# US 10,348,024 B2 · Electrical plug and socket assembly > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,348,024 B2 - Document ID: US10348024B2 - Status: Granted - Kind: B2 - Application number: 15/740,946 - Filed: 2016-06-28 - Published: 2018-07-05 - Granted: 2019-07-09 - Earliest claimed: 2015-07-01 - Assignees: Gulplug - Applicants: Gulplug - Inventors: Jean-Paul Yonnet - Web page: https://patentgrep.com/patent/US10348024B2 ## CPC - H01R 13/44: Means for preventing access to live contacts {(making use of a switch actuated by engagement of counterpart H01R13/7036)} - H01R 13/6205: {Two-part coupling devices held in engagement by a magnet} - H01F 7/02: Permanent magnets {[PM]} - H01R: ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES ## Abstract The invention relates to an electrical plug and socket assembly comprising: a base including at least two first electrical contacts and a first magnetic portion arranged so as to move by magnetic attraction to move the first two electrical contacts toward the outside of the base; a plug comprising two second electrical contacts intended to electrically connect to the first two electrical contacts when same are outside the base and a second magnetic portion to move, by magnetic attraction, the first magnetic portion to drive the first electrical contacts toward the outside of the base; the first magnetic portion or the second magnetic portion comprises at least one permanent magnet such as to form a magnetic circuit when the plug is brought near the base. ## Claims ### Claim 1 An apparatus comprising an electrical connector assembly, the electrical connector assembly comprising a socket and a plug, wherein the socket comprises at least one first electrical contact and a first magnetic part integral in motion with the first electrical contact, the first magnetic part being arranged to move by magnetic effect between first and second positions, wherein, in the first position, the first electrical contact is retracted inside the socket and wherein in the second position the first electrical contact is outside the socket, wherein the plug fits into the socket and includes at least one second electrical contact that connects electrically to the first electrical contact when the latter is outside the socket and a second magnetic part arranged opposite the first magnetic part when the plug is fitted on the socket so as to displace, by magnetic effect, the first magnetic part toward its second position, driving the first electrical contact outward from the socket, wherein one of the first and second magnetic parts comprises at least one permanent magnet in such a way as to form a magnetic circuit when the plug is brought closer to the socket, wherein the first magnetic part comprises a first air-gap surface and a second air-gap surface and a first ferromagnetic piece fixed on the one hand on a surface opposite to its first air-gap surface and on the other hand on a surface opposite to its second air-gap surface, wherein the second magnetic part comprises a first air-gap surface intended to be opposite the first air-gap surface of the first magnetic part so as to form a first air-gap, a second air-gap surface intended to be opposite the second air-gap surface of the first magnetic part so as to form a second air-gap when the plug is brought closer to the socket and a second ferromagnetic piece fixed on the one hand on a surface opposite to its first air-gap surface and on the other hand on a surface opposite to its second air-gap surface, wherein the magnetic circuit is formed between the first magnetic part and the second magnetic part so as to generate a magnetic flux that passes through the first air gap in a first direction and that passes through the second air gap in a second direction that is opposite said first direction. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the first ferromagnetic piece has a loop-shaped architecture arranged parallel to the junction plane and wherein the second ferromagnetic piece has an architecture identical to that of the first ferromagnetic piece. ### Claim 3 (depends on 1) The apparatus of claim one of claim 1, wherein the plug further comprises a casing and wherein the second magnetic part is arranged to rotate freely inside the casing. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the first and second magnetic parts are arranged such that the magnetic circuit generates a magnetic flux surrounding the first electrical contacts and the second electrical contacts. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein the first ferromagnetic piece is annular and arranged parallel to the junction plane and wherein the second ferromagnetic piece is annular and arranged parallel to the junction plane. ### Claim 6 (depends on 5) The apparatus of claim 5, wherein the permanent magnet is fixed on a first annular portion of the second ferromagnetic piece and forms the first air-gap surface of the second magnetic part. ### Claim 7 (depends on 6) The apparatus of claim 6, further comprising first, second, and third elements, all of which are made of ferromagnetic material, wherein the first element is fixed on a second annular portion symmetrically with the permanent magnet in such a way as to form the second air-gap surface of the second magnetic part and wherein the second and third elements are fixed symmetrically on two annular portions of the first ferromagnetic piece to form the first air-gap surface and the second air-gap surface of the first magnetic part. ### Claim 8 (depends on 6) The apparatus of claim 6, further comprising a permanent magnet and first and second elements made of ferromagnetic material, wherein the permanent magnet is fixed on a second annular portion of the second ferromagnetic piece and forms the second air-gap surface of the second magnetic part, and wherein the first and second elements are fixed symmetrically on two annular portions of the first ferromagnetic piece to form the first air-gap surface and the second air-gap surface of the first magnetic part. ### Claim 9 (depends on 6) The apparatus of claim 6, further comprising first, second, and third permanent magnets, wherein the first permanent magnet is fixed on a second annular portion of the second ferromagnetic piece and forms the second air-gap surface of the second magnetic part, and wherein the second and third permanent magnets are fixed symmetrically on two annular portions of the first ferromagnetic piece to form the first air-gap surface and the second air-gap surface of the first magnetic part. ### Claim 10 (depends on 6) The apparatus of claim 6, further comprising a permanent magnet and first and second elements made of ferromagnetic material, wherein the first element is fixed on a second annular portion symmetrically with the permanent magnet, in such a way as to form the second air-gap surface of the second magnetic part, wherein the permanent magnet is fixed on a first annular portion of the first ferromagnetic piece forming the first air-gap surface of the first magnetic part, and wherein the second element is fixed on a second annular portion of the first ferromagnetic piece, symmetrically with the permanent magnet, in such a way as to form the second air-gap surface of the first magnetic part. ### Claim 11 (depends on 5) The apparatus of claim 5, wherein the permanent magnet is fixed on a first annular portion of the first ferromagnetic piece to form the first air-gap surface of the first magnetic part. ### Claim 12 (depends on 11) The apparatus of claim 11, further comprising first, second, and third elements made of ferromagnetic material, wherein the first element is fixed on a second annular portion of the first ferromagnetic piece, symmetrically with the permanent magnet, in such a way as to form the second air-gap surface of the first magnetic part and wherein the second and third elements are fixed symmetrically on two annular portions of the second ferromagnetic piece, forming the first air-gap surface and the second air-gap surface of the second magnetic part. ### Claim 13 (depends on 11) The apparatus of claim 11, further comprising a permanent magnet and first and second elements made of ferromagnetic material, wherein the permanent magnet is fixed on a second annular portion of the first ferromagnetic piece to form the second air-gap surface of the first magnetic part and wherein the first and second elements are fixed symmetrically on two annular portions of the second ferromagnetic piece to form the first air-gap surface and the second air-gap surface of the second magnetic part. ### Claim 14 (depends on 11) The apparatus of claim 11, further comprising first, second, and third permanent magnets, wherein the first permanent magnet is on a second annular portion of the first ferromagnetic piece to form the second air-gap surface of the first magnetic part and wherein the second and third permanent magnets are fixed symmetrically on two annular portions of the second ferromagnetic piece thus forming the first air-gap surface and the second air-gap surface of the second magnetic part.