JPS55105135A - Alarm circuit - Google Patents
Alarm circuitInfo
- Publication number
- JPS55105135A JPS55105135A JP11323878A JP11323878A JPS55105135A JP S55105135 A JPS55105135 A JP S55105135A JP 11323878 A JP11323878 A JP 11323878A JP 11323878 A JP11323878 A JP 11323878A JP S55105135 A JPS55105135 A JP S55105135A
- Authority
- JP
- Japan
- Prior art keywords
- ventilating fan
- motor
- circuit
- flame
- terminals
- 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
Abstract
PURPOSE: To ensure detection of abnormality of a protective device by detecting the drive of a motor for a ventilating fan and conducting logical operation for the signal thereof and a signal indicating the presence of flame.
CONSTITUTION: Terminals T1 and T2 of a bidirectional thyristor 7 are connected in series with a switch 10 of a ventilating fan 9, motor 11 and power source 16, controlling the operation of the motor 11. When the ventilating fan 9 is in the state of interruption, the potential difference between terminals T1 and G i.e. the difference between both ends of a resistance 8 becomes zero and an input is made in a logical operation circuit 13. When the presence of a flame is detected by a photoelectric converter element 2 under the condition, the output of the circuit 13 turns to be positive and puts a light to a neon lamp 14 through the bidirectional thyristor 17, operating a buzzer 12. In the state of continuity of the ventilating fan 9, a potential difference is produced between both ends of the resistance 8 and the output of the circuit 13 becomes zero.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11323878A JPS55105135A (en) | 1978-09-14 | 1978-09-14 | Alarm circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11323878A JPS55105135A (en) | 1978-09-14 | 1978-09-14 | Alarm circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55105135A true JPS55105135A (en) | 1980-08-12 |
Family
ID=14607059
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11323878A Pending JPS55105135A (en) | 1978-09-14 | 1978-09-14 | Alarm circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55105135A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005345314A (en) * | 2004-06-04 | 2005-12-15 | Ocean High Technology Institute Inc | Weighing method by windshield-equipped balance and windshield-equipped balance |
-
1978
- 1978-09-14 JP JP11323878A patent/JPS55105135A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005345314A (en) * | 2004-06-04 | 2005-12-15 | Ocean High Technology Institute Inc | Weighing method by windshield-equipped balance and windshield-equipped balance |
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