JPS5252396A - Transmission type smoke detector - Google Patents

Transmission type smoke detector

Info

Publication number
JPS5252396A
JPS5252396A JP12748375A JP12748375A JPS5252396A JP S5252396 A JPS5252396 A JP S5252396A JP 12748375 A JP12748375 A JP 12748375A JP 12748375 A JP12748375 A JP 12748375A JP S5252396 A JPS5252396 A JP S5252396A
Authority
JP
Japan
Prior art keywords
transmission type
smoke detector
type smoke
light receiving
receiving element
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
JP12748375A
Other languages
Japanese (ja)
Inventor
Shigeru Kajii
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.)
Hochiki Corp
Original Assignee
Hochiki 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 Hochiki Corp filed Critical Hochiki Corp
Priority to JP12748375A priority Critical patent/JPS5252396A/en
Publication of JPS5252396A publication Critical patent/JPS5252396A/en
Pending legal-status Critical Current

Links

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  • Fire-Detection Mechanisms (AREA)

Abstract

PURPOSE: The transmission type smoke detector so designed as to prevent the reduced output of a light receiving element owing to deposition of dust and dirt, deterioration of a light emitting element, etc. and detect the reduced output of the light receiving element owing to the entry of smoke.
COPYRIGHT: (C)1977,JPO&Japio
JP12748375A 1975-10-24 1975-10-24 Transmission type smoke detector Pending JPS5252396A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12748375A JPS5252396A (en) 1975-10-24 1975-10-24 Transmission type smoke detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12748375A JPS5252396A (en) 1975-10-24 1975-10-24 Transmission type smoke detector

Publications (1)

Publication Number Publication Date
JPS5252396A true JPS5252396A (en) 1977-04-27

Family

ID=14961047

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12748375A Pending JPS5252396A (en) 1975-10-24 1975-10-24 Transmission type smoke detector

Country Status (1)

Country Link
JP (1) JPS5252396A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4838998A (en) * 1971-09-20 1973-06-08

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4838998A (en) * 1971-09-20 1973-06-08

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