Abstract: Use of compounds in the plastic columnar discotic liquid-crystal phase for transport of electric charges.

Abstract: A linear unit comprises carriage which is arranged longitudinally displaceably in a holder and is driven by a linear motor, the rotor of which is designed as a flexible strip with a tooth structure consisting of magnetic metal. The strip is fixed self-supportingly on the carriage at its two ends and is guided on both sides on the surfaces of the stators of the linear motor bounding the pole gap.

Abstract: A linear unit for handling equipment of industrial production is proposed, the longitudinally displaceably borne tool support (2 and 19) of which is designed as a gear rack of a linear motor (11 to 18 and 22 to 24) serving for driving the support.

Abstract: Robot joint with an electric drive motor (30), a limit switch (36) for a safety shut off of the same, and a sensor (100) for the zero position-scanning of the joint. The limit switch (36) is actuated by annular segment like platform pieces (50) which are securable in different angle positions on a front face of the one robot part (12). For this purpose, a divided support ring (72,74) is provided which is securable in different angle positions independent from the platform pieces (50) and which has a side face (96,98) which influences the sensor (100).

Abstract: A robot joint has a support carrying a rotary robot arm. An electric drive motor is mounted on the support and its drive shaft is coupled to the robot arm by harmonic drive-type reduction gears. The reduction gears include an elastically deformable, externally toothed ring whose elliptical shape is rotated by the drive shaft. The externally toothed ring itself is stationary and is firmly connected to the support by a flexible sleeve provided at its free end with a rigid mounting flange. The annular mounting face of the flange and the opposite mounting face on the support is each provided with radial teeth, preferably in the form of Hirth-type gears, which guarantee an accurate centering of the sleeve and safeguard the same against turning. Preferably, the flange is fastened to the end face of a steel bushing which is pressed into a bore in the support and secured against turning by knurled serrations.