Abstract: A shielding device for protecting a T-type BNC connector against static electricity and magnetic fields, comprised of a four-way shielding tube formed by connecting two opposing halves together through a sealing process and covered around the T-shaped shell and two transversely disposed opposite BNC jacks of the T-type BNC connector, and a tubular insulative shield covered around the vertically disposed BNC plug of the T-type BNC connector, the four-way shielding tube having a blocking plate blocked on the T-shaped shell of the T-type BNC connector at the bottom and an earth terminal fastened in a hole on the blocking plate.

Abstract: A resistor coupled T-type BNC connector includes a ceramic resistor having a top end connected to two contact legs of a spring plate through a flat conductor, which spring plate being retained inside two transverse coupling portions by two end-matched sockets and connected to an electric terminal in a vertical coupling portion, and a bottom end connected to the outer shell of the T-type BNC connector. Fastening a BNC connector to either transverse coupling portion of the T-type BNC connector causes one contact leg of the spring plate lifted from the flat conductor for permitting the ceramic resistor to eliminate outside noises transmitted through the other transverse coupling portion.

Abstract: A cable assembly comprised of a connector assembly having a male D-miniature connector, an output adapter having two female D-miniature connectors, and a coaxial cable connected between said connector assembly and said output adapter to electrically connect said female D-miniature connectors to said male D-miniature connector.

Abstract: A capacitive coupled BNC type connector comprised of an insulative body, a shell inserted in said insulative body at one end for holding an electrical terminal and a ground terminal, and a conductive spring plate mounted on said insulator body, wherein said insulative body has a rectangular recess on an outer wall thereof at a location corresponding to a rectangular contact surface on said shell, said rectangular recess comprising an intermediate through hole for holding two capacitor elements, and two opposite bolt holes; said conductive spring plate has two opposed projecting strips transversely disposed at two opposite ends, and a rectangular board vertically disposed at one side between said two projecting strips, said rectangular board having two round holes respectively connected to said two bolt holes by screws permitting said capacitor elements to be firmly connected between said rectangular board of said conductive spring plate and said rectangular contact surface of said shell.

Abstract: A coaxial active tap device comprising an upper fitting plate connected to a bottom fitting plate in holding a coaxial cable to be connected, an insulative casing attached to said bottom fitting plate in holding a signal terminal, two earth terminals inserted in two recessed holes on the bottom edge of said upper fitting plate and automatically pierced through the insulator in connecting the braided outer conductor said said coaxial cable, and earth element attached to said insulative casing on the inside and incorporated with said earth terminals into an earth circuit in connecting said braided outer conductor of said coaxial cable to the earth circuit of the series-parallel transition device to be connected.

Abstract: A T-type coaxial cable adapter comprising an upper cover, a bottom cover, a BNC casing and a terminal, wherein said upper and bottom cover are connected together by screws, defining therein a coaxial cable mounting hole and a BNC casing mounting hole at right angles to each other; said terminal is comprised of a metal core covered with an outer insulator and firmly fastened in said BNC casing. Cutter means is fastened in the coaxial cable mounting hole to connect the braid shield of the coaxial cable that is fastened therein to an BNC connector which is connected to the BNC casing while the arrow-headed front end of the metal core of the terminal is inserted through the jacket of the coaxial cable to electrically connect the conductor thereof.

Abstract: A multiple connector comprising a cast iron pipe having terminals disposed in first and second outlets arranged in parallel at one side thereof and a third outlet arranged on an opposite side of the cast iron pipe. The terminals respectively connected through screw joints for connecting multiple telecommunication circuits in parallel.

Abstract: Disclosed is a passive electric connector, which comprises a BNC (Bayonet Navy Connector) socket holder, a BNC terminal plug and a chain connected therebetween. The BNC socket holder includes two opposite shells made of regular channel plate covered with a layer of soft plastic material and respectively connected together to form a closed housing for mounting four BNC sockets. There are provided four resistors each having one end respectively connected to the BNC sockets inside the housing and an opposite end respectively connected together. The housing is stuffed with a non-conductive packing material which covers the resistors and some parts of the BNC sockets and portion of a chain which extends inside the housing.

Abstract: A passive electric connector with BNC terminal plug, which includes a metal casing releasably covered with a metal cover board with a BNC terminal plug connected thereto by a chain. The metal casing is integrally formed with four BNC sockets through casting process, which BNC sockets are partly projecting out of the metal casing and have each a center shaft extending inside the metal casing with a resistor respectively secured thereto. The resistors which have each an one respectively connected to the center shafts of the four BNC sockets are respectively connected together. The BNC terminal plug has an internal cylindrical cap and an external insulator cap to effectively protect against radio frequency interference and electrical magnetic interference. A marking is made on the external insulator cap for identification of a pull-down resistor received inside the BNC terminal plug.