Abstract: Nipples are extruded on metal parts around holes therethrough by providing an initial hole having a wide portion and a narrower portion, the wide portion having the diameter desired in the finished hole. A tapered mandrel is forced through the initial hole, extruding a nipple and resulting in a hole of the desired diameter.

Abstract: An air cooled ceramic stopper valve and actuating rod for a bottom pouring ladle. Ceramic parts are assembled onto a metallic stopper rod which contains an enlarged head portion. The metallic stopper rod head is notched, so that refractory cement used to bond the ceramic parts forms a strong mechanical bond between the metal rod and the ceramic point of the valve. The notches provide enough strength in the joint between metal rod to ceramic point to permit shearing loose a frozen stopper valve by rotation (when the valve head [point] bonds to the ceramic orifice).

Abstract: A bowl mill for pulverizing coal, wherein two bowl surfaces are rotated on the same shaft. The raw crushed coal is pulverized in one of the bowls, and the pulverized coal therefrom is then transported in an air stream to a classifier from where the fines are carried on to the ultimate point of use, and the more coarse particles are discharged into the second bowl for further grinding.

Abstract: A tube support for horizontal tubes supported by vertical tubes, including lugs welded to opposite sides of the vertical tubes, and a band encircling two horizontal tubes positioned on opposite sides of the vertical support tube. The band rests on and is supported by the lugs.

Abstract: Apparatus for cleaning the air nozzles of a chemical recovery boiler, including a scraping sleeve slidable back and forth in the nozzle for removing built-up deposits. Also included is an air damper for regulating air flow to the nozzle.

Abstract: Apparatus for rapidly superheating steam flowing to a turbine, so that the unit can be quickly put back in operation after a short shutdown; i.e., a hot restart. The apparatus includes a unique burner for burning hydrogen and oxygen directly in the steam lines to the turbine.

Abstract: A pouring ladle for pouring molten metal into molds or other containers, including wall structure forming a chamber for holding the molten metal, a spout having wall structure forming longitudinal passage means therein, the passage having an inlet end in fluid communication with a chamber and an outlet end through which molten metal can be discharged, a drive gear arrangement is provided for rotating the pouring ladle about an axis of rotation, positioned such that the axis of rotation passes through the center of the discharge end of the passage, and the pouring ladle and spout being constructed such that the lower outer surface of the wall structure forming the chamber and the lower outer surface of the wall structure of the spout lie in the same horizontal plane when the ladle is in its full, non-pouring position. Thus, the entire ladle can be positioned above the mold while it is being filled with molten metal, or while the ladle is being moved to the pouring position.

Abstract: A steam generator having a coal fired furnace including water cooled walls, and having a hopper bottom. A plurality of steel struts are provided which extend between the furnace walls at a level at or above the top of the hopper bottom, and the furnace inlet ring header located at the bottom of the hopper, so that the unit can be bottom supported. The steam generating tubes extending upwardly out of the ring header and forming the furnace walls each contain a bend therein, so as to be flexible enough to accommodate differential thermal growth of the struts relative to the adjacent furnace walls during transient temperature occurrences.

Abstract: A main burner oil gun in which hard to ignite liquid fuels can be burned, including an ignition means for the oil gun which will reliably light the oil gun time after time. The oil is sprayed from the oil gun tip in the shape of a hollow cone. Air is introduced surrounding the oil gun, and flows over a baffle plate located transversely of the oil gun, creating eddies of air, some of which break through the curtain of fuel issuing from the tip in a conical shape. This current of air that breaks through the fuel carries some fine droplets of fuel along with it, and forms a recirculation zone extending back to the oil gun tip. The ignition means is located within the hollow conical fuel flow, along the inner edge of the recirculation zone, so that the initial flame established is carried back to a point directly in front of the oil gun tip.

Abstract: A pulverizer having four hydraulic drive motors for rotating the grinding ring or bowl. The motors are mounted so as to be easily accessible, so that one or more can readily be removed for repair during which time the pulverizer can remain in operation. The speed of rotation of the grinding bowl can be varied by either changing the pressure of the driving hydraulic fluid, or by stopping the supply of fluid to one or more of the motors.

Abstract: A control system for the hydraulic loading of the grinding rolls of a pulverizing mill, including a feedback servo system designed to incorporate a spring rate characteristic into the hydraulic loading of the grinding rolls.

Abstract: A rotary regenerative air heater or heat exchanger in which a series of parallel adjacent plates contained in a plurality of sectorial baskets make up the heat transfer surface. A plurality of bolts permit quick and easy periodic tightening of the heating plates when they become loose within the basket, thereby preventing abrasion and vibratory failure of such plates.

Abstract: Burner means for maintaining a weld in a large metal member at a predetermined temperature for extended periods of time regardless of the position of the weld, including two independent burners, and two independent control arrangements for the two burners, such that they maintain the entire weld at substantially the same predetermined temperature, in spite of the unbalancing effect of heat from the other burner.

Abstract: A multiple orifice assembly for increasing the flow resistance in a conduit for conducting fluid flow. The multiple orifice assembly comprises a plurality of orifices spacedly supported in the conduit and a diffuser which is supported intermediate adjacent orifices. The diffuser is spaced from the upstream orifice a distance less than that distance required for fluid issuing from the upstream orifice to fully expand back to the constraints of the conduit.

Abstract: Apparatus and a method for the inspection of tubes in a steam generator include a film-bearing cassette probe insertable into a target tube to a predetermined region to be inspected and a source of radiation, preferably a radioisotope, insertable into a tube adjacent said target tube to a position therealong laterally adjacent the region to be inspected on said target tube. The cassette probe is sufficiently flexible to transit regions of tight tube curvature.

Abstract: A vapor generator organization arranged for operation in a marine reheat power plant is described in which the reheater tube bundle is disposed in the rear gas pass section of the unit where it is subjected only to low temperature combustion gas during periods of ship maneuvering when no vapor flow occurs through the reheater tubes. A separately fired burner arrangement is operably disposed in the rear gas pass and adapted to be fired at times when the reheater is operative in the system.

Abstract: Method and apparatus are described that are operative to elevate the temperature of superheated vapor delivered to a turbine, especially during startup of a power plant. A bypass circuit containing a heat exchanger is interposed in the main steam generator evaporative flow circuit whereby regulated amounts of heat are extracted from the plant operating fluid thereby subcooling the same prior to its passage to the evaporator section of the unit. Reduced amounts of steam are thus produced in the evaporator section for a given amount of heat input to the unit and a concomitant increase realized in the temperature to which the steam passed to the superheater is heated.Economies as well as operational advantages are achieved by the production in the heat exchanger of low pressure steam that is usable in the plant to augment steam flow to the low pressure section of the turbine, for soot blowing purposes, and/or for other low pressure steam needs during startup and normal operation of the plant.

Abstract: A mixing device for intimately mixing two or more different materials including a rotatable member of circular cross section, a shaft rotatable along with the rotatable member having two or more vertically spaced discs fastened thereto, and means for introducing one of the materials onto each disc, so that centrifugal force throws the materials onto the inner wall of the rotating member, thereby causing intimate blending or mixing.