Geometrical instruments
Patent
1976-01-15
1977-02-15
Lake, Roy
Geometrical instruments
339 75P, H01R 306
Patent
active
040079767
ABSTRACT:
An electrical connector including selective polarization keying between the ground pin contact and ground socket contact. A rotatable sleeve around the ground socket contact selectively locks the ground pin contact in position or prevents insertion thereof when a circuit breaker is on.
REFERENCES:
patent: 3345603 (1967-10-01), Cohen
Jones DeWalden W.
Lake Roy
Midland-Ross Corporation
Switzer H. Duane
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