JPS54134599A - Semiconductor gas and fire alarm device - Google Patents
Semiconductor gas and fire alarm deviceInfo
- 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
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
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)
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 |
-
1978
- 1978-04-11 JP JP4295778A patent/JPS54134599A/en active Pending
Cited By (4)
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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