JPS5851388U - 火災警報地区ベル線の障害検出回路 - Google Patents

火災警報地区ベル線の障害検出回路

Info

Publication number
JPS5851388U
JPS5851388U JP14396681U JP14396681U JPS5851388U JP S5851388 U JPS5851388 U JP S5851388U JP 14396681 U JP14396681 U JP 14396681U JP 14396681 U JP14396681 U JP 14396681U JP S5851388 U JPS5851388 U JP S5851388U
Authority
JP
Japan
Prior art keywords
detection circuit
terminal
power source
fire alarm
series
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
JP14396681U
Other languages
English (en)
Japanese (ja)
Other versions
JPS6339820Y2 (ko
Inventor
浩司 大内
Original Assignee
ニツタン株式会社
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 ニツタン株式会社 filed Critical ニツタン株式会社
Priority to JP14396681U priority Critical patent/JPS5851388U/ja
Publication of JPS5851388U publication Critical patent/JPS5851388U/ja
Application granted granted Critical
Publication of JPS6339820Y2 publication Critical patent/JPS6339820Y2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Alarm Systems (AREA)
  • Fire Alarms (AREA)
JP14396681U 1981-09-30 1981-09-30 火災警報地区ベル線の障害検出回路 Granted JPS5851388U (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14396681U JPS5851388U (ja) 1981-09-30 1981-09-30 火災警報地区ベル線の障害検出回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14396681U JPS5851388U (ja) 1981-09-30 1981-09-30 火災警報地区ベル線の障害検出回路

Publications (2)

Publication Number Publication Date
JPS5851388U true JPS5851388U (ja) 1983-04-07
JPS6339820Y2 JPS6339820Y2 (ko) 1988-10-19

Family

ID=29936931

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14396681U Granted JPS5851388U (ja) 1981-09-30 1981-09-30 火災警報地区ベル線の障害検出回路

Country Status (1)

Country Link
JP (1) JPS5851388U (ko)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6237391U (ko) * 1985-08-16 1987-03-05
JPH01174647U (ko) * 1988-05-30 1989-12-12

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5258396A (en) * 1975-11-10 1977-05-13 Nittan Co Ltd Device for monitoring disconnection of bell wire for fire alarm
JPS5422759U (ko) * 1977-07-18 1979-02-14

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5258396A (en) * 1975-11-10 1977-05-13 Nittan Co Ltd Device for monitoring disconnection of bell wire for fire alarm
JPS5422759U (ko) * 1977-07-18 1979-02-14

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6237391U (ko) * 1985-08-16 1987-03-05
JPH01174647U (ko) * 1988-05-30 1989-12-12
JPH0534345Y2 (ko) * 1988-05-30 1993-08-31

Also Published As

Publication number Publication date
JPS6339820Y2 (ko) 1988-10-19

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