Abstract: This invention relates to a pipe connector comprising: a main connecting pipe formed with an inverted conical surface at the upper edge, a threaded portion at the upper side, and a raised annular portion below the threaded portion; a leak-proof gasket mounted in the inner side of the raised annular portion of the main connecting pipe; a locking nut provided with internal threads and a stop edge having a conical surface opposite to the inverted conical surface of the main connecting pipe; a split ring disposed between the locking nut and the inverted conical surface of the main connecting pipe; and a connecting pipe inserted into the main connecting pipe through the locking nut; whereby two pipes can be easily connected together and no fluid can leak out thereof.

Abstract: This invention relates to a safety electrical receptacle and in particular to one including a lower casing, an upper casing engaged with the lower casing having two slots for receiving two prongs of a plug, a sealing mechanism mounted within the upper casing and including two stoppers, a retractable frame on which are mounted the two stoppers, and two springs, each of the two stoppers being urged by a corresponding one of the two springs to go inwards thereby sealing the slots of the upper casing, the stoppers being engaged with the retractable frame so that the retractable frame will be retracted inwards when the stoppers are urged to go inwards, and a positioning member fitted on the retractable frame and the stoppers for enabling the retractable frame and the stoppers to move horizontally only, whereby the receptacle may prevent the children from getting an electric shock accidentally.

Abstract: This invention relates to an electrical plug and receptacle assembly and in particular to one including a housing divided into two separate chambers each having a slot, a pair of conducting clamps each fixedly mounted in one of the chambers of the housing and normally kept at a constant distance from the main conducting plates, a pair of main conducting plates each pivotally mounted in one of the chambers of the housing in such a way that each of the main conducting plates will contact a corresponding one of the conducting clamps when forced to turn outwardly, a pair of insulators each fixedly connected with an end of one of the conducting plates and just disposed against the slot of the housing, a pair of resilient members each urging one of the conducting plates inwardly against the central portion of the housing, a plug body having two blades, and a U-shaped sleeve with two prongs each having a longitudinal hole through which a corresponding one of the two blades of the plug body extends partially out of t