US 4,070,556 AGranted

Plug-and-socket connection

OwnerRudolf Kofmelinventor

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Abstract

An electrical plug and socket connection which has an axially symmetrical plug body, a central aperture in the plug body for receiving a multi-conductor electrical cable and a cylindrical extension secured to the plug body in alignment with the axis thereof which defines a stop surface at the end thereof remote from the plug body. At least one contact ring is disposed coaxially with the extension between the plug body and the stop surface. The contact ring has an exposed outer surface. At least one contact element defined by a radially movable stud secured to one end of a flat spring projects partially into a cavity of the socket portion for cooperation with the contact ring. When the extension of the plug is inserted into the socket the stud and the associated flat spring are pushed radially outward with respect to the axis of the extension into electrical contact with a life terminal of the socket to thereby act as a switch which is closed upon the insertion of the extension into the socket and which electrically connects the contact ring with the life terminal.

Claims4

Dependent claims

In a plug-and-socket connection for connecting at least two electric conductors of a cable to two other electric conductors, of the type wherein a socket protion having at least two terminals for said two other electric conductors is provided with a cavity for receiving part of a plug portion, the improvement comprising:

an axially symmetrical plug body,
a central aperture in said plug body for receiving said cable,
a cylindrical extension secured to said plug body in alignment with the axis of said body, said extension having a stop surface at an end thereof remote from said body,
at least one contact ring disposed coaxially with said extension between said plug body and said stop surface, said contact ring having an exposed outer surface,
at least one contact element comprising a radially movable stud secured to one end of a first flat spring, said stud projecting partially into said cavity of said socket portion for cooperation with said contact ring so that said stud rests against said contact ring upon complete insertion of said extension into said cavity, and
switch means disposed on said socket portion for cooperation with said stop surface upon insertion of said extension into said cavity, said switch means comprising a contact nipple secured to an other end of said first flat spring and a second flat spring secured to one of said terminals and partially overlapping said first flat spring, whereby said contact nipple contacts said second flat spring upon complete insertion of said extension into said cavity.

3 more elements

Dependencies are inferred from the claim text.