Abstract: A fly trap for capturing umbilical plugs ejected radially outwardly from a missile during the initial portion of the launch, the fly trap comprises impact and retention arms and a ratchet and compression spring which cooperate with a housing to allow the arms to only rotate a limited amount to retain the plug within the arms and prevent it from rebounding into the missile as the missile accelerates in the launch tube.

Abstract: A nuclear steam generator having a feedwater ring disposed in the upper portion of the steam generator above the tubes, the feedwater header having a plurality of J-shaped discharge nozzles, some of which are in fluid communication with the upper portion of the feedwater ring header and others being in fluid communication with the lower portion of the feedwater ring header, those in fluid communication with the lower portion of the feedwater ring header having a discharge elevation lower than those in fluid communication with the upper portion of the feedwater header so that during low feedwater flow operation feedwater is fed from the lower portion of the feedwater header removing cold water therefrom and promoting mixing of the feedwater in the header in order to reduce stratification of feedwater therein.

Abstract: A cooled resistor pack for a dynamoelectric machine wherein cooling water is passed through ducts in a conductive block and plurality of connectors are mechanically attached to the conductive block but electrically insulated therefrom and nichrome wires of varying length and varying in number electrically join the connectors to the conductive block and individually insulated brush segments, which have individual strands and the brush segments are connected to separate connectors in such a manner that the resistance between the brush segments and the block decreases from the trailing end segments to the leading end segments of the brush.

Abstract: A moisture separator is provided which incorporates two perforated plates assembled in association with a plurality of nipples. The nipples extend through a plurality of holes in a first of the two perforated plates. Each nipple is provided with one end which has an upset portion to prevent its complete passage through the holes of the first perforated plate. A second perforated plate is assembled with the first perforated plate in such a way so as to prevent the reverse passage of the nipples in a direction opposite that of assembly. The first and second perforated plates can be rigidly fastened together by bolting, riveting or welding. In a moisture separator made in accordance with the present invention, the individual nipples do not require welding, rolling or hydraulic expansion during the assembly process and do not have to be rigidly attached to either of the two perforated plates. The cooperation of the two plates holds the nipples in position.

Abstract: A joint is provided which permits clad members to be welded together and later used in a corrosive environment without subsequent degradation of the base or cladding materials. The use of an intermediate metallic layer prevents the close proximity of galvanically incompatible materials in brackish or saline environments.

Abstract: A moisture separator reheater having a central chamber with cylindrical wall portions and a generally round tube bundle, the tube bundle having arcuate plates disposed on each side of the bundle which form a wrapper on each side of the tube bundle and having a tongue and groove juncture between the wrapper and cylindrical wall portions to provide a seal therebetween and a track for installing and removing the tube bundle from the central chamber.

Abstract: A method for peening a portion of the inside of a small diameter heat exchanger tube by inserting a rotating shaft having a peening strip affixed thereto, orbiting and reciprocating the shaft as it rotates, and maintaining this operation for a predetermined length of time to relieve residual tensile stresses in a portion of a tube installed in a heat exchanger.

Abstract: Gauges for checking the radial orientation of integrally shrouded blades wherein the shrouds abut one another to form a generally continuous shroud, the gauge having a base which fits a cylindrical surface on the rotor and extends generally radially therefrom, the blade being contacted in at least two points by the gauge which has an anvil which moves as the orientation of the blade varies and a micrometer head which measures the movement of the anvil to give a digital indication of the orientation of the blade.

Abstract: Several means for providing superheated steam varying in pressure and temperature in a plurality of cavities serially disposed between blade discs of a steam turbine in which steam flows from a high pressure to a low pressure portion and improved seals disposed at the radially outer periphery of the cavities which cooperate with the means for providing superheated steam in the cavities to eliminate moisture in the cavities and eliminate stress corrosion in the blade discs.

Abstract: A plurality of rotatable turbine blades are formed integral with a shroud and platform and a plurality of arcuate plate root portions which are received by circumferential grooves in a rotor and are fastened to the rotor by three pins extending axially through the root portions and the rotor, the shroud and platform portions having a protrusion on one corner to support the trailing edge of one of the blade portions and a notch in the shroud and the platform on the corner opposite the protrusion whereby the protrusions on one group of blades register with the notch on an adjacent group of blades when the groups of blades are disposed in a circular array on the rotor.

Abstract: A fixture for lifting turbine discs without removing blades therefrom has a ringed-shaped base and a plurality of upper arms which extend radially outwardly and downwardly from the base. Each upper arm portion has a lower arm portion pivotally connected thereto so that the lower arm portion remains generally parallel to the base as it pivots and pivots back underneath the upper arm portion. The lower arm portions each have telescoping members which telescope in and out of their distal end to support different size discs.

Abstract: A seal for a large annular opening between two generally cylindrical surfaces. The seal being formed of a first portion having a base ring and a toroidal shaped arcuate portion extending from the central portion of the base ring, a lip portion extending radially inwardly and toward the high pressure portion from the end of the arcuate portion and a second portion having a base ring, both base rings being affixed to one of the cylindrical surfaces. The second base ring being disposed on the high pressure side of the first base ring and there being ribbons extending between the first portion and the second portion. The ribbons being made of a high strength material and being disposed on a predetermined pitch and attaching the free end of the first portion to the second portion to prevent the arcuate toroidal shaped portion from inverting, even though it is compliant and deforms substantially under pressure.

Abstract: An axial flow compressor blade extractor utilizing a pair of hydraulic C clamps to position a plunger so that it is aligned with the blade root and a hydraulic cylinder and rocker arm for transmitting a force to the plunger to shear the pin which affixes the blade to the blade groove and moves the blade therein.

Abstract: A holddown apparatus having a sleeve with a plurality of fingers, the reactive length of which is varied in order to provide any predetermined engaging and release force to detents which engage a groove in a shaft that is attached to a missile to form a passive holddown apparatus which is reusable.

Abstract: An integral flange for a composite dome closure wherein the flange has a lip on its lower outer periphery about which the flange rotates when a clamping force is applied to prestress the dome closure adjacent the flange to minimize the stresses in this area of the dome under normal internal pressurization of the dome closure.

Abstract: An electromagnetic projectile launcher having a pair of conductive rails with a breech and a muzzle end and an impedance electrically connected across the conductive rails adjacent the muzzle end of the conductive rails, and a second impedance in the muzzle end of the rails whereby arcs which commutate the current to the first impedance are confined within the muzzle to substantially suppress any external arc as the projectile exits from the launcher.

Abstract: A variable energy missile eject system comprising in combination water bypass valves that can be remotely operated to increase the flow of water into a hot gas stream to reduce the energy output of the missile eject system and thereby vary the energy applied to launch the missile by selectively operating the bypass valves.

Abstract: A system for lifting a turbine disc having a mounting flange or balance ring, the system comprising a fixture having a base which attaches to the flange or balance ring, in elongated portion which extends beyond the periphery of the disc and a cantilevered portion extending from the distal end of the elongated portion and over the tips of the blades, eyelets disposed on the cantilevered portion and on the lower portion of the disc. The eyelets on the cantilever portion are disposed over the center of gravity of the assembly and a pair of hoists attached to the eyelets to lift the disc and move it to any orientation without damaging the blades.

Abstract: A segmented seal for a large annular space formed from an annular array of overlapping seal segments having a plurality of said seal segments provided with a bulbous distal end with a hole in the bulbous portion, the hole in adjacent bulbous portions registering to form a continuous opening which receives a tubular member that positively interlocks the ends of the seal segments so that they bridge openings in an outer cylindrical member.

Abstract: The conductivity of the laminations in an armature which conducts current between the launcher rails or switch rails of an electromagnetic propulsion system is graded such that uniform current density is achieved in each lamination. The conductivity of each lamination, which increases from the breech end to the muzzle end of the armature, is related to that of the lamination at the breech end by a single proportionality factor which is a function of the length of the armature in the direction of armature travel, the half-width of the gap between the rails, the velocity of the armature, the magnetic permeability of the rails, and the conductivity of the breech laminations and of the rails.