JPS56149231A - Detecting method for breaking of electric-light bulb filament - Google Patents
Detecting method for breaking of electric-light bulb filamentInfo
- Publication number
- JPS56149231A JPS56149231A JP5271880A JP5271880A JPS56149231A JP S56149231 A JPS56149231 A JP S56149231A JP 5271880 A JP5271880 A JP 5271880A JP 5271880 A JP5271880 A JP 5271880A JP S56149231 A JPS56149231 A JP S56149231A
- Authority
- JP
- Japan
- Prior art keywords
- breaking
- light
- lamp
- filament
- switch
- 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 prevent false judgement due to the sunlight entering an optical fiber and the light of a following vehicle by retaining a detection signal on breaking on the bulb filament of an automobile lamp until all the power sources of the automobile are put out.
CONSTITUTION: The light from the bulb passes through the optical fiber 2 and thence to a photoelectric transducer 3 and a retaining circuit 4. When the light enters the photoelectric transducer, the output thereof is turned zero, and when the light does not enter the same, it is turned "1", and the signal is retained by the retaining circuit until all the power sources are put out, whereby false judgement by temporary outside light is prevented. So as to prevent the putting-out of an unrequired lamp from being judged as the filament breaking, a control switch 9 is provided in linkage and in parallel to a lamp switch 8 and is constituted so that when the switch is ON, the retaining circuit is kept in the state of waiting for detection of the breaking.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5271880A JPS56149231A (en) | 1980-04-21 | 1980-04-21 | Detecting method for breaking of electric-light bulb filament |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5271880A JPS56149231A (en) | 1980-04-21 | 1980-04-21 | Detecting method for breaking of electric-light bulb filament |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56149231A true JPS56149231A (en) | 1981-11-19 |
Family
ID=12922687
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5271880A Pending JPS56149231A (en) | 1980-04-21 | 1980-04-21 | Detecting method for breaking of electric-light bulb filament |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56149231A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS491815A (en) * | 1972-04-25 | 1974-01-09 | ||
JPS5122615U (en) * | 1974-08-08 | 1976-02-19 |
-
1980
- 1980-04-21 JP JP5271880A patent/JPS56149231A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS491815A (en) * | 1972-04-25 | 1974-01-09 | ||
JPS5122615U (en) * | 1974-08-08 | 1976-02-19 |
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