Abstract: A double-functioned hand-free device for cellular telephone comprises a microphone casing having one end connected with a neck hanger, wherein a direct sound-receiver circuit and a circuit for sensing vibration of vocal cords are housed in the microphone casing; and a slew cover on the microphone casing is provided for control and switch the circuits alternatively to meet on-the-spot requirements.

Abstract: A floor box partition panel made from a square plate and fastened in a square floor box for electric wiring, said floor box partition panel having a square hole at the center for fastening a plug switch, and projecting strips symmetrically projecting from the peripheral edge thereof in two opposite directions so that two separate spaces are defined inside said floor box for inserting high tension cables and low tension cables separately.

Abstract: An overhead conductor carrier, comprising a conductor carrying frame assembly which is comprised of two parallel rails with a plurality of adjustable crossed rods connected therebetween for carrying conductors, and a suspension gear to suspend said conductor carrying frame assembly from the ceiling of a factory building which is comprised of two adjustable lateral stays connected by a link block for bearing said conductor carrying frame assembly. The pitch between the two parallel rails can be adjusted by changing the contained angles of the adjustable crossed rods, according to the quantity of conductors to be carried. The two adjustable lateral stays can be set adjacent to or apart from each other so as to change the total width of the suspension gear according to the width between the two parallel rails.

Abstract: A floor junction box having a plurality of columns releasably set between the base and the cover plate thereof for controlling the size of the wiring holes therebetween so that conductors of different size and shape can be alternatively fastened therein for connecting a variety of wire conduits. Insert is provided to seal each wiring hole when no electric wire is to be inserted therein.

Abstract: A junction box which includes a case having fastened therein a plug socket mounting plate with a plurality of plug sockets respectively mounted thereon at three locations; a raised, frame-shaped block at the inside for mounting a rubber packing and a frame-shaped bevel flange; a cover plate pivoted to the frame-shaped bevel flange at the inside. The cover has a hand-hold portion at the top and defining therein a hole through which electric wires can be inserted to respectively connect to the plug sockets by an electric plug. A frame-shaped top insert may be attached to the casing and squeezed in between the rubber packing and the bevel flange, permitting the bevel flange to fit flush with a surrounding surface.

Abstract: An overhead conductor carrier, comprising a conductor carrying frame assembly for carrying conductors which comprises two rails connected by a plurality of extension links therebetween, and a suspension gear for suspending said conductor carrying frame assembly from the ceiling of a factory building which comprises a U-shaped cross bar secured to the ceiling and two suspension rods movably hanging on said U-shaped cross bar, and wherein said two rails can be bilaterally extended outwards to increase the holding space therebetween according to the quantity of conductors to be carried.

Abstract: A terminal assembly for a terminal outlet on an electric wire conduit, including a connector fastened in said terminal outlet for holding a nut in position, a socket member fastened in the nut through screw joint for holding a locating seat therein at the bottom to resiliently hold a plug socket holder by a spring. The plug socket holder is fixedly covered with a cover plate for holding an electric plug socket connected to external power supply by a cable through the electric wire conduit, which has spaced projecting strips respectively engaged with spaced projecting blocks around the inner wall of the socket member. Control of the cover plate permits the plug socket holder to be completely received inside the socket member when not in use, or extend out of the socket member for electric connection.

Abstract: Threadless floor electric wire junction box with embedded in the concrete floor for distribution of electric wire through a wiring conduit which has a bolt hole for guiding electric wire. The bolt hole is blocked with a plug assembly and sealed with a gasket ring. The plug assembly comprises at least a tubular plug having an inner thread for mounting a cap through screw joint and sealed with a gasket ring. The cap can be conveniently removed from the tubular plug so that electric wire can be guided out of the wiring conduit for installation of socket power. A screw power. A screw pipe coupling is attached to the plug assembly and sealed with a gasket ring for connecting two tubular plugs together so as to increase the height of the plug assembly.

Abstract: A floor electric wire junction case includes a bottom block covered with a cover plate defining a plurality of wiring passages therebetween for respectively receiving a plurality of junctions which can be respectively connected to wiring connecting tubes. Each wiring bracket has a circular hole at its top for mounting a wiring plug assembly. The wiring plug assembly includes a movable ring plate permitting horizontal positioning of the wiring plug assembly in the associated wiring bracket.