Abstract: Improved fuel atomization for turbine engines operating at low fuel flows and at high altitudes is accomplished in an engine 10 having an annular combustor 12 by utilizing fuel injectors 18 provided with fuel supply tubes 24 disposed within air tubes 20 wherein the fuel supply tubes 24 each have an exit orifice 26 internally of the corresponding air tube 20 and upstream of an exit orifice 22 thereof with a fuel impingement surface 28 being provided within the air tube 20 in confronting relation to the exit orifice 26 of the fuel supply tube 24 to produce a conical fuel film 36 subjected to pressurized air to enhance fuel atomization.

Abstract: The problem of preloading a rotor assembly (14) in a dynamoelectric machine (10) of the permanent magnet type is solved by providing a hub (20) having a plurality of outwardly opening, annularly spaced slots (22, 24). The slots are outwardly converging and separated by outwardly diverging partition portions (26) of the hub. A plurality of outwardly converging permanent magnets (30) respectively are disposed in the slots. A containment shell (32) surrounds the hub. Wedges (36) are inserted between the base of each permanent magnet and the bottom (24) of its respective slot for loading the permanent magnets radially outwardly toward the containment shell and against the sides of the slots, thereby to place the partition portions of the hub under tension in a static condition of the rotor assembly.

Abstract: Inexpensive cooling of a gas turbine nozzle and shroud assembly 62, 66, 76 is obtained by locating passages 84, 88, 102 in the vanes 76 forming part of the nozzle structure 62, 66, 76 so as to open generally centrally of the vanes 76 in the area between the shrouds 62 and 66 and in the leading edge of the vanes 76.

Abstract: In a flat gathering binding system it is necessary to use a cover breaker to apply pressure to the book and cover to form a sharp square fold on each side. A cover breaker control system includes a motor which is coupled to a cover breaker carriage for varying the relative position of first and second movable cover breaker plates which are used to apply the pressure. A controller calculates the difference between book thickness which the plates are set for and a desired thickness, and is operable to vary the relative positioning by a distance corresponding to this difference so that when the plates are driven to break the cover they are spaced a distance apart according to the desired thickness.

Abstract: In order to continuously supply lubricant to compressor bearings independent of attitude, and under varying gravitational forces, an oil supply system (10) includes an oil sump (14), a pump (22), and a suction tube (24). The oil sump (14) is defined at least in part by a pair of intersecting sump walls (16, 18) each of which may comprise a primary wall dependent upon instantaneous compressor attitude. The pump (22) is adapted to supply the compressor with oil (20) while at the same time removing gases from the oil (20) and expelling the removed gases into the oil sump (14). Additionally, the suction tube extends from the pump to a strategic point within the oil sump (14) for drawing oil (20) from the oil sump (14) to the pump (22) in a manner assisting in priming and repriming during brief interruptions in the flow of oil (20) from the oil sump (14).

Abstract: The problem of minimizing size and weight parameters in an impeller-type centrifugal pump system (10), including a liquid ring priming pump (32), is solved by providing a housing (12) defining a fluid inlet (26). An impeller (16) is rotatably mounted downstream of the inlet on a rotatable shaft (18). A pressure balance chamber (42) is located behind the impeller to provide for thrust balancing of the impeller. A first passage (44) extends directly through the impeller communicating inlet pressure with the balance chamber. The first passage has an inlet forward of the impeller blades. The liquid ring pump is rotatably mounted on the shaft and is located behind the balance chamber. A second passage (46) communicates the inlet pressure in the balance chamber with the liquid ring pump outside the rotating shaft.

Abstract: A corrugated mold block for a vacuum machine for molding corrugated tubes is formed of a plurality of sub-blocks rigidly secured end to end. Each sub-block has an arcuate face which is corrugated with not more than one complete wavelength of circumferential grooves and lands, and two longitudinally spaced end surfaces. A vacuum channel is provided about one of the end surfaces of each sub-block, and openings in each sub-block connect the channel and the face. When the sub-blocks are secured together into a mold block (and when mold blocks abut during molding), the vacuum channels and openings together define vacuum passages for each of the corrugation grooves, which passages are all connected to a vacuum source for drawing a vacuum during molding.

Abstract: An annular combustor having radial dilution air injection in a gas turbine is disclosed. The gas turbine includes a rotor having turbine blades and a nozzle adjacent the turbine blades which is adapted to direct hot gases at the turbine blades to cause rotation of the rotor. The annular combustor is disposed about the rotor and has an outlet to the nozzle, spaced inner and outer walls, and a generally radially extending wall connecting the inner and outer walls. The gas turbine includes a housing substantially surrounding the annular combustor in spaced relation to the inner, outer and radially extending walls to define a dilution air flow path. The dilution air flow path includes a compressed air inlet in communication with a compressor supplying dilution air at one end thereof and a compressed air outlet in communication with the annular combustor adjacent the outlet at the other end thereof.

Abstract: The invention discloses a vibratory conveyor arranged so that the vibrations have a substantially greater horizontal than vertical movement. More particularly, the vertical acceleration of material carried by the material-carrying member is less than the acceleration of gravity and therefore the material conveyed does not physically leave the surface of the material-carrying member. The result is a smooth flow of material from one end of the material-carrying member to the other.

Abstract: A spacing ring for placement between a radially inwardly facing annular surface on a first member and a radially outwardly facing annular surface on a second member to maintain the first and second members in predetermined radially spaced relationship. The ring consists of a plurality of matted threads formed into an annular configuration. The ring has a radially inwardly facing surface to surroundingly engage the radially outwardly facing annular surface on the second member and a radially outwardly facing surface to be surroundingly engaged by the inwardly facing annular surface of the first member with the radially inwardly facing annular surface on the first member and the radially outwardly facing annular surface on the second member in axially overlapping relationship. The invention also contemplates a method of forming the spacing ring. The wool material is wrapped around an annular surface ona core bar.

Abstract: A heat exchanger is provided with a plurality of fins connected in thermal communication with a tube. The tube is shaped to conduct the flow of the first fluid and the fins are arranged to be disposed within a stream of flow of a second fluid. The fins are provided with a plurality of holes, or perforations, through which the second fluid is directed to flow. The holes through the fins are generally oblong in shape, being somewhat elliptical. The oblong hole has two generally semicircular ends and two connecting long sides, wherein one of the long sides is generally flat and the other long side is provided with a cusp surface which divides the oblong hole into two generally equal portions. The relative position of the cusp surface to the long surface creates counter rotating vortices in the flow of fluid as it passes through the hole. These counter rotating vortex pairs wipe the surface of an adjacent fin when the flow is directed to impinge against a non-perforated portion of that adjacent fin.

Abstract: A timing apparatus for giving an indication of the passage of a preselected time interval, which timing apparatus consists of a body to be supported on a surface, a timer mechanism on the body including a trigger that is movable between a) a set position and b) a return position, structure on the timing mechanism for moving the trigger from its set position to its return position within a preselected time interval, and structure for repositioning the body relative to a support surface for the body as an incident of the trigger moving from its set position into its return position, with the body in an operative position on a support surface for the body, to give a visual indication of the passage of the preselected time interval.

Abstract: An elastomeric adhesive composition useful in resurfacing applications is provided. The composition includes a liquid dispersion of a polar latex resin binder, a chemical plasticizer, a volatile glycol ether solvent and a thickening agent. The binder is an emulsion of water and a polyvinyl acetate homopolymer with a polyvinyl alcohol protective colloid and is present in a concentration effective in adhering a resurfacing fabric to a surface wetted with the composition. The chemical plasticizer acts to plasticize and tackify the latex resin binder. The thickening agent is present in an amount effective to modify the viscosity of the composition so that it will not flow once applied to a surface. In addition, the invention comprehends a resurfacing composition and a method of resurfacing.

Abstract: An improvement is disclosed in an ice making apparatus having a cabinet provided with means for forming a plurality of ice bodies and an ice collecting bin therebelow for storing formed ice bodies. The improvement comprises a water storage tank positioned in the ice collecting bin and having an open top portion for receiving a select portion of the plurality of ice bodies formed by the forming means and to melt the same to provide fresh water. The top portion is positioned to prevent entry of ice bodies from the collecting bin. Means are provided for delivering a desired quantity of fresh water from the tank to a water dispenser associated with the cabinet.

Abstract: The frequency of the signal is determined by counting the period of the signal. A round-off circuit increments the count if the end of the signal occurs after the midpoint between counts.

Abstract: A pipe machining apparatus includes a tool carrier, with a frame attachable to a pipe for rotatably mounting the tool carrier. The tool carrier is circumferentially rotatable about the pipe and carries a tool for performing cutting or machining operations on the pipe. A plurality of rotatable bearings are provided between the frame and the tool carrier, and the bearings are individually adjustable in a radial direction to compensate for wear of the bearings during use of the apparatus.