GB913718A - A safety device for a machine tool - Google Patents

A safety device for a machine tool

Info

Publication number
GB913718A
GB913718A GB13341/58A GB1334158A GB913718A GB 913718 A GB913718 A GB 913718A GB 13341/58 A GB13341/58 A GB 13341/58A GB 1334158 A GB1334158 A GB 1334158A GB 913718 A GB913718 A GB 913718A
Authority
GB
United Kingdom
Prior art keywords
machine tool
oscillator
safety device
approached
april
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
GB13341/58A
Inventor
Anthony John Boseley
Thomas Symington Mcleod
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.)
Plessey Co Ltd
Original Assignee
Plessey Co 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 Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB13341/58A priority Critical patent/GB913718A/en
Publication of GB913718A publication Critical patent/GB913718A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
    • H03K17/945—Proximity switches
    • H03K17/955—Proximity switches using a capacitive detector
    • 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)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Auxiliary Devices For Machine Tools (AREA)

Abstract

913,718. Safety devices for machinery. PLESSEY CO. Ltd. April 27, 1959 [April 28, 1958], No. 13341/58. Class 80 (4). [Also in Group XXXVI] An electric control circuit for a machine tool such as a press comprises an electronic oscillator and a sensitive element attached to the machinetool and connected to a point in the circuit such that when the element is approached by the operator's hands, the increase in capacitance Stops the oscillator and switches the machine tool off. The space between the dies 2, 3 may be approached only through a ring 11; the increase in capacitance between the ring and earth when the operator's hands are inserted stops the transistor oscillator 11A, thereby causing the control circuit 9 to switch off the motor 8.
GB13341/58A 1958-04-28 1958-04-28 A safety device for a machine tool Expired GB913718A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB13341/58A GB913718A (en) 1958-04-28 1958-04-28 A safety device for a machine tool

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB13341/58A GB913718A (en) 1958-04-28 1958-04-28 A safety device for a machine tool

Publications (1)

Publication Number Publication Date
GB913718A true GB913718A (en) 1962-12-28

Family

ID=10021193

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13341/58A Expired GB913718A (en) 1958-04-28 1958-04-28 A safety device for a machine tool

Country Status (1)

Country Link
GB (1) GB913718A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1203438B (en) * 1963-07-12 1965-10-21 Arie Adrianus De Koning Safety device on hydraulically operated lifting platforms
JPS4843314B1 (en) * 1969-04-01 1973-12-18
FR2443190A1 (en) * 1978-12-08 1980-07-04 Skf Ind Trading & Dev AGRICULTURAL MACHINE PROVIDED WITH A SECURITY DEVICE
US4768926A (en) * 1987-07-27 1988-09-06 Gilbert Jr Billy D Remote control fan
GB2237348A (en) * 1989-10-26 1991-05-01 Townsend Engineering Co Safety device for machinery
WO2006138008A2 (en) * 2005-05-16 2006-12-28 Waveon Technologies, Inc. Proximity sensor for controlling light switches and other devices
EP3926229A1 (en) * 2020-06-17 2021-12-22 Pilz GmbH & Co. KG Safety sensor and method for securing a machine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1203438B (en) * 1963-07-12 1965-10-21 Arie Adrianus De Koning Safety device on hydraulically operated lifting platforms
JPS4843314B1 (en) * 1969-04-01 1973-12-18
FR2443190A1 (en) * 1978-12-08 1980-07-04 Skf Ind Trading & Dev AGRICULTURAL MACHINE PROVIDED WITH A SECURITY DEVICE
US4768926A (en) * 1987-07-27 1988-09-06 Gilbert Jr Billy D Remote control fan
GB2237348A (en) * 1989-10-26 1991-05-01 Townsend Engineering Co Safety device for machinery
GB2237348B (en) * 1989-10-26 1993-11-03 Townsend Engineering Co A meat skinning maching and method of stopping such
WO2006138008A2 (en) * 2005-05-16 2006-12-28 Waveon Technologies, Inc. Proximity sensor for controlling light switches and other devices
WO2006138008A3 (en) * 2006-05-16 2007-06-07 Waveon Technologies Inc Proximity sensor for controlling light switches and other devices
EP3926229A1 (en) * 2020-06-17 2021-12-22 Pilz GmbH & Co. KG Safety sensor and method for securing a machine

Similar Documents

Publication Publication Date Title
GB913718A (en) A safety device for a machine tool
GB968559A (en) Improvements in power transmission and speed reduction apparatus
GB713383A (en) Improvements in electric preselecting switch devices, particularly for machine tools
ES279124A1 (en) Voltage change-over switch for electrical apparatus
FR2392437A1 (en) Safety circuit for machine tool - permits operation if operators body resistance is between fixed limits
CA564582A (en) Circuit arrangement for controlling an electric load fed via a transistor
AU241812B2 (en) Machine tool device
AU249809B2 (en) A warning device foran electrical circuit
CA625831A (en) Reclamation device for gas-type circuit interrupters
AU5946960A (en) Machine tool device
CA596548A (en) Control devices for a machine
CA601888A (en) Switch for choosing design for sewing machines
AU254661A (en) A warning device foran electrical circuit
AU245734B2 (en) Improvements in or relating to current supply devices ofthe kind including a transistor circuit
AT256232B (en) Contact device, usable in particular as a switch auxiliary contact
CA567298A (en) Electronic switch incorporated in a deflection circuit
FR1282411A (en) Machine tool control device
JPS52134979A (en) Elastic body fitting in vibration preventing device
CA603069A (en) Device for actuating a shaft with an intermittent rotary motion in a sewing machine
CA604665A (en) Power steering device
GR17518B (en) REGULATOR AND AUTOMATIC SWITCH BY ELECTRICAL illuminant pointer speed VEHICLES AUTOMATIC THROUGH ELECTRONIC illuminant, SPEED INDEX (ROBOT) and special machines CONTROL OPERATION pointer.
AU244331B2 (en) Patterning device for knitting machine
CA610694A (en) Operator utilizing a hydraulic motor
CA599079A (en) Motor operated circuit breaker
AU6649260A (en) Improvements in or relating to current supply devices ofthe kind including a transistor circuit