GB176170A - Electrical apparatus for protection against burglary and the like - Google Patents

Electrical apparatus for protection against burglary and the like

Info

Publication number
GB176170A
GB176170A GB3544620A GB3544620A GB176170A GB 176170 A GB176170 A GB 176170A GB 3544620 A GB3544620 A GB 3544620A GB 3544620 A GB3544620 A GB 3544620A GB 176170 A GB176170 A GB 176170A
Authority
GB
United Kingdom
Prior art keywords
protection against
electrical apparatus
against burglary
burglary
electrical
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
GB3544620A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB3544620A priority Critical patent/GB176170A/en
Publication of GB176170A publication Critical patent/GB176170A/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
    • G08B13/18—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)
GB3544620A 1920-12-16 1920-12-16 Electrical apparatus for protection against burglary and the like Expired GB176170A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3544620A GB176170A (en) 1920-12-16 1920-12-16 Electrical apparatus for protection against burglary and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3544620A GB176170A (en) 1920-12-16 1920-12-16 Electrical apparatus for protection against burglary and the like

Publications (1)

Publication Number Publication Date
GB176170A true GB176170A (en) 1922-03-09

Family

ID=10377820

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3544620A Expired GB176170A (en) 1920-12-16 1920-12-16 Electrical apparatus for protection against burglary and the like

Country Status (1)

Country Link
GB (1) GB176170A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157468A (en) * 1984-04-11 1985-10-23 Wang Chun Jong A method and device for detection of a blanket or the like being kicked off the body of a sleeping person

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157468A (en) * 1984-04-11 1985-10-23 Wang Chun Jong A method and device for detection of a blanket or the like being kicked off the body of a sleeping person

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