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U.S. Department of Energy
Office of Scientific and Technical Information

Electrical receptacle

Patent ·
OSTI ID:6220117

The invention is a receptacle for a three prong electrical plug which has either a tubular or U-shaped grounding prong. The inventive receptacle has a grounding prong socket which is sufficiently spacious to prevent the socket from significantly stretching when a larger, U-shaped grounding prong is inserted into the socket, and having two ridges to allow a snug fit when a smaller tubular shape grounding prong is inserted into the socket. The two ridges are made to prevent the socket from expanding when either the U-shaped grounding prong or the tubular grounding prong is inserted.

DOE Contract Number:
W-7405-ENG-48
Assignee:
Dept. of Energy, Washington, DC (United States)
Patent Number(s):
A; US 5221211
Application Number:
PPN: US 7-883910
OSTI ID:
6220117
Country of Publication:
United States
Language:
English