GB1461441A - Condition responsive apparatus - Google Patents

Condition responsive apparatus

Info

Publication number
GB1461441A
GB1461441A GB409974A GB409974A GB1461441A GB 1461441 A GB1461441 A GB 1461441A GB 409974 A GB409974 A GB 409974A GB 409974 A GB409974 A GB 409974A GB 1461441 A GB1461441 A GB 1461441A
Authority
GB
United Kingdom
Prior art keywords
test circuit
machine
signal
region
flops
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
GB409974A
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.)
Xenex Corp
Original Assignee
Xenex Corp
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 Xenex Corp filed Critical Xenex Corp
Publication of GB1461441A publication Critical patent/GB1461441A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
    • G01V3/088—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices operating with electric fields
    • 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
    • F16P3/148—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 capacitive technology

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Safety Devices In Control Systems (AREA)
  • Tests Of Electronic Circuits (AREA)
  • Train Traffic Observation, Control, And Security (AREA)

Abstract

1461441 Protective devices XENEX CORP 29 Jan 1974 [29 Jan 1973] 04099/74 Heading H2K A test circuit checks the correct functioning of a presence detecting system, which system comprises a sensor 12 which detects a change in capacitance in a region over a machine worktable 10 when something is introduced or withdrawn from the region, any such change unbalancing the oscillator fed capacitance bridge formed by the region and capacitors 22, 16 and 18, and causing a signal to pass from the differential amplifier 32 via a demodulator 34, logic circuitry 46 and flip-flops 56, 58 and 60 to drivers 64, 66 which energize relays 68 and 70 to switch off the machine, the test circuit comprising a timer 48 which cyclically applies a signal to the differential amplifier 32 simulating bridge unbalance and to the logic circuitry 46 and flip-flops 52, 54 to condition them to respond to this simulated signal, the test circuit being so arranged that if the system does not respond correctly the machine is switched off and an indicator indicates a fault in the system.
GB409974A 1973-01-29 1974-01-29 Condition responsive apparatus Expired GB1461441A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US327384A US3886413A (en) 1973-01-29 1973-01-29 Presence sensing and self-checking control system

Publications (1)

Publication Number Publication Date
GB1461441A true GB1461441A (en) 1977-01-13

Family

ID=23276330

Family Applications (1)

Application Number Title Priority Date Filing Date
GB409974A Expired GB1461441A (en) 1973-01-29 1974-01-29 Condition responsive apparatus

Country Status (6)

Country Link
US (1) US3886413A (en)
CA (1) CA1005873A (en)
CH (1) CH588127A5 (en)
DE (1) DE2403058A1 (en)
FR (1) FR2215629B1 (en)
GB (1) GB1461441A (en)

Families Citing this family (44)

* Cited by examiner, † Cited by third party
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FR2283494A2 (en) * 1974-09-02 1976-03-26 Cometa Photoelectric scanning of control zone - by comparing count signals with scanning switch states to decide if scanning continues
US3995200A (en) * 1975-06-23 1976-11-30 Stolarczyk Larry G Ground monitor and circuit breaker actuating device
US4103293A (en) * 1975-11-21 1978-07-25 Tri-Century Industries, Inc. Intrusion alarm apparatus
US4309696A (en) * 1978-06-26 1982-01-05 Kabushiki Kaisha Komatsu Seisakusho Trouble detecting unit in an optical security device
ES495038A0 (en) * 1979-09-10 1981-12-16 Gordon Ambler Kenneth A METHOD AND A DETECTION DEVICE FOR OPAQUE MEMBERS WHICH ARE FOUND WITHIN A DETECTION SPACE.
FR2492127A1 (en) * 1980-09-26 1982-04-16 Cometa Sa ELECTRONIC SELF-CONTROL SYSTEM
US4484119A (en) * 1983-06-28 1984-11-20 At&T Technologies, Inc. Fail-safe machine control system
DE3508298C1 (en) * 1985-03-08 1986-10-09 Bergwerksverband Gmbh, 4300 Essen Device for monitoring machines
US4812674A (en) * 1985-05-20 1989-03-14 Square D Company Safety gate limit switch using Hall effect transducer
DE3619723A1 (en) * 1986-06-12 1987-12-17 Kloeckner Moeller Elektrizit Additional controller, having contacts, for safety circuits
US4777473A (en) * 1986-08-22 1988-10-11 Fire Burglary Instruments, Inc. Alarm system incorporating dynamic range testing
US5149921A (en) * 1991-07-10 1992-09-22 Innovation Industries, Inc. Self correcting infrared intrusion detection system
US5218196A (en) * 1991-09-05 1993-06-08 Frost Controls, Inc. Light curtain system with system and watchdog microcontrollers
FR2703756B1 (en) * 1993-04-07 1995-12-29 Lebail Hubert Yvon Safety amplifier box for fiber optic sensors.
US5850342A (en) * 1996-09-24 1998-12-15 Nakamura; Kaoru Machine tool control system
JP3972064B2 (en) * 1999-04-02 2007-09-05 独立行政法人労働安全衛生総合研究所 Sensor device and safety device
US7231856B2 (en) 2001-06-13 2007-06-19 Sd3, Llc Apparatus and method for detecting dangerous conditions in power equipment
US7712403B2 (en) 2001-07-03 2010-05-11 Sd3, Llc Actuators for use in fast-acting safety systems
US7827890B2 (en) 2004-01-29 2010-11-09 Sd3, Llc Table saws with safety systems and systems to mount and index attachments
US20030056853A1 (en) 2001-09-21 2003-03-27 Gass Stephen F. Router with improved safety system
US8459157B2 (en) 2003-12-31 2013-06-11 Sd3, Llc Brake cartridges and mounting systems for brake cartridges
US6857345B2 (en) 2000-08-14 2005-02-22 Sd3, Llc Brake positioning system
US8061245B2 (en) 2000-09-29 2011-11-22 Sd3, Llc Safety methods for use in power equipment
US6994004B2 (en) 2000-09-29 2006-02-07 Sd3, Llc Table saw with improved safety system
US9724840B2 (en) 1999-10-01 2017-08-08 Sd3, Llc Safety systems for power equipment
US7536238B2 (en) 2003-12-31 2009-05-19 Sd3, Llc Detection systems for power equipment
US7836804B2 (en) 2003-08-20 2010-11-23 Sd3, Llc Woodworking machines with overmolded arbors
US7024975B2 (en) 2000-08-14 2006-04-11 Sd3, Llc Brake mechanism for power equipment
US7707920B2 (en) 2003-12-31 2010-05-04 Sd3, Llc Table saws with safety systems
US9927796B2 (en) 2001-05-17 2018-03-27 Sawstop Holding Llc Band saw with improved safety system
US7600455B2 (en) * 2000-08-14 2009-10-13 Sd3, Llc Logic control for fast-acting safety system
US7225712B2 (en) 2000-08-14 2007-06-05 Sd3, Llc Motion detecting system for use in a safety system for power equipment
US7210383B2 (en) 2000-08-14 2007-05-01 Sd3, Llc Detection system for power equipment
US8065943B2 (en) 2000-09-18 2011-11-29 Sd3, Llc Translation stop for use in power equipment
US7000514B2 (en) 2001-07-27 2006-02-21 Sd3, Llc Safety systems for band saws
US20020017179A1 (en) 2000-08-14 2002-02-14 Gass Stephen F. Miter saw with improved safety system
US7098800B2 (en) 2003-03-05 2006-08-29 Sd3, Llc Retraction system and motor position for use with safety systems for power equipment
US7077039B2 (en) 2001-11-13 2006-07-18 Sd3, Llc Detection system for power equipment
US9580245B2 (en) * 2014-06-10 2017-02-28 Amazon Technologies, Inc. Item-detecting overhead sensor for inventory system
US9824328B2 (en) 2014-06-10 2017-11-21 Amazon Technologies, Inc. Arm-detecting overhead sensor for inventory system
JP6712663B1 (en) * 2019-06-19 2020-06-24 Dmg森精機株式会社 Machine tool and self-diagnosis method for machine tool
EP4040034B1 (en) * 2021-02-04 2023-06-07 Sick Ag Safety device and safety method for monitoring a machine
CN113112834A (en) * 2021-04-14 2021-07-13 广东古田智能科技有限公司 Traffic light system and lamp bead fault detection method thereof
CN116880491A (en) * 2023-07-21 2023-10-13 弥费科技(上海)股份有限公司 Anti-collision control device, system and method for AMHS (automated mechanical transmission) carrying trolley

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3543260A (en) * 1968-07-24 1970-11-24 Honeywell Inc Self checking interuder and fire detector units and system
DE1952349B2 (en) * 1969-10-17 1973-06-20 ARRANGEMENT FOR TESTING A REDUNDANT CONTROL SYSTEM
DE2058754B2 (en) * 1970-11-30 1973-09-06 Dr. Hans Boekels & Co, 5100 Aachen CIRCUIT ARRANGEMENT FOR A METAL DETECTOR USED ON A MOVING MATERIAL
US3737744A (en) * 1971-12-30 1973-06-05 Bader Dev Corp Body detecting industrial safety system

Also Published As

Publication number Publication date
US3886413A (en) 1975-05-27
CH588127A5 (en) 1977-05-31
DE2403058A1 (en) 1974-08-01
CA1005873A (en) 1977-02-22
FR2215629B1 (en) 1980-08-29
FR2215629A1 (en) 1974-08-23

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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