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US 2006/0132047 A1Published application
Portable fluorescent task lamp
AssigneeBayco Products, Ltd.
InventorJames Newton
Life of this patent
Estimating the term…
Abstract
A portable hand held fluorescent task lamp comprising at least two compact fluorescent lamp (“CFL”) bulbs of any wattage and of either a non-starting type or a self-starting type; an electronic ballast circuit; and an SPST function switch disposed in series with each CFL bulb, wherein the CFL bulbs may be ignited and sustained in illumination in parallel, simultaneously or individually, as determined by the respective SPST switches.
Claims22
A portable hand held fluorescent task lamp, comprising:
- at least first and second compact fluorescent lamp (“CFL”) bulbs removably supported in an elongated housing;
- a transformerless electrical drive circuit disposed within the elongated housing, and connected at a first input to a common return node of a power supply connected to a line cord and connected via a common output node to the at least first and second CFL bulbs;
- a first series connection between the common return node and the common output node including a first current limiting inductor, a first node, a first single pole single throw (SPST) switch and the first CFL bulb;
- and
- a second series connection between the common return node and the common output node including a second current limiting inductor, a second node, a second SPST switch and the second CFL bulb;
- wherein the at least first and second CFL bulbs are ignited and sustained in illumination in parallel as determined by a respective ON or OFF condition of each respective first and second SPST switches, independent of the starting characteristics of the first and the second CFL bulbs.
3 more elements
An electrical drive circuit for a portable hand held fluorescent task lamp, comprising:
- a transformerless circuit, connected to drive at least first and second compact fluorescent lamp (“CFL”) bulbs, the transformerless circuit connected at a first input to a common return node of a power supply connected to a line cord and connected via a common output node to the at least first and second CFL bulbs;
- a first series connection between the common return node and the common output node including a first current limiting inductor, a first node, a first single pole single throw (SPST) switch and the first CFL bulb;
- and
- a second series connection between the common return node and the common output node including a second current limiting inductor, a second node, a second SPST switch and the second CFL bulb;
- wherein the at least first and second CFL bulbs are ignited and sustained in illumination in parallel as determined by a respective ON or OFF condition of each respective first and second SPST switches, independent of the starting characteristics of the first and the second CFL bulbs.
2 more elements
An electrical drive circuit for operating compact fluorescent (“CFL”) bulbs, comprising:
- a transformerless electrical drive circuit connected at a first input to a common return node of a power supply connected to a line cord and connected via a common output node to at least first and second CFL bulbs;
- a first series connection between the common return node and the common output node including a first current limiting inductor, a first node, a first single pole single throw (SPST) switch and the first CFL bulb;
- and
- a second series connection between the common return node and the common output node including a second current limiting inductor, a second node, a second SPST switch and the second CFL bulb;
- wherein the at least first and second CFL bulbs are ignited and sustained in illumination in parallel as determined by a respective ON or OFF condition of each respective first and second SPST switches, independent of the starting characteristics of the first and the second CFL bulbs.
2 more elements
Dependencies are inferred from the claim text.