FR2346889A2 - Twin push button safety switch - has interlocked diodes and relay contacts for power press - Google Patents

Twin push button safety switch - has interlocked diodes and relay contacts for power press

Info

Publication number
FR2346889A2
FR2346889A2 FR7609116A FR7609116A FR2346889A2 FR 2346889 A2 FR2346889 A2 FR 2346889A2 FR 7609116 A FR7609116 A FR 7609116A FR 7609116 A FR7609116 A FR 7609116A FR 2346889 A2 FR2346889 A2 FR 2346889A2
Authority
FR
France
Prior art keywords
diodes
safety switch
interlocked
push button
relay contacts
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.)
Granted
Application number
FR7609116A
Other languages
French (fr)
Other versions
FR2346889B2 (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.)
Renault SAS
Original Assignee
Renault SAS
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 Renault SAS filed Critical Renault SAS
Priority to FR7609116A priority Critical patent/FR2346889A2/en
Priority to DE19772713872 priority patent/DE2713872C3/en
Publication of FR2346889A2 publication Critical patent/FR2346889A2/en
Application granted granted Critical
Publication of FR2346889B2 publication Critical patent/FR2346889B2/fr
Granted 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
    • F16P3/18—Control arrangements requiring the use of both hands
    • F16P3/20—Control arrangements requiring the use of both hands for electric control systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H47/00—Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
    • H01H47/002—Monitoring or fail-safe circuits
    • H01H47/004—Monitoring or fail-safe circuits using plural redundant serial connected relay operated contacts in controlled circuit
    • H01H47/005—Safety control circuits therefor, e.g. chain of relays mutually monitoring each other
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/005—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for remote controlled apparatus; for lines connecting such apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Relay Circuits (AREA)
  • Keying Circuit Devices (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Control Of Presses (AREA)

Abstract

A safety switch for operating machines such as a power press includes two push buttons which have to be pressed simultaneously in order to start a working cycle of the press. The two push buttons energise two relays which in turn close the circuit to the A6 supply. A third push button is provided with which the machine can be stopped. Diodes and interlocked relay contacts, included in the control circuit, ensure that only the correct starting procedure will operate the press. A short circuit anywhere in the equipment will also cause the power supply to be cut-off.
FR7609116A 1976-03-30 1976-03-30 Twin push button safety switch - has interlocked diodes and relay contacts for power press Granted FR2346889A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7609116A FR2346889A2 (en) 1976-03-30 1976-03-30 Twin push button safety switch - has interlocked diodes and relay contacts for power press
DE19772713872 DE2713872C3 (en) 1976-03-30 1977-03-29 AC safety circuit for the remote control of machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7609116A FR2346889A2 (en) 1976-03-30 1976-03-30 Twin push button safety switch - has interlocked diodes and relay contacts for power press

Publications (2)

Publication Number Publication Date
FR2346889A2 true FR2346889A2 (en) 1977-10-28
FR2346889B2 FR2346889B2 (en) 1980-06-13

Family

ID=9171104

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7609116A Granted FR2346889A2 (en) 1976-03-30 1976-03-30 Twin push button safety switch - has interlocked diodes and relay contacts for power press

Country Status (2)

Country Link
DE (1) DE2713872C3 (en)
FR (1) FR2346889A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2586835A1 (en) * 1985-09-04 1987-03-06 Electroli Sa SELECTIVE CONTROL AND SAFETY DEVICE FOR COMBINED MACHINE
EP0874437A2 (en) * 1997-04-11 1998-10-28 Schneider Electric Sa Circuit for starting a machine or the like and method for controlling start-up of a machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19930994B4 (en) * 1999-07-05 2006-03-02 Leuze Lumiflex Gmbh + Co. Kg Circuit arrangement for monitoring relays in safety circuits with at least 3 relays

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2586835A1 (en) * 1985-09-04 1987-03-06 Electroli Sa SELECTIVE CONTROL AND SAFETY DEVICE FOR COMBINED MACHINE
EP0214920A2 (en) * 1985-09-04 1987-03-18 Electroli, S.A. Selective and security control device for a combined machine
EP0214920A3 (en) * 1985-09-04 1988-12-14 Electroli, S.A. Selective and security control device for a combined machine
EP0874437A2 (en) * 1997-04-11 1998-10-28 Schneider Electric Sa Circuit for starting a machine or the like and method for controlling start-up of a machine
EP0874437A3 (en) * 1997-04-11 1999-08-11 Schneider Electric Sa Circuit for starting a machine or the like and method for controlling start-up of a machine

Also Published As

Publication number Publication date
DE2713872B2 (en) 1979-03-08
DE2713872A1 (en) 1977-10-13
FR2346889B2 (en) 1980-06-13
DE2713872C3 (en) 1979-10-25

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