Geometrical instruments
Patent
1979-04-06
1980-12-23
Lazarus, Richard B.
Geometrical instruments
339157R, 339184M, 339192R, H01R 466
Patent
active
042406862
ABSTRACT:
A receptacle for receiving three plugs with ground prongs is disclosed. The blade receiving openings in the cover plate are arranged in two parallel lines with the ground prong receiving openings disposed along the center line of the cover plate. A non-conductive body member includes cavities for receiving ground prong contacts. These contacts extend from a grounding strap which is secured between the upper surface of the body member and the cover plate. The blades of plugs pass through the grounding strap into engagement with underlying contact assemblies which are secured within the body member.
REFERENCES:
patent: 3310770 (1967-03-01), Ramsing
patent: 3327277 (1967-06-01), Ramsing
General Signal Corporation
Jones DeWalden W.
Lazarus Richard B.
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