Abstract: Adjustable diffusers of the type employed for control of flow of air into or out of a space. The diffusers according to the invention have a louvered face plate and have plural parallel vanes behind the face plate each movable between closed and opened positions. The diffusers have interchangeable control plates which have J-slots to control the vane positions and by substitution of which the directions of rotations of the vanes may be altered. The diffusers are of simplified design as compared with present commercially available diffusers.

Abstract: A fan blade construction for an automobile cooling system. The twist angle of the blade, as measured by the rotation of an imaginary line joining the leading and trailing edges, varies linearly or non-linearly along the length of the blade, the leading edge of the blade is rigid and the trailing edge of the blade is flexible. In another embodiment, the fan blade is resiliently biased against a portion of its mounting arm to inhibit flutter.

Abstract: A turbocharger system. One impeller of the turbocharger is driven by exhaust gas from an internal combustion engine, the other impeller functions as a pump to either compress air or to pump air in order to convey granular material. The impeller wheels are spaced and are mounted at the ends of a common shaft. The shaft is continuously lubricated, the spent lubricant being fed to an oil sump (crankcase). The specific improvement is a pressure bleed passageway between the chamber which receives engine exhaust pressure and the oil exhaust line. The bleed allows a portion of engine exhaust to pass to the sump exhaust line and assist oil flow to the sump by virtue of a pressure differential. This action, in turn, inhibits spent oil from passing through the seals and passing into either or both impellers when oil sump (crankcase) pressure is higher than atmospheric or where there are unfavorable to gravity flow conditions existing in the oil return line.

Abstract: An apparatus and method for determining the response and performance of a torsional vibration damper. Normally aligned optical patterns are placed on an axial face of the hub and on an axial face of the inertia member. Light is projected on and reflected from both the pattern on the hub and the pattern on the inertia member. Displacement of the hub and inertia member and the phase relationship between the displacements is sensed during rotation by reflected light passed to two photocells. The performance of the damper, including its dynamic response, is computed by comparing the outputs of the two photocells and may be read by meters.

Abstract: A shear liquid fan drive assembly for radiator cooling system of an internal combustion engine of the type wherein a temperature responsive valve controls the degree of rotary coupling between the engine and a radiator cooling fan by controlling the quantity of shear liquid between a driving disc and a driven housing carrying the fan. The specific improvement relates to a modification for redirecting flow of shear liquid to inhibit breakdown of the shear liquid due to overheating.

Abstract: A fluid coupling of the type adapted for a fan for an automotive cooling system. A driving disc turns within a housing to which the fan is coupled. One face of the disc carries concentric ridges or lands which are positioned to project into complementary concentric channels carried by the housing, with a shear fluid such as a silicone fluid at least partially filling the concentric channels. Secant grooves extend across the top of the interdigitated ridges of the drive disc and of the housing interior to cause the silicone shear fluid to move generally radially. Such fluid circulation increases the useful life of the shear fluid by inhibiting high temperature build-up thereof.

Abstract: A replaceable tool for attachment to the periphery of an agricultural disc is formed of an inverted U-shaped investment casting which can be fitted over the marginal edge portion of the disc to present parallel leading and trailing faces connecting side surfaces which converge outwardly of the disc, being inclined at different angles relative to the plane of the disc so as to present on one side of said disc a side surface providing clearance for the disc on that side of the disc and the other side surface being at a greater angle which reduces the areas of the end faces of the tool to reduce resistance to passage of the tool through the ground.

Abstract: A device for varying the operating characteristics of a turbocharger. A control ring is adjustably mounted within the turbine exhaust passage, adjacent and partially surrounding the exducer portion of the turbine impeller. Axial movement of the ring relative to the impeller changes the proportion of gas which passes completely through the exducer portion. Exducer flow is thus variably bled, the bled portion of the gases passing over the outer surface of the ring.

Abstract: A fluid-releasable mold for forming shaped ware including a porous mold body comprising at least 70% alumina, up to 15% ball clay and up to 15% talc is disclosed. A mold face is formed on one surface of the mold body and fluid-permeable conduit is provided in communication with a second surface of the mold body with means for sealing the fluid-permeable conduit to the second mold body surface to prevent the escape of fluid from the conduit other than through the mold body and out the mold face. The arrangement obviates the problem of gradual loss of porosity which has heretofore limited the service life of fluid-release molds of alumina, ball clay, and talc.

Abstract: A torsional vibration damper having two inertia members. A first inertia member is coupled to a hub by elastomer. A second inertia member is positioned within an annular cavity and is surrounded by a liquid of high viscosity. Under the influence of torsional vibrations relative movement arises between the hub and first inertia member, the hub and the second inertia member, and the first and second inertia members. The latter relative motion inhibits the attainment of resonance by either of the two inertia members.

Abstract: A torsional vibration damper of the type having a hub adapted to be coupled to a rotary shaft. The hub carries an elastomer member, the elastomer member in turn carrying an inertia member. A cavity is formed at the interface between the hub and inertia members, the cavity filled with a viscous liquid. The elastomer and the viscous liquid damp torsional vibrations in the rotary shaft. By virtue of the configuration of the hub and inertia members, the elastomer also functions to seal the viscous liquid in the cavity. Further, the configuration obviates the need of separate fasteners to assemble the damper.

Abstract: A fan drive structure for the cooling system of an internal combustion engine. A drive disc rotates within a housing cavity having a silicone oil therein. The housing carries a fan. The improvement comprising coating the sides of the drive disc with a polyphenylene sulfide material. The material coating functions as an anti-friction and bearing surface.

Abstract: A workpiece holder assembly for aligning a turbine with a turbine shaft without the requirement of an aligning pin received by the workpieces. The workpiece holder assembly receives the turbine shaft and the turbine. Upon depression of the top of the assembly, as by moving the assembly upward so as to engage an abutment, the interface between an end of the turbine shaft and one face of the turbine is exposed. The assembly is rotated over a full circle while the interface receives a welding beam of electrons. The assembly and abutment may be employed with existing electron beam welding apparatus.

Abstract: Dampers operable by energization of an electrical circuit or by deenergization thereof to open or close, for control of smoke ventilation in case of a fire. The dampers are held closed, or open, either by a magnet or by a spring. The dampers may be used in ventilation systems of any other type.

Abstract: A process for making a file wherein the formation of the file teeth by striking a blank with a chisel-like bit also forms sharp serrations on the back sides of the teeth adjacent the cutting edge, with the improvement of preserving such serrations without substantial removal thereof during the cleaning and finishing steps of such file making process. Such process may include cleaning a formed and hardened file by directing a pressurized stream of frangible glass beads at the file to remove undesired materials associated with the hardening step. The file resulting from such process retains the serrations on the back sides of the teeth whereby wearing away of the original cutting edges of teeth during use serves to expose for cutting purposes some of the sharp serrations.

Abstract: A turbocharger for an internal combustion engine. The turbocharger is coupled to an air-to-air heat exchanger (intercooler) to cool the compressed air just prior to its entry into the engine. The turbocharger has axially spaced turbine, compressor, and fan rotors to thereby preclude undesired mixing of air streams.

Abstract: A torsional vibration damper for internal combustion engines. An annular inertia member is attached to a hub by an annular elastic member assembly having an interleaf. In one embodiment, the interleaf is thicker at the middle than at its ends. In another embodiment the interleaf is thinner at its middle than at its ends. The elastomer is radially deformed at different axial portions. Axial movement of the inertia member relative to the hub is inhibited, as is sliding out of the elastomer from the inertia and hub members.