JPS6339820Y2 - - Google Patents

Info

Publication number
JPS6339820Y2
JPS6339820Y2 JP1981143966U JP14396681U JPS6339820Y2 JP S6339820 Y2 JPS6339820 Y2 JP S6339820Y2 JP 1981143966 U JP1981143966 U JP 1981143966U JP 14396681 U JP14396681 U JP 14396681U JP S6339820 Y2 JPS6339820 Y2 JP S6339820Y2
Authority
JP
Japan
Prior art keywords
terminal
detection circuit
bell
transistor
power supply
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
JP1981143966U
Other languages
English (en)
Japanese (ja)
Other versions
JPS5851388U (ja
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 filed Critical
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 JPS5851388U (ja) 1983-04-07
JPS6339820Y2 true JPS6339820Y2 (zh) 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 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0426945Y2 (zh) * 1985-08-16 1992-06-29
JPH0534345Y2 (zh) * 1988-05-30 1993-08-31

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 (zh) * 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 (zh) * 1977-07-18 1979-02-14

Also Published As

Publication number Publication date
JPS5851388U (ja) 1983-04-07

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