Abstract: A method for manufacturing ball bearings and a sintered metal outer race preform for use therein in which the method comprises the steps of forming a generally annular sintered metal outer race preform, the preform preferably having a composition of a 97-99.4% iron and 0.60 to 1.00% carbon; the preform being fabricated from sintered metal powder and having a sinter density of approximately 6.1 to 6.

Abstract: A method of making a heat exchanger consisting of a conduit having a plurality of passes joined by integral return bends which comprisesI. stacking at least three pairs of strips of material together so that each pair of strips is displaced laterally with respect to an adjacent pair of strips,Ii. bonding the strips together to form a flat, serpentine conduit, andIii. inflating the conduit by applying internally a fluid under pressure.

Abstract: A spherical bearing assembly having an inner race member and an outer race member, the inner surface of the outer race member being a concave spherical surface, the outer surface of the inner member being a complementary convex spherical surface, the inner member including a spool member and at least three spherical segments interlocked, in an axial direction, on the spool member.

Abstract: An elongated unhardened blank is passed between a first pair of rollers where it is conductively heated by supplying current to one of the rollers. Thereafter, the blank is further heated by induction and then passed between a second pair of rollers where it is shaped so as to impart thereto a predetermined cross-sectional configuration. The rollers of the second pair are profiled and the blank is maintained at an elevated temperature by supplying current to one of the rollers. After shaping, the blank is passed between a third pair of rollers. Current is again supplied to one of these rollers. The other roller is of a diameter corresponding to that desired for the finished annular articles and the blank is coiled about this roller. This latter roller is partially immersed in a quenching medium so that the blank is quenched and thereby hardened as it is being coiled. Coiling is continued until the number of convolutions corresponds to the number of annular articles which are to be produced.

Abstract: Gas carburizing of a briquetted powder metal preform prior to hot forging of the preform to acquire a fully dense, carburized powdered metal part.

Abstract: A preloaded tie rod end assembly for a motor vehicle steering system and a method for making the assembly is disclosed. The tie rod end is made by positioning the ball of a ball stud against a pair of frangible bearings within the socket portion of a tie rod end housing. A plastically deformable element is also situated within the housing. A closure member for the housing exerts a force against the bearings during the assembly operation and causes each bearing to fracture into circumferentially spaced bearing pieces. After the tie rod end is assembled, an axial load is placed upon the ball stud which is transferred to the deformable element thereby causing it to deform. The element is deformed to the extent necessary to bring the frictional resistance to rotation of the ball stud about its own axis within a prescribed torque range.

Abstract: The invention is concerned with an improved joint between tubing and a flange having a hole therethrough into which the tubing is force-fit. The flange is made of powdered metal by placing the powdered metal and a lubricant in a mold, compressing the powdered metal at a pressure of at least about 4 .times. 10.sup.7 Kg. per sq. meter, removing the resulting flange from the mold, initially heaing it in an inert or reducing gas atmosphere to remove the lubricant, heating it further at a higher temperature to cause intermetallic bonding thereof, cooling it to a temperature below about 100.degree.C and dry machining annular channels into the hole in the resulting flange. The joint is formed by placing the tubing within the hole and expanding the tubing outwardly into the channels which extend from the hole. The resulting joint has a much higher resistance to torque than does a similar joint made between tubing and a machined flange of similar or even greater hardness.

Abstract: Tin coated steel sheet used for seamless steel containers by applying of a coating at least one material selected from the group consisting of nickel, cobalt, copper, nickel oxide, cobalt oxide, copper oxide, tin oxide, copper-tin compound, cobalt-copper compound, cobalt-copper compound, cobalt-nickel compound, nickel-copper compound, cobalt-tin compound, nickel-tin compound and nickel-sulfur compound, onto one or both of the surface of cold rolled and cleaned steel strip or sheet. The coated steel strip or sheet is then coated with tin, and the tin coating may then be flow-melted subsequently.

Abstract: A method for producing a core form to be employed in the injection molding of a ball joint bearing which has a spherical bearing surface adapted to encircle the ball of a ball joint resiliently and a plurality of isolated oil retention recesses formed in the bearing surface, comprising the steps of forming a spherical portion corresponding to said bearing surface of the bearing on a core form blank, applying a lead layer onto said spherical portion, removing said lead layer from selected areas of said spherical portion which correspond to said oil retention recesses in the bearing surface to expose the areas, applying a hard chrome plating layer at said exposed areas of the spherical portion to form reliefs which are adapted to form said oil retention recesses in the bearing and removing the remaining portion of said lead layer from the spherical portion.

Abstract: The invention is directed to a device adapted to be inserted within a heat exchanger header of restricted transverse dimensions, for locating tools in operative relationship to each of the apertures in the heat exchanger's tube plate, said device having gripping means to fixedly mount the device within the heat exchanger, means rotatably mounting a portion of the device, a first carriage moveably mounted on said rotatable portion in a direction along the axis of the device, a second carriage mounted on said first carriage and transversely moveable thereto and means on said second carriage for mounting the tools on said second carriage.

Abstract: A method of forming a composite roll which has a hard wear resistant shell and a tough shock resistant arbor. The shell is adhesively affixed to the arbor, thus avoiding a shrink fit which places the shell under tension. The roll is adapted for use in applications where the arbor-shell interface reaches temperatures up to 400.degree.F, and the adhesive must withstand these temperatures without breaking down. The preferred adhesive is a thermosetting epoxy material cured at an elevated temperature with an aromatic diamine.