Patent ID: 8796910
Filing Date: 2014-08-05
Classification: H01K

Abstract:
1. A lamp, comprising: a bulb having an enclosed space with a sealed base at a bottom of the bulb with connectors provided thereon for connection to an external power source; a support bar that extends in a first direction a first prescribed distance across the enclosed space; and a filament having a prescribed length, wherein a portion of the filament wraps around an outer surface of the support bar, the filament comprising a first filament part and a second filament part, ends of the first and second filament parts being electrically coupled to the connectors near the bottom of the bulb, wherein the first and second filament parts are spaced apart from each other in a direction parallel to the first direction of the support bar, and the first and second filament parts are spaced apart from each other in a second direction perpendicular to the first direction, wherein the first and second filament parts define a second prescribed distance near the connectors in the first direction and a third prescribed distance near the connectors in the second direction, and wherein the second prescribed distance is less than the first prescribed distance and is larger than the third prescribed distance, and a diameter of the support bar is less than the second prescribed distance and is larger than the third prescribed distance.