A chair for particular use in clinical or hospital environments has a frame to which a support material is secured. The frame may include a seat frame and a separate head rest frame. The support material may be provided over the seat frame and the over the head rest frame. The support material may be made from a textile of interwoven strands wherein some of the interwoven strands include copper containing particles such as copper iodide or copper oxide within the textile fibers.

There is disclosed an illuminated cable comb including a body incorporating at least two openings for removably retaining a corresponding at least two cables in a fixed position relative to the body. The comb further includes a light source within the body, and conductive material within the body capable of transmitting power to the at least one light such that the at least one light illuminates the body when power is supplied.

A bushing and a method for monitoring the bushing. The bushing is a high-voltage DC bushing with a test tap. The high-voltage DC bushing arrangement includes a monitoring device configured to inject a voltage and/or current pulse signal via the test tap and to detect and process a corresponding response signal. There is also described a method for operating an HVDC bushing, an HVDC transformer, and a converter arrangement with the bushing.

A chair for particular use in clinical or hospital environments has a frame to which a support material is secured. The support material may form a chair back and/or a seat for the chair to provide support to the chair occupant. The support material may be made from a textile that includes copper containing particles such as copper iodide or copper oxide within the textile fibers.

Method and apparatus for improving sound quality in audio cables, including a plurality of equally spaced conductive discs separated by a gap and configured in a generally linear array, each of the discs having an annular shape with planar sides, an outer diameter, a center hole having a diameter, and a thickness. The disc array is placed around an audio signal cable such that the planar sides of the discs are oriented parallel to one another and perpendicular to signal cable axis. The spacing between discs is approximately four to ten times the thickness of said discs, and the disc diameter is between 2 and 4 times the diameter of the center hole.

A composite insulator (1) for overhead power lines comprises a rigid core extending axially between two attachment fittings (6) and having placed thereon a shell having sheds (5, 5) made of electrically insulating synthetic material. It includes a detector device for detecting surface leakage currents, which device includes an electrically conductive metal annular ring (7) surrounding the shell between an end shed (5) adjacent to one of the two fittings (6) and another shed (5) adjacent to the end shed (5) that extends radially over the ring (7). The ring (7) is connected by a conductive wire (8) passing through the end shed (5) to be connected to an electronic unit (9) of the detector device.

A composite insulator (1) for overhead power lines comprises a rigid core extending axially between two attachment fittings (6) and having placed thereon a shell having sheds (5, 5) made of electrically insulating synthetic material. It includes a detector device for detecting surface leakage currents, which device includes an electrically conductive metal annular ring (7) surrounding the shell between an end shed (5) adjacent to one of the two fittings (6) and another shed (5) adjacent to the end shed (5) that extends radially over the ring (7). The ring (7) is connected by a conductive wire (8) passing through the end shed (5) to be connected to an electronic unit (9) of the detector device.

An overhead power line insulator comprises a dielectric element (4) having an outside surface forming a skirt (5) with a head extended by a metal attachment fitting (7) for attaching the insulator, and a device for detecting surface leakage current flowing on the dielectric (4), the device comprising a conductive ring (8) that surrounds the fitting (7) and that is in contact with the outside surface of the dielectric (4). An electrically insulating protective element (10) is provided in the form of a collared bushing that surrounds the fitting (7), being interposed between the ring (8) and the fitting (7) and extending radially so as to overlie the ring (8) in order to protect it from environmental pollution.

An electrical isolator having an isolator body and at least one leakage current measurement sensor embedded in the isolator body and configured to measure the leakage currents circulating on a surface of the isolator body is provided. The leakage current measurement sensor is self-powerable by electric energy produced by the leakage currents. The electrical isolator is for high-voltage lines.

The present disclosure relates to an electrical wire having a leakage current limiting function, in which, since a neutral line is provided to have a greater cross-sectional area than that of a phase voltage line, a leakage current leaking from the phase voltage line may be limited, and thus the risk of electric shock to the human body due to the leakage current may be minimized.