Abstract: An insulated clamp is provided for attachment to a cap or connector and for clamping a cable terminating in the cap or connector. The clamp includes an insulating lower cover for the cap or connector, a set of clamping cleats cooperating on ramps in the lower cover, and an insulating upper cover engaged with the lower cover by threads on confronting surfaces thereof. The lower cover has a generally tubular form and includes at its lower end an external hand gripping surface and internal means for attachment to and about the wire terminals of a cap or connector. The lower cover also has at its upper end a set of threads on an external surface and an internal set of ramps spaced radially around its inner periphery. The set of clamping cleats is mounted on a pliable band and the individual cleats have a double wedge form. The cleats are symetrically spaced around the band at stations matching the ramps of the lower cover.

Abstract: A kelly cock assembly adapted for connection within a tubular drill string above or below the kelly joint for controlling the flow of fluids through the drill string, wherein an electrical conductor means is provided for detachable interconnection with one or more electrical cables provided in the drill string for uninterrupted transportation of electrical energy between a location at the surface and a subsurface location without interferring with fluid flow control by the valve means of the assembly.

Abstract: A load break bushing assembly for high voltage electrical systems is disclosed. The bushing assembly is normally connected to a stationary object such as a transformer to dispose a female electrode receiving bore for reception of a terminator electrode. The bore has at its mouth end a protective, arc-snuffing tube of suitable arc suppressant material. The tube has radial openings in the bore leading to an annular chamber within the tube walls, the chamber exposing a large surface area to the ionized gases tending to quench the generated gas on load break and to break up the pressure wave which follows the withdrawal of the arc follower electrode. Various filter materials may be inserted in the chamber if desired to enhance its arc extinguishing characteristics.

Abstract: Most high speed centrifuges employ a relatively small diameter elongate flexible drive shaft, sometimes called a "quill" shaft. These relatively slender shafts are flexible to absorb vibration as the assembly passes through speeds of resonance and to permit re-alignment of the axis of rotation of the shaft and the rotor driven thereby in the event the center of mass of the rotor and shaft assembly is displaced from the nominal axis of the rotation. To use such an apparatus for testing electrical devices and components, electrical conductors for wires are passed from a slip ring assembly located at an end of the quill shaft remote from the rotor and longitudinally alongside the quill shaft to the electrical device mounted on the rotor.

Abstract: An electrical conduit grounding assembly includes a grounding cable parallel to and laterally offset from the conduit and a pair of longitudinally extending dihedral angle clamp members provided with longitudinally serrated confronting concave faces which embrace the conduit and have interdigitating hinge knuckles along their proximal longitudinal edges engaging the grounding cable. A screw engages a tapped bore and an opening in distal wings on the clamp members to permit their tightening. Longitudinal slots may be formed in the knuckles to facilitate their application to the grounding cable.

Abstract: An electrical conductor arrangement is provided for the conducting of electrical currents from a rotating shaft to a non-rotating conductor. The arrangement provides for an electrically conductive worm with helical grooves affixed to the shaft so as to rotate therewith and a flexuous electrical contactor disc, formed by a plurality of flexible electrically conductive fibers projecting radially from a central annular hub, which is rotatably mounted such that the fiber surfaces adjacent to the ends of the conductive fibers engage the walls of the helical grooves of the worm. As the shaft and worm rotate, successive ones of the electrically conductive fibers contact and move with the worm helix causing the flexuous electrical contactor disc to rotate at a reduced speed determined by the radius of the disc and the number of grooves of the worm helix.

Abstract: An electrical connector plug fitted with a flexible insulated wire ground lead that terminates in a prong of a size to fit the female grounding socket outlet. A separate attachable flexible wire is fitted at one end with a hollow tube of a size to fit over the prong of the plug ground lead, and is fitted at the other end with a connector shaped to fit about a grounding screw of a female outlet.

Abstract: An insulating cord grip capable of being locked and unlocked by hand includes two cylindrical sections each having a hand grip on its outer surface. A locking of one of the sections relative to the other is achieved through relative rotary motion about a common axis to move one section axially with respect to the other. The locking means include a locking thread on the inner surface of one section and one on the outer surface of the other section. The two sections cooperate as they are rotated relative to one another with an internal cable clamping member which member tends to urge the sections apart axially with increasing force as the axial approach of the two sections urges the clamp against a contained cable with increasing force.

Abstract: A post type electrical terminal having at one end at least one channel for receiving electrical wires. This channel follows a nonlinear path so as to impose a bend in any wire inserted therein.

Abstract: A connector plug with a permanently connected cable, provided with a housing consisting of two shells in which transverse partitions comprising cut-outs are provided for strain relief of the cable. The cable can be forced into these cut-outs which are staggered with respect to each other such that the cable is curved.

Abstract: A molded one-piece wall plug having a pair of electrical contacts and a ground contact extending from one flat face thereon. The body of the wall plug is approximately a right circular cylinder with the flat face forming one end of the cylinder. A strain-relief sleeve extends in a tangential direction from the periphery of the body and is spaced above the plane containing the flat face of the plug. A multi-conductor cable is led through the strain-relief sleeve into the interior of the plug body having separate conductors connected to each of the electrical contacts and the ground contact. The tangential direction of departure of the strain-relief sleeve from the periphery of the wall plug body is such as to lead the multi-conductor cable in a direction so that when the electrical contacts are inserted in an electrical wall receptacle the cable will not overly any other receptacle in a standard array of receptacles having two rows and at least one column of receptacles.

Abstract: An isobaric device housing rotating electrical contacts, including a wateight housing filled with an electrically insulating liquid at a pressure which is substantially the same as the pressure of the environment in which the device is to be used, and one or more rotating electrical contacts formed by concentric conductive collars located between pairs of insulating rings, which rings are separated and sealed by sealing joints of elastomeric material, the space defined between said rings, collars and sealing joints being filled with an electrically conductive liquid, and washers on each outer end of the contact structure limiting axial movement of the sealing joints which joints also transmit pressure. A plurality of such contact structures may be stacked together on a common shaft thereby forming a multi-contact device. A process for manufacturing such contacts is also disclosed.

Abstract: Connecting device, which may be used for the spring member of a flexible hose, comprises a web having parallel sidewalls extending therefrom. Wire-receiving slot means extend inwardly from the free edges of the sidewalls and contact portion extends forwardly from the web so that when a wire spring in a flexible hose is inserted into the slot, the connecting device will extend from the end of the hose and parallel to the axis thereof. The wire-receiving slot means has features which make it particularly suitable for spring steel wires.

Abstract: An electrical connector including selective polarization keying between the ground pin contact and ground socket contact. A rotatable sleeve around the ground socket contact selectively locks the ground pin contact in position or prevents insertion thereof when a circuit breaker is on.

Abstract: A technique is described for completely and positively wiring components into mass produced machines, such as washing machines, dryers and the like. The subject technique encompasses improved contacts, connectors and a wiring harness all of which are individually and collectively adopted to provide a readily ascertainable position visual indication of a full mating condition and which will prevent further assembly of components if not initially fully assembled in the proper relationship. Each subassembly of a connector and related component includes keying means allowing only correct assembly and mounting in the machine plus visual indicators which verify correct assembly at each step. The connectors preferably having housings which can be produced in great lengths and cut to the desired shorter lengths. These housings also include strain releif means for the associated conductors and may be hermaphroditic.

Abstract: A cradle type wire grounding lug is secured to the periphery of a conduit fitting such as a bushing. The lug has a body with a generally C-shaped cross section for the wire clamping portion and has a mounting tang extending outwardly and angularly offset from the base of the C-shaped portion with a mounting screw opening in the tang for securing it to the periphery of the bushing. A binding screw extends down through the top flange of the C-section generally transverse to the ground wire receiving groove along the bottom flange of the C-section, which has an opening concentric to the binding screw opening. The mounting tang is offset about 30.degree. from the plane which contains the base of the C-section.

Abstract: Apparatus for uniformly cooling an array of printed circuit boards mounted in a card holding means includes a high velocity centrifugal fan which is in communication with a plenum chamber secured to the lower end of the card holding means. Disposed in the plenum chamber is a perforated screen configured to include a series of crests and troughs which operate as baffle means for providing resistance to the flow of high velocity air from the blower. The screen causes turbulence which reduces the velocity and uniformly directs the airflow through openings in the plenum chamber to the spaces between the array of printed circuit boards. The airflow thus divided cools each card on both sides as the air flows from bottom to top, thereby displacing the warmer air heated by the components mounted on the printed circuit boards.

Abstract: An electric power coupler for use with first and second door members relatively movable along a predetermined path toward and away from substantial abutment has a first frame mounted on the first door member. An inner pair and an outer pair of first frame electrical connectors are mounted on the first frame in a recess therein having a lateral opening in the direction of the path. The first connectors have exposed surfaces parallel to the path. At least some of the connectors are resilient in a direction normal to the path. The second frame is mounted on the second door member and supports a plunger for movement in a direction normal to the path. The plunger is spring urged to project, and cam surfaces on the first frame and the second frame cause the plunger to retract. The plunger has opposite walls partly defining a chamber therein having a lateral aperture confronting the recessed opening.

Abstract: A hood assembly for an electrical connector includes a pair of complementary releasably engageable hollow housing shells. Each of the shells is a unitary molded one-piece structure which includes slots for receiving flanges of an electrical connector for mounting the connector in the hood assembly. Each of the shells also includes a longitudinally extending inwardly projecting rail or rib immediately adjacent the strain relief mechanism of the connector, or a strain relief adapter mounted on the connector, to press against the individual conductors and provide additional strain relief. The shells are provided with complementary recesses which are cooperable to form openings for passing bundles of conductors or individual conductors therethrough, the edges of the openings also functioning to clamp the conductors when the shells are connected together.

Abstract: A swivel electrical connector having an internal socket conductor for receiving a male plug therein and having an external conductor for receiving a spring contact in engagement therewith, the internal socket conductor and the external conductor being formed of concentric eyelets and encapsulated in a plastic body, the entire connector being constructed without the requirement of screw machine parts.