JPS5383676A - Ionization type smoke detector - Google Patents

Ionization type smoke detector

Info

Publication number
JPS5383676A
JPS5383676A JP15973376A JP15973376A JPS5383676A JP S5383676 A JPS5383676 A JP S5383676A JP 15973376 A JP15973376 A JP 15973376A JP 15973376 A JP15973376 A JP 15973376A JP S5383676 A JPS5383676 A JP S5383676A
Authority
JP
Japan
Prior art keywords
smoke detector
type smoke
ionization type
smoke
alarmwhen
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
JP15973376A
Other languages
Japanese (ja)
Inventor
Tsunehiko Araki
Yoshihiko Okuda
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP15973376A priority Critical patent/JPS5383676A/en
Publication of JPS5383676A publication Critical patent/JPS5383676A/en
Pending legal-status Critical Current

Links

Landscapes

  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

PURPOSE: To eliminate change with time of smoke sensitivity owing to the attenuation of radioactivity and make possible the use of a radiation source of a short half-life by periodically rewriting and storing the maximum value of ion current and prodicing an alarmwhen a elevel difference is above a fixed value in the event of evolution of smoke.
COPYRIGHT: (C)1978,JPO&Japio
JP15973376A 1976-12-28 1976-12-28 Ionization type smoke detector Pending JPS5383676A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15973376A JPS5383676A (en) 1976-12-28 1976-12-28 Ionization type smoke detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15973376A JPS5383676A (en) 1976-12-28 1976-12-28 Ionization type smoke detector

Publications (1)

Publication Number Publication Date
JPS5383676A true JPS5383676A (en) 1978-07-24

Family

ID=15700072

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15973376A Pending JPS5383676A (en) 1976-12-28 1976-12-28 Ionization type smoke detector

Country Status (1)

Country Link
JP (1) JPS5383676A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11164691B2 (en) 2016-08-16 2021-11-02 Jing-Jin Electric Technologies Co., Ltd. Split-body electromagnet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11164691B2 (en) 2016-08-16 2021-11-02 Jing-Jin Electric Technologies Co., Ltd. Split-body electromagnet

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