Abstract: A planetary transmission comprising a planet carrier (6) connected rotationally fast to a driving shaft (3), a planet gear (7) of which planet carrier (6) is simultaneously in mesh with an annulus (9) fixed on a housing (1,2) and with a sun gear (10) connected rotationally fast to a driven shaft (12) arranged concentric with the driving shaft (3), each of the driving shaft (3) and the driven shaft (12) being mounted for rotation relative to the housing (1,2) on at least one bearing (16,17) and outer and inner rings (22,25 31 34) of said bearings (16,17) being seated on bearing seats (5,14,11,15), characterized in that at least one of two bearing seats (5,14,11,15) of each bearing (16,17) comprises at an axial end thereof, a resilient projection (19,24,27,32) engaging by elastic reverse deformation, an end face of the inner or outer bearing ring (22,25,31,34) seated thereon.

Abstract: A planet carrier (6) of a planetary transmission wherein planet gears (7) in mesh with an annulus (9) and a sun gear (10) are mounted on pins (8) which are guided on both sides of the planet gears (7) in lodgings (15,15a) of disk-shaped carrier elements (13,13a) connected to each other, characterized in that the lodgings (15,15a) are made in the form of pockets opening radially outwards to enable radial insertion of the pins (8).

Abstract: In an ultrasonic diagnosis device composed of ultrasonic optical elements arranged to be disposed in a mass of fluid in a container together with the object to be examined in order to image the object in an image plane, a source of incoherent sound radiation for irradiating the object, a condenser lens, an imaging objective and an acoustic energy detector system, the incoherent sound radiation source is composed of a turbulence chamber containing a plurality of particles arranged to move essentially randomly relative to one another, and at least one ultrasonic transmitter for irradiating the particles in the turbulence chamber with coherent ultrasound; the imaging objective is composed of at least two individual lenses of homogeneous material which are arranged in symmetry to one another and each having lens face which faces the other lens and which has an aspherical shape; and the detector system is composed of a linear array of detectors for converting the resulting ultrasound image of the object into elect

Abstract: In an ultrasonic wave transmitter for generating spatially incoherent ultrasonic radiation, which transmitter includes a source of ultrasonic acoustic radiation, there are provided a member holding a fluid medium in a region exposed to the acoustic radiation, a plurality of particles immersed in the medium and having a diameter of the order of magnitude of the wavelength of the acoustic radiation and an acoustic radiation impedance different from that of the medium, and a device for subjecting the particles to an irregular movement in the medium and within the region.