FR1028914A - Dispositif photo-électrique - Google Patents

Dispositif photo-électrique

Info

Publication number
FR1028914A
FR1028914A FR1028914DA FR1028914A FR 1028914 A FR1028914 A FR 1028914A FR 1028914D A FR1028914D A FR 1028914DA FR 1028914 A FR1028914 A FR 1028914A
Authority
FR
France
Prior art keywords
photoelectric device
photoelectric
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
English (en)
Inventor
Kosta Petroff Koleff
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.)
DURAG APPBAU GmbH
Original Assignee
DURAG APPBAU GmbH
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 DURAG APPBAU GmbH filed Critical DURAG APPBAU GmbH
Application granted granted Critical
Publication of FR1028914A publication Critical patent/FR1028914A/fr
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
    • G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
    • G08B13/183—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
FR1028914D 1949-10-31 1950-10-30 Dispositif photo-électrique Expired FR1028914A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1028914X 1949-10-31

Publications (1)

Publication Number Publication Date
FR1028914A true FR1028914A (fr) 1953-05-28

Family

ID=7715392

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1028914D Expired FR1028914A (fr) 1949-10-31 1950-10-30 Dispositif photo-électrique

Country Status (1)

Country Link
FR (1) FR1028914A (fr)

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