Electric lamp and discharge devices: systems – With signal – indicator – or alarm – Plural load device systems
Patent
1990-07-30
1991-07-23
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
With signal, indicator, or alarm
Plural load device systems
315130, 340642, H05B 3700
Patent
active
050346598
ABSTRACT:
In a series lamp circuit designed to connect lamps to the secondary windings of current transformers connected in series with a constant-current power supply, the series lamp circuit provides a disconnected lamp detecting means and a short-circuit switch for each lamp. The short-circuit switch serves to short-circuit the secondary windings of the transformers in response to the output of the detecting means. By actuating the short-circuit switch, the short-circuit switch is switched off during a short-circuit releasing time defined uniquely for a lamp at each predetermined inspection period. The power device side serves to detect the quantity of disconnected lamps on the basis of the output voltage and current and detect an OFF operating time of the short-circuit switch on the basis of an output voltage waveform of the power supply. Hence, it is possible to identify which lamp is disconnected and display the identified result on a display. An alarm is issued when the disconnected lamp is detected.
REFERENCES:
patent: 3829735 (1974-08-01), Berlock et al.
patent: 4295079 (1981-10-01), Otsuka et al.
patent: 4396868 (1983-08-01), Watanabe et al.
patent: 4441055 (1984-04-01), Balchjunas et al.
patent: 4675574 (1987-06-01), Delflache
New Constant-Current Regulator for Airport Lighting, by Helmut et al., System and Equipment, 1969, pp. 355-358.
Dinh Tan Xuan
Kabushiki Kaisha Toshiba
LaRoche Eugene R.
LandOfFree
Lamp circuit with disconnected lamp detecting device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Lamp circuit with disconnected lamp detecting device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lamp circuit with disconnected lamp detecting device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-434358