Abstract: A combination flywheel, fan and pulley assembly is provided having a three piece construction, namely a central hub, at least one metal disk, and a stamped sheet metal centrifugal fan. The central hub is provided with a first circumferential surface for supporting at least one metal disk and a centrifugal fan. The hub is further provided with a bore extending at least partially through the central hub to enable the hub to be mounted on the motor shaft. The centrifugal fan has a plurality of circumferentially spaced apart radial extending blades which project axially from a generally flat face. The fan and at least one disk are securely mounted to the hub providing an integral unit. The construction method enables a wide variety of flywheel weights and hub geometries to be simply fabricated with minimal expense and production delay.

Abstract: A fan wheel for high-temperature operation, especially in ovens, includes a star-like or ray-like base plate having a central middle region, protrusions protruding substantially radially beyond the central middle region and having an outer contour, axially drawn up blades disposed on the protrusions and a base plate surface with axially drawn up segments extending from the middle region into the vicinity of the protrusions. According to one embodiment, the segments include a central, annular segment and star-like or ray-like segments adjoining the central, annular segment and extending through the protrusions of the base plate substantially symmetrically with the outer contour. According to another embodiment, the segments include a central, annular segment and star-like or ray-like segments adjoining the central, annular segment, originating from the central, annular segment and following the outer contour of the base plate.

Abstract: A ceiling fan is disclosed as including a motor and a plurality of fan blades, each of which is a contoured metal blade. Each fan blade has an enlarged leading edge and an end edge, which have been rolled over to establish a thickness of three-sixteenths of an inch at the forward, or "impact" side. Such thickness meets the recognized industry safety standard for fans used in low height applications, wherein the fan is secured to a ceiling spaced eight feet above the floor, and the fan blades are suspended from a depending shaft at an elevation of seven feet above the floor. Such unique arrangement allows high velocity, contoured metal fan blades to be used in applications formerly reserved for wooden paddle fans with blade thicknesses of at least three-sixteenths of an inch.

Abstract: A centrifugal blower wheel is provided with forward-curved multi-blades comprising a pair of end rings, a plurality of blades and a disk. By separating the blades into "vane members" which assume the function of a fluid device and "vane attachment members" which assume the function of a high speed rotating device, there is a greater degree of freedom of design, so optimum materials and shapes can be assigned to these different functions. The end rings, vane attachment members and disk are therefore constructed of metal and provided with beads so as to give a highly rigid structure, while the vane members are constructed of non-metal. This makes it possible to provide a blower wheel which is more lightweight and quieter in operation than a conventional blower wheel.

Abstract: The apparatus for mixing cement includes a shaft connected to an engine for rotating the shaft. The shaft has mounted thereon a plurality of paddles for providing a pushing force and arranged so as to channel the flow of cement mix about the shaft to allow complete and efficient mixing. In one embodiment the paddles are arranged with faces parallel to the axis of the shaft and apertures are cutout for controlling the flow. In another embodiment, the paddles are notched plates that are bent to provide pushing surfaces and formed so as to channel the flow about the shaft.

Abstract: A high solidity impeller has a number of equally spaced blades, each formed from a sheet that is bent to a continuous cylindrical curve along a roll axis that lags (in the rotation direction) the radius at which the blade is attached to the shaft. The blade also is pitched by rotation around the radius, i.e., the leading edge is raised in the flow direction and the trailing edge is lowered. The roll axis preferably lags the radius by 45.degree.. This arrangement provides a good approximation of a true hydrofoil and results in an excellent reconciliation between interests of material and manufacturing cost vs. pumping efficiency. The blades can be formed by rolling asymmetrically shaped contours cut from a flat sheet. A base member and preferably a connecting arm couple each blade to the shaft. The base member abuts the rolled contour along surfaces referenced to the roll axis, which surfaces can be used as a reference for rolling.

Abstract: A low cost assembly and method for assembly of a fan having a hub, a spider with arms and blades attached to the arms is provided. The spider is arc welded to the hub and the blades are projection welded to the arms. The blades have a root, a tip, and an ear. The width or chord of the blade decreases from the root to the ear and then increases from the ear to the tip. The blade has an air foil shape defined by the arcs of two circles. The radii of the circles and, thus the profile of the blade, change as a function of the cord length and the camber of the blade. The blades have a pitch angle which decreases from the root to the ear. The spider arms are formed to match the pitch and are rotated slightly with respect to the horizontal. The result is a highly efficient, low cost fan blade assembly construction.

Abstract: A grenade device for use with and for ejection from an artillery shell is ovided. The device includes a stabilizing propeller and a grenade body. The propeller has two opposite blades disposed on opposite sides of a rotation axis. Each blade has an upper tilted portion and a lower substantially flat portion and a connecting return bend tip portion. Each such portion has a leading edge and a trailing edge. Each upper tilted portion has a transverse angle of attack. The upper tilted portions have a common longitudinal upper projected axis. The lower flat portions also have a common longitudinal lower projected axis. The common longitudinal upper projected axis and the common longitudinal lower projected axis form a projected displacement angle therebetween. The propeller is made from a flexible metal or fabric ribbon. The blades are folded in a nested arrangement before descent. During descent, the blades unfold to their overall aerodynamic shape. The propeller has a windmill type of rotation during descent.

Abstract: An engine cooling-system fan formed by combining two fan assemblies of like construction. Each fan assembly comprises a sheet-metal hub with radiating spokes, and a set of fan blades fastened one to each spoke. The hubs of both fan assemblies are riveted or otherwise joined together in axial alignment, with the two sets of fan blades arranged alternately at constant angular spacings. Preferably, the spokes of either or both of the fan assemblies are offset to provide the same plane of rotation for the two sets of the fan blades.

Abstract: The metal plate stator case (1), for radial centrifugal pumps, includes a main body (2), a diffusion volute (10), an axial suction inlet (3) and a radial discharge outlet (4) at the output of the diffusion volute. The volute is constituted by a circumferential channel (11) which is defined in the lateral wall of the main body and has a radial transverse cross section which increases uniformly toward the output of the volute. At least one portion of the channel has, in transverse cross section, a substantially constant radial depth and a uniformly increasing axial width.

Abstract: An impeller formed from sheet-metal by stamping and bending, at a low production cost, capable of delivering an increased quantity of air at a reduced noise level and with reduced power consumption and enhanced efficiency. The method of manufacturing the impeller from sheet metal incorporates sufficient versitility to allow the blades of the impeller to be formed to any desired configuration in order to provide an optimum shape for the intended impeller use. The blades can be curved or twisted and can extend perpendicular from the sheet-metal surface or at any desired angle for optimum utilization.

Abstract: A grenade device for use with and for ejection from an artillery shell is ovided. The device includes a stabilizing propeller and a grenade body. The propeller has two opposite blades disposed on opposite sides of a rotation axis. Each blade has an upper tilted portion and a lower substantially flat portion and a connecting return bend tip portion. Each such portion has a leading edge and a trailing edge. Each upper tilted portion has a transverse angle of attack. The upper tilted portions bave a common longitudinal upper projected axis. The lower flat portions also have a common longitudinal lower projected axis. The common longitudinal upper projected axis and the common longitudinal lower projected axis form a projected displacement angle therebetween. The propeller is made from a flexible metal or fabric ribbon. The blades are folded in a nested arrangement before descent. During descent, the blades unfold to their overall aerodynamic shape. The propeller has a windmill type of rotation during descent.

Abstract: A method and device for mounting and centering a thin wall hub of a driven member onto a drive shaft provides the shaft with a radial end face which projects an axially extending reduced diameter threaded stud which fits within a central aperture of the hub and secures a nut to clamp the hub between the end face and nut. A raised shaft embracing portion centered on the hub axis snugly embraces the outer periphery of the drive shaft and axially aligns the two members. The drive shaft may also incorporate a drive pin which extends axially from the end face and is seated in a second aperture in the hub to provide effective driving of the hub by the drive shaft.

Abstract: An enhanced, air-flow convection oven is disclosed, comprising an oven chamber liner circumscribed by a thermally insulated outer oven shell with a heat source in a combustion chamber between the shell and the liner. Hot air flows from the combustion chamber and into a uniquely constructed blower wheel assembly. The blower wheel assembly has a concave central plate configuration which creates a negative pressure behind the blower wheel assembly, inducing a flow of hot air from the back of the blower wheel assembly into the blower wheel assembly as the wheel rotates. This hot air is mixed with air from within the chamber to produce uniform heating throughout the chamber.

Abstract: A system for fabricating fan blades wherein the assembly includes a flat hub plate having generally radially oriented notches defined therein intersecting the plate periphery. Individual blades each include a hub connection portion adjacent an inner end region which includes parallel flat portions angularly related to the general blade configuration interconnected by a transition portion. The flat blade portions are located upon opposite sides of the hub plate and the transition portion extends through the hub plate notch. The flat portions are attached to the hub plate, and by predetermining the position of the hub connection configuration on the blade, the fan characteristics can be predetermined and accurately duplicated. The system permits a standard set of tools to form a variety of sizes of fan blade components having various characteristics.

Abstract: The invention relates to a liquid atomizer having a liquid atomizing rotor rotatable about an axis, and designed to feed a liquid into its inlet, along a liquid flow surface of the rotor and through its outlet as an atomized spray. The liquid flow surface is formed by a bent sheet member, fluted or zig-zag in formation, forming a closed figure surrounding the axis, and two generally symmetrically formed sheet portions, and doubler seams on diametrically opposite sides of the sheet portions for counterbalancing during rotor rotation about the axis.

Abstract: The axial fan produced by the novel method may have a cylindrical shroud, an impeller mounted coaxially within the shroud, and a bell-shaped deflector extending across the exhaust to redirect the airflow toward radially outward directions. A malleable blank may be cut and shaped to form the impeller having at least three blades, the peripheries of which define a cylinder coaxial with the shroud. The impeller should have a depth-to-radius ratio exceeding 0.5.

Abstract: A guide vane ring for a return flow passage in axial fans comprises a ring (3) intended for placing in the return flow passage (4) coaxial with the impeller (6). A plurality of guide vanes (7) are formed integral with the ring and distributed round its exterior circumference. In a method of producing such a ring integral with its vanes, separate longitudinal slits are formed in a line one after the other in a metal strip. A cut is made transverse the strip between one end of each slit and one long edge of the strip. Portions of the band thus cut free are bent out from its plane and formed to a desired configuration, whereafter the formed band portions are bent such that the transverse cut lines will extend substantially at right-angles to the unformed flat band portion. This flat band portion is cut to desired length, formed and joined together into a circular ring with the portions formed to desired configuration forming exterior, substantially axially disposed guide vanes.

Abstract: A rotary fluid propelled device employing a natural theory of constriction and controlled redistribution to convert fluid flow to rotary mechanical energy. Two conical shell-shaped compartments opposite each other are connected by a midaxis transfer band forming the device. Rotary mechanical energy, mechanical lift force and high visual interest result from the operation of the device.

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: An AC generator for vehicles has a cooling fan secured to one end face of a rotor core and being operative to produce radial and axial flows of cooling air. The radial air flow passes across a stator coil and outwardly through air outlet openings formed in a peripheral wall portion of a housing. The axial air flow passes through spaces between respective fingers of rotor core and also through air gap between the rotor and stator whereby the rotor and stator coils are reliably cooled by the cooling fan. In an embodiment of the invention, an additional radial-flow fan is provided and mounted on the rotor in face-to-face contacting relationship with the other end face of the rotor core.

Abstract: The present invention provides a propeller or windmill blank comprising a planar sheet of material having markings defining, or being shaped to have, a central or hub region and two blades extending in opposite directions along imaginary lines; and wherein the blank has a marking or line of preferential folding inclined to the first mentioned lines which, when the blank is bent therealong, will result in pitch being applied to the blades.

Abstract: A windmill blade system with two distinct blade ends with each comprising a center area having a series of identical projections equidistant from a central mounting orifice in the center area. Each of the projections consist of an upward and a downward facing triangle sharing a common base. When the blade units are combined by aligning the center areas of each, the triangles of the upper blade unit are above the plane formed by the center areas and the lower triangles of the lower base units are below that plane. With the lower blade unit projections forming a mirror image of the upper ones.The invention also contemplates a windmill having at least one of the blade systems rotating horizontally about a vertical shaft.

Abstract: Disclosed is a centrifugal-blower impeller made from a back plate and a front plate and blades attached between these plates. The back plate or the front plate of the impeller or both of them are prestressed in a direction opposite to the stresses produced by centrifugal force when the impeller rotates. According to a preferred embodiment of the impeller the back plate is prestressed by means of a stressing member having the shape of a truncated cone, which is supported by the inner end of the hub of the driving shaft of the blower. In addition a stressing flange is attached to said hub and is tightened to the back plate by means of bolts. The front plate may be prestressed by means of a stressing ring mounted on the suction ring of the front plate.

Abstract: A supercharger for compressing air supplied to an engine having an intake manifold and an exhaust gas manifold wherein the energy of the exhaust gas is used to increase the intake manifold air pressure, the supercharger having a rotor with radially extending vanes that define a plurality of rotating cells therebetween, exhaust gas inlet and outlet ports at one end of the rotor, air inlet and outlet ports at the other axial end of the rotor, which ports open communication between the engine exhaust manifold and the engine inlet manifold respectively as the rotor rotates each cell into alignment with the ports, the rotor vanes being formed with a stiffening bead and being arranged around the rotor circumference so that they are spaced from one another by an unequal amount that may very either uniformly or nonuniformly around the rotor.

Abstract: Force transferring elements are disclosed which include a metal or plastic hub deep drawn or elongated with a flange extending therefrom and functioning as a force transferring element. The hub and flange may be of one piece with the flange having blades extending outwardly from the hub, the hub around its circumference being provided with a plurality of indented portions or corrugations to provide a spring action for engagement with a shaft. In another form of the invention two similar pieces are utilized each with a deep drawn or elongated hub and having outer rims which together receive a V-belt or the like. The elements may be connected to a shaft for input to the shaft, or may be carried on the shaft as energy converting or driving members.

Abstract: Disclosed is a centrifugal-blower impeller, which consists of a center part and radially outer part, which has a smaller thickness of material than the center part. The outer part consists of ring segments attached by welding to the periphery of the center part. The ring segments are first welded to the center part and thereafter radially to each other so that the ring segments are subject to tensile stress and the center part to compressive stress.

Abstract: A cooling fan for an automotive vehicle includes a spider having arms projecting from a hub. Rivets attach blades and reinforcing plates to each of the arms, and each of the rivets extends through the reinforcing plate, the blade, and the corresponding arm. Each blade has a depressed portion defining a rim circumscribing the depressed portion, and the corresponding plates have a depression defining a flange which is adapted to engage the rim when the blade is installed on its corresponding arm. The contour of the plate is different from the contour of the blade, but the rivet forces the plate to assume the contour of the blade when the plate and the blade are installed on the arm. Accordingly, the plate is preloaded to thereby transmit bending forces to the rim which would normally be taken by the portion of the blade adjacent the rivet.

Abstract: A blade of the fan wheel of a diagonal-flow fan, which blade should ideally have a shape of a twisted double-curvature or undevelopable surface, is formed from a portion of a cylinder, which has a single-curvature or developable surface. To realize the formation of a blade from the single-curvature surface, lines of intersection between a cylinder and a number of coaxial imaginary conical surfaces representing streamlines in the fan wheel are used as a basis for design.

Abstract: A blade in the fan wheel of a diagonal-flow fan, which blade should ideally have the contoured shape of a twisted double-curvature or undevelopable surface, is formed from a portion of a plate which has a flat planar surface. To develope the flat blade shape from a planar surface, lines of intersection between a plate and the streamsurfaces in the ideal fan wheel, which are represented by a number of coaxial imaginary conical surfaces, are used as a basis for design. The realized flat blade can then be orientated between the frustoconical main and side plates to form a diagonal-flow path similar in performance to the ideal blade of a twisted double-curvature surface.

Abstract: A propeller or impeller construction having a plurality of blades mounted on a hub section. The blades are essentially triangular in cross section and are hollow to achieve light-weight and permit center air flow. In addition, the blades may be tapered in such manner that accelerated internal air movement with compression toward the tip ends is enabled. The tip portions of the blades may be vented to provide for air flow through the center and out of the tips, and also the rear structural plate may be vented to the low pressure side of the blades. Blade construction may provide for variations in the pitch angle. The blades are mounted on the hub section by a unique construction which may provide both commonality and interchangeability of parts. This construction also enables the use of shims to facilitate balancing and to change and/or adjust thrust characteristics without changing blades.

Abstract: An automotive cooling fan having flexible, resilient blades which decamber with increasing rotational speed of the fan, the general curvature of the blades being formed by a multiplicity of spaced, generally radially extending bends in the blades; in preferred embodiments the blades have configuration resulting from said bends in which the general radius of blade curvature of the blades increases and the chord angle of the blades decreases from the blade roots to the blade tips.

Abstract: A sheet metal fan exhibiting special utility as a radiator fan for an internal combustion engine. A spider carries the blades on its arms, the arms each having a radially extending stiffening rib in opposed relation to a complementary rib in its blade to thereby form a tube where the stiffening ribs are radially coextensive. The stiffening rib on each blade intersects a continuous, blade stiffening channel.

Abstract: A flexible fan blade construction of the type wherein a decamber limiter is carried by each spider arm and bears against one side of its associated fan blade to thereby limit flexing (decamber) thereof. According to this invention, the decamber limiter terminates short of the heel of each fan blade. High stress concentrations due to contact between the heel edge of each fan blade and its associated decamber limiter are avoided by this novel construction.

Abstract: A sheet metal fan exhibiting special utility as a radiator fan for an internal combustion engine. A spider carries the blades on its arms, the arms each having a radially extending stiffening rib in opposed relation to a complementary rib in its blade to thereby form a tube where the stiffening ribs are radially coextensive. The stiffening rib on each blade intersects a continuous, blade stiffening channel.

Abstract: A brake device for retarding linear and rotative movement of a load carrying unit after ejection from an in-flight projectile, wherein a container encloses the unit and includes a plurality of slits which divide the container into sections. Each section includes a concave end portion which pivots into a position for retarding movement of the unit responsive to movement of the container through the atmosphere.

Abstract: A flexible bladed automotive cooling fan comprising biasing members biasing both the upstream and downstream sides of th blades including a root portion of the upstream biasing member extending beyond the remainder of both biasing members, the blade thereby having a substantially increased natural frequency and a reduced amplitude of vibration at resonance as well as an improved airfoil configuration.

Abstract: A sheet metal fan blade of improved performance and efficiency has a varying camber angle and chord angle along radial positions of the blade, such that the angle of attack along at least 70% of the length of the blade is not less than 2.degree. or more than 10.degree.. The fan blade construction exhibits utility in an automotive radiator cooling system.

Abstract: A method of making a sheet metal fan blade having a flattened mounting pad. The blade is to be attached to a flat spider arm of a fan hub. According to the method, a fan blade blank workpiece of cylindrical stock and of any desired outline (such as rectangular, trapezoidal, etc.) is simultaneously provided with a longitudinally running rib and a flat pad portion by stamping. In this manner, the outline of the blade is not distorted by stamping the cylindrical blank to form the flat mounting pad.

Abstract: A rotary electric machine comprising a housing containing therein several parts which are to be heated during operation of the machine, and a centrifugal cooling fan for producing an air circulation through the housing so as to cool the heated parts. The cooling fan is made of a disc-shaped metal plate having on its periphery a plurality of fan blades each formed by bending a radially outer portion of the metal plate upstandingly with respect to the surface thereof, and a plurality of notches each defined between the adjacent fan blades. A backing disc-plate is disposed at the back side of the cooling fan in a manner to block therewith the notches, thereby preventing an air from passing through the notches in an opposite direction from an ordinary air flow passing through the housing. The disc-plate and the cooling fan are disposed to define a small clearance therebetween for preventing rattling noises from being produced during rotation of the cooling fan due to an occasional vibratory contact therebetween.

Abstract: To improve the reliability of a fan blade to provide forced cooling to automotive-type alternators, while retaining the advantages of compact construction and inexpensive manufacture, a disk-shaped element is formed with a central opening to receive the shaft of the alternator having fan blades at the periphery thereof, and which further is so shaped and formed that the central region is axially (with respect to the shaft) offset from the major plane of the disk-shaped fan blade, clamping washers being placed against the offset region, one washer spanning the concave portion of the offset portion and the other washer fitting within the concave portion of the offset.

Abstract: The field stirrer herein has an upwardly concave pan shape and is formed as a sheet metal stamping. It has a central planar section and a surrounding section comprising a plurality of circumferentially arranged segments with planar surfaces, the segments being shaped like equilateral trapezoids. The surrounding section has three circumferentially spaced segment groups in which the individual segments thereof slope upwardly at an angle of approximately 45.degree. relative to the planar section. Each of the segment groups includes at least three of the segments which are laterally joined by folded edges. There are also three individually mounted segments arranged alternately relative to the three segment groups which slope upwardly at an angle of approximately 27.degree. relative to the central planar section. At least one segment in each segment group has a rectangularly shaped opening with a rectangularly shaped flap extending vertically downwardly from the upper edge of said opening.

Abstract: A radiator cooling fan assembly is disclosed for use in trucks and other large vehicles. The heavy duty assembly includes a pair of hubs having radially extending arms with blades extending between aligned pairs of hub arms. The arms of one hub are substantially shorter than the arms of the other hub. In addition, the either hub may include either an enlarged aperture in its central portion or webbing between its arms or both.

Abstract: A fan blade and root assembly is disclosed for use in a hot gas engine requiring low weight and high efficiency. The root construction facilitates simple sheet metal stamping fabrication throughout the blade, root, and hub while permitting an air foil shape to be imported to the blade.

Abstract: A method of manufacturing a hydraulic torque converter impeller member and the product of such manufacture in which a hardened steel cylindrical bearing is assembled to a drawn hub portion of a generally annular sheet metal part to comprise a torque converter impeller comprising the steps of (1) semidrawing the part to include a partly drawn hub portion, (2) placing a hardened cylindrical bearing in a die mechanism, (3) assembling the generally annular part into the die mechanism with the hub portion engaged in the cylindrical bearing (4) drawing and extruding the hub by moving an object the size of the desired finished inside diameter of the hub through same whereby the hub is formed and forced against the bearing member with sufficient force to make a permanent connection between the hub and bearing, and (5) trimming the excess material from the outer end of the hub portion to conform same to the dimensions of the cylindrical bearing.

Abstract: A fan blade mounting employing two integral workpieces formed of sheet metal, each having a central hub portion and radially extending arms, the sheet metal arms of each are centrally bulged or ribbed in the region where they join the hub, the ribs facing in opposite directions to form a cavity in each two-part arm. The central hub portion of each workpiece is depressed from the plane of its arms, the hub portions being nested. Each spider arm is thus stiffened by the compressive loading within one rib when a transverse force is applied on the opposite arm.

Abstract: A fan blade, secured to an arm of the fan, extends radially outwardly beyond the arm and is secured to the arm by a plurality of rivets, a continuous circular rib being formed about the radially outermost rivet, the rib comprising on one side of the blade a groove having a depth and a cross-sectional radius equal to the blade material thickness.

Abstract: An improved radiator cooling fan has a substantially planar mounting hub and individually twisted blades extending radially therefrom. Each blade includes reinforcing edges along a portion thereof to enhance durability and lengthen useful service life.

Abstract: A helical blade is provided for a mixing or conveying apparatus which can be used for heating or cooling or in general effecting a thermal treatment such as drying, evaporating calcining or crystallizing a product fed to the apparatus. The blade comprises a pair of pressed ring shaped discs welded together. One disc is shaped with its inner margin curved into or nearly into the axial direction, and the other disc is welded to it at its inner and outer margins. The blade may be welded directly to a shaft, mounted freely thereon or welded to blocks on the shaft to provided spaces between the flights of the blade and the shaft.

Abstract: A flexible bladed fan comprising blade assemblies having a reinforcing member contacting each blade along the leading portion thereof, the blade and reinforcing member spaced apart at a gap behind the leading portion and contacting again at a second position behind the gap, the reinforcing member biasing the blade in a downstream direction at the second position.