JPS5451279A - Checker for emergency lamp - Google Patents

Checker for emergency lamp

Info

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
Application number
JP11818177A
Other languages
Japanese (ja)
Inventor
Shozo Kataoka
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.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
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 Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP11818177A priority Critical patent/JPS5451279A/en
Publication of JPS5451279A publication Critical patent/JPS5451279A/en
Pending legal-status Critical Current

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.
JP11818177A 1977-09-30 1977-09-30 Checker for emergency lamp Pending JPS5451279A (en)

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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006300126A (en) * 2005-04-18 2006-11-02 Nsk Ltd Ball screw device and transfer device

Cited By (1)

* Cited by examiner, † Cited by third party
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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