FR665994A - Improvements to lighting devices - Google Patents

Improvements to lighting devices

Info

Publication number
FR665994A
FR665994A FR665994DA FR665994A FR 665994 A FR665994 A FR 665994A FR 665994D A FR665994D A FR 665994DA FR 665994 A FR665994 A FR 665994A
Authority
FR
France
Prior art keywords
lighting devices
lighting
devices
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
Other languages
French (fr)
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
Application granted granted Critical
Publication of FR665994A publication Critical patent/FR665994A/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)
FR665994D 1928-01-07 1928-12-17 Improvements to lighting devices Expired FR665994A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB665994X 1928-01-07

Publications (1)

Publication Number Publication Date
FR665994A true FR665994A (en) 1929-09-25

Family

ID=10491303

Family Applications (1)

Application Number Title Priority Date Filing Date
FR665994D Expired FR665994A (en) 1928-01-07 1928-12-17 Improvements to lighting devices

Country Status (1)

Country Link
FR (1) FR665994A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE757286C (en) * 1938-01-22 1952-10-06 Patra Patent Treuhand Irradiation arrangement for producing browning without reddening

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE757286C (en) * 1938-01-22 1952-10-06 Patra Patent Treuhand Irradiation arrangement for producing browning without reddening

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