Electronic incandescent lighting product

Details Electronic incandescent lighting product Electronic incandescent lighting product

1990-01-25

1991-05-21

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Discharge device and/or rectifier in the supply circuit

Flashers

315 70, 315219, 315DIG7, H05B 3900, H05B 4114

Patent

active

050178385

ABSTRACT:
At the lumen output levels of most ordinary household incandescent lamps, incandescent filaments designed for and operated at about 24 Volt RMS provide substantially higher luminous efficacy than filaments designed for and operated at 120 Volt RMS.
A frequency converter, which is adapted to be plugged into and held by an ordinary household electric receptacle, coverts the 120 Volt/60 Hz received from the power line to an output of 120 Volt/30 kHz and provides this output at a receptacle adapted to receive and hold an ordinary power plug.
The power plug of an ordinary table lamp is plugged into this frequency converter, thereby providing 120 Volt/30 kHz to its lamp socket instead of the normal 120 Volt/60 Hz.
With 120 Volt/30 kHz on the lamp socket, any ordinary 120 Volt incandescent lamp can be used therein; as can also any special incandescent lamp having a 24 Volt filament in combination with a built-in 30 kHz voltage transformer operative to convert the 120 Volt/30 kHz socket voltage into 24 Volt/30 kHz voltage for the filament.
While the size of a 60 Hz transformer capable of efficiently transforming the amount of power required by the 24 Volt filament would be far too large to be contained within a light bulb of ordinary dimensions; the size of a corresponding 30 kHz transformer is small enough to fit comfortably within the dimensions of an ordinary light bulb.

REFERENCES:
patent: 2587169 (1952-02-01), Kivari
patent: 3525012 (1970-08-01), Dimitracopoulos et al.
patent: 4163176 (1979-07-01), Cohen et al.
patent: 4207497 (1980-06-01), Capewell et al.
patent: 4443778 (1984-04-01), Mewissen
patent: 4480212 (1984-10-01), Monahan et al.

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