FR473390A - Device for switching on and off lighting devices by the effect of light and heat - Google Patents

Device for switching on and off lighting devices by the effect of light and heat

Info

Publication number
FR473390A
FR473390A FR473390DA FR473390A FR 473390 A FR473390 A FR 473390A FR 473390D A FR473390D A FR 473390DA FR 473390 A FR473390 A FR 473390A
Authority
FR
France
Prior art keywords
switching
heat
light
effect
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.)
Lux AB
Original Assignee
Lux AB
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 Lux AB filed Critical Lux AB
Application granted granted Critical
Publication of FR473390A publication Critical patent/FR473390A/en
Expired legal-status Critical Current

Links

FR473390D 1913-06-16 1914-06-12 Device for switching on and off lighting devices by the effect of light and heat Expired FR473390A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE473390X 1913-06-16

Publications (1)

Publication Number Publication Date
FR473390A true FR473390A (en) 1915-01-09

Family

ID=43351432

Family Applications (1)

Application Number Title Priority Date Filing Date
FR473390D Expired FR473390A (en) 1913-06-16 1914-06-12 Device for switching on and off lighting devices by the effect of light and heat

Country Status (1)

Country Link
FR (1) FR473390A (en)

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