GB309464A - Improvements in lighting units - Google Patents

Improvements in lighting units

Info

Publication number
GB309464A
GB309464A GB56928A GB56928A GB309464A GB 309464 A GB309464 A GB 309464A GB 56928 A GB56928 A GB 56928A GB 56928 A GB56928 A GB 56928A GB 309464 A GB309464 A GB 309464A
Authority
GB
United Kingdom
Prior art keywords
quartz
lighting units
content
lamp
unscreened
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
GB56928A
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.)
Thermal Syndicate Ltd
Original Assignee
Thermal Syndicate 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 Thermal Syndicate Ltd filed Critical Thermal Syndicate Ltd
Priority to GB56928A priority Critical patent/GB309464A/en
Publication of GB309464A publication Critical patent/GB309464A/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)
  • Glass Compositions (AREA)

Abstract

309,464. Thermal Syndicate, Ltd., and Paget, Sir R. A. S. Jan. 7, 1928. Low-pressure metallic-vapour apparatus.-A lighting unit approximating to daylight as to its ultra-violet content, and to a less degree to its visible content, comprises an unscreened metal-filament lamp 24 arranged within a circular quartz mercuryvapour lamp 23, the two lamps being enclosed by a bowl 3 of translucent fused silica or quartz. Specification 289,508, [Class 81 (ii), Medical &c. appliances 1, is referred to.
GB56928A 1928-01-07 1928-01-07 Improvements in lighting units Expired GB309464A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB56928A GB309464A (en) 1928-01-07 1928-01-07 Improvements in lighting units

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB56928A GB309464A (en) 1928-01-07 1928-01-07 Improvements in lighting units

Publications (1)

Publication Number Publication Date
GB309464A true GB309464A (en) 1929-04-08

Family

ID=9706677

Family Applications (1)

Application Number Title Priority Date Filing Date
GB56928A Expired GB309464A (en) 1928-01-07 1928-01-07 Improvements in lighting units

Country Status (1)

Country Link
GB (1) GB309464A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7347476B2 (en) 2005-03-31 2008-03-25 The Eastern Company Ramp door and frame assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7347476B2 (en) 2005-03-31 2008-03-25 The Eastern Company Ramp door and frame assembly

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