Abstract: A multipurpose electric adapter is disclosed to include a housing holding two main metal power lead frames and a main metal grounding lead frame near a bottom side and two supplementary power lead frames and a supplementary grounding lead frame respectively connected to the main metal power and grounding lead frames at the top, a back plate fastened to the back side of the housing with the power and grounding prongs disposed in contact with the main metal power and grounding lead frames and extended out of the housing for connection to an electric outlet, and a faceplate covered on the front side of the housing, the faceplate having plug terminal insertion holes corresponding to the main metal power and grounding lead frames and the supplementary metal power and grounding lead frames for receiving any of a variety of electric plugs used in different countries around the world.

Abstract: A multi-voltage multi-pole safety electric adapter is constructed to include a socket unit, the socket unit having a first set of plug holes for receiving a low voltage plug and a second set of plug holes for receiving a high voltage plug, and a first set of metal contacts and a second set of metal contacts respectively disposed at a back side wall thereof, a low voltage plug unit and a high voltage plug unit alternatively fastened to the back side wall of the socket unit for receiving a low voltage power supply from or high voltage power supply from an electric outlet, the low voltage plug unit having a set of metal contacts corresponding to the first set of metal contacts at the socket unit, the high voltage plug unit comprising a set of metal contacts corresponding to the second set of metal contacts at the socket unit, and a transformer installed in the socket unit for converting low voltage input power supply or high voltage input power supply into the desired power level.

Abstract: A universal electric adapter includes a casing injection-molded from plastics, the casing having a front face panel, two lateral receiving chambers, a middle receiving chamber, a locating groove inside the middle receiving chamber, a plurality of coupling flanges radially inwardly disposed around a rear open side thereof, a positioning projection radially inwardly suspended in the rear open side, and two locating grooves bilaterally disposed at the periphery thereof; two metal contact frames respectively installed in the lateral receiving chambers the metal contact frames each having a protruded contact strip; a grounding frame installed in the middle receiving chamber, the grounding frame having a contact base, and a locating flange fastened to the locating groove inside the middle receiving chamber; a plug member fastened to the rear open side of the casing, the plug member having a plurality of metal prongs adapted for fastening to an electric socket, a plurality of coupling grooves spaced around the perip

Abstract: A combination electric connector includes a socket unit and a plug unit, the socket unit having a set of plug blade receiving holes extended through a front side thereof for receiving the metal blades of an electric plug, two grounding prong receiving portions disposed at two opposite lateral sides thereof for receiving the grounding prong or grounding wire of an electric plug, a substantially U-shaped grounding metal plate installed in the grounding prong receiving portions and extended over a rear side thereof, two metal contact plates respectively mounted in the plug blade receiving holes and extended out of the rear side, the plug unit having a plurality of hooks and coupling flanges respectively fastened to the rear side of the socket unit, and a set of metal rod members respectively disposed in contact with the metal contact plates for connection to an electric socket.

Abstract: An electric combination socket, which includes a socket body having a face panel, an upper round ground slot provided at the face panel on the middle at a top side, flat hot and neutral slots arranged in parallel at the face panel below the upper round ground slot for matching with the upper round ground slot to receive an electric plug from an electric home appliance, a flat ground slot provided at the face panel between the hot and neutral slots for matching with the hot and neutral slots to receive a computer power plug, and a coupling groove provided at the face panel around the hot and neutral slots and the flat ground slot for receiving the shell of a computer power plug, a ground terminal mounted in the flat ground slot, hot and neutral terminals respectively mounted in the hot and neutral slots, and a ground frame at a rear side of the socket body remote from the face panel, the ground frame comprising a top contact portion inserted into the upper round ground slot at the socket body, and a bridge por

Abstract: An electric outlet includes a socket holder formed of a bottom shell and a top cover shell, a plurality of metal terminal holders respectively installed in the socket holder for connection to power supply, and a plurality of sockets respectively installed in respective socket receiving holes on the top cover shell of the socket holder, each socket including a socket body, the socket body having a top face panel for receiving an electric plug, spring hooks for positioning in one socket receiving hole on the top cover shell, and three bottom through holes, a positive terminal metal contact plate and a negative terminal metal contact plate and a grounding metal contact plate respectively mounted inside the socket body and aimed at respective plug insertion slots on the face panel, a plurality of metal frames mounted inside the socket body and respectively connected to the positive and negative terminal metal contact plates and the grounding metal contact plate, the metal frames each having a horizontal wire hole

Abstract: A left/right turn, failure/overtaking vehicle signal light control system, which includes a holder frame, an actuating device pivoted to the holder frame and driven by a lever, two signal lights, first switch means controlled by the actuating device to flash one of the signal lights for left or right turn indication, second switch means controlled to flash the signal lights for failure/overtaking indication, and third switch means connected between the second switch means and the signal lights, wherein the actuating device is moved between a first position where the actuating device is maintained in contact with the third switch means, enabling the signal lights to be flashed for failure/overtaking indication when the second switch means is witched on, and a second position where the actuating device is disconnected from the third switch means, and the first switch means is driven by the actuating device to flash one of the signal lights for left or right turn indication.

Abstract: A universal, voltage variable, safety enhanced electric connector system is provided. Each connector in the system includes a housing, an electric plug and receptacle disposed at opposite side walls of the housing, and power supply circuit means disposed within the housing and connected between the electric plug and receptacle. The power supply circuit means includes a voltage transformer for converting an input power supply voltage into high and low voltage AC power supplies. It also includes the rectifier for converting AC power supply voltage into DC power supply voltage, as well as an AC voltage regulator, a DC voltage regulator and a DC output jack coupled to the rectifier. At least one insertion slot corresponding to one of the transformer voltage outputs in formed on a left side wall of the housing with a pair of metal contact plates provided therein.

Abstract: A three-dimensional homologous surveying instrument includes a base with an outer spherical shell mounted thereon for receiving therein a ring-shaped shell holder, an intermediate spherical shell and an inner spherical shell with respective zero references at in a homologous relationship with each other. The inner spherical shell rotates within the intermediate spherical shell about X-axis. The intermediate spherical shell rotates within the ring-shaped shell holder about Y-axis. The outer spherical shell is positioned in the base to serve as the X-axis. The inner spherical shell and the intermediate spherical shell each have a pendulum at the bottom. The outer spherical shell, the ring-shaped shell holder, the inner spherical shell and the intermediate spherical shell form a gyroscopic device for three dimensional surveying through X-axis, Y-axis and Z-axis concomitantly. The pendulum of the inner spherical shell is mounted with a compass for indicating the direction of the angle of slope being surveyed.

Abstract: A universal electric socket includes an insulative bottom shell having a pair of spaced ribs defining three separated chambers and three downwardly extending protruding portions below the chambers. An insulative cover shell covers the bottom shell so that the chambers are electrically insulated from one another. The cover may include ribs that interfit with the ribs of the bottom shell's ribs to isolate contacts disposed in the chambers. A grounding contact plate and two blade contact plates are respectively mounted in the chambers of the bottom shell. The grounding contact plate and the blade contact plates each have a plurality of receiving portions for receiving the grounding prong or blades of any of a variety of electric plugs. The blade contact plates each have a receiving portion and a wire clamp fastened to the receiving portion for holding the hot or neutral wire.

Abstract: An electric plug plate having two symmetrical power blade mounting zones and a grounding prong mounting zone between the power blade mounting zones, a plurality of power blade mounting holes and grounding prong mounting holes respectively disposed at the power blade mounting zones and grounding prong mounting zone, two first metal mounting plates and a second metal mounting plate respectively mounted in respective back recesses thereof and having threaded power blade mounting holes or grounding prong mounting holes corresponding to the power blade mounting holes and grounding prong mounting holes at the power blade mounting zones and grounding prong mounting zone for mounting a pair of metal contact blades and a grounding prong subject to one of a variety of electric plug specifications.

Abstract: A safety electric socket adapter includes a body having two longitudinal front sliding tracks and two longitudinal rear sliding tracks at two opposite sides, a first metal rack and two second metal racks respectively mounted in the body for receiving the grounding prong and metal blades of one of a set of electric plugs, a face panel and a back board respectively detachably fastened to front and rear sides of the body, the face panel and the back board each having two longitudinal side flanges respectively inserted into the front sliding tracks and rear sliding tracks of the body, the face panel having a grounding plug hole and two power plug holes for receiving the grounding prong and metal blades of one of a set of electric plugs of different specifications and spring-supported gate means forced by respective spring means to automatically close the power plug holes, a first metal plate and two second metal plates respectively mounted in the body and connected to the first metal rack and the second metal rac

Abstract: An electrical adapter having a face panel with different blade and grounding prong insertion holes for receiving different electrical plugs, a track at its back side adapted to receive one of a set of plug members, a plug unit and a socket unit arranged at two opposite lateral sides so that a plurality of electrical adapters can be connected in series by plugging the plug unit of one electrical adapter into the socket unit of another, and an electrical circuit consisting of a voltage regulator, a voltmeter, a voltage stabilizer, a power switch and a surge absorber.

Abstract: A safety socket and plug arrangement in which the socket has a spring-supported safety baffle plate blocking in the plug blade insertion slots, the safety baffle plate being moved out of the plug blade insertion slots when the metal contact blades of an electric plug are inserted into the plug blade insertion slots, or tilted and stopped in place when a child inserts a rod member into one plug blade insertion slot; the plug includes a plug shell and a replaceable plug head detachably coupled to the plug shell for connection to an electric socket.

Abstract: A switch mount adapted for the mounting of switches, including a rectangular opening having two long sides and two short sides, a plurality of retainer members and a plurality of spring members alternatively arranged along one long side of the rectangular opening, a plurality of retaining notches and a plurality of retaining flanges alternatively arranged along the opposite long side of the rectangular opening symmetrical to the retainer members and the spring members, each of the retainer members having two lateral clamping walls at two opposite lateral sides, each of the spring members having a head, two shoulders at two opposite lateral sides, and an inwardly downward bottom slope, and a plurality of block respectively disposed in the retaining notch, and two recessed planes at the two opposite short sides, each of the recessed planes having at least one mounting hole for mounting.

Abstract: A 125 V/250 V safety electric socket device, including a socket body having a set of L pole contact metal plates and a set of N pole contact metal plates respectively connected to 125 V and 250 V power sources, a non-fuse circuit breaker contact metal rod, L-shaped rails defining a crossed sliding way; a cover panel covered on the socket body, having a rectangular center opening, two guide slots respectively extended from the center opening leftward and downwards, and a circuit breaker slot, which receives the non-fuse circuit breaker contact metal rod; a slide moved in the crossed sliding way and marked with a 125 V directional arrow and a 250 V directional arrow, and having two sets of bottom contacts for connection to 125 V and 250 V power sources respectively; a first plug panel and a second plug panel respectively detachably connected to the slide at right angles; wherein when the slide is moved in the direction of the 250 V directional arrow, one set of bottom contacts of the slide are respectively elec

Abstract: A three-dimensional homologous surveying instrument includes a base with a spherical cover mounted thereon for receiving therein a shell holder, an intermediate spherical shell and an inner spherical shell with respective zero references set in a homologous relationship with each other. The inner spherical shell rotates within the intermediate spherical shell on a first axis serving as a dynamic X-axis. The intermediate spherical shell rotates in the shell holder on a second axis perpendicularly intersecting the first axis and thus serves as a dynamic Y-axis. The cover is positioned in the base to serve as the Z-axis. Longitudinal and latitudinal scaling on the cover matches longitudinal and latitudinal scaling on the intermediate and inner shells, resulting in a three-dimensional, completely homologous surveying instrument.

Abstract: A multipurpose safety receptacle for alternative connection thereto of a variety of plug pins, which includes a bottom block comprising two receiving troughs at both lateral sides for receiving two conductive frames respectively, a ground connection trough in the middle for receiving a ground connection frame, a division plate mounted on the bottom block to enclose the conductive frames and the ground connection frame, and an upper cover covering over the division plate and fixedly connected with the bottom block by means of heat sealing process to form a receptacle assembly for further connection to a frame panel which frame panel is comprising retainer means and stop members to firmly hold up the receptacle assembly when the receptacle assembly is mounted thereon.