JPS6273400A - 警報装置 - Google Patents

警報装置

Info

Publication number
JPS6273400A
JPS6273400A JP21220885A JP21220885A JPS6273400A JP S6273400 A JPS6273400 A JP S6273400A JP 21220885 A JP21220885 A JP 21220885A JP 21220885 A JP21220885 A JP 21220885A JP S6273400 A JPS6273400 A JP S6273400A
Authority
JP
Japan
Prior art keywords
pair
lines
circuit
disconnection
short
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
JP21220885A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0471238B2 (pm
Inventor
木村　徹男
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.)
Nittan Co Ltd
Original Assignee
Nittan 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 Nittan Co Ltd filed Critical Nittan Co Ltd
Priority to JP21220885A priority Critical patent/JPS6273400A/ja
Publication of JPS6273400A publication Critical patent/JPS6273400A/ja
Publication of JPH0471238B2 publication Critical patent/JPH0471238B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Alarm Systems (AREA)
JP21220885A 1985-09-27 1985-09-27 警報装置 Granted JPS6273400A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21220885A JPS6273400A (ja) 1985-09-27 1985-09-27 警報装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21220885A JPS6273400A (ja) 1985-09-27 1985-09-27 警報装置

Publications (2)

Publication Number Publication Date
JPS6273400A true JPS6273400A (ja) 1987-04-04
JPH0471238B2 JPH0471238B2 (pm) 1992-11-13

Family

ID=16618715

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21220885A Granted JPS6273400A (ja) 1985-09-27 1985-09-27 警報装置

Country Status (1)

Country Link
JP (1) JPS6273400A (pm)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0697684A1 (en) 1994-08-18 1996-02-21 Nohmi Bosai Ltd. Transmission line monitoring apparatus for use in a fire alarm system
US5631795A (en) * 1993-05-25 1997-05-20 Hochiki Corporation Line fault monitoring apparatus
JP2017510917A (ja) * 2014-02-13 2017-04-13 ビー−アイ・インダストリアル・カンパニー、リミテッド 双方向通信機能を有する危険区域内取付用の火災及びガス検知システム

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5486986U (pm) * 1977-11-26 1979-06-20

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5486986U (pm) * 1977-11-26 1979-06-20

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5631795A (en) * 1993-05-25 1997-05-20 Hochiki Corporation Line fault monitoring apparatus
EP0697684A1 (en) 1994-08-18 1996-02-21 Nohmi Bosai Ltd. Transmission line monitoring apparatus for use in a fire alarm system
JP2017510917A (ja) * 2014-02-13 2017-04-13 ビー−アイ・インダストリアル・カンパニー、リミテッド 双方向通信機能を有する危険区域内取付用の火災及びガス検知システム

Also Published As

Publication number Publication date
JPH0471238B2 (pm) 1992-11-13

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