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JPS5343499A - Smoke detector - Google Patents

Smoke detector

Info

Publication number
JPS5343499A
JPS5343499A JP11822076A JP11822076A JPS5343499A JP S5343499 A JPS5343499 A JP S5343499A JP 11822076 A JP11822076 A JP 11822076A JP 11822076 A JP11822076 A JP 11822076A JP S5343499 A JPS5343499 A JP S5343499A
Authority
JP
Japan
Prior art keywords
time
receiving
values
smoke detector
fixed time
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
JP11822076A
Other languages
Japanese (ja)
Inventor
Sumio Kondo
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP11822076A priority Critical patent/JPS5343499A/en
Publication of JPS5343499A publication Critical patent/JPS5343499A/en
Pending legal-status Critical Current

Links

Landscapes

  • Fire-Detection Mechanisms (AREA)

Abstract

PURPOSE: To trigger an alarm only at the change of a signal voltage faster than the time delay of a comparator by providing a memory circuit which stores the values of receiving levels in a receiving part which receives the light signal from a transmitting part, for a fixed time, and comparing the values of the receiving levels changing from time to time with the receiving level before a fixed time.
COPYRIGHT: (C)1978,JPO&Japio
JP11822076A 1976-10-01 1976-10-01 Smoke detector Pending JPS5343499A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11822076A JPS5343499A (en) 1976-10-01 1976-10-01 Smoke detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11822076A JPS5343499A (en) 1976-10-01 1976-10-01 Smoke detector

Publications (1)

Publication Number Publication Date
JPS5343499A true JPS5343499A (en) 1978-04-19

Family

ID=14731183

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11822076A Pending JPS5343499A (en) 1976-10-01 1976-10-01 Smoke detector

Country Status (1)

Country Link
JP (1) JPS5343499A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6020299A (en) * 1983-07-15 1985-02-01 ホーチキ株式会社 fire detection device
KR20210097183A (en) * 2018-12-07 2021-08-06 카와사키 주코교 카부시키 카이샤 Substrate transfer apparatus and its operating method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6020299A (en) * 1983-07-15 1985-02-01 ホーチキ株式会社 fire detection device
KR20210097183A (en) * 2018-12-07 2021-08-06 카와사키 주코교 카부시키 카이샤 Substrate transfer apparatus and its operating method

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