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US 4,661,745 AGranted
Rapid-start fluorescent lamp power reducer
AssigneeGTE Products Corporation
InventorsRichard J. Citino, Carlo S. Bessone, William J. Roche
Life of this patent
Estimating the term…
Abstract
A rapid-start fluorescent lamp system includes a ballast circuit, rapid-start fluorescent lamps and power reducing means for controlling the application of energy to the lamps. The power-reducing means controls the energy to N/O switches from the energy source upon ionization of the rapid-start fluorescent lamps.
Claims7
A rapid-start fluorescent lamp power-reducing system comprising:
- a plurality of rapid-start fluorescent lamps each having a pair of spaced filaments;
- a ballast formed for connection to an energizing source and including a plurality of filament windings for energizing said filaments of said lamps;
- and
- a power-reducing means shunting one of said filament windings and including a relay having a plurality of N/O switches each coupled to a respective one of said filament windings, said power-reducing means responsive to energization from said source for operating said relay closing said N/O switches and connecting said filament windings to aid filaments of said lamps for a given period of time sufficient to effect ionization of said lamps and de-energizing said relay, opening said N/O switches and disconnecting said filament windings from said filaments of said lamps after said given period of time required to effect ionization of said lamps.
1 more element
A power-reducing system for rapid-start fluorescent lamps comprising:
- a pair of fluorescent lamps each having a pair of spaced filaments;
- a ballast connectable to an energizing source and having a plurality of filament windings;
- and
- a power-reducing means shunting one of said plurality of filament windings and including a relay having a plurality of normally-open (N/O) switch contacts each coupled to a respective one of said plurality of filament windings of said ballast, said relay formed for activating said N/O switches contacts to couple said filament windings to said lamp filaments for a period of time sufficient to effect ionization of said lamps and for decoupling said filament windings from said filaments upon ionization of said lamps.
1 more element
Dependencies are inferred from the claim text.