Electric lamp and discharge devices: systems – With cathode or cathode heater supply circuit – Plural cathodes or heaters in the load device
Patent
1979-03-07
1980-07-29
Smith, Alfred E.
Electric lamp and discharge devices: systems
With cathode or cathode heater supply circuit
Plural cathodes or heaters in the load device
315102, 315DIG5, 315DIG7, H05B 4129, H05B 4142
Patent
active
042152925
ABSTRACT:
An apparatus for operating a gaseous discharge lamp comprises a D.C. power source, a transistor inverter which is connected to the D.C. power source through a switch, provided with at least one inverter transistor and generates an output having a prescribed frequency, and a discharge lamp which is energized by an output from the transistor inverter and having a pair of electrodes heated by part of the output. The apparatus further comprises base current control means which holds the base current of the inverter transistor at a level lower than a first level during a prescribed length of time after the close of the switch, and holds the base current at the first level after the prescribed length of time. The discharge lamp has its electrodes preheated, but does not display discharge when the base current has a level lower than the first level, and commences discharge when the base current reaches the first level and thereafter continues discharge.
REFERENCES:
patent: 3119048 (1964-01-01), Tsuchiya
patent: 3389299 (1968-06-01), Bell
patent: 4127797 (1978-11-01), Perper
patent: 4150323 (1979-04-01), Yeh et al.
Aoike Nanjou
Inui Ken'ichi
Kobayashi Hisao
Roberts Charles F.
Smith Alfred E.
Toshiba Electric Equipment Corporation
LandOfFree
Apparatus for operating a gaseous discharge lamp does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for operating a gaseous discharge lamp, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for operating a gaseous discharge lamp will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-906391