Patent ID: 6452316
Filing Date: 2002-09-17
Classification: F21L,F21V

Abstract:
A self aligning pen light bulb to provide for a production of a beam of light in response to an introduction of a power flow, the self aligning pen light bulb comprising:a) a housing having a circular body and a circular base, the circular body having an upper extent having an opening thereat, the circular base positioned distal from the opening at the upper extent of the circular body, the circular base generally planar with an aperture therethrough, the housing having an interior and an exterior, at least a portion of the exterior forming a first power coupling to provide for a passage of the power flow from the exterior of the housing to the interior of the housing, the housing having a central axis through the interior of the housing and extending from a central position on the circular base to a central position of the opening at the upper extent and wherein the circular base further has a spring contact surface and wherein the spring contact surface of the circular base has an area of between nine and four tenths square millimeters and eleven square millimeters; b) a second power coupling positioned to extend from the exterior of the circular base generally aligned with the central axis of the housing, the second power coupling to provide for a passage of the power flow to the interior of the housing; c) an insulator positioned between the second power coupling and the exterior of the circular base to prevent passage of the power flow from the second power coupling and the exterior of the housing; d) a filament in communication with the first power coupling and the second power coupling, the filament to produce a light during the introduction of the power flow; e) a focusing lens protective element having a focusing portion, an upper tapered portion, a lower tapered portion and a mounting portion, the focusing portion having optical qualities to provide for a focusing of the light produced by the filament, the focusing portion radially disposed about the central axis of the housing distal from the housing, the upper tapered portion radially disposed about the central axis of the housing, the upper tapered portion extending from the focusing portion toward the housing, the upper tapered portion having an angle of taper extending outward from the focusing portion toward the housing, the lower tapered portion radially disposed about the central axis of the housing, the lower tapered portion extending from the upper tapered portion toward the housing, the lower tapered portion having an angle of taper extending outward from the upper tapered portion toward the housing and wherein the angle of taper of the lower tapered portion is significantly greater than the angle of taper of the upper tapered portion, the mounting portion extending from the lower tapered portion into the interior of the housing.