GB1512667A - Light barrier - Google Patents

Light barrier

Info

Publication number
GB1512667A
GB1512667A GB33026/75A GB3302675A GB1512667A GB 1512667 A GB1512667 A GB 1512667A GB 33026/75 A GB33026/75 A GB 33026/75A GB 3302675 A GB3302675 A GB 3302675A GB 1512667 A GB1512667 A GB 1512667A
Authority
GB
United Kingdom
Prior art keywords
charging
capacitor
thyristor
detector
light
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
GB33026/75A
Other languages
English (en)
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.)
Erwin Sick GmbH Optik Elektronik
Original Assignee
Erwin Sick GmbH Optik Elektronik
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 Erwin Sick GmbH Optik Elektronik filed Critical Erwin Sick GmbH Optik Elektronik
Publication of GB1512667A publication Critical patent/GB1512667A/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
    • G08B13/184—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 using radiation reflectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V8/00—Prospecting or detecting by optical means
    • G01V8/10—Detecting, e.g. by using light barriers
    • G01V8/12—Detecting, e.g. by using light barriers using one transmitter and one receiver
    • G01V8/14—Detecting, e.g. by using light barriers using one transmitter and one receiver using reflectors
    • G—PHYSICS
    • G08—SIGNALLING
    • G08G—TRAFFIC CONTROL SYSTEMS
    • G08G1/00—Traffic control systems for road vehicles
    • G08G1/01—Detecting movement of traffic to be counted or controlled
    • G08G1/04—Detecting movement of traffic to be counted or controlled using optical or ultrasonic detectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geophysics (AREA)
  • Electronic Switches (AREA)
  • Rectifiers (AREA)
  • Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
GB33026/75A 1974-10-24 1975-08-07 Light barrier Expired GB1512667A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2450648A DE2450648B2 (de) 1974-10-24 1974-10-24 Lichtschranke

Publications (1)

Publication Number Publication Date
GB1512667A true GB1512667A (en) 1978-06-01

Family

ID=5929116

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33026/75A Expired GB1512667A (en) 1974-10-24 1975-08-07 Light barrier

Country Status (5)

Country Link
US (1) US4012635A (enExample)
DE (1) DE2450648B2 (enExample)
FR (1) FR2288970A1 (enExample)
GB (1) GB1512667A (enExample)
IT (1) IT1040288B (enExample)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2550653C3 (de) * 1975-11-11 1978-12-21 Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch Drehstrahl-Lichtvorhang
DE2623136C2 (de) * 1976-05-22 1985-08-22 Leuze electronic GmbH + Co, 7311 Owen Melde- und/oder Alarmvorrichtung
DE2629476B2 (de) * 1976-06-30 1979-02-15 Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch Sich selbst auf Verschmutzungen überwachende Lichtschrankenanordnung
DE2910064A1 (de) * 1979-03-14 1980-09-18 Sick Optik Elektronik Erwin Lichtschrankengehaeuse
DE2927630A1 (de) * 1979-07-09 1981-02-12 Licentia Gmbh Lichtschranke
CH639789A5 (de) * 1979-08-15 1983-11-30 Benno Perren Selbstueberwachende warnanlage.
DE3113547C2 (de) * 1981-04-03 1983-08-18 Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch Direkt an ein Wechselspannungsnetz anschließbare Wechsellichtschranke
US4502823A (en) * 1981-12-21 1985-03-05 Sperry Corporation Broken drill bit detector
DE3230903C2 (de) * 1982-08-19 1985-07-18 Erwin Sick Gmbh Optik-Elektronik, 7808 Waldkirch Schaltende Lichtschranke
FR2564209B1 (fr) * 1984-05-10 1987-01-30 Commissariat Energie Atomique Systeme de detection optique a distance
DE3620012A1 (de) * 1986-06-13 1987-12-17 Layh Hans Dieter Lichtschrankenanordnung
JP2688361B2 (ja) * 1988-08-02 1997-12-10 正己 山川 光電センサ
US5187361A (en) * 1989-04-25 1993-02-16 Copal Company Limited Object detection apparatus of the photoelectric reflection type with sampled data
DE69316883T2 (de) * 1993-06-11 1998-09-24 Kleinau & Billmeier Ltd Überwachungseinrichtung
US6064559A (en) * 1998-02-09 2000-05-16 Eni Technologies Inc. Fiber optic position sensor for tuning capacitor
DE10114784A1 (de) * 2001-03-26 2002-10-10 Sick Ag Vorrichtung zur Überwachung eines Schutzfeldes
DE102012111433B4 (de) * 2012-11-26 2017-12-14 Pilz Auslandsbeteiligungen Gmbh Optoelektrische Schutzeinrichtung zum Absichern einer Gefahrenstelle

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3605082A (en) * 1969-04-16 1971-09-14 Laser Systems Corp Intruder detection system
US3711846A (en) * 1971-02-08 1973-01-16 Holobeam Segment locating intrusion alarm system
US3723737A (en) * 1971-05-18 1973-03-27 North American Rockwell Infrared detection and control device
US3859647A (en) * 1971-08-25 1975-01-07 Infrared Ind Inc Photoelectric intrusion sensing device employing synchronous demodulation
SE364403B (enExample) * 1972-07-03 1974-02-18 Bofors Ab
US3914753A (en) * 1973-12-17 1975-10-21 Franciscan Enterprises Inc Intruder alarm system

Also Published As

Publication number Publication date
FR2288970B1 (enExample) 1980-03-07
IT1040288B (it) 1979-12-20
DE2450648A1 (de) 1976-04-29
DE2450648B2 (de) 1979-08-23
US4012635A (en) 1977-03-15
FR2288970A1 (fr) 1976-05-21

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee