Abstract: A voltage tracking circuit is provided. The voltage tracking circuit includes first and second P-type transistors and a control circuit. The drain of the first P-type transistor is coupled to a first voltage terminal. The gate and the drain of the second P-type transistor are respectively coupled to the first voltage terminal and a second voltage terminal. The control circuit is coupled to the first and second voltage terminals and generates a control voltage according to the first voltage and the second voltage. The sources of the first and second P-type transistors are coupled to an output terminal of the voltage tracking circuit, and the output voltage is generated at the output terminal. In response to the second voltage being higher than the first voltage, the control circuit generates the control signal to turn off the first P-type transistor.

Abstract: A cable connector disposed at a cable includes a signal protection device, an outer pipe and a transmission member. The signal protection device includes an inner pipe and a signal protection module. The inner pipe is inserted into the outer pipe through an end opening thereof such that a metallic conducting rod of the inner pipe is in the outer pipe. The signal protection module is inserted through another end opening of the outer pipe such that the metallic conducting rod of the inner pipe is penetratingly disposed at the signal protection module. The transmission member is inserted through another end opening of the outer pipe such that a conducting element is electrically connected to the metallic conducting rod of the inner pipe, revealing a transmission element. Therefore, the signal protection device is modularized and miniaturized.

Abstract: A cable connector disposed at a cable includes a signal protection device, an outer pipe and a transmission member. The signal protection device includes an inner pipe and a signal protection module. The inner pipe is inserted into the outer pipe through an end opening thereof such that a metallic conducting rod of the inner pipe is in the outer pipe. The signal protection module is inserted through another end opening of the outer pipe such that the metallic conducting rod of the inner pipe is penetratingly disposed at the signal protection module. The transmission member is inserted through another end opening of the outer pipe such that a conducting element is electrically connected to the metallic conducting rod of the inner pipe, revealing a transmission element. Therefore, the signal protection device is modularized and miniaturized.

Abstract: A cable connector capable of prohibiting the cable from rotation, comprising: a tubular casing having a coupling portion at one end and a tapered abutment portion disposed at the other end and a plurality of toothed portions spaced around the inside wall near the tapered abutment portion, a locknut rotatably coupled to the coupling portion of the tubular casing, a inner tube inserted into the locknut and the tubular casing, and a collar, which has a clamping portion at one end and attached to the tapered abutment portion of the tubular casing, a receiving portion at the other end for the insertion of a cable into the collar and the casing and the inner tube, and a tapered surface portion gradually reducing from the clamping portion toward the receiving portion for allowing the collar to be forced onto the tubular casing by an external push force to compress the tubular casing radially inwards toward the inner tube, thereby securing firmly the inserted cable to the inner tube and the tubular casing.

Abstract: A cable connector includes a tubular casing, which has an axial through hole axially extending through two ends thereof and a neck axially forwardly extending from one end, a locknut, which has an inner thread for fastening to an external device and a coupling hole disposed at one end and coupled to the neck of the tubular casing and having an inner diameter smaller than the inner diameter of the locknut and approximately equal to the outer diameter of the neck, an inner tube, which has an axial through hole extending through two distal ends thereof, a stop flange extended around the periphery of one end thereof and stopped against the neck of the tubular casing, and a stretching portion formed on the periphery thereof adjacent to the stop flange and stopped against the inside wall of the neck of the tubular casing to force the neck into friction engagement with the inside wall of the locknut, and a collar, which is coupled to one end of the tubular casing and forcible onto the tubular casing toward the other

Abstract: A soldering method is designed to seal an on-line transfer device of cable such that a housing of the device is sealed off to prevent the electromagnetic interference. The method includes a first step in which a fusing portion between a receiving seat and a cover of the housing is furnished with a soft solder. The cover is heated to cause the soft solder to melt to flow into the fusion portion, so as to fuse the receiving seat and the cover together. The housing of the device is free of the soldering marks or lumps.

Abstract: A soldering method is designed to seal an on-line transfer device of cable such that a housing of the device is sealed off to prevent the electromagnetic interference. The method includes a first step in which a fusing portion between a receiving seat and a cover of the housing is furnished with a soft solder. The cover is heated to cause the soft solder to melt to flow into the fusion portion, so as to fuse the receiving seat and the cover together. The housing of the device is free of the soldering marks or lumps.