JPS5451279A - Checker for emergency lamp - Google Patents
Checker for emergency lampInfo
- Publication number
- JPS5451279A JPS5451279A JP11818177A JP11818177A JPS5451279A JP S5451279 A JPS5451279 A JP S5451279A JP 11818177 A JP11818177 A JP 11818177A JP 11818177 A JP11818177 A JP 11818177A JP S5451279 A JPS5451279 A JP S5451279A
- Authority
- JP
- Japan
- Prior art keywords
- checker
- voltage
- battery
- fluorescent lamp
- transistor
- 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 provide a checker which enables effective detection and indication of the capacity of the battery and others by drawing a voltage of a checker coil wound around an output transformer of a high frequency inverter through a band- pass filter. CONSTITUTION:When the commercial power supply is artificially suspended, connected to a battery 9 through a contact 12, a transistor inverter 10 is actuated to feed a loop current of high frequency to a fluorescent lamp 1 via an output transformer 16. In this manner, the fluorescent lamp comes on in the emergency mode. A voltage is produced in a checker coil 25 in proportion to the output voltage, so that a given voltage develops in a band-pass filter 28. If the voltage should decrease before the end of the checking due to a reduction in the capacity of the battery 9 of the like, a transistor 23 fails to conduct while a transistor 20 conducts to allow a light emitting diode 21 to illuminate. This indicates that the fluorescent lamp 1 is unable to perform any imergency lighting as expected. At the same time, the checker V can detect and indicate not only the capacity shortage of the battery 9 but also trouble of the inverter 10 and the expiration of the fluorescent lamp 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11818177A JPS5451279A (en) | 1977-09-30 | 1977-09-30 | Checker for emergency lamp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11818177A JPS5451279A (en) | 1977-09-30 | 1977-09-30 | Checker for emergency lamp |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5451279A true JPS5451279A (en) | 1979-04-21 |
Family
ID=14730135
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11818177A Pending JPS5451279A (en) | 1977-09-30 | 1977-09-30 | Checker for emergency lamp |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5451279A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006300126A (en) * | 2005-04-18 | 2006-11-02 | Nsk Ltd | Ball screw device and transfer device |
-
1977
- 1977-09-30 JP JP11818177A patent/JPS5451279A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006300126A (en) * | 2005-04-18 | 2006-11-02 | Nsk Ltd | Ball screw device and transfer device |
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