CH475613A - Device with a light barrier and an acoustic signal transmitter that can be controlled by the light barrier - Google Patents

Device with a light barrier and an acoustic signal transmitter that can be controlled by the light barrier

Info

Publication number
CH475613A
CH475613A CH339068A CH339068A CH475613A CH 475613 A CH475613 A CH 475613A CH 339068 A CH339068 A CH 339068A CH 339068 A CH339068 A CH 339068A CH 475613 A CH475613 A CH 475613A
Authority
CH
Switzerland
Prior art keywords
light barrier
controlled
acoustic signal
signal transmitter
barrier
Prior art date
Application number
CH339068A
Other languages
German (de)
Inventor
Alexander Forde Reginald
Original Assignee
Truck And Car Company Propriet
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 Truck And Car Company Propriet filed Critical Truck And Car Company Propriet
Publication of CH475613A publication Critical patent/CH475613A/en

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
    • 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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Time Recorders, Dirve Recorders, Access Control (AREA)
CH339068A 1967-03-08 1968-03-07 Device with a light barrier and an acoustic signal transmitter that can be controlled by the light barrier CH475613A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA671329 1967-03-08

Publications (1)

Publication Number Publication Date
CH475613A true CH475613A (en) 1969-07-15

Family

ID=25561070

Family Applications (1)

Application Number Title Priority Date Filing Date
CH339068A CH475613A (en) 1967-03-08 1968-03-07 Device with a light barrier and an acoustic signal transmitter that can be controlled by the light barrier

Country Status (3)

Country Link
CH (1) CH475613A (en)
FR (1) FR1556662A (en)
GB (1) GB1160496A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008053881A1 (en) 2008-10-30 2010-05-12 I.L.E.E. Ag Industrial Laser And Electronic Engineering Reflection barrier with surveying and / or localization function

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4410884A (en) * 1977-08-18 1983-10-18 Firma Aug. Winkhaus Alarm system
CN104766507A (en) * 2015-04-07 2015-07-08 张鹏 Automobile attack reminding device under simulation battlefield environment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008053881A1 (en) 2008-10-30 2010-05-12 I.L.E.E. Ag Industrial Laser And Electronic Engineering Reflection barrier with surveying and / or localization function

Also Published As

Publication number Publication date
FR1556662A (en) 1969-02-07
GB1160496A (en) 1969-08-06

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Legal Events

Date Code Title Description
PL Patent ceased