Patent attributes
A serially-connectable device includes a plug, an electrical cable, and a joining sleeve. The plug includes an insert portion and apertures are arranged in parallel to each other and formed through the insert portion. The electrical cable includes metal wires, such as wires of a light string. Ends of the wires respectively run through the apertures, and are folded back onto a surface of the insert portion to form exposed wire portions servicing as terminal pins. The joining sleeve includes two insert holes. Electrical conductors are disposed within the joining sleeve. Each electrical conductor extends from one of the two insert holes to the other insert hole. The insert portion is inserted into one of the two insert holes, to have the pins respectively contact the electrical conductors. Through the combination of the joining sleeve and the plug, two electrical cables can be quickly connected in a serial manner.