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 commutator of the arch-thrust type and process for its production, wherein at least one annular slot is provided in its segment set which is located concentrically to the longitudinal axis of the commutator and into which an armoring ring is placed which is under tension. In order to be able to produce the commutator in a cost-effective manner in spite of a high dynamic and thermal load capability, the segments are provided with punches forming the annular slots. The boundary surface of the annular slot which serves as a support of the armoring ring defines a polygon and is maintaining the insulation using molded plastic or air between the segments which are separated by insulation material radial outwardly of the annular slot.

Abstract: A method and apparatus for producing laminated iron cores wherein a new skew angle .DELTA..theta. is calculated when the total thickness of core sheets in a laminated iron core currently being produced reaches a predetermined value L.sub.o, or during a time period after the number of such laminated core sheets reaches a predetermined value n.sub.A before the total thickness reaches the predetermined value L.sub.o, so that a skewing operation for laminated iron core to be next made is carried out on the basis of the new skew angle .DELTA..theta..

Abstract: A method of pre-mounting an anchorage device such as a spike into a concrete object said anchorage device being adapted for fastening the object onto a support surface. The method includes the steps of moulding and vibrating the object (1) in a mould, there being formed a guide recess (4) in the object and the object is being removed from the mould prior to curing the concrete.According to the invention there is formed, during the casting of the concrete object (1), a channel (5) extending from a location centrally of the bottom of the guide recess (4), practically through the object and to a location adjacent that surface of the object turned away from the guide recess. Then the object is removed from the mould and the concrete is cured. On forming the channel, this is given a tapering portion (8, 9) at the end thereof facing away from the guide recess and an approximately uniformly thick portion at the end thereof closest to the guide recess.

Abstract: Method for tightly jointing a sleeve to a submarine pipe laid on a very deep sea-bottom, characterized by the preliminary stages of providing a series of grooves on the inside surface of the sleeve, and of filling each one of said grooves with two half-rings made of a material collapsible under high pressures up to a 70% variation of its volume. A type of such a material is moreover described.

Abstract: A method for constructing furniture is used to attach a flexible sheet portion in a state of tension to a support structure. The support structure includes first and second spaced-apart longitudinal bars having a plurality of studs and a plurality of cross braces, each cross brace having stud engaging apertures proximate first and second ends. Initially, the bars are attached to the flexible sheet with the studs projecting through the sheet. A first cross brace is attached to a first bar by inserting a first stud of the first bar through an aperture of the cross brace. A tool having a handle portion, a shank portion and a distal end portion with a stud engaging recess is inserted through a second aperture of the first cross brace. A second stud of the second bar is engaged by the recess of the distal end portion and the tool is tilted away from the center of the sheet, placing the sheet in tension, while the cross brace is slid down the shank of the tool against the sheet and the second bar.

Abstract: A method of assembling a dynamoelectric machine (an electric motor) is disclosed in which a rotor tool is inserted into the stator bore with the tool having an outer diameter substantially equal to or slightly less than the minimum allowable inner diameter of the stator bore. The tool further has a central pin which is inserted into the bearing bore of the motor bearing support or end shield. Portions of the end shield are disposed on the outside of the stator core when the end shield and the stator core are in their desired assembled positions. Then, these portions of the end shield are magnetically deformed inwardly, as by magnetic pulse forming or the like, for positively securing the end shield to the stator core such that the rotor tool maintains alignment of the bearing bore with respect to the stator bore.

Abstract: This invention involves methods and apparatus relating to the assembly and structure of a dot matrix print head. The invention includes a single unit, coil assembly of a bobbin, coil, and clapper which can be removeably placed as a unit among fixed pole pieces and yoke members in the print head. The print head also includes a supporting arrangement for the coil assemblies which automatically aligns the clapper of each coil assembly with the impact end of one of the print wires during the assembly of the print head. Other disclosed features of the invention are novel designs for the wire guide members, a heat sink member, and mounting structure by which the print head is attached to the main guide and rail guide bearings of the printing mechanism.

Abstract: A disk armature for an electric, in-tank fuel pump motor is manufactured by laser welding a pair of annular disks in two concentric circles of spot welds, one near each of the inner and outer circumferences of the disks. One disk is made of malleable copper for the forming of commutator hooks and studs; the other is made of hardened copper alumina for superior wear characteristics in a sour gasoline environment. The welded disks are affixed to an insulating support and cut into segments, each having at least one weld from the inner circle and two from the outer circle. Thus the segments are each securely welded without deformation or degredation of the superior wear properties of the copper alumina disk.

Abstract: While the leading end of a first heated workpiece is processed in a rolling mill, the trailing end is joined to the leading end of a second heated workpiece. End portions of the workpieces at the gap therebetween are held by clamp members at a spaced-apart location so that both workpieces advance at the same speed toward the rolling mill. The end portions of the workpieces are cleaned to remove scale and then a mold is positioned to span the gap and contact the end parts of the workpieces. Liquid-weld metal is introduced into the mold and allowed to at least partially solidify before the mold is removed while the rolling operation continues. The weld metal substantially solidifies and is passed through the rolling mill.

Abstract: Apparatus for force fitting components into a workpiece comprises a gantry supporting two insertion heads above an indexable support for the workpiece, a workpiece pick-up station on each side of the workpiece, and rods by which the insertion heads are suspended from the gantry and which are rotatable to translate the insertion heads between positions over the pick-up stations and positions over the workpiece and to operate tooling of the insertion heads to pick-up components from the pick-up station and to force fit them into the workpiece. The apparatus is programmed so that when one of the insertion heads is located over a pick-up station the other is located over the workpiece.

Abstract: This machine essentially comprises: a contact-pin feeding head which drives contact-pins through holes in the adaptor having a pair of frames made fast with each other, but mutually movable, each of which carry one of two parallel superimposed perforated plates. The relative mobility of the two frames, and accordingly of the two adaptor plates, enables alignment, as the case may be during the step of inserting each contact-pin, of two homologous holes along the vertical line through the contact-pin feeding head. The various steps are controlled by a processor which has the configurations of the holes formed in the two plates, respectively, stored therein.

Abstract: A solar concentrator of substantially parabolic shape is formed by preforming a sheet of highly reflective material into an arcuate section having opposed longitudinal edges and having a predetermined radius of curvature and applying a force to at least one of the opposed edges of the section to move the edges toward each other and into a predetermined substantially parabolic configuration and then supporting it.

Abstract: An improved magnetic core element for use in an electrodynamic rotary machine, and the method of making such a core element are disclosed. The core element, either a stator or rotor depending upon the design of the machine, is provided with a slot distribution such that when the rotor rotates with respect to the stator and a balanced energy field is provided therebetween, at least the lowest generated harmonics, will be substantially zero.

Abstract: Apparatus for installing connectors on flat cables comprises an applicator having an application zone and a staging zone which is adjacent to the application zone. A turntable is provided in the staging zone which has a connector-receiving recess. Connectors are delivered to the recess and the turntable is rotated to align the connector with a guide track that extends to the application zone. Connectors can be selectively aligned in either of two possible orientations. The connectors are attached to an endless belt which is advanced during each cycle to deliver connectors to the turntable.

Abstract: A method of making prototype vehicles by first building a skeletal body of interlocking substantially rigid templates on a frame. The frame is built of tubing members and panels to precise specifications and is fitted with wheels to facilitate transporting the prototype. The templates are then traced on polystyrene foam pattern pieces which are sized to fill the spaces between the templates. The pattern pieces are then attached to the frame and shaped to the design contour surface. The surface is then removed to a predetermined depth in two steps and filled with a hardenable material, such as an epoxy resin based pliable material. After the hardenable material cures, the prototype is surface sanded, primed, painted and fitted with trim pieces and hardware.

Abstract: A method of forming one end of a sidepocket mandrel into a tubular shape having an internal diameter large enough to receive an orienting sleeve, moving an orienting sleeve through the formed end, securing the sleeve to the mandrel, and reforming said end for reducing the internal diameter of the end sufficiently to form a premium female thread therein. The method of making an integrally formed sidepocket mandrel having a one-piece body with a main bore and an offset bore. Both ends are formed into tubular shapes while leaving a middle section unworked whereby the middle section forms a main bore and an offset bore. The tubular ends are reduced in size and shaped to form thickened walls which are aligned at the opposite ends of the main bore. During forming, one end, such as the bottom, is formed approximately sized for receiving thread, and the other end, preferably the top, is formed with an internal diameter sized to pass an orienting sleeve.

Abstract: A method is disclosed of using a robot with a single fixture to install a headliner in a vehicle body on an assembly line wherein both the configuration of the vehicle body and the material and/or color as well as the configuration of the headliner vary and are combined at an assembly station.

Abstract: A method for producing a nondirectional pen includes the steps of drawing a metal pipe to form a pen blank having three or more radial blade sections extending along the length of the pen blank and equally spaced angularly away from one another, each of the radial blade sections including an internal gap extending along the length of that blade section; cutting the pen blank into pen bodies having a predetermined length; shaping the forward end of each of the pen bodies into a substantially conical configuration; slotting the pen body from its tip to form longitudinal slots each aligning with the internal gap of the corresponding radial blade section; and providing a hard pen point capable of writing.

Abstract: A method for producing a nondirectional pen includes the steps of drawing a solid metal rod to form a pen blank having three or more radial blade sections extending along the length of the pen blank and equally spaced angularly away from one another; cutting the pen blank into pen bodies having a predetermined length; shaping the forward end of each of the pen bodies into a substantially conical configuration; welding a pen point ball to the tip of the pen body; slotting the pen body from its tip to a predetermined depth through the pen point ball to form longitudinal slots; and plastically deforming the pen body to close the slots.