Multipolar connector for telephone sets

Claim 2

A plug and socket connector for an electric circuit, said socket comprising a case having a removable cover enclosing a central cavity, a plurality of pairs of mutually insulated leaf contact springs within said cavity, an end wall in said socket, openings in said end wall providing access to said cavity, each of said pairs of springs bordering an opening in said end wall; said plug comprising a case having a removable cover and an end wall, a plurality of pairs of blades projecting through the end wall of said plug, each said pair of blades being separated by a strip of insulating material having the shape of an arrow, said strip including a separating body portion and a head portion at the projecting end, said head portion including tapered edges extending laterally beyond the lateral extent of the plug blades to protect said blades on entry into said socket, an alignment lug projecting from the blade plug end of the case, said lug being constructed to slide into an opening of cooperating shape in the end wall of said socket, means for securing said lug in said opening of cooperating shape and for preventing thereby the accidental dislocation of the connector, the cover for the plug having a lip overhang for covering the intersection of the socket and plug when the connector is assembled, thereby protecting the connector from entry of foreign particles, and said socket further including a plate on the backside thereof, extending beyond the end wall of the socket to provide a backing for said plug when the latter is engaged with said socket, the back plate providing a protective guard for the surface to which the connector is mounted from marring etc. upon assembly and disassembly of the connector.

Claim 3

A plug and socket connector for an electric circuit, said socket comprising a case having a removable cover enclosing a central cavity, and plug-entrances thereto at one end, a plurality of pairs of leaf contact springs within said cavity with one spring of each pair having one end part offset from the main body thereof, said offset part having an inset flange with a hole therein, the other spring of each pair having a flange on one end with a hole therein, the length of both said springs from the offset part of said one spring and the flange of said other spring being substantially the same, the springs of each pair being secured by screws positioned in tandem and separated by a partition, said plug comprising an open top case having a removable cover and having a plurality of pairs of blades projecting through the other end, each said pair of blades being separated by a strip of insulating material, said insulating strip including a divider portion separating said blades and a lead end portion, said lead end portion configured into the shape of an arrowhead extending beyond and covering said blades and extending laterally beyond the lateral extent of said blades to protect said blades from separation during insertion of said plug, the cover for the plug having a lip overhang for covering the intersection of the socket and plug when the connector is assembled, thereby protecting the connector from entry of foreign particles, and said socket further including a plate on the backside thereof, extending beyond the end wall of the socket to provide a backing for said plug when the latter is engaged with said socket, the back plate providing a protective guard for the surface to which the connector is mounted from marring etc. upon assembly and disassembly of the connector.

Claim 4

A plug and socket connector for an electric circuit, said socket comprising a case having a removable cover enclosing a central cavity, and plug-entrances thereto at one end, a plurality of pairs of leaf contact springs within said cavity with one spring of each pair having one end part offset from the main body thereof, said offset part having an inset flange with a hole therein, the other spring of each pair having a flange on one end with a hole therein, the length of both said springs from the offset part of said one spring and the flange of said other spring being substantially the same, the springs of each pair being secured by screws positioned in tandem and separated by a partition, said plug comprising an open top case having a removable cover and having a plurality of pairs of blades projecting through the other end, each said pair of blades being separated by a strip of insulating material, said insulating strip including a divider portion separating said blades and a lead end portion, said lead end portion configured into the shape of an arrowhead extending beyond and covering said blades and extending laterally beyond the lateral extent of said blades to protect said blades from separation during insertion of said plug, the cover for the plug having a lip overhang for covering the intersection of the socket and plug when the connector is assembled, thereby protecting the connector from entry of foreign particles, and said socket further including a plate on the backside thereof, extending beyond the end wall of the socket to provide a backing for said plug when the latter is engaged with said socket, the back plate providing a protective guard for the surface to which the connector is mounted from marring etc. upon assembly and disassembly of the connector.