GB1342144A - Photoelectric guard system for machines - Google Patents

Photoelectric guard system for machines

Info

Publication number
GB1342144A
GB1342144A GB5777671A GB5777671A GB1342144A GB 1342144 A GB1342144 A GB 1342144A GB 5777671 A GB5777671 A GB 5777671A GB 5777671 A GB5777671 A GB 5777671A GB 1342144 A GB1342144 A GB 1342144A
Authority
GB
United Kingdom
Prior art keywords
guard system
machine
comparator
light
photo
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
GB5777671A
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.)
Cincinnati Inc
Original Assignee
Cincinnati Inc
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 Cincinnati Inc filed Critical Cincinnati Inc
Publication of GB1342144A publication Critical patent/GB1342144A/en
Expired 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)
  • Presses And Accessory Devices Thereof (AREA)
  • Control Of Presses (AREA)

Abstract

1342144 Photo-electric-machine guard system CINCINNATI Inc 13 Dee 1971 [12 May 1971] 57776/71 Heading F2J [Also in Division G1] In a photo-electric guard system using the interruption of a light beam to stop a machine, the light source is modulated by modulating its current supply and the signal arising from the detection of the modulated light is compared with the modulation of the source current to effect shut down. Alternate lights of a series 14a-14g, Fig. 1, forming a protective light curtain are energized in antiphase by a square wave generator, and after shaping, the pulses from detectors 20a-20g positioned to recieve the respective modulated light beams, are applied to a comparator 26 to which the modulation from the supply current is also applied. The comparator comprises a NAND gate and produces an output pulse for each cycle of each phase if all signals-are present. The output pulses from the comparator are measured for separation and duration, for stopping the machine, and guard system muting arrangements may be incorporated to be operative for example during the up movement of a ram, together with a suitably positioned GUARD-OFF indicator. The switchoff may be actuated by overrun apparatus. False operation by metal deformity for example at the bottom of the downward stroke of a press, may also be avoided by synchronized muting. The arrangement is made fail-safe and includes limit-switch monitoring.
GB5777671A 1971-05-12 1971-12-13 Photoelectric guard system for machines Expired GB1342144A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US14262071A 1971-05-12 1971-05-12

Publications (1)

Publication Number Publication Date
GB1342144A true GB1342144A (en) 1973-12-25

Family

ID=22500598

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5777671A Expired GB1342144A (en) 1971-05-12 1971-12-13 Photoelectric guard system for machines

Country Status (2)

Country Link
US (1) US3704396A (en)
GB (1) GB1342144A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2827863A1 (en) * 1977-07-04 1979-04-19 Komatsu Mfg Co Ltd Optical safety system for press - has sub-system to periodically produce artificial fault condition by interrupting optical couplings using relay to actuate counter
WO1981000750A1 (en) * 1979-09-10 1981-03-19 Ambler K Improvements relating to safety mechanisms for industrial machinery
US4446602A (en) * 1980-08-29 1984-05-08 Trutzschler Gmbh & Co. Kg Machine operator protection system
GB2206203A (en) * 1987-06-25 1988-12-29 Amp Inc Infrared touch input device having ambient compensation
US5038488A (en) * 1988-10-04 1991-08-13 Carl-Zeiss-Stiftung Protective arrangement for a longitudinally extendible machine component

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US3816745A (en) * 1972-11-20 1974-06-11 Innovation Ind Inc Optically-coupled sensing and control system
US3805061A (en) * 1973-04-23 1974-04-16 Tyco Laboratories Inc Object detecting apparatus
US3852592A (en) * 1973-06-07 1974-12-03 Stanley Works Automatic door operator
US3842260A (en) * 1973-09-21 1974-10-15 Hormel & Co G Safety device for bacon press
DE2451100C2 (en) * 1973-10-29 1983-01-13 Xenex Corp., Woburn, Mass. Self-monitoring device for a safety device for controlling a machine as a function of the penetration of an object into a protection zone
US3912924A (en) * 1973-11-07 1975-10-14 Link Electric & Safety Control Machine safety control
US4063085A (en) * 1975-11-03 1977-12-13 Cometa S. A. Method of and apparatus for electronic scanning
SE428250B (en) * 1979-05-31 1983-06-13 Bert Jonsson PHOTOELECTRIC DEVICE FOR SENSING FORM
US4280164A (en) * 1979-07-24 1981-07-21 Ims Ltd. Fail-safe relay system
US4520262A (en) * 1979-09-10 1985-05-28 Kenneth Ambler Photoelectric safety screen with stray source detection
DE2939833C2 (en) * 1979-10-01 1982-06-09 Universal-Maschinenfabrik Dr. Rudolf Schieber Gmbh & Co Kg, 7081 Westhausen Protective device for the movement space of the slide of a flat knitting machine
US4723192A (en) * 1985-07-05 1988-02-02 Lee Jiunn K Automatic electricity control monitoring exit/entry device
KR900005225B1 (en) * 1985-07-09 1990-07-21 알프스덴기 가부시기 가이샤 Optical coordinating input apparatus
USRE37777E1 (en) * 1986-10-08 2002-07-02 Jeffrey G. Herman Switch apparatus requiring the hand of the operator to activate the switch by breaking a light beam
US4939358A (en) * 1986-10-08 1990-07-03 Jeffries, Inc. Switch apparatus including a pair of beam-type switches
US5164714A (en) * 1988-06-20 1992-11-17 Amp Incorporated Modulated touch entry system and method with synchronous detection
US5015840B1 (en) * 1990-01-09 1995-04-11 Scient Technologies Inc Self-checking light curtain system and method of operation.
US5077467A (en) * 1990-09-12 1991-12-31 Triad Controls, Inc. Photoelectric switch and relay system with disabling fail-safe monitoring circuitry
US5367158A (en) * 1991-10-25 1994-11-22 Break-A-Beam, Inc. Photoelectric switch for use with a machine control circuit
US5302942A (en) * 1992-11-19 1994-04-12 Scientific Technologies Incorporated Light curtain system with individual beam indicators and method of operation
US5414634A (en) * 1993-04-19 1995-05-09 Stark Manufacturing, Inc. System and method for controlling item selection, sequence and completeness
US5805451A (en) * 1996-04-12 1998-09-08 Stark Manufacturing, Inc. Item selection and item loading error proofing apparatus
US6384402B1 (en) 1998-04-29 2002-05-07 Automated Merchandising Systems Optical vend-sensing system for control of vending machine
AUPQ022199A0 (en) 1999-05-05 1999-06-03 Lazer Safe Pty Ltd Industrial press safety system
US6354716B1 (en) 2000-08-04 2002-03-12 Honeywell International Inc Light curtain device
US6732014B2 (en) * 2001-02-27 2004-05-04 Crane Co. System for accomplishing product detection
DE10123562A1 (en) * 2001-05-15 2002-11-21 Fiessler Elektronik Ohg Protection device for machines, such as press brakes, cutting machines, punching machines or the like
AU2002349919B2 (en) 2001-10-24 2008-11-13 Crane Co. Apparatus and methodology of detecting fulfillment of customer vend request
JP2003218679A (en) 2002-01-25 2003-07-31 Keyence Corp Multi-optical-axis photoelectric type safety device
AUPS140902A0 (en) * 2002-03-27 2002-05-09 Lazer Safe Pty Ltd Multiple laser safety system
DE10216123B4 (en) * 2002-04-12 2008-04-10 Sick Ag monitoring device
EP2319473A3 (en) 2002-04-19 2014-04-30 Hill-Rom Services, Inc. Hospital bed obstacle detection device and method
JP4212970B2 (en) * 2003-06-30 2009-01-21 株式会社キーエンス Safety relay system
US7329854B2 (en) * 2005-09-26 2008-02-12 Banner Engineering Corporation System and method of connecting multiple safety light curtains
US7918374B2 (en) * 2007-01-29 2011-04-05 Halex/Scott Fetzer Company Portable fastener driving device
DE102007024210A1 (en) * 2007-05-15 2008-11-27 Pilz Gmbh & Co. Kg Optoelectronic sensor to protect a hazardous area
DE202009004327U1 (en) * 2008-10-25 2010-04-08 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Hallstadt sensor device
CN102921833A (en) * 2012-11-23 2013-02-13 昆山腾宇鑫金属制品有限公司 Protection device for automatic pipe contracting machine
EP2985636B1 (en) * 2014-08-11 2018-07-25 Leuze electronic GmbH + Co KG Method for aligning a sensor device
US11406548B2 (en) 2018-09-27 2022-08-09 Hill-Rom Services, Inc. Obstacle detection IR beam filter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2631273A (en) * 1948-06-29 1953-03-10 Alertronic Protective Corp Of Apparatus for photoelectric detection
US2912683A (en) * 1956-12-31 1959-11-10 Kidde & Co Walter Apparatus for photoelectric intruder detection
US3181035A (en) * 1962-01-12 1965-04-27 American Brake Shoe Co Electronic control circuit
US3370284A (en) * 1965-01-21 1968-02-20 Samuel M. Bagno Optical space alarm
US3543260A (en) * 1968-07-24 1970-11-24 Honeywell Inc Self checking interuder and fire detector units and system
US3612884A (en) * 1969-02-28 1971-10-12 Eastern Co Fail-safe photoelectric control system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2827863A1 (en) * 1977-07-04 1979-04-19 Komatsu Mfg Co Ltd Optical safety system for press - has sub-system to periodically produce artificial fault condition by interrupting optical couplings using relay to actuate counter
WO1981000750A1 (en) * 1979-09-10 1981-03-19 Ambler K Improvements relating to safety mechanisms for industrial machinery
US4446602A (en) * 1980-08-29 1984-05-08 Trutzschler Gmbh & Co. Kg Machine operator protection system
GB2206203A (en) * 1987-06-25 1988-12-29 Amp Inc Infrared touch input device having ambient compensation
GB2206203B (en) * 1987-06-25 1991-04-03 Amp Inc Infrared touch input device having ambient compensation
US5038488A (en) * 1988-10-04 1991-08-13 Carl-Zeiss-Stiftung Protective arrangement for a longitudinally extendible machine component
US5111591A (en) * 1988-10-04 1992-05-12 Carl-Zeiss-Stiftung Protective arrangement for a longitudinally extendible machine component
GB2255810A (en) * 1988-10-04 1992-11-18 Zeiss Stiftung A protective arrangement for a longitudinally-extendible machine component
GB2255810B (en) * 1988-10-04 1993-02-03 Zeiss Stiftung Protective arrangement for longitudinally extended machine components
GB2223557B (en) * 1988-10-04 1993-02-03 Zeiss Stiftung Protective arrangement for longitudinally extended machine components

Also Published As

Publication number Publication date
US3704396A (en) 1972-11-28

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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