FR998636A - Electrical protection device - Google Patents

Electrical protection device

Info

Publication number
FR998636A
FR998636A FR998636DA FR998636A FR 998636 A FR998636 A FR 998636A FR 998636D A FR998636D A FR 998636DA FR 998636 A FR998636 A FR 998636A
Authority
FR
France
Prior art keywords
protection device
electrical protection
electrical
protection
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)
Inventor
Harry Elias Claesson
Karl Lennart Johansson
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 filed Critical
Application granted granted Critical
Publication of FR998636A publication Critical patent/FR998636A/en
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
    • G08B13/22—Electrical actuation
    • G08B13/24—Electrical actuation by interference with electromagnetic field distribution
    • G08B13/2491—Intrusion detection systems, i.e. where the body of an intruder causes the interference with the electromagnetic field

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
FR998636D 1948-09-30 1949-09-29 Electrical protection device Expired FR998636A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE998636X 1948-09-30

Publications (1)

Publication Number Publication Date
FR998636A true FR998636A (en) 1952-01-21

Family

ID=20418437

Family Applications (1)

Application Number Title Priority Date Filing Date
FR998636D Expired FR998636A (en) 1948-09-30 1949-09-29 Electrical protection device

Country Status (1)

Country Link
FR (1) FR998636A (en)

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