Electric lamp and discharge devices: systems – With signal – indicator – or alarm – Plural load device systems
Patent
1980-03-25
1981-10-13
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
With signal, indicator, or alarm
Plural load device systems
315135, 315256, 340642, H05B 3703
Patent
active
042950791
ABSTRACT:
A lamp circuit is provided having a constant current type AC power source and a plurality of isolation transformers connected in series with the AC power source. The secondary circuit of each isolation transformer is connected to an electric lamp. The voltage-time area, which is measured from the rise of the voltage output signal of the power source to the rise of the current output signal of the power source is detected and is compared with a reference predetermined value. Thereby when the detected value exceeds the reference value an alarm signal is generated and the number of the disconnected lamps can be determined and displayed.
REFERENCES:
patent: 3465326 (1969-09-01), Weir et al.
patent: 3829735 (1974-08-01), Berlock et al.
Hosokawa Yorio
Otsuka Kenichi
LaRoche Eugene R.
Tokyo Shibaura Denki Kabushiki Kaisha
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-933206