Abstract: Systems and methods for implementing an absolute encoder are disclosed. A system can include a plurality of tracks, each having a plurality of track elements. Track elements for at least one of the tracks are configured with a nonlinear modulation, such that an absolute position can be determined without requiring a reference marker.

Abstract: Systems and methods for implementing an absolute encoder are disclosed. A system can include a plurality of tracks, each having a plurality of track elements. Track elements for at least one of the tracks are configured with a nonlinear modulation, such that an absolute position can be determined without requiring a reference marker.

Abstract: A resolver for measuring or detecting the angular positions of a shaft is characterized by the fact that the stator (1,2) carries all windings, i.e. the exciting, winding (3) and the measurement winding (4), whereas the rotor (5) comprises a purely mechanical structure. The rotor carries at its circumference polar surfaces having different polarities that cooperate with the stator windings. The polar surfaces (6,7) are designed in such a way that they have in each angular position of the rotor a reluctance that is specific to that position. This resolver with an extremely simple design allows very precise measurements to be carried out.

Abstract: A rotary resolver having a stator housing with electromagnetic coils and a permanent magnetic rotor rotatable therein is improved to provide a resolver system with more precise angular rotor position readings. Interacting system features include a ring of soft magnetic material interposed between north and south magnetic pole structure on the rotor, which is enhanced in performance by a particular one of the soft magnetic materials RSi 24, RNi 8 and RNi 5. Adjustable compensation coil structure in the stator housing interacting with the rotor flux pattern obtains more precise angular readings in different working locations. A digital control system dynamically processes flux compensation information. Resolver units may be positioned at an end of a rotating shaft in a working position for detecting the angular rotation position of the shaft.

Abstract: The synchronous motor includes at its rotor a thin-walled cylindrical cup member. This cup member includes at its outer side a plurality of rings which are electrically insulated against each other. A plurality of rod shpaed permanent magnets are in turn arranged at the surface of the rings and extend parallel to the rotor axis. Preferably a braking unit is located at the inside between the inner side of the cup and the rotor shaft which unit act as a standstill brake.

Abstract: To produce an integrated coupling on pipes manufactured according to the centrifugal casting process, insert rings made of soft PVC are placed into the end parts of the pipe shell mode. In the recess (5a) of one end part (4a), a coupling sleeve (7) is produced by wrapping on a laminate. A recess (5b) provided with an additional annular groove (5c) is produced by the insert ring in the other pipe end part (4b). A prestressed sealing ring (8) is placed into the groove (5c). Projecting beads (8a, 8b) of the sealing ring (8) are compressed by the coupling sleeve (7) on coupling the pipes. The material of the sealing ring (8) that is now being displaced finds space in annular flutes (8d) provided on the inner side of the sealing ring. This integrated coupling is suitable for nonpressurized pipelines and especially for pipes intended for lining reinforced concrete or concrete pipes.

Abstract: A spigot and socket connection of the type which comprises a pipe end held within a socket by means of a retaining ring includes a device for securing the connection against sliding of the components. This device comprises a sleeve-like securing element lying between the pipe end and the retaining ring. The securing element carries an abutment which is engaged by the retaining ring, and the element is securely clamped to the external surface of the pipe end.

Abstract: A coupling for sealing two tubes together in end-to-end sealing engagement, comprises an outer tubular sleeve having an interior bore with a plurality of radially extending grooves therein at spaced axial locations and an inner tubular seal arranged within the outer tubular sleeve and having an exterior wall with radially outwardly extending ribs which engage into the respective grooves. The seal has an interior bore with an entrance diameter at each end at least as large as the tubes to be joined or larger so as to have an inwardly tapered entrance. The seal includes a bore wall defining a compression flange with an inwardly, gradually tapering wall adjacent each entrance which tapers inwardly in an axial direction for diameters substantially smaller than the tube. The compression flange also includes an opposite steeply tapering wall which extends in an axial opposite direction to the gradually tapering wall.