JPS531000A - Automatic fire alarm - Google Patents

Automatic fire alarm

Info

Publication number
JPS531000A
JPS531000A JP7442876A JP7442876A JPS531000A JP S531000 A JPS531000 A JP S531000A JP 7442876 A JP7442876 A JP 7442876A JP 7442876 A JP7442876 A JP 7442876A JP S531000 A JPS531000 A JP S531000A
Authority
JP
Japan
Prior art keywords
fire alarm
automatic fire
conduction
making
zener diode
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
JP7442876A
Other languages
Japanese (ja)
Inventor
Toshihiro Kimura
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP7442876A priority Critical patent/JPS531000A/en
Publication of JPS531000A publication Critical patent/JPS531000A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To enable simple individual discrimination by applying voltage that is of reversed polarity and gradually increasing when one of detectors operates and by making a specified indicator of the detected site perform indicating action when Zener diode comes to conduction.
COPYRIGHT: (C)1978,JPO&Japio
JP7442876A 1976-06-25 1976-06-25 Automatic fire alarm Pending JPS531000A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7442876A JPS531000A (en) 1976-06-25 1976-06-25 Automatic fire alarm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7442876A JPS531000A (en) 1976-06-25 1976-06-25 Automatic fire alarm

Publications (1)

Publication Number Publication Date
JPS531000A true JPS531000A (en) 1978-01-07

Family

ID=13546920

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7442876A Pending JPS531000A (en) 1976-06-25 1976-06-25 Automatic fire alarm

Country Status (1)

Country Link
JP (1) JPS531000A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58134393A (en) * 1982-02-05 1983-08-10 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Alarm control central unit
JPS6214594U (en) * 1985-07-11 1987-01-28

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58134393A (en) * 1982-02-05 1983-08-10 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン Alarm control central unit
JPH055149B2 (en) * 1982-02-05 1993-01-21 Fuiritsupusu Furuuiranpenfuaburiken Nv
JPS6214594U (en) * 1985-07-11 1987-01-28

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