Abstract: An electric receptacle for trade size outlet boxes having a ground fault circuit interrupting mechanism incorporated therein. A receptacle housing includes contact jaws seated therein to receive the plug of a conductor leading to a load, electronic components to detect a ground fault and grounded neutral condition on the load side of the receptacle, plus a coil and trip mechanism to open the receptacle circuit on occurrence of a ground fault or grounded neutral condition. The complete receptacle assembly is approximately the same depth as conventional household receptacles which do not have ground fault circuit interrupting means included therein. Means to periodically test the ground fault interrupting mechanism is also included in the receptacle assembly, as well as means to indicate the circuit has been interrupted and means to reset.

Abstract: A material for use in making electrical contacts is produced in a powder form suitable for later processing into electrical contacts by standard metallurgical techniques generally involving compacting, sintering, and forming or cutting to make the desired contact size and shape. The material, and in most general applications the contact made from the material, essentially consists of silver, approximately 15% cadmium oxide by weight, and lithium oxide at a proportion of about .005 weight percent of lithium, which is approximately equal to .04 molecular percent of lithium oxide. The lithium oxide is added and uniformly distributed on the surfaces of the powder particles by precipitation.

Abstract: An industrial solid state logic system having a device for translating low level input signals into high level output signals, the components of the device being arranged so that an output switching unit responds only to current flowing from a source when fed from a logic gate which is adapted to sink current although it has the capability to source current. A light emitting diode is connected in a circuit of the device to indicate the electrical condition of an output switching component of the device.

Abstract: A captive fastener assembly, comprising a guide rail structure, a screw mounted thereon for linear movement relative to the guide rail structure but restrained from rotational movement, and a captive nut mounted in a cooperative bracket for rotational movement but restrained from linear movement relative to the bracket. The invention is particularly useful in fastening various work pieces together, such as an electric terminal box and a meter cabinet, the guide rail structure being mounted on one of the work pieces with the screw captively in place and the bracket secured to the other work piece with the nut captively mounted therein.

Abstract: An auxiliary gutter to receive, secure and house cable for connecting to an adjacent load center. The end walls of the gutter have a recessed edge region or notch intermediately thereof with cooperating clamp means to lay-in and secure lengths of cable without cutting. Wiring cable may thus extend unbroken in one continuous run from the top floor of a building to the bottom and connect to load centers on each floor by laying in cable and clamping to respective auxiliary gutters mounted along side each load center. Tap kits connect the cable electrically to the load centers. A cover is provided which has universal features, including a break-away tab and uniquely positioned mounting holes, making the cover useable with installations where the load center is the same length as the auxiliary gutter, where the load center is shorter than the auxiliary gutter, where both are flush mounted, and where both are surface mounted.

Abstract: The transformer, in particular a potential transformer, comprises a generally planar bushing insulator, dimensioned for a liquid or gaseous insulating medium and coaxially enclosing a high-voltage connector, and a flange section enclosing the bushing insulator. The bushing insulator is also enclosed by an intermediate flange filled with a liquid or gaseous insulating medium. One end of the intermediate flange is connected to the instrument transformer and the other end of the intermediate flange is connected to a self-contained high-voltage bushing. A high-voltage connector of the transformer is connected to a conductor of the high-voltage bushing in the space enclosed by the intermediate flange.