Abstract: A contactless datalink for transmission of data between a rotatable part and a stationary part, including a dielectric waveguide split into two sections. A first dielectric waveguide section is at the rotatable part and a second dielectric waveguide section is at the stationary part. The first dielectric waveguide section is coupled to a transmitter and the second dielectric waveguide section is coupled to a receiver.

Abstract: A waveguide structure includes a first waveguide section mechanically and electrically connected by a fixed connector to a second waveguide section. The waveguide sections include a dielectric material with a ground layer and a conductor structure with a pair of elongate conductors. The fixed connector includes a dielectric material with a pair of contact pads insulated from a ground layer. The fixed connector is attached by its top side to the bottom sides of interface sections of the waveguides sections forming a ground contact. The interface sections each comprise an intermediate conductor from each of the elongate conductors at the top side to the bottom side of the dielectric material. The intermediate conductors are connected via the contact pads.

Abstract: A slipring with at least one slip ring module having at least one sliding track, and at least one wear indication track. A wear indication circuit is connected to the at least one wear indication track for monitoring electrical properties of the wear indication track and signaling an abnormal slipring condition. A wear indication track may be exposed to higher load, higher rotation speed, higher brush pressure force, or other lifetime-reducing influence as compared to a normal sliding track.

Abstract: A rotary joint includes a first part and a second part configured to rotate around a rotation axis against the first part. The first part has a first magnetic core and a capacitive data link component. The second part has a second magnetic core for coupling power with the a first magnetic core and a second capacitive data link component to transfer data from and/or to the first capacitive data link component. To weaken magnetic stray fields from the magnetic core, a resonant shield is provided outside the airgap between the magnetic cores. The resonant shield comprises an open ring-shaped structure, having two open ends which are connected by a capacitor to form a resonant circuit.

Abstract: A rotary joint includes a first part and a second part configured to rotate around a rotation axis against the first part. The first part has a first magnetic core, a sliding brush, and a capacitive data link component. The second part has a second magnetic core for coupling power with the first magnetic core, a sliding track for galvanic coupling with the sliding brush, and a second capacitive data link component to transfer data from and/or to the first capacitive data link component. To weaken magnetic stray fields from the magnetic core, the rotary joint is a disc-type rotary joint, and the sliding track is arranged radially between the second magnetic core and the second capacitive data link component.

Abstract: A slipring device includes a first part and a second part rotatable against each other. Both parts include housings with slipring components. A first housing at the first part has a hollow shaft with a bayonet lock notch to engage with a locking ring having at least one bayonet lock protrusion. The locking ring can easily be attached by a bayonet lock to lock the first part and the second part together.

Abstract: A brush holder for slipring brushes comprises a brush mount held by a lever at a base. The lever is connected by a base pivot to the base and is pivotable in a plane orthogonal to a brush mount pivot axis and/or to a slipring rotation axis. A spring is provided between the base and the lever. The brush mount is connected to the lever by a brush mount pivot pivotable in said plane. The brush mount holds a first brush and a second brush wherein the brush mount pivot is between the first brush and the second brush.

Abstract: A sliding brush assembly for a slipring includes a sliding brush and an absorbing device containing absorbing material attached to the sliding brush, such that the at least one sliding brush is enclosed by the absorbing material. The absorbing device includes a housing with two (optionally identical) housing parts (each having an elongated base with a snap arm at one side and at the opposing side an opening, into which the snap-arm fits). The housing may easily be closed around a sliding brush by snapping two housing parts together.

Abstract: A slip ring unit comprises a brush block with multiple brushes rotatable against a module with multiple sliding tracks. A position encoder is connected to the brush block and the module, for detecting the relative position between the brush block and the module. An evaluation unit receives signals from the position encoder and generates a position-dependent signal indicating wear. The evaluation unit has multiple wear counters assigned to multiple positions and/or sections of the slip ring. If a movement is detected within a certain section, the related wear counter is incremented to allow to monitor wear at slip rings that are not continuously rotating.

Abstract: A set of rotary joint components containing stationary part(s) and rotatable part(s) repositionable with respect to each other. The stationary part has a stationary base with means for holding a stationary carrier into a circular-shaped form. The stationary carrier holds at least a stationary transmitter coupler of a contactless data link, such as a strip line. The stationary carrier is made of sheet metal or plastic material, and therefore can easily be prepared on a plane work bench before it is bent to a ring shape.

Abstract: A method for manufacture of a gold-plated slipring contact, comprising steps of galvanic deposition of a copper layer on the electrically-conductive substrate; of a nickel and/or nickel phosphor layer on the copper layer; and of a gold layer on the nickel and/or nickel phosphor layer.

Abstract: A rotary joint has a body with an even number of body segments. Each body segment holds one transmission line with one RF signal connector at one end and a termination at the opposing end. The body segments are oriented such, that alternatingly in neighboring segments two RF signal connectors or two terminations are next to each other. Two neighboring body segments are connected by a carrier plate. The carrier plate holds an electronic housing where two RF signal connectors are located next to each other, and provides a connection to the RF signal connectors.

Abstract: A method for making contact wires for sliprings comprising the steps of: coating and/or plating a wire with a first metal of the group of nickel, chrome or a combination thereof; coating and/or plating the wire with a second metal of the group of gold, silver, or a combination thereof; delivering laser radiation and generating an interference pattern of the laser radiation to the surface of the wire; heating the surface selectively as defined by the interference pattern, modifying of the crystal structure and/or providing protrusions and/or recesses due to melting and/or evaporation of the surface material.

Abstract: A CT scanner with a device configured to improve the electromagnetic properties and/or the shielding of the rotation transmission devices in the CT scanner. A corresponding method for improving the electromagnetic properties and/or the shielding, of the rotation transmission devices inserted in the CT scanner.

Abstract: A set of rotary joint components containing stationary part(s) and rotatable part(s) repositionable with respect to each other. The stationary part has a stationary base with means for holding a stationary carrier into a circular-shaped form. The stationary carrier holds at least a stationary transmitter coupler of a contactless data link, such as a strip line. The stationary carrier is made of sheet metal or plastic material, and therefore can easily be prepared on a plane work bench before it is bent to a ring shape.

Abstract: A wire brush for a slipring includes a contact section, from which a stabilizer arm is extending backwards towards the brush block of the slipring. The stabilizer arm holds a friction section, which is in friction contact with the contact section at a friction contact area. Such contact, in operation, generates internal friction within the brush when the brush is moved and, therefore, suppresses oscillations of the brush.

Abstract: A slipring assembly comprises a slipring module having at least one slipring track which is in electrical contact with at least one slipring brush. The slipring module includes an isolating body holding the at least one slipring track. Furthermore a heating element is embedded in the slipring module to generate heat within the slipring module and to increase the temperature of the at least one slipring track. This allows increasing the temperature of the slipring module to an optimum operation temperature and further to remove humidity from the surface of the slipring track.

Abstract: A slipring assembly comprises a slipring module having at least one slipring track, which is in electrical contact with at least one slipring brush. The slipring module comprises an isolating body holding the at least one slipring track. Furthermore a cooling element is embedded into or attached to the slipring module to remove heat from the slipring module and to increase the temperature of the at least one slipring track. This allows decreasing the temperature of the slipring module to increase the maximum transferable power and lifetime.

Abstract: A receiving coupler for large diameter capacitive data links comprises at least two layers of isolating material, having different lengths and being attached to each other. The shorter layer comprises on its outer surface a first pair of conductors, whereas the longer layer comprises a second pair and a third pair of conductors. The conductors are connected to each other by vias. The stack of layers of different lengths can be adapted to various curve radii of transmitting components of a capacitive rotary joint.

Abstract: An inductive power transfer circuit or inductive rotary joint has an inductive rotating coupler with a primary side and a primary winding rotatably arranged against a secondary side and a secondary winding. The secondary side is connected via a rectifier to a load. The stray inductance of the coupler together with a resonance capacitor a series resonance circuit having a series resonance frequency. An inverter in a full bridge circuit is provided for converting a DC input voltage into an AC voltage. The inverter is operable in a full bridge mode to deliver a high power level and in a half bridge mode to deliver a low power level. This results in a broad dynamic range, soft power on and improved safety, as switching between the modes may be controlled by a simple hardware.