ITMI20032386A1 - Dispositivo rilevatore di variazione della luminosita' - Google Patents

Dispositivo rilevatore di variazione della luminosita'

Info

Publication number
ITMI20032386A1
ITMI20032386A1 ITMI20032386A ITMI20032386A1 IT MI20032386 A1 ITMI20032386 A1 IT MI20032386A1 IT MI20032386 A ITMI20032386 A IT MI20032386A IT MI20032386 A1 ITMI20032386 A1 IT MI20032386A1
Authority
IT
Italy
Prior art keywords
brightness
variation
device detector
detector
Prior art date
Application number
Other languages
English (en)
Inventor
Claudio Ricci
Original Assignee
Microhard Srl
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 Microhard Srl filed Critical Microhard Srl
Priority to ITMI20032386 priority Critical patent/ITMI20032386A1/it
Priority to EP04028609A priority patent/EP1538578A1/en
Publication of ITMI20032386A1 publication Critical patent/ITMI20032386A1/it

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
    • G08B13/189—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
    • G08B13/1895—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using light change detection systems
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B13/00—Burglar, theft or intruder alarms
    • G08B13/02—Mechanical actuation
    • G08B13/14—Mechanical actuation by lifting or attempted removal of hand-portable articles
    • G08B13/1481—Mechanical actuation by lifting or attempted removal of hand-portable articles with optical detection

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Selective Calling Equipment (AREA)
ITMI20032386 2003-12-05 2003-12-05 Dispositivo rilevatore di variazione della luminosita' ITMI20032386A1 (it)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ITMI20032386 ITMI20032386A1 (it) 2003-12-05 2003-12-05 Dispositivo rilevatore di variazione della luminosita'
EP04028609A EP1538578A1 (en) 2003-12-05 2004-12-02 Device for sensing ambient light intensity variation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI20032386 ITMI20032386A1 (it) 2003-12-05 2003-12-05 Dispositivo rilevatore di variazione della luminosita'

Publications (1)

Publication Number Publication Date
ITMI20032386A1 true ITMI20032386A1 (it) 2005-06-06

Family

ID=34452270

Family Applications (1)

Application Number Title Priority Date Filing Date
ITMI20032386 ITMI20032386A1 (it) 2003-12-05 2003-12-05 Dispositivo rilevatore di variazione della luminosita'

Country Status (2)

Country Link
EP (1) EP1538578A1 (it)
IT (1) ITMI20032386A1 (it)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900012729A1 (it) * 2019-07-24 2021-01-24 Petersen Fabio Rocco Valentini Dispositivo antifurto per oggetti da parete

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6239501Y2 (it) * 1975-06-18 1987-10-08
JPH09274692A (ja) * 1996-04-03 1997-10-21 Tamura Seisakusho Co Ltd 警報装置
GB2313980B (en) * 1996-06-05 1999-04-28 Yale Security Prod Ltd Radio-type burglar alarm systems
US5936523A (en) * 1998-04-24 1999-08-10 West; Joe F. Device and method for detecting unwanted disposition of the contents of an enclosure
CA2313652A1 (en) * 1999-07-09 2001-01-09 Paul Still Security device and method for detecting the unauthorized opening of containers

Also Published As

Publication number Publication date
EP1538578A1 (en) 2005-06-08

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