GB1234762A - Detection apparatus - Google Patents

Detection apparatus

Info

Publication number
GB1234762A
GB1234762A GB5021867A GB5021867A GB1234762A GB 1234762 A GB1234762 A GB 1234762A GB 5021867 A GB5021867 A GB 5021867A GB 5021867 A GB5021867 A GB 5021867A GB 1234762 A GB1234762 A GB 1234762A
Authority
GB
United Kingdom
Prior art keywords
photo
magnetic field
cell
galvanometer
lamp
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
GB5021867A
Other languages
English (en)
Inventor
John Diver
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 GB5021867A priority Critical patent/GB1234762A/en
Priority to DE19681774444 priority patent/DE1774444A1/de
Priority to IL30246A priority patent/IL30246A0/xx
Priority to LU56333D priority patent/LU56333A1/xx
Priority to FR1571102D priority patent/FR1571102A/fr
Priority to CH960968A priority patent/CH495596A/fr
Priority to BE717228D priority patent/BE717228A/xx
Priority to NL6809085A priority patent/NL6809085A/xx
Publication of GB1234762A publication Critical patent/GB1234762A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL 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
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2405—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used
    • G08B13/2408—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting characterised by the tag technology used using ferromagnetic tags
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL 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
    • G08B13/2402—Electronic Article Surveillance [EAS], i.e. systems using tags for detecting removal of a tagged item from a secure area, e.g. tags for detecting shoplifting
    • G08B13/2465—Aspects related to the EAS system, e.g. system components other than tags
    • G08B13/2468—Antenna in system and the related signal processing
    • G08B13/2477—Antenna or antenna activator circuit

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Computer Security & Cryptography (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Burglar Alarm Systems (AREA)
GB5021867A 1967-06-27 1967-06-27 Detection apparatus Expired GB1234762A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
GB5021867A GB1234762A (en) 1967-06-27 1967-06-27 Detection apparatus
DE19681774444 DE1774444A1 (de) 1967-06-27 1968-06-20 UEberwachungsgeraet
IL30246A IL30246A0 (en) 1967-06-27 1968-06-24 Detection apparatus
LU56333D LU56333A1 (https=) 1967-06-27 1968-06-25
FR1571102D FR1571102A (https=) 1967-06-27 1968-06-26
CH960968A CH495596A (fr) 1967-06-27 1968-06-27 Appareil de détection
BE717228D BE717228A (https=) 1967-06-27 1968-06-27
NL6809085A NL6809085A (https=) 1967-06-27 1968-06-27

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB2953367 1967-06-27
GB5021867A GB1234762A (en) 1967-06-27 1967-06-27 Detection apparatus
GB3714667 1967-08-12
GB4322067 1967-09-22

Publications (1)

Publication Number Publication Date
GB1234762A true GB1234762A (en) 1971-06-09

Family

ID=27448766

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5021867A Expired GB1234762A (en) 1967-06-27 1967-06-27 Detection apparatus

Country Status (7)

Country Link
BE (1) BE717228A (https=)
CH (1) CH495596A (https=)
DE (1) DE1774444A1 (https=)
FR (1) FR1571102A (https=)
GB (1) GB1234762A (https=)
LU (1) LU56333A1 (https=)
NL (1) NL6809085A (https=)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2154350A (en) * 1984-02-17 1985-09-04 Standard Telephones Cables Ltd Preventing misuse of information stored on computer tapes and the like

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2154350A (en) * 1984-02-17 1985-09-04 Standard Telephones Cables Ltd Preventing misuse of information stored on computer tapes and the like

Also Published As

Publication number Publication date
LU56333A1 (https=) 1968-09-30
FR1571102A (https=) 1969-06-13
DE1774444A1 (de) 1971-06-24
CH495596A (fr) 1970-08-31
NL6809085A (https=) 1968-12-30
BE717228A (https=) 1968-12-02

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