Electrical connectors – With circuit component or comprising connector which fully... – Termination circuit
Reexamination Certificate
2000-02-04
2001-05-08
Nguyen, Khiem (Department: 2839)
Electrical connectors
With circuit component or comprising connector which fully...
Termination circuit
C439S667000, C200S051170
Reexamination Certificate
active
06227912
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to electric elements, and more specifically to a lamp socket.
A conventional lamp socket A, as shown in FIG.
8
. comprises a rotary switch control knob A
1
rotated to turn on/off the tungsten bulb B installed therein. Because the rotary switch control knob A
1
simply controls on/off status of the bulb B, the bulb B provides only a fixed intensity of light.
SUMMARY OF THE INVENTION
The present invention provides an improved structure of lamp socket, which can be turned between three status, namely, the off status, the full light intensity status, and the half light intensity status. According to the preferred embodiment of the present invention, the lamp socket comprises a plastic socket shell, the plastic socket shell comprising a big opening and a small opening, a partition board and a metal socket body connected to the plastic socket shell, the partition board being disposed between the metal socket body and the plastic socket shell and having a metal spring plate mounted thereon, a metal block fixedly provided at one side of the plastic socket shell and connected to the metal socket body by rivet means for the connection of one AC wire, wherein the plastic socket shell comprises a rectangular chamber at a top side thereof, two through holes bilaterally disposed through the rectangular chamber, and two locating grooves at two opposite sides of the big opening; left metal contact unit and right metal contact unit respectively installed in the locating grooves in the plastic socket shell; a diode mounted in the rectangular chamber, having two opposite ends respectively fastened to the left metal contact unit and the right metal contact unit; a rotary switch control knob inserted through the small opening into the big opening and rotated between a first position where the lamp bulb which is installed in the metal socket body is off, a second position where electric current is directly transmitted to the lamp bulb and the lamp bulb is turned to a full light intensity status, and a third position where electric current is transmitted to the lamp bulb through the diode and the lamp bulb is turned to a half light intensity status.
REFERENCES:
patent: 1522148 (1925-01-01), Seltzer
patent: 5150008 (1992-09-01), Lee
patent: 5783788 (1998-07-01), Jones et al.
Nguyen Khiem
Pro-Techtor Inter-national Services
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