Patent ID: 6343871
Filing Date: 2002-02-05
Classification: F21K,F21Y,G09F,Y10S

Abstract:
A body height adjustable electric bulb for an illuminated signs lamp comprising; a bulb body, a bulb head, a connector, a plurality of light emitting diodes set around at least a portion of periphery of said bulb body, and a power supply unit to power said light emitting diodes, a height adjusting unit inserted into an open end of said bulb body so as to create a frictional sliding engagement between said height adjusting unit and said bulb body such that the height of said bulb body can be adjusted relative to said bulb head by a force applied against the friction, said connector being fixed on said bulb head at one end and another end connected to a joint end of said height adjusting unit such that said bulb body can be rotated by an applied torque, andsaid power supply unit being mounted within at least one of said bulb body and said height adjusting unit.