Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific circuit breaker or control structure
Reexamination Certificate
2000-04-04
2001-12-11
Huynh, Kim (Department: 2836)
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific circuit breaker or control structure
C361S623000, C439S651000, C439S652000
Reexamination Certificate
active
06330144
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a multi-voltage multi-pole electric adapter, and more particularly to such an electric adapter, which comprises a plug unit for receiving low voltage (AC125V) power input or high voltage (AC250V) power input, a socket unit for power output, and a transformer for converting inputted power supply from the plug unit into the desired level for the socket unit.
Following fast development of high technology, a variety of advanced electronic apparatus have been disclosed for different purposes. However, because different countries have different electric codes, different electric sockets and electric plugs are used in different countries. For connecting an electric plug to an electric socket of a different specification, an adapter shall be used. However, regular adapters for this purpose are constructed to fit one particular voltage power supply only.
SUMMARY OF THE INVENTION
The present invention has been accomplished under the circumstances in view. It is one object of the present invention to provide a multi-voltage multi-pole safety electric adapter, which is adapted to connect any of a variety of electric sockets to any of a variety of electric plugs. It is another object of the present invention to provide a multi-voltage multi-pole safety electric adapter, which fits different voltage levels. According to one aspect of the present invention, the multi-voltage multi-pole safety electric adapter comprises a socket unit, the socket unit comprising a face panel, the face panel comprising a first set of plug holes for receiving a low voltage plug and a second set of plug holes for receiving a high voltage plug, a low voltage metal bracket and a high voltage metal bracket respectively mounted on the inside corresponding to the first set of plug holes and the second set of plug holes, a first set of metal contacts and a second set of metal contacts respectively disposed at a back side wall thereof and connected to the low voltage metal bracket and the high voltage metal bracket for low voltage power input and high voltage power input respectively; a low voltage plug unit and a high voltage plug unit alternatively fastened to the back side wall of the socket unit for receiving a low voltage power supply from or high voltage power supply from an electric outlet, the low voltage plug unit comprising a set of metal contacts corresponding to the first set of metal contacts at said socket unit, the high voltage plug unit comprising a set of metal contacts corresponding to the second set of metal contacts at the socket unit; a transformer installed in the socket unit and connected between the first set of metal contacts and second set of metal contacts of the socket unit and the low voltage metal bracket and high voltage metal bracket of the socket unit for converting low voltage input power supply or high voltage input power supply into the desired power level; and a circuit breaker connected between the transformer and the low voltage metal bracket and high voltage metal bracket. According to another aspect of the present invention, low voltage indicator light means and high voltage indicator light means may be installed in the socket unit for the indication of the current voltage level in work. According to another aspect of the present invention, safety switch means may be installed in the socket unit to prevent an accident due to the insertion of a wrong plug into the plugholes on the face panel.
REFERENCES:
patent: 5164609 (1992-11-01), Poppe et al.
patent: 5272587 (1993-12-01), Wan
patent: 6111772 (2000-08-01), Lee et al.
patent: 6113434 (2000-09-01), Pate
Lee Chiu-Shan
Li Shen Su-Chen
Huynh Kim
Rosenberg , Klein & Lee
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