GB517450A - Improvements in electric lamp fittings - Google Patents

Improvements in electric lamp fittings

Info

Publication number
GB517450A
GB517450A GB2249838A GB2249838A GB517450A GB 517450 A GB517450 A GB 517450A GB 2249838 A GB2249838 A GB 2249838A GB 2249838 A GB2249838 A GB 2249838A GB 517450 A GB517450 A GB 517450A
Authority
GB
United Kingdom
Prior art keywords
elements
opal
bells
matt
electric lamp
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
GB2249838A
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 GB2249838A priority Critical patent/GB517450A/en
Publication of GB517450A publication Critical patent/GB517450A/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
    • F21V3/00—Globes; Bowls; Cover glasses

Abstract

517,450. Lighting fittings. HIRSCH, E. July 28, 1938, No. 22498. [Class 75 (ii)] An electric lamp fitting comprises upper and lower glass bells, A, B preferably of parabolic cross-section and an intermediate glass member C of substantially V- or U-shaped cross-section detachably secured together coaxially by U-sectioned rings F so that any one of the three elements A, B, C may be replaced by another of the same size and configuration but of different illuminating characteristics. Upper and lower bells for example may be used having mirrored opal, glassenamelled or matt surfaces while the intermediate member may have one half of its surface provided with a specular lining S or transparent while the other half surface is opal or matt. The elements have the same diameter d at their grooved contacting surfaces so that the element C can be inverted. The bulb D may be arranged at the focus of the upper or lower bell or in an intermediate position. The provisional. Specification states that the lamp fitting may comprise upper and lower elements only.
GB2249838A 1938-07-28 1938-07-28 Improvements in electric lamp fittings Expired GB517450A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2249838A GB517450A (en) 1938-07-28 1938-07-28 Improvements in electric lamp fittings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2249838A GB517450A (en) 1938-07-28 1938-07-28 Improvements in electric lamp fittings

Publications (1)

Publication Number Publication Date
GB517450A true GB517450A (en) 1940-01-30

Family

ID=10180364

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2249838A Expired GB517450A (en) 1938-07-28 1938-07-28 Improvements in electric lamp fittings

Country Status (1)

Country Link
GB (1) GB517450A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2232757A (en) * 1989-06-09 1990-12-19 Starlowe Lighting & Design Lim A cover for light fittings
EP2020563A1 (en) * 2007-08-02 2009-02-04 Hartmut S. Engel Lighting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2232757A (en) * 1989-06-09 1990-12-19 Starlowe Lighting & Design Lim A cover for light fittings
EP2020563A1 (en) * 2007-08-02 2009-02-04 Hartmut S. Engel Lighting device

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