GB2355329B - Automatic doorbell device - Google Patents

Automatic doorbell device

Info

Publication number
GB2355329B
GB2355329B GB9922748A GB9922748A GB2355329B GB 2355329 B GB2355329 B GB 2355329B GB 9922748 A GB9922748 A GB 9922748A GB 9922748 A GB9922748 A GB 9922748A GB 2355329 B GB2355329 B GB 2355329B
Authority
GB
United Kingdom
Prior art keywords
doorbell device
automatic doorbell
automatic
doorbell
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 - Fee Related
Application number
GB9922748A
Other versions
GB2355329A (en
GB9922748D0 (en
Inventor
Ian Sanderson
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 GB9922748A priority Critical patent/GB2355329B/en
Publication of GB9922748D0 publication Critical patent/GB9922748D0/en
Publication of GB2355329A publication Critical patent/GB2355329A/en
Application granted granted Critical
Publication of GB2355329B publication Critical patent/GB2355329B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B3/00—Audible signalling systems; Audible personal calling systems
    • G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
    • 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
    • G08B13/19—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 infrared-radiation detection systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/04—Systems determining the presence of a target
GB9922748A 1999-09-27 1999-09-27 Automatic doorbell device Expired - Fee Related GB2355329B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9922748A GB2355329B (en) 1999-09-27 1999-09-27 Automatic doorbell device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9922748A GB2355329B (en) 1999-09-27 1999-09-27 Automatic doorbell device

Publications (3)

Publication Number Publication Date
GB9922748D0 GB9922748D0 (en) 1999-11-24
GB2355329A GB2355329A (en) 2001-04-18
GB2355329B true GB2355329B (en) 2004-04-07

Family

ID=10861617

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9922748A Expired - Fee Related GB2355329B (en) 1999-09-27 1999-09-27 Automatic doorbell device

Country Status (1)

Country Link
GB (1) GB2355329B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102034325A (en) * 2010-12-17 2011-04-27 黄勇 Infrared induction type electronic Dingdong doorbell
CN106548577A (en) * 2017-01-20 2017-03-29 周芸 Infrared human body is close to electronic type ding-dong doorbell

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3774191A (en) * 1972-02-14 1973-11-20 El Sig Lab Inc Proximity alarm circuit for entrance annunciators
GB2016141A (en) * 1978-03-08 1979-09-19 Kasper Instruments Photodetector system
US4236147A (en) * 1977-12-09 1980-11-25 Noel Calvin Automatic doorbell
GB2195763A (en) * 1986-09-13 1988-04-13 Theodoros Mastichiadis Water tap
GB2264380A (en) * 1992-02-21 1993-08-25 Gordon Stokes Indoor alert signal device for outdoor intruders or visitors

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3774191A (en) * 1972-02-14 1973-11-20 El Sig Lab Inc Proximity alarm circuit for entrance annunciators
US4236147A (en) * 1977-12-09 1980-11-25 Noel Calvin Automatic doorbell
GB2016141A (en) * 1978-03-08 1979-09-19 Kasper Instruments Photodetector system
GB2195763A (en) * 1986-09-13 1988-04-13 Theodoros Mastichiadis Water tap
GB2264380A (en) * 1992-02-21 1993-08-25 Gordon Stokes Indoor alert signal device for outdoor intruders or visitors

Also Published As

Publication number Publication date
GB2355329A (en) 2001-04-18
GB9922748D0 (en) 1999-11-24

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20110927