JPS5242399A - Alarm switch and device for monitoring lead wire thereof - Google Patents

Alarm switch and device for monitoring lead wire thereof

Info

Publication number
JPS5242399A
JPS5242399A JP11531476A JP11531476A JPS5242399A JP S5242399 A JPS5242399 A JP S5242399A JP 11531476 A JP11531476 A JP 11531476A JP 11531476 A JP11531476 A JP 11531476A JP S5242399 A JPS5242399 A JP S5242399A
Authority
JP
Japan
Prior art keywords
lead wire
alarm switch
monitoring lead
monitoring
alarm
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.)
Pending
Application number
JP11531476A
Other languages
Japanese (ja)
Inventor
Keraaman Haintsu
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.)
Siemens Corp
Original Assignee
Siemens 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 Siemens Corp filed Critical Siemens Corp
Publication of JPS5242399A publication Critical patent/JPS5242399A/en
Pending legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
    • E21F17/18—Special adaptations of signalling or alarm devices
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B23/00—Alarms responsive to unspecified undesired or abnormal conditions
    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/16—Security signalling or alarm systems, e.g. redundant systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Emergency Management (AREA)
  • Business, Economics & Management (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Electronic Switches (AREA)
  • Alarm Systems (AREA)
JP11531476A 1975-09-26 1976-09-25 Alarm switch and device for monitoring lead wire thereof Pending JPS5242399A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752542996 DE2542996B1 (en) 1975-09-26 1975-09-26 Arrangement for monitoring a signaling switch in intrinsically safe systems and the associated feed line

Publications (1)

Publication Number Publication Date
JPS5242399A true JPS5242399A (en) 1977-04-01

Family

ID=5957536

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11531476A Pending JPS5242399A (en) 1975-09-26 1976-09-25 Alarm switch and device for monitoring lead wire thereof

Country Status (2)

Country Link
JP (1) JPS5242399A (en)
DE (1) DE2542996B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6245305A (en) * 1985-08-23 1987-02-27 Toshihide Nakajima Filter
JPS62160617U (en) * 1986-03-31 1987-10-13
JPS63130109U (en) * 1987-02-16 1988-08-25

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2744690C3 (en) * 1977-09-30 1981-09-24 Siemens AG, 1000 Berlin und 8000 München Circuit arrangement for monitoring two DC-decoupled line cores
DE3001940C2 (en) * 1980-01-21 1983-01-27 Siemens AG, 1000 Berlin und 8000 München Arrangement for determining the switch position of a switch and for monitoring the associated line for short circuits and interruptions
DE3131934A1 (en) * 1981-08-12 1983-02-24 Siemens AG, 1000 Berlin und 8000 München DEVICE FOR THE DIGITAL MONITORING OF BINARY ENCODERS OR THE LIKE AND THE RELATED SUPPLY PIPES FOR CONTROL
DE3507926A1 (en) * 1985-03-06 1986-09-11 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Coupling bushing

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6245305A (en) * 1985-08-23 1987-02-27 Toshihide Nakajima Filter
JPS62160617U (en) * 1986-03-31 1987-10-13
JPS63130109U (en) * 1987-02-16 1988-08-25

Also Published As

Publication number Publication date
DE2542996B1 (en) 1976-07-08

Similar Documents

Publication Publication Date Title
ZA766719B (en) Electrical signal separating device
JPS5260097A (en) Detection and alarm warning device
AU499720B2 (en) Condition monitoring device
JPS5272438A (en) Current monitoring device for current path
GB1539385A (en) Electrical current monitoring device
JPS51146000A (en) Nut breaking device
JPS5264180A (en) Wire winding device
GB2010542B (en) Alarm switch and alarm set device
GB1554329A (en) Thread monitoring device
GB1539792A (en) Alarm device
JPS5276963A (en) Alarm device
JPS5450297A (en) Electric wire burglar alarm safety device
JPS52148156A (en) Electrical signal monitoring apparatus
JPS54140346A (en) Highhtension wire alarm device
JPS5270873A (en) Alarm device
JPS5320548A (en) Lightning alarm device
GB1555079A (en) Electric alarm apparatus
JPS5313446A (en) Operation monitoring device
JPS5230249A (en) Wire pulllout device
JPS5276962A (en) Alarm device
JPS5276964A (en) Alarm device
JPS5256278A (en) Pneumatic alarm setting device
JPS5256276A (en) Pneumatic alarm setting device
JPS5230085A (en) Device for monitoring patient
ZA751259B (en) Alarm device