FR2277387A1 - Optical safety apparatus - pulsed beam acts on photo-electric device giving controlled and amplified output - Google Patents

Optical safety apparatus - pulsed beam acts on photo-electric device giving controlled and amplified output

Info

Publication number
FR2277387A1
FR2277387A1 FR7520956A FR7520956A FR2277387A1 FR 2277387 A1 FR2277387 A1 FR 2277387A1 FR 7520956 A FR7520956 A FR 7520956A FR 7520956 A FR7520956 A FR 7520956A FR 2277387 A1 FR2277387 A1 FR 2277387A1
Authority
FR
France
Prior art keywords
photo
electric device
amplified output
safety apparatus
pulsed beam
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.)
Withdrawn
Application number
FR7520956A
Other languages
French (fr)
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.)
VEGA CANTLEY INSTR CY Ltd
Original Assignee
VEGA CANTLEY INSTR CY Ltd
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 VEGA CANTLEY INSTR CY Ltd filed Critical VEGA CANTLEY INSTR CY Ltd
Publication of FR2277387A1 publication Critical patent/FR2277387A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • F16P3/12—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine
    • F16P3/14—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact
    • F16P3/144—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body with means, e.g. feelers, which in case of the presence of a body part of a person in or near the danger zone influence the control or operation of the machine the means being photocells or other devices sensitive without mechanical contact using light grids

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Optical Communication System (AREA)
  • Particle Accelerators (AREA)
  • Electronic Switches (AREA)

Abstract

A protective system on a machine has a beam producing apparatus and a device to give an output signal in response to it. The impulse generator (0) works from the light emitter (D1) which lights a photo-electric device (D2) with impulsed beams. There is a discriminator (G1) at the photo-electric device output so that a signal is only produced when the photo-electric device is illuminated. There is also time delay (H) connected between the impulse generator and the discriminator. The impulse generator is a unijunction device connected by controlled rectifier (S) controlling the light emitter. There are monostables assisting in time delay and oscillating functions.
FR7520956A 1974-07-04 1975-07-03 Optical safety apparatus - pulsed beam acts on photo-electric device giving controlled and amplified output Withdrawn FR2277387A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2971674 1974-07-04

Publications (1)

Publication Number Publication Date
FR2277387A1 true FR2277387A1 (en) 1976-01-30

Family

ID=10295980

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7520956A Withdrawn FR2277387A1 (en) 1974-07-04 1975-07-03 Optical safety apparatus - pulsed beam acts on photo-electric device giving controlled and amplified output

Country Status (10)

Country Link
JP (1) JPS5127475A (en)
AU (1) AU8263575A (en)
BE (1) BE830942A (en)
DE (1) DE2530000A1 (en)
DK (1) DK290275A (en)
FR (1) FR2277387A1 (en)
LU (1) LU72899A1 (en)
NL (1) NL7507974A (en)
SE (1) SE7507246L (en)
ZA (1) ZA754039B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0062288A1 (en) * 1981-04-03 1982-10-13 Erwin Sick GmbH Optik-Elektronik Pulsed light barrier directly connected to an AC power supply

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2753571C2 (en) * 1977-12-01 1982-07-01 Schneiderwerk Lübeck, Graphische Maschinen- und Apparatebau GmbH, 2400 Lübeck Protective device for securing and monitoring dangerous work areas on machines
JPS55100127A (en) * 1979-01-24 1980-07-30 Unitika Ltd Manufacture of polyamide film of improved slip property
JPS57136600U (en) * 1981-02-17 1982-08-26
JPS59140994A (en) * 1983-01-31 1984-08-13 株式会社小松製作所 Ray type safety device
US4533509A (en) * 1983-04-28 1985-08-06 Mobil Oil Corporation Low coefficient of friction film structure and method of forming the same
DE3611408A1 (en) * 1986-04-04 1987-10-15 Kaltenbach & Voigt CIRCUIT ARRANGEMENT FOR DETERMINING THE EXISTENCE OR. THE EXTRACTION OF OBJECTS, IN PARTICULAR OF DENTAL TREATMENT INSTRUMENTS, IN OR FROM RECORDINGS
DE3700617A1 (en) * 1987-01-10 1988-07-21 Dirk Leimbach Signal barrier safety device
US5272383A (en) * 1989-04-21 1993-12-21 Shinkoh Electric Co., Ltd. Method and apparatus for preventing erroneous operation in non-contact push-button switch
AUPN744696A0 (en) * 1996-01-05 1996-02-01 Appleyard, Thomas John Safety apparatus and protection method for machines
DE102012111433B4 (en) * 2012-11-26 2017-12-14 Pilz Auslandsbeteiligungen Gmbh Opto-electric protective device for securing a danger spot

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0062288A1 (en) * 1981-04-03 1982-10-13 Erwin Sick GmbH Optik-Elektronik Pulsed light barrier directly connected to an AC power supply

Also Published As

Publication number Publication date
ZA754039B (en) 1976-06-30
DK290275A (en) 1976-01-05
DE2530000A1 (en) 1976-01-22
BE830942A (en) 1975-11-03
NL7507974A (en) 1976-01-06
SE7507246L (en) 1976-01-05
LU72899A1 (en) 1975-12-09
AU8263575A (en) 1977-01-06
JPS5127475A (en) 1976-03-08

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Legal Events

Date Code Title Description
ST Notification of lapse