Abstract: The invention is directed to an improved boring and facing apparatus for performing in-situ machining on nuclear reaction feedwater inlet nozzles. The apparatus comprises a boring machine mounted upon a main frame which main frame is suspended from a structure mounted above the plane in which the inlet nozzle is located. Means are provided for adjusting the boring machine to permit a tool to operate along the center line axis of the inlet nozzle.

Abstract: In an axial-centrifugal flow impeller, a deflector ring is interposed between the impeller hub and the peripheral cage blades in order to redistribute the air flow discharged from the hub region of the impeller along the entire axial length of each impeller blade thereby eliminating air flow concentration at, and premature wear of, the root portions of the impeller blades. A 45.degree.-angle weld fillet ramp is annularly defined along the radially inner juncture of the deflector ring and the impeller support plate for simultaneously deflecting the air flow radially outwardly and axially rearwardly, along with the deflector ring, in a non-turbulent manner. Hard surfacing material is weld deposited over the deflector ring and fillet ramp for partial protection purposes as well as for forming guide vanes aligned with the impeller blades, and hard surfacing material is also deposited upon the trailing edge portions of the blades for increasing the wear resistant properties thereof.

Abstract: An impact device (15) applies hammer-like blows, or impact forces, to a metallic support frame (13) from which high-voltage electrodes (10) are suspended in an electrostatic precipitator in order to dislodge accumulated particulates from high-voltage electrodes (10). The impact device (15) is electrically isolated by an insulator (19) from metallic components of the precipitator other than the support frame (13) and components electrically connected to the support frame (13). The insulator (19) has a bore (18) that accommodates movement of the impact device (15) from a withdrawn position away from the support frame (13) to an impact position in contact with the support frame (13) upon energization and de-energization of a solenoid (17). The insulator (19) remains unstressed as the impact device (15) contacts the support frame (13).

Abstract: The foaming of resinous insulating materials under vacuum is substantially reduced by adding to the material a polydiene having primarily vinyl unsaturation.

Abstract: An electronic temperature sensing system for toaster appliances and the like which is capable of providing a consistent toast color independent of toast compartment temperature at the initiation of each toasting operation, the condition of the bread to be toasted and bread loading. The system includes principally a temperature sensing device having a varying resistance versus temperature characteristic that is placed in close thermal coupling with the bread to be toasted for developing a voltage Vs as a function of temperature, and integrating means for deriving a voltage Vu that is an integrated function of the voltage Vs and represents a varying reference temperature. The difference between Vs and Vu is obtained and compared to a given voltage corresponding to a given toast color for generating a signal that terminates the toasting operation upon said given toast color being reached.

Abstract: New and useful polymers are prepared by reacting olefin-terminated prepolymeric materials with simple polyamine, by reacting simple olefins with amine-terminated prepolymers and by reacting olefin-terminated prepolymers with amine-terminated prepolymers. The new and useful polymeric materials so obtained can be cured as with heat, with or without catalyst, to provide products useful for preparing films, laminates, composites, prepregs, molding materials, varnishes, wire enamels and the like.

Abstract: An electrical-acoustical ultrasonic transducer horn arrangement for operating in a transmit or receive mode at a predetermined frequency (f.sub.c) is described. The transducer horn arrangement includes a horn and an acoustical coupling means positioned within the horn for coupling acoustical energy between the horn and a limited area of a vibratory surface of the transducer.

Abstract: The foaming of resinous insulating materials under vacuum is substantially reduced by adding to the material a polydiene having primarily vinyl unsaturation.

Abstract: The invention relates to improved drain funnels and is formed by an elongated unitary main body member which has a spout integral with and at one end of the elongated unitary main body member. The elongated unitary main body member is substantially arcurate or "V" shaped and has a support integral with or mounted at or near the edges of the elongated unitary main body member to permit cans or the like to be mounted on the support so that the cans or the like may be drained.

Abstract: A circuit for controlling the brightness of a vacuum fluorescent display having filament terminals and connected to anode or segment biasing means includes a transformer having a filament winding connected to the filament terminals. The transformer is driven by a 60-cycle power source. An electronic switch, including a transistor, is connected between a center tap of the filament and the anode biasing means (at a common ground) and circuit means open and close the switch at a 60-cycle rate. The ratio of time during which the switch is closed to the time during which the switch is open is variable to control the brightness of the display.

Abstract: The present invention relates to an improved caulking tube with a superior seal between the plunger and the rear of the caulking tube which is produced by coating the inside of the rear end of the body of the caulking tube with a moisture proof cohesive chemical material such that after the caulking tube is filled with the desired material and after the plunger is inserted there is produced an airtight moisture proof seal.

Abstract: A metering method and apparatus is provided for the controlled discharge of powder from a fluidized-bed blender to a material container, which gives accurate material weights while separating powder from fluidizing gas. In this method the material container is filled with a series of short duration discharges at a reduced powder flow rate. This method enables the apparatus to more precisely measure the weight of the container and maintain homogeneity of the blended material in both the bed and the container. The apparatus for carrying out this method includes a flexible pressure-tight sleeve connecting the fluidized bed to the container. When a ball valve located at the bottom of the fluidized bed opens to discharge powder, the sleeve retains the high pressure fluidizing gas inside the sleeve and the container. This causes the pressure to build at the outlet of the valve thus preventing the gas from rapidly exhausting and forcing powder through the outlet.

Abstract: New and useful polyamideimide polyamines are disclosed which are used to prepare polyamideimide amic acids and polyamideimideimides useful as films, coatings and adhesives.

Abstract: A condensation nuclei counter for measurement of the concentrations of Aitken particles in gases by measurement of light scattered in a cloud chamber by water droplets formed on the particles in successive samples of a gas wherein the counter provides for sequential high speed sampling of the photodetector output during the cloud chamber growth of the droplets of each gas sample tested as a way of measuring the rate of increase of total droplet cross-section and wherein the counter provides for automatic ranging for particle population coordinated with the timed sampling during particle growth.

Abstract: An apparatus and method for precision overboring a variable diameter existing bore through a metal shaft supported in a position that causes the shaft to sag along its longitudinal axis. A plurality of precision-formed tool pilots are selectively mounted ahead of a spade bit on a rotary boring tool to maintain the path of the bit through the shaft-workpiece within a predetermined tolerance of the path followed by an existing bore. A plurality of fluted follower bearings are positioned around the tool driving shaft to minimize its vibration as the bit proceeds through the workpiece. Liquid coolant is passed at high volume into engagement with the bit and thence through the follower bearing exhaust passageways to flush metal shavings and chips from the overbore. According to the method of the invention, tool vibration is carefully monitored as the bit is forced into the workpiece.

Abstract: This disclosure is directed to an Automatic Gain Control (AGC) circuit wherein the AGC loop which generates the gain control signal is separate from and not closed through the amplifier whose gain is controlled. Such arrangement permits design of the AGC loop to follow a sampled data reference signal and yet have a response time much shorter than the period between samples.

Abstract: The present invention relates to a digitally controlled phase shift network for an analog flux-sensing ferrite phase shifter driver, as would be applied in controlling the phase of individual antenna elements in phased array radar systems. The phase shift network described utilizes analog phase shifters while accepting a digital control input, and provides phase control without need for digital-to-analog converters between the analog phase shifters and their digital inputs. This is accomplished by integrating the volt-time product on the phase shifter secondary windings until the integral reaches a value corresponding to a phase shift increment of predetermined magnitude, dumping the integrator voltage between integrations, counting the number of integrate-and-dump operations to thus yield a digital measure of the phase shift achieved, and comparing such digital count against the digital control input.

Abstract: An intermediate frequency sidelobe canceller of the kind including a cancellation loop, with provision added for programming the correlation signal weights which control operation of the loop. This capability is provided by switch means interposed in the cancellation loop within the correlation signal branch thereof and selectively operable to break the loop and then either to substitute for the normally weighted correlation signal to the canceller another signal of different weighting, such as an externally supplied signal, or to retain or "hold" the current value of the correlation signal. Such substitution affords improved canceller operation and adaptability to otherwise difficult operating conditions such as strong clutter and transmitted pulse interference.

Abstract: The electroacoustic transducer disclosed is of double mass loaded piezoelectrically driven type particularly adapted to high power sonar array application. For reducing transducer sensitivity to interference and noise of frequencies at and below the transducer moving assembly mounting resonance, without significant impairment of transducer efficiency even at high power levels in the active mode operating frequency bands, the transducer moving assembly mounting resonance is damped by provision of a resistive coupling which in its preferred form comprises a lossy rubber ring compressed between the transducer housing and the inertia mass. Corona suppression means effective at high power levels of operation as described also are disclosed.

Abstract: Disclosed is a radar signal processor providing Moving Target Indicator (MTI) operation with Constant False Alarm Ratio (CFAR) capability. The processor affords substantially reduced incidence of false alarms due to large clutter scatterer returns which exceed normal detection thresholds even after suppression by conventional MTI processing, and at the same time it affords largely unimpaired subclutter visibility. These capabilities are achieved by paralleling the MTI channel with a second processor channel which provides CFAR operation by imposing an additional detection threshold effective to blank the response of the MTI channel to very large clutter scatterers.