Abstract: The present invention provides a non-rotating wheel disk for the main wheels of conventional wheelchairs. The non-rotating wheel disks shield the spokes from damage and a user's hands from injury. Easily accessible pockets for storing needed materials, catheter bags, and the like, are attached to an outer surface of the non-rotating disk. An exercise device for use from a conventional wheelchair is also provided. The exercise device may be used alone or in combination with the wheel disk of the present invention, which provides additional support for the exercise device.

Abstract: An operator switches over an application and inputs data through a keyboard 1. Each of CRTs 2 and 3 displays the application and the data inputted by the input unit. A control unit 11 executes processing and switchover of the application, executes processing of the input data and the input key from the keyboard 1, and executes display processing on the CRTs 2 and 3.

Abstract: The switch-mode dc power supply includes a series circuit, a rectifier, an output smoothing circuit, detection circuit, an adding circuit, a triangular wave generator and a control signal generator. The series circuit includes a primary winding of a HF transformer, a semiconductor switching element and a current detection unit connected between two output terminals of a rectifier/smoothing circuit. The rectifier is connected to an end of a secondary winding of the HF transformer. The output smoothing circuit is connected between the rectifier and other end of the secondary winding. The detection circuit is connected to a connection point between the rectifier and the output smoothing circuit. The adding circuit is connected between the detection circuit and a connection point between the semiconductor switching element and the current detection unit. The adding circuit has a current mirror and a current detector. The triangular wave generator is connected to the adding circuit.

Abstract: An excavation pit lining consisting of a slit wall of a hardening single-phase slit wall material with an exposed surface on the pit side, and also of vertical support elements placed at a distance in the single-phase slit wall material, whereby the slit wall forms a panel wall between the support elements and where the single-phase slit wall material has at least one water-retentive, lightweight aggregate.

Abstract: A scheme for producing computer generated holograms in which a motion vector of each object to be displayed is detected, objects are classified according to their motions, a hologram fringe pattern for each classified group of objects is calculated separately by image processing stored basic patterns, and a hologram to be displayed is produced by synthesizing all separately calculated hologram fringe patterns. In another aspect, a gaze point of the observer is determined, and a hologram to be displayed is produced by using high resolution hologram fringe patterns for objects located at the gaze point and low resolution hologram fringe patterns for regions other than the gaze point.

Abstract: A valve unit for the evacuation and filling of media, especially liquids, in a system comprising a valve housing (4), at least two valve seats (15), in one of said valve seats there being housed a valve part for evacuation, and in the second of said valve seats there being housed a valve part for filling. The valve part (5) comprises a longitudinal channel (1) and at least two communication holes (3) extending from the longitudinal channel (1) to the valve part's outer surface (20), said channel (1) being provided with a through-flow cut-off (14) which divides the channel into two part channels, a first part-channel (16) and a second part-channel (17), said part-channels (16, 17) each comprising a communication hole (3), and a slide (6) disposed around the valve part (5), said slide (6) having at least one recess (18) on the surface (21) facing towards the valve part (5) and forming at least one closed cavity, said slide (6) being activated by the feeding of a gas or liquid medium to the valve seating.

Abstract: A microkeratome is provided for use in lamellar surgery on the cornea of the eye. The microkeratome includes a base carrying a camshaft for rotation by a cable connected to the shaft. The base also supports a moving blade assembly slidably mounted on an applanator assembly, with the blade being thin and under tension. The moving blade assembly moves above and sidewardly relative to a suction ring. The moving blade assembly is sized to oscillate side-to-side approximately 1 mm. The moving blade assembly is driven by a connecting cable, wherein longitudinal movement of the cable produces responsive longitudinal movement of the frame and blade to cut a flap or disc of a desired configuration.

Abstract: Disclosed is a method of manufacturing a machine component of sintered ferriferous composite comprising an outer part and an inner part which is fitted into a hole of the outer part. It has the steps of: preparing one of the outer part and the inner part as a green compact of ferriferous powdered metal and the other as one of a green compact of ferriferous powdered metal, a sintered compact of ferriferous powdered metal and a mass of ferriferous molten metal; inserting the inner part into the hole of the outer part; and sintering the outer part and the inner part to bond the outer part and the inner part. The outer part and the inner part are prepared to have a fitting clearance of approximately -100 to +5 .mu.m.

Abstract: Hitch for interconnecting a tractor to a towed implement such as a sprayer, operated by a power takeoff (PTO) of the tractor. The hitch has a turning axis located close to the front of the implement, and a universal joint in the PTO shall be in vertical alignment with the turning axis. The towed implement thus more nearly tracks the tractor in turn, and the universal joint undergoes less vibration and thrust loading during turns.

Abstract: Apparatus for feeding of paint balls to the breech of a paint ball gun. Paint balls are received in pockets around the periphery of a carrier. Rotation of the carrier moves the paint balls into contact with a guide assembly. The guide assembly, which comprises a guide bar and a squash plate, move the paint balls from the pockets and into an outlet of the apparatus. In a preferred embodiment, a guide disc is mounted above the carrier, the guide disc having a plurality of guide openings which are aligned above the pockets.

Abstract: A hydropneumatic suspension system, particularly for wheel support in motor vehicles, with at least one spring arrangement (1, 2) having at least one hydraulic spring strut (4), at least one hydropneumatic spring reservoir (6) and at least one damping valve (8). The spring strut (4) includes a cylinder (10) containing a hydraulic medium, and a piston (12), movably guided therein for spring compression and rebound. The piston (12) separates a cylinder space (16) from an annular space (18) surrounding a piston rod (14), wherein the cylinder space (16) is connected via a damping valve (8) with the spring reservoir (6) for producing an elastic force. The annular space (18) of the spring strut (4) is directly connected, while circumventing the damping valve (8), with the respective spring reservoir (6).

Abstract: A method and composition for the remediation of environmental contaminants in soil, sediment, aquifer material or water wherein contaminants are first reduced with a reducing agent found in sediment and are then oxidized to environmentally safe products. The composition includes a reducing agent, solubilized from sediment by a solvent, for reduction of environmental contaminants such as nitroorganics, halogenated hydrocarbons, cyano compounds, anisoles and metals.

Abstract: A manner of mounting optical elements in the front plate of an alternating traffic sign makes possible an easily-cleaned, flat or smooth outer surface and guarantees an exact alignment of all lens elements with simultaneous sealing. An optics housing is pressed into a hole of the front plate constricted by a lens element so that the hole constriction is embedded by plastic material deformation and results in a form-fit, exact, tight and permanent connection. Additionally, a tool for the precise production of the installation holes is presented.

Abstract: Apparatus for testing electrical bonds of a semiconductor device includes a cantilever arm (14a) with a test head (16) mounted thereon. The test head (16) is biased by the arm (14a) against a base plate (11), but can be moved away from the base plate (11) by an air bearing (22) to ensure substantially frictionless initial positioning. Sensing means (32;34) for sensing contact with a semiconductor substrate are also disclosed.

Abstract: A scheme for depositing a private key used in the RSA cryptosystem which is capable of maintaining the private key more safely, without requiring a user to always carry around a storage medium. In this scheme, a private key of a user is divided into a first partial private key and a second partial private key at a user's entity, where the first partial private key is set to be maintained at the user's entity, while the second partial private key is deposited from the user's entity to the other entity. Then, the second partial private key is delivered from the other entity to the user's entity in response to a request from the user's entity, and the first partial private key maintained at the user's entity and the second partial private key delivered from the other entity are composed so as to obtain the private key to be used in a processing according to the RSA cryptosystem at the user's entity. This scheme can be generalized to a case of dividing the private key into a plurality of partial private keys.

Abstract: A hydroforming process for forming a component from an elongate tubular blank comprised of a deformable metal, the process including placing the blank in a die and sealing opposed ends of the tubular blank, heating the blank to a predetermined deformation temperature which is greater than 350.degree. C. but less than the melting point of the metal, supplying a gas at a predetermined pressure to the interior of the sealed tubular blank to cause deformation of said tubular blank at predetermined regions by drawing/stretching of the metal.

Abstract: A dry and crush treating apparatus using a jet burner, includes: a jet burner drying an oil-containing or/and water-containing raw material; a dry treating tank; and a recovering unit recovering a dried fine particles made of the raw material. In the construction, the recovering unit is installed within the dry treating tank.

Abstract: A pattern recognition scheme using probabilistic models that are capable of reducing a calculation cost for the output probability while improving a recognition performance even when a number of mixture component distributions of respective states is small, by arranging distributions with low calculation cost and high expressive power as the mixture component distribution. In this pattern recognition scheme, a probability of each probabilistic model expressing features of each recognition category with respect to each input feature vector derived from each input signal is calculated, where the probabilistic model represents a feature parameter subspace in which feature vectors of each recognition category exist and the feature parameter subspace is expressed by using mixture distributions of one-dimensional discrete distributions with arbitrary distribution shapes which are arranged in respective dimensions.