Electricity: conductors and insulators – Conduits – cables or conductors – Single duct conduits
Patent
1977-03-28
1978-07-25
Truhe, J. V.
Electricity: conductors and insulators
Conduits, cables or conductors
Single duct conduits
285158, 285396, H05K 502
Patent
active
041031016
ABSTRACT:
A one-piece connector for connecting electric cables to an electrical outlet box comprises a tubular body having an inner portion adapted to fit inside an opening in an outlet box, an outer portion adapted to receive a sheathed cable therein, an annular shoulder on the connector for abutting the outer surface of the box wall, a pair of arcuate lugs provided at diametrically opposite sides of the connector for passage through recesses in the edge of the box opening when the connector is inserted in the opening, the lugs having arcuately spaced opposite side edges, raised arcuate portions between the shoulder and the arcuate lugs which exceed the diameter of the opening in the box wall and become wedged against the edge of the opening when the connector is rotated in the opening, the arcuate raised portions each beginning at one side edge of one of the arcuate lugs and terminating medially between the opposite side edges of the respective arcuate lug, flat raised portions beginning at the medial terminus of the arcuate raised portions and continuing to the other side edge of the arcuate lugs providing a raised surface of increasing diameter as the connector is rotated in order to limit the rotation of the connector in the box opening, an annular bushing inside the tubular body which is integral with the connector and is adapted to fit between the cable sheath and cable insulation at the end of a cable inserted in the outer portion of the tubular connector, and inwardly depressed helical tongues formed integral with the connector in the outer portion for engaging grooves in the cable sheath and locking the cable in the connector.
REFERENCES:
patent: 1131399 (1915-03-01), McGinley
patent: 2170010 (1939-08-01), Conner
patent: 3047829 (1962-07-01), Mouat
patent: 3369071 (1968-02-01), Tuisku
patent: 3728470 (1973-04-01), Maier
patent: 4012578 (1977-03-01), Moran et al.
Tone David A.
Truhe J. V.
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