Abstract: The aim of the invention is to improve inline skates so as to provide stability during skating, good acceleration, and added skating fun by having the skates turn more or less in accordance with the tilting angle. Said aim is achieved by a rolling device in which the rollers that are arranged largely one behind another are rotatably mounted in individual roller supports, the roller supports are pivotally attached to the chassis by means of inclined shafts, and the rollers are disposed in a laterally offset manner relative to the center line. In a simple embodiment depicted in FIGS. 4a and b, the steering unit is composed of two respective rollers (2) which are mounted in a rocker-type roller support (3?) in an offset manner relative to one another by a distance (9). The roller support (3?) is pivotally attached to the chassis (not depicted) by means of a shaft (8) which extends at an angle ? relative to the horizontal line.

Abstract: The two skates steered by leaning sideways normally curve along circles of similar curvature. As the two circles are offset by the legs' distance they intersect. In order to avoid this disadvantage it is desirable that the outer leg's curved track has a larger radius than the inner leg's curved track. Using lean-controlled steered skates with tiltable wheels comprising a parallelogram closed fourbar linkage including two horizontal cross-guides the purpose is achieved by affixing the two cross-guides rotatably to extensions of the frame in such a way that the vertical projection of the rotation axis makes a solid angle with the vertical projection of the pivot axes of the closed fourbar linkage.

Abstract: The two skates steered by leaning sideways normally curve along circles of similar curvature. As the two circles are offset by the legs' distance they intersect. In order to avoid this disadvantage it is desirable that the outer leg's curved track has a larger radius than the inner leg's curved track. Using lean-controlled steered skates with tiltable wheels comprising a parallelogram fourfold linked chain including two horizontal cross-guides the purpose is achieved by affixing the two cross-guides rotatably to extensions of the frame in such a way that the rotation axis makes a solid angle with the vertical middle plane.

Abstract: A rolling device comprises a wheel pair, consisting of two wheels (3a, 3b)affixed to wheel-holders (4a, 4b), which are interconnected by two cross-guides (5, 6) thus forming a parallelogram link chain. One cross-guide (5) is rotatably secured to extension of the platform providing an acute angle between a rotation axis (9a) and the pivot axes (7a, 7b, 7c, 7d) of the four links which constitute the parallelogram link chain. The second cross-guide (6) is secured at the platform extension using a universal joint. One such tilt-steering wheel pair mechanism together with at least one fixed wheel is attached at opposite ends of the rolling device to make it work.

Abstract: Rolling devices such as roller skates, skateboards, rolling skis, and scooters are known which steer by tilt, but either the wheels do not tilt, or the mechanism is of complex design, or the wheels shift sideways upon tilt. A rolling device shall have tilt-steering wheels which tilt with the device, and which stay in the middle of the platform when steering, and which are cheaply manufactured. This invention comprises a wheel pair, consisting of two wheels 3a, 3b affixed to wheel-holders 4a, 4b, which are interconnected by two cross-guides 5, 6 thus forming a parallelogrammic link chain. The two cross-guides 5, 6 swivel having their swivel axes 9a, 9b oriented parallel to each other providing an angle between the set of swivel axes 9a, 9b and the set of pivot axes 7a, 7b, 7c, 7d of the four links which constitute the chain. The cross-guides are fixed at the device platform using three universal joints.

Abstract: A beam guiding optical system for laser radiation, especially for the radiation of a medical laser, for the continuous adjustment of focal length is described, which is distinguished by the fact that aberrations are largely prevented. The beam guiding optical system preferably has a linearly movable carriage with at least two carriage mirrors disposed fixedly with respect to one another, at least one of these carriage mirrors being concavely or convexly curved, and the beam axis of the entry beam falling on a mirror being parallel to the beam axis of the beam emerging from the adjusting means. The axis of displacement of the carriage is aligned parallel to the beam axis of the entry and emerging beam. In the beam path outside of the adjusting means there is disposed at least one deflecting mirror which has a curvature complementary to the curvature of the at least one curved carriage mirror.

Abstract: A gas laser has a coolable inner electrode for connection to a radio-frequency power source and a coolable outer electrode that is coaxial with and radially spaced from the inner electrode with an excitation space containing the gas to be excited in the radial space between the inner and outer electrodes. With a view to improving a laser of this type in such a way that excitation at higher power with retention of homogeneous discharge is possible, that gas decomposition is slower, and that any desired liquid coolant can be used regardless of the electrical conditions, the excitation space is radially bounded by two, tubular dielectric bodies which are coaxial with and radially spaced from each other.

Abstract: A gas laser has (1) a reflecting body with a reflecting surface, (2) excitation space structure cooperative with the reflecting body for defining an excitation space which is open opposite the reflecting surface of the reflecting body, (3) devices for lasingly exciting a gas in the excitation space and (4) a mirror assembly. The mirror assembly has a mirror having a reflecting surface facing the opening in the excitation space. A radial flange is about the mirror with the reflecting surface of the mirror on one axial side of the radial flange. At least one spacer and, preferably three, circumferentially-spaced bars project from the excitation space structure and engage the radial flange substantially axially for supporting it at least one of axially slidably and tiltably. Bellows sealingly connect the one axial side of the radial flange to the opening of the excitation space structure and its other axial side to a backplate immovably connected to the spacer bar on the other axial side of the radial flange.

Abstract: The present invention relates to a method and apparatus for the uniform and simultaneous illumination by means of radiation of the interior surfaces of cavities for the purpose of observation and/or irradiation. In particular, such cavities may be not only hollow organ cavities, but also cavities in non-organic objects. The solution provides that the interior of the cavities is filled, at least in part, with a light scattering or dispersing medium and the dispersing medium is caused to shine or scatter light by means of one or a plurality of radiations or scattered light. With the integral irradiation used according to the present invention, two procedures are combined technologically, namely diagnosis and therapy of, for example, carcinoma in organ cavities which have been photosensitized by chemical substances, possibly on the basis of differences in decomposition of cancerous and normal tissue.