JPS54134599A - Semiconductor gas and fire alarm device - Google Patents

Semiconductor gas and fire alarm device

Info

Publication number
JPS54134599A
JPS54134599A JP4295778A JP4295778A JPS54134599A JP S54134599 A JPS54134599 A JP S54134599A JP 4295778 A JP4295778 A JP 4295778A JP 4295778 A JP4295778 A JP 4295778A JP S54134599 A JPS54134599 A JP S54134599A
Authority
JP
Japan
Prior art keywords
gas
thyristor
alarm device
semiconductor
heat
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
JP4295778A
Other languages
Japanese (ja)
Inventor
Josuke Nakada
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 JP4295778A priority Critical patent/JPS54134599A/en
Publication of JPS54134599A publication Critical patent/JPS54134599A/en
Pending legal-status Critical Current

Links

Landscapes

  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Emergency Alarm Devices (AREA)

Abstract

PURPOSE: To obtain an alarm device which senses gas and fire by connecting a semiconductor gas detection element and a heat-sensitive thyristor in the side of a semiconductor switch element and operating them according to gas densities and temperatures respectively.
CONSTITUTION: As regards gas and fire alarm device 50, semiconductor gas sensor 8 is installed near heat apparatus using gas, and thermosensitive thyristor 18 is installed on the ceiling. When the gas density in the air rises, the resistance value of sensor part 9 of gas sensor 8 is lowered rapidly, and transistor 12 is turned on to ignite thyristor 4, thereby operating alarm buzzer 3. Meanwhile, heat-sensitive thyristor 18 senses temperature rise independently of the operation of gas sensor 8; and when this thyristor 18 is turned on at a fixed temperature, thyristor 4 is ignited to operate alarm buzzer 3.
COPYRIGHT: (C)1979,JPO&Japio
JP4295778A 1978-04-11 1978-04-11 Semiconductor gas and fire alarm device Pending JPS54134599A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4295778A JPS54134599A (en) 1978-04-11 1978-04-11 Semiconductor gas and fire alarm device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4295778A JPS54134599A (en) 1978-04-11 1978-04-11 Semiconductor gas and fire alarm device

Publications (1)

Publication Number Publication Date
JPS54134599A true JPS54134599A (en) 1979-10-19

Family

ID=12650498

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4295778A Pending JPS54134599A (en) 1978-04-11 1978-04-11 Semiconductor gas and fire alarm device

Country Status (1)

Country Link
JP (1) JPS54134599A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4295028A (en) * 1979-02-23 1981-10-13 Sharp Kabushiki Kaisha Combination of gas sensor controlled cooking utensil and gas leak alarm
JPS61117442A (en) * 1984-11-14 1986-06-04 Hitachi Ltd Gas detecting device with fire alarm function
CN104217543A (en) * 2014-07-31 2014-12-17 仙桃市诚宇汽车电器有限公司 Vehicular gas alarm device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4295028A (en) * 1979-02-23 1981-10-13 Sharp Kabushiki Kaisha Combination of gas sensor controlled cooking utensil and gas leak alarm
JPS61117442A (en) * 1984-11-14 1986-06-04 Hitachi Ltd Gas detecting device with fire alarm function
JPH0511258B2 (en) * 1984-11-14 1993-02-15 Hitachi Ltd
CN104217543A (en) * 2014-07-31 2014-12-17 仙桃市诚宇汽车电器有限公司 Vehicular gas alarm device

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