent diffusing bowls 3, 8 and an additional reflector 11 is provided. Specification 404,695 is referred to in the Provisional Specifications.
GB3005933A 1933-10-30 1933-10-30 Improvements in or relating to illuminating devices Expired GB428057A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3005933A GB428057A (en) 1933-10-30 1933-10-30 Improvements in or relating to illuminating devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3005933A GB428057A (en) 1933-10-30 1933-10-30 Improvements in or relating to illuminating devices

Publications (1)

Publication Number Publication Date
GB428057A true GB428057A (en) 1935-04-30

Family

ID=10301586

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3005933A Expired GB428057A (en) 1933-10-30 1933-10-30 Improvements in or relating to illuminating devices

Country Status (1)

Country Link
GB (1) GB428057A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5988062A (en) * 1995-04-28 1999-11-23 Riso Kagaku Corporation Light radiating device of heatsensitive perforating device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5988062A (en) * 1995-04-28 1999-11-23 Riso Kagaku Corporation Light radiating device of heatsensitive perforating device

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