Systems for grounding components in a machine are disclosed. In one embodiment, a system includes: an inner component configured to be connected to a shaft; a ground component configured to be disposed substantially about the inner component, the ground component configured to complement the inner component and substantially define a cavity there between; and a conductive substance disposed within the cavity substantially between the inner component and the ground component, the conductive substance configured to electrically connect the inner component and the ground component.

A semiconductor device is disclosed, the semiconductor device including first member an second the e first member relatively rotating to the second member; and a conductive liquid or a metal brush provided the first and second members, the first and second members are electrically connected by the conductive liquid or the metal brush.

A brushless slip ring (400) is provided. The brushless slip ring (400) includes a first conductive rotating member (412), a second conductive non-rotating member (416) positioned a predetermined distance away from the first conductive rotating member, and a conductive semi-solid material (418) electrically coupling the first conductive rotating member to the second conductive non-rotating member, the semi-solid material is configured to transfer electric current from the rotating member to the non-rotating member.

An eddy current drive (711) has an electromagnet (15, 17) and an armature (19). Either one of the electromagnet or the armature is coupled to a motor shaft (31) so as to rotate therewith, while the other is coupled to a load portion (21). The motor can rotate at a continuous speed, while the speed of the load portion can vary by varying the energization of the electromagnet, so as to vary the coupling between the electromagnet and the armature. In one embodiment, the electromagnet is energized by way of inductive coils (217, 219). The coils provide a rotary coupling. In another embodiment, an electrical generator (713) is provided. The rotation of the motor shaft (31) generates electrical current that is used to energize the electromagnet. The amount of the electrical current that is provided to the electromagnet can be varied to vary the output speed of the load portion.

An eddy current drive (711) has an electromagnet (15, 17) and an armature (19). Either one of the electromagnet or the armature is coupled to a motor shaft (31) so as to rotate therewith, while the other is coupled to a load portion (21). The motor can rotate at a continuous speed, while the speed of the load portion can vary by varying the energization of the electromagnet, so as to vary the coupling between the electromagnet and the armature. In one embodiment, the electromagnet is energized by way of inductive coils (217, 219). The coils provide a rotary coupling. In another embodiment, an electrical generator (713) is provided. The rotation of the motor shaft (31) generates electrical current that is used to energize the electromagnet. The amount of the electrical current that is provided to the electromagnet can be varied to vary the output speed of the load portion.

An eddy current drive (711) has an electromagnet (15, 17) and an armature (19). Either one of the electromagnet or the armature is coupled to a motor shaft (31) so as to rotate therewith, while the other is coupled to a load portion (21). The motor can rotate at a continuous speed, while the speed of the load portion can vary by varying the energization of the electromagnet, so as to vary the coupling between the electromagnet and the armature. In one embodiment, the electromagnet is energized by way of inductive coils (217, 219). The coils provide a rotary coupling. In another embodiment, an electrical generator (713) is provided. The rotation of the motor shaft (31) generates electrical current that is used to energize the electromagnet. The amount of the electrical current that is provided to the electromagnet can be varied to vary the output speed of the load portion.

An eddy current drive (711) has an electromagnet (15, 17) and an armature (19). Either one of the electromagnet or the armature is coupled to a motor shaft (31) so as to rotate therewith, while the other is coupled to a load portion (21). The motor can rotate at a continuous speed, while the speed of the load portion can vary by varying the energization of the electromagnet, so as to vary the coupling between the electromagnet and the armature. In one embodiment, the electromagnet is energized by way of inductive coils (217, 219). The coils provide a rotary coupling. In another embodiment, an electrical generator (713) is provided. The rotation of the motor shaft (31) generates electrical current that is used to energize the electromagnet. The amount of the electrical current that is provided to the electromagnet can be varied to vary the output speed of the load portion.

Eine Vorrichtung zum galvanischen Behandeln eines drehend antreibbaren Körpers (1) in einer Elektolytwanne, insbesondere zum Aufkupfern und/oder Verchromen von Tiefdruckzylindern, ist mit einer Stromübertragungsvorrichtung (6) ausgestattet. Diese weist einen mit dem Körper (1) mitdrehenden Teil (eine Stromübertragungshülse (16)) sowie einen stationären Teil (einen Lagerkörper (17)) auf. Die Stromübertragung von einem zum anderen Teil erfolgt über ein in einem geschlossenen Raum (20, 41, 38, 40) vorhandenes und sich bei Raumtemperatur im flüssigen Zustand befindendes Metall oder eine Metallegierung. Die Stromübertragungsvorrichtung (6) ermöglicht eine absolut staubfreie Übertragung von hohen Strömen; ausserdem kann auch das zum Drehen des mitdrehenden Teiles erforderliche Drehmoment erheblich reduziert werden, da die durch einen relativ hohen Anpressdruck der bisher zur Stromübertragung erforderlichen Kohlenbürsten bedingte Reibung wegfällt.

A ferrofluidic seal arrangement for sealing a high-speed rotary shaft (15) which passes between an environment at atmospheric or high pressure and an environment (14) at high-vacuum is provided, which is especially useful in a high-speed rotating anode apparatus for generating x-rays in a CAT Scan apparatus or the like. A differentially-pumped region (50) between a multi-stage ferrofluidic seal (19,22,48,49) and a single-stage seal (43 to 47) insures that no seal bursting into the-high-vacuum region occurs. Bearings (17, 18) supporting the shaft are arranged in a mechanically-stable arrangement but are isolated from the high-vacuum environment. Thus, neither the high-vacuum environment (14) nor the differentially-pumped region need be continually mechanically pumped, and a relatively light-weight apparatus results. The apparatus is electrically grounded by transferring the charge on the anode (58) through the high-speed shaft out of the vacuum environment and to a slower-rotating shaft (40) via an electrically conductive, flexible drive belt (37), the slower shaft rotating at a speed at which grounding by conventional means (41) is feasible.

Contact électrique qui comprend un élément mâle (1 ou 12) et un élément femelle (2 ou 13) dans lequel l'élément mâle est monté coulissant à frottement dur, une chambre d'air (11) étant ménagée entre l'extrémité de l'élément mâle et le fond de l'élément femelle.

Ces deux éléments mâle et femelle sont au moins partiellement en une matière poreuse imbibée d'une solution aqueuse chargée de particules submicroniques métalliques.