Abstract: A spacer mount for use in gas insulated transmission lines is comprised of two parts, each of which has a radially inwardly extending nub, and at least one of which has a longitudinally extending section to which the other member is secured. The two nubs are spaced apart a distance substantially equal to the longitudinal width of the spacer which is mounted therebetween.

Abstract: A circuit breaker having stationary and movable contacts operable between open and closed positions with the movable contact being biased in an open position. The movable contact is mounted to a contact holder which engages one link in a toggle means. The first link is connected to a second link which has a drive pin secured thereto, and the second link is pivotally connected to a toggle lever. A cam is secured to a rotatable drive shaft, and the cam engages a cam roller which is secured to a follower plate. The follower plate has a drive pawl attached thereto, with the drive pawl being disposed adjacent the drive pin. Spring means are pivotally connected to the follower plate and are capable of being in spring charged and discharged positions. The spring is charged by rotation of the drive shaft and cam causing the cam roller to move outwardly. The outward movement of the cam roller causes rotation of the follower plate, resulting in charging of the spring means.

Abstract: A circuit breaker including stationary contact means and a plurality of movable contacts operable between open and closed positions with respect to the stationary contact means. A plurality of contact springs engages the movable contacts, and the contact springs increase the engagement pressure between the stationary contact means and movable contacts when the movable contacts are in the closed position. A contact carrier engages the movable contacts, and holds them such that the movable contacts operate together between the open and closed positions. A crossbar and spring holder is secured to the contact carrier and has a plurality of openings therein for holding the contact springs and an aperture therethrough through which is disposed a cross arm. The cross arm extends outwardly from the crossbar and spring holder, and moves upon movement of the crossbar and spring holder, the contact carrier and the movable contacts.

Abstract: A circuit breaker having a stationary contact and a movable contact operable between open and closed positions with respect to the stationary contact. The circuit breaker includes means for moving the movable contact between the open and closed positions. These movement effecting means include an opening spring capable of being in two positions; a first position whenever the movable contact is in the open position, and a second position whenever the movable contact is in the closed position. An indicator rod is coupled to the opening spring and indicates the position of the opening spring.

Abstract: A gas-insulated transmission line including an elongated outer sheath and a plurality of elongated inner conductors disposed within the outer sheath. An insulating gas electrically insulates the conductors from the sheath, and support means insulatably support the conductors within the sheath. The interior of the outer sheath is separated into a plurality of discrete compartments by walls, with each compartment having disposed therein one of the inner conductors. The compartmentalization of the outer sheath minimizes the possibility of a fault being transferred from one inner conductor to the other conductors.

Abstract: A system to prevent supercriticality in nuclear power plants in the unlikely event of a core destructive accident terminating in the nuclear core meltdown. The system dilutes and poisons the molten core to maintain subcriticality, and is specially useful in mobile nuclear power plants, or in nuclear plants subject to seismic disturbances, where the orientation of the nuclear reactor after the accident is unknown. It is also applicable to alleviate the consequences of loss of coolant flow accidents from any cause. Aside from preventing supercriticality, the system serves the dual purpose of acting as a biological shield and/or structural member that reduces the deleterious effects of accidental core impaction, thus achieving its primary goal without compromising power plant weight and size constrants.A borated material, with a melting point greater than the fuel melting point, is inserted in the pressure vessel behind an inner wall.

Abstract: Gas-insulated electrical apparatus including a generally vertically disposed air termination, a horizontally disposed gas-insulated transmission line, and a transition member aligned with both the termination and the transmission line for interconnecting the transmission line to the termination. Termination support means are utilized for spatially maintaining the termination in its location, and these support means are fixedly secured to the transition member and slidingly supported on a base member. The sliding support compensates for linear thermal expansion of the transmission line while maintaining the support of the termination.

Abstract: A circuit breaker including stationary contact means and a movable contact operable between open and closed positions with respect to the stationary contact means. A contact holder engages the movable contact, and means are utilized for effecting movement of the movable contact between the open and closed positions. Indicator means indicate the position of the movable contact with respect to the stationary contact, and may also function to reset an automatic tripping mechanism.

Abstract: Metal-clad switchgear utilizing means to provide for self-cooling of the current transformers and primary disconnecting contacts. The support enclosure for the current transformers and the disconnecting contacts is apertured beneath the location of the current transformers, and air may enter the enclosure to cool the current transformers and contacts. A ventilating duct is in fluid communication with air within the enclosure, and transports the heated air from the enclosure to exhaust vents situated at the top of the metal-clad switchgear housing.

Abstract: A gas-insulated transmission line including an outer sheath at low potential, an inner conductor within the outer sheath at high AC potential, an insulating gas disposed within the outer sheath for electrically insulating the inner conductor from the outer sheath, and means for insulatably supporting the inner conductor within the outer sheath. Means for limiting the DC voltage on the inner conductor are included, with these means being responsive to the DC voltage on the inner conductor so that the DC voltage limiting means discharge the DC voltage on the line whenever the DC voltage exceeds a predetermined level.

Abstract: A circuit breaker having stationary and movable contacts operable between open and closed positions. Movement effecting means causes relative movement of the movable contact between open and closed positions, and a closing spring assembly imparts movement to the movement effecting means to move the movable contact to the closed position. The closing spring assembly includes first and second members and a helical closing spring, with the first and second members extending into the central opening of the spring. Shock absorbing means is disposed within the spring opening to absorb energy released when the assembly is discharged.

Abstract: A contact assembly for electrically connecting two electrical conductors wherein a plug member is secured to one conductor, and a hollow socket member is secured to the other conductor, with the plug being received by the socket member. The socket member has an annular recess therein, and a plurality of contact fingers are disposed within the recess. A holder is also disposed within the recess, and the holder has an axial projection extending therefrom adjacent the contact fingers radially outwardly therefrom. The holder projection and the holder are spaced apart from the socket member to form an annular space therebetween. Resilient biasing means are disposed between the contact fingers and the holder and acts upon the contact fingers, and loading means are utilized to produce a force upon the contact fingers.

Abstract: A compressed-gas insulated circuit breaker including two spaced apart electrical conductors within a sealed housing, a stationary contact electrically connected to one of the conductors, and a movable contact connected to the other conductor. The movable contact is coupled to a drive mechanism comprising a contact rod secured to the movable contact at one end, and pivotally coupled to a connecting rod at its other end. The connecting rod is pivotally coupled to one of a pair of arms fixedly secured to a rotatable positioning shaft. The other arm is pivotally coupled to a drive rod, and the drive rod is pivotally coupled to a centrally rotatable drive latch. The drive latch is secured to a rotation means, and upon rotation of the drive latch, the drive rod is moved, causing a rotation of the positioning shaft. Upon rotation of the positioning shaft, the connecting rod is moved, causing a longitudinal movement of the contact rod and the movable contact.

Abstract: A disconnect switch and drive mechanism therefor particularly adapted for use in gas insulated substations. The disconnect switch comprises a sealed tank having opposing ends through which electrical conductors enter the tank, and within the tank is disposed an electrically insulating gas. Also disposed within the tank are a pair of longitudinally spaced apart electrodes, and the electrical conductors are coupled to, and terminate at, the electrodes. A reciprocating switch blade is disposed within one of the conductors and is capable of being in two positions; one position in contact with both electrodes to permit the flow of electric current therebetween; and a second position spaced apart from one electrode to prohibit the flow of electric current. A drive mechanism is utilized for positioning the switch blade.

Abstract: A gas insulated transmission line section wherein an inner conductor at high potential is located within an outer sheath at low potential. An insulating gas is disposed within the outer sheath to electrically insulate the inner conductor from the outer sheath. A support insulator is disposed within the outer sheath, and this support insulator supports the inner conductor in a spaced-apart relationship with the outer sheath. Included is a barrier insulator which also supports the inner conductor within the outer sheath. The barrier insulator substantially fills the cross-sectional area between the inner conductor and the outer sheath so as to prevent substantially all arc products and contamination produced in the unlikely event of a fault from migrating past the barrier insulator. By so preventing the migration of these products, the gas insulated transmission line section is effectively compartmentalized and these products cannot contaminate adjacent transmission line sections.

Abstract: A portable ohmmeter for use in measuring the resistance of an electrical contact including a direct current battery, and a resistive element serially connected with the contact and the battery to form a complete circuit. Included are means for sensing the voltage drop across both the resistive element and the contact, and a digital ratiometer for displaying the value of the resistance of the electrical contact. The digital ratiometer displays the ratio of the voltage drop across the contact to the voltage drop across the resistive element, which ratio is also the value of the resistance of the contact. Also included are means for calibrating the ratiometer as a function of the resistance of the resistive element.

Abstract: A vertically aligned gas insulated transmission line includes an elongated cylindrical outer sheath with an elongated cylindrical inner conductor disposed within the outer sheath. An insulating gas is disposed within the outer sheath and support means are utilized for supporting and centering the inner conductor within the outer sheath. In one embodiment, the support means comprises a central member with a bore therethrough having a leg member which extends radially outwardly therefrom which is secured to the outer sheath. The inner conductor extends through the bore, and the leg member has an aspect ratio greater than 1. A second embodiment utilizes for support means a conically shaped insulator which, with the inner conductor, forms an angle therebetween which is less than 26.5.degree..

Abstract: A gas insulated transmission line including an outer sheath, an inner conductor disposed within the outer sheath, and an insulating gas between the inner conductor and the outer sheath. The outer sheath comprises an insulating tube having first and second ends, and having interior and exterior surfaces. A first electrically conducting foil is secured to the interior surface of the insulating tube, is spirally wound from one tube end to the second tube end, and has a plurality of overlapping turns. A second electrically conducting foil is secured to the exterior surface of the insulating tube, and is spirally wound in the opposite direction from the first electrically conducting foil. By winding the foils in opposite directions, the inductances within the intercalated sheath will cancel each other out.

Abstract: A gas-insulated transmission line including an elongated cylindrical outer sheath and an elongated cylindrical inner conductor disposed within the outer sheath. An insulating gas is disposed within the outer sheath for insulating the inner conductor from the outer sheath, and means are included for insulatively supporting the inner conductor within the outer sheath. Means for trapping particles which may be present within the outer sheath are included, and comprise a base member secured to the outer sheath about the periphery of an opening which is cut within the outer sheath, a mounting member secured to the base member and directed towards the inner conductor, and a trapping member fixedly secured to the mounting member.

Abstract: A containment vessel for use in mobile nuclear reactor installations. The containment vessel completely surrounds the entire primary system, and is located as close to the reactor primary system components as is possible in order to minimize weight. In addition to being designed to withstand a specified internal pressure, the containment vessel is also designed to maintain integrity as a containment vessel in case of a possible collision accident.