Abstract: A panoramic periscope having a ray path for the visual observation of objects and having a central tube with an ocular or eyepiece disposed laterally thereon, the central tube being provided with a system of lenses, prisms and mirrors and having a peripheral viewing window which is mounted so as to be rotatable about the longitudinal axis of the central tube through 360.degree.

Abstract: In a stranding machine system with a single lay and take up device for the rope a take up coil (5) is provided and a single lay rotor (7) which rotates and encompasses the take up coil are coaxially disposed. The take up coil and the single lay rotor are moveable reciprocally relative to each other for generating a lay stroke for the rope in an axial direction and the rope is fed from the longitudinal axis of the single lay rotor along the same to the take up coil. For taking up a difference of the speeds is generated for the take up coil and the single lay rotor depending from the given obtained take up diameter of the take up coil. The take up coil with the nominal speed and the single lay rotor for generating the required speed for the differential speed are separately rotatably driven. Thereby, the take up roller may be mounted stationary free floating in axial direction and the single lay hollow rotor member may also be free floating mounted but reciprocally driven in axial direction.

Abstract: In such a device, with a rotor support frame and a drafting wheel mounted transversely of its axis of rotation, the effects of the gyroscopic and centrifugal forces on the rotor support frame should be avoided so far as possible. For this, an oppositely-driven rotary member (13) is mounted on the axis of rotation (12) of the drafting wheel (10). The shape, dimensions, masses and/or velocities of rotation of the drafting wheel (10) and the rotary member (13), as well as the parts (26,25,14,27,28; 34,33,15,35,36) rotating with them, are selected so that the product of the mass moment of inertia and the angular velocity of the counter-rotating components is at least approximately uniform in magnitude. The drafting wheel (10) and the rotary member (13) are each mounted upon the common axis of rotation (12) by means of a hollow shaft (28,36).