THREE-PIN PLUG SOCKET OF EUROPEAN TYPE WITH EARTHING ELEMENT AND METHOD OF ITS MANUFACTURING Russian patent published in 2014 - IPC H01R13/66 

FIELD: electricity.

SUBSTANCE: three-pin plug socket of European type with an earthing element is made with a body from insulation material, two metal seats (phase and zero working) and a double earthing contact. Inside the body there is a restriction element (resistor), one end of which is connected with the zero working contact, and the second - with the earthing contact. The restriction element is made in the form of a hidden cylindrical cavity inside a non-split monolithic body of the socket, filled with elastic current-conducting material. One end of the hidden current-conducting cavity is connected to the seat of the socket, which is connected to the zero working wire of the electric network. The second end of the hidden current-conducting cavity is connected to one of doubled earthing contacts of the socket, designed for connection with the earthing conductor of the three-core electric cord of a domestic electrical appliance. The socket also comprises a miniature neon lamp designed to alarm connection of the socket seat exactly with the zero working wire.

EFFECT: provision of reliable and safe earthing of electric equipment in double-wire networks using a plug socket with full automation of its manufacturing with reduction of number of process operations.

2 cl, 1 dwg