Geometrical instruments
Patent
1975-11-17
1977-04-26
Lake, Roy
Geometrical instruments
H01R 306
Patent
active
040197972
ABSTRACT:
This relates to an electrical connecting device or plug, preferably of the U-grounded type, which when plugged into a standard split wire duplex receptacle will double the voltage potential available at the receptacle. A modified form of the invention comprises an electrical connecting device or plug which when plugged into a standard split wire duplex receptacle will provide an option of either doubling the voltage potential available at the receptacle or, alternatively, operating as a single plug for a pair of appliances, each at normal household voltage.
REFERENCES:
patent: 3784953 (1974-01-01), Lingaraju
patent: 3861773 (1975-01-01), Triantafellow et al.
Jones DeWalden W.
Lake Roy
Pugh Martha G.
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