Abstract: A ventilating arrangement, particularly an air conditioning arrangement, for a vehicle has an air passage extending from outside into a passenger cabin, and a flow regulating flap associated with the air passage and turnable by an adjusting motor, an impeller located in the air passage and driven by an electric motor with a variable rotary speed, and a pressure measuring element which is connected with the air passage upstream and downstream of a flow resistance arranged in the air passage and formed, for example, as a heat exchanger.

Abstract: An electric fan and mechanism therefore for controlling the wind direction of the fan upwardly and downwardly and rotationally through 360.degree. as well as 90.degree.. Separate clutch elements are provided with a cooperating clutch pin selectively controlled by a rotatable lever to engage one or the other clutch element, or neither, to regulate the desired rotational movement of the fan.

Abstract: The sideplates of a turbine rotor assembly that seal between turbine stages are retained by a retention assembly that hooks onto the front sideplate and is riveted onto the rear plate negating the necessity of rivet holes in the front sideplate. A plurality of segmented sideplates circumscribe the full hoop of the rotor and each sideplate carries a retention assembly rather than providing a retention assembly for each blade which is greater in number.

Abstract: The device is composed of a conical section located on the edge of the disk rim. The greatest radius of the conical section is at least equal to the radius of the circumference passing through the bottom of the axial grooves into which the blade roots are inserted. A groove is formed in the end of the lower part of the root, this groove having a right angle triangular section. A locking part has one face pressed against the bearing and two other faces against the sides of the groove in the root. A blade extending longitudinally in the locking part works together with a groove in the slot of the blade root to keep the locking part in place.

Abstract: The blade has an aerofoil portion (16) having a first (23), a second (24), a third (25) and a fourth (26) internal spanwise passage for cooling air arranged in chordwise succession with the first passage being at the leading edge wall (17) of the blade. The first and third passages are connected to respective a cooling air supplies (14A,14B) at the root end (11) of the blade. At the tip (28) of the blade the third passage is connected to the second passage to introduce air, warmed on passing through the third passage, into the second passage and ameliorate undue cooling of the internal walls (19,20) between the first, second and third passages. The third passage is also connected to the fourth passage for supply of cooling air to the trailing region of the blade. The second passage has outlets (24A) to the exterior of the blade whereby the flow through the second passage is controllable independently of the air supply to the fourth passage, i.e. to the trailing region of the blade.

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: Two concentric, partially overlapping annular plates mounted on a parallel support plate are provided for partly defining the gas flow path and for shielding bearings, etc. from hot combustion gases in a radial flow gas turbine. The radially outer plate is cooled by compressed air channeled past the plate surface opposite the combustion gases. The compressed air is metered to achieve a temperature distribution decreasing in the radially inward direction for providing sealing contact between the outer edge and the support plate. The radially inner plate is cooled by film cooling using the compressed air exiting the outer plate channel in the vicinity of the overlap.

Abstract: Hot spots in the first stage turbine nozzles of small and medium sized engines are eliminated by spinning the nozzle assembly which consists of an annular hub circumscribed by a nozzle diaphragm having an inner and outer shroud ring between which are a multiplicity of symmetrically positioned vanes of airfoil design. Power to turn the nozzle assembly is obtained by connecting it to a rotary-type, vaned diffuser stage which lies in radial alignment with the impeller of the engine compressor. The rotary diffuser and nozzle combination is configured to turn at 50-1,000 rpm enabling the combined assembly to be mounted on unlubricated ceramic bearings.

Abstract: A lateral-duct fan having a lateral duct approximately of the shape of a torus cut normally to its axis of symmetry, and having a coaxial impeller having axially-symmetrically lined-up blades at its front side in a ring-shaped recess that faces essentially opposite the lateral duct with an axial gap therebetween. In order to reduce the critical interdependence between the size of the axial gap and the output of the fan, and thus increase the tolerances during the adjustment of the axial gap, i.e., to improve the output values of the fan with the same axial gap, it is provided that the radius of at least one edge of the recess, measured at the front side of the impeller, is smaller than the radius of a closest edge of the lateral duct, measured at an inner surface of a housing in which the lateral duct is formed.

Abstract: Air is bled from the compressor of a gas turbine engine and it is led to holes in the shanks of turbine blades, so as to cool the interiors of the blades during operation of the engine. Some of the air leaks radially outwards, to seal the gas annulus against hot gas leaks onto the face of the turbine disc. A reduced flow of cooling air is enabled at conditions other than engine full throttle. This however, starves the gas sealing air. The invention provides a back up supply, by putting the air through a plenum chamber and dividing it so that when cooling airflow is reduced, a further sealing air flow is provided in compensation therefore.

Abstract: A propeller formed from pliable sheet material with each blade being of looped configuration in plan view. An end segment of each blade is turned inwardly and attached to an inner segment of an adjacent blade at a point offset from the propeller hub portion. A blade root of each blade is of reduced width and extends between a blade inner segment and the propeller hub portion which is apertured to receive a motor output shaft having frictionally engaged disks thereon which oppositely abut the hub portion for shaft attachment purposes.

Abstract: A hollow rotor shaft 34 having a bore 36 sealed by an end cap 40 is disclosed. The end cap abuttingly engages a first side 42 and second side 44 on the shaft which extend radially inwardly into the bore of the shaft. The sides face in opposite directions and are oriented in a generally axial direction. The end cap includes at least one dog 48, a cover 46 pressed tightly against the first side by the rotatable dog and a lock means such as the bolt 50. The dogs are rotatable to a first position during insertion and rotatable to a second position during assembly by the lock means which extends through the cover to permit assembly and disassembly of the end cap from the exterior of the rotor shaft. In one embodiment a gasket 72 is trapped between the side of the shaft and the cover by the side of the shaft and the cover.

Abstract: An apparatus for agitating and transforming settled sludges into slurries which are then capable of being pumped by conventional means. The apparatus comprises a housing immersible in the contents of a tank or chamber and containing separate variable drive means for an impeller and an impeller casing. The impeller casing forms an inlet to the impeller and has a plurality of radially directed outlet nozzles whereby rotation of the impeller effects circulation of the contents of the tank or chamber from the inlet to the outlets and rotation of the casing causes the discharge at the outlets to agitate the contents. The discharge at the outlets breaks up solid sediment at the bottom of the tank or chamber and a continuous recirculation of the contents results in the formation of a slurry.