Abstract: There is described a hearing aid device, in particular a hearing aid such as, for example, an ITE device, comprising a section which can be provided in or on an ear and from which a multi-channel tube projects, the free end section of which can be inserted into an outer auditory canal of the ear, wherein an earpiece channel of the multi-channel tube is acoustically connected to an earpiece and an auditory canal microphone channel of the multi-channel tube is acoustically connected to an auditory canal microphone, in each case inside the hearing aid device.

Abstract: There is described a hearing device. A module is enabled to be easily attached to the casing of a hearing device, in particular a hearing aid. Toward that end a bridge is provided which has a drilled hole. A screw is inserted through a drilled hole in the module and screwed into the drilled hole of the bridge so that the module or, as the case may be, the closure of the opening is compressed onto the opening by means of the screw. Alternatively a cylindrical projection into which the screw is screwed can also be molded onto the inner wall of the casing.

Abstract: A unitary mechanical injector-vitrector hand tool for use in extracting vitreous material from an eye and injecting another fluid into the eye includes a housing body having a proximal end, a distal end and a variable volume cavity in the housing body for establishing a negative pressure or suction. A needle having a sharpened point and a central bore is connected to the proximal end of the housing body. An aperture is formed in a sidewall of the needle near the sharpened end. An inner hollow reciprocal cutter is fitted in the central bore of the needle and has a cutting edge adapted for travel across the aperture. A first manually actuatable lever is pivotably mounted to the housing body and coupled in driving relationship with the reciprocal cutter.

Abstract: An EDF amplifier comprises two EDF loops separated by optical isolators and pumped with light by pump laser diodes under the control of an output power control system. To achieve the required output power the current supplied to the pump supplying light to the input loop is set to the maximum drive current Imax for the pump laser, and the pump currents of all pumps not supplying light to the input loop, that is the pumps supplying light to the further loop or loops, are adjusted to achieve the required output power. To avoid a very high MPI, the inversion of all loops is never so low that the gain in the first loop has to compensate for loss in the following loop or loops. This is done by providing a minimum pump power to the second loop and any following loops. This ensures that the loops are always inverted enough, and that they do not exhibit too much loss. The required minimum pump current is obtained by modelling and experimental verification.

Abstract: An EDF amplifier comprises two EDF loops separated by optical isolators and pumped with light by pump laser diodes under the control of an output power control system. To achieve the required output power the current supplied to the pump supplying light to the input loop is set to the maximum drive current Imax for the pump laser, and the pump currents of all pumps not supplying light to the input loop, that is the pumps supplying light to the further loop or loops, are adjusted to achieve the required output power. To avoid a very high MPI, the inversion of all loops is never so low that the gain in the first loop has to compensate for loss in the following loop or loops. This is done by providing a minimum pump power to the second loop and any following loops. This ensures that the loops are always inverted enough, and that they do not exhibit too much loss. The required minimum pump current is obtained by modelling and experimental verification.

Abstract: A telemetry coil arrangement for the telemetric reception of transmitted signals, in particular in cardiologic implants, comprises coils of varying diameters and numbers of windings suited thereto.

Abstract: A contact assembly for making contact with a conductor on a foil, in particular a flexible foil, having a first contact region for making contact with a complementary contact and a second contact region for making contact with the conductor where the second contact region has opposing contact arms between which the foil can be introduced and at least one contact arm, on opposing sides, has tongues which can be bent around the other contact arm in such a way that the two contact arms are pressed against one another, to hold the conductor of the foil therebetween.

Abstract: A conveyor belt of a continuous strip-casting device for casting strips of metal, particularly steel, which belt is guided by a driven drum and a drum horizontally adjacent to the driven drum and displaceable for tensioning the belt. The belt rests in this connection on a support arranged between the drums and the side thereof facing away from the cast strip is cooled. The conveyor belt has, on the side remote from the cast strip, uniformly distributed blind holes. The blind holes are separated by webs of a minimum width. The total surface area of the webs is 0.15 to 0.4 times the total surface area of the belt. The bottoms of the blind holes have a wall thickness which, upon heating by the cast strip with simultaneous cooling of the inside surface of the blind holes, permits a bulging of the bottom of less than 1 mm.

Abstract: A method and a device is described. The probe device is a leading probe for surgical procedures which includes both instrument access and illumination. The leading probe device includes an annular arrangement of a plurality of light transmission fibers about a central instrument-receiving working channel. The leading probe may be fixed on the outer wall of the eye by a notched footplate with suitable suture material. Alternatively, the present invention device may have an appropriate adhesive member for securing the leading probe at the surface of the eyeball.

Abstract: A magnetic thickness gauge is disclosed wherein a balance arm is pivotally mounted in a housing with a spring providing a bias force to counteract a magnetic attraction of the balance arm toward a base of a coating to be measured. The balance arm is provided with a probe assembly including a magnet selectively positionable with respect to a spherical contact member of either a particular alloy of aluminum, iron and silicon or of tungsten carbide. The housing is preferably provided with supports at either end of the gauge. A balance arm is moved by way of a protrusion provided between the probe assembly and an adjustment knob for the spring with a scale and pointer indicating the thickness of the coating to be measured.

Abstract: A method and apparatus are disclosed for magnetically measuring a coating on a magnetizable material. The apparatus includes a plurality of magnets flexibly connected to one another with the magnets preferably provided on a strap of flexible material. Each magnet has a coating with a predetermined thickness provided over only a first portion of the magnet and preferably over one pole of the magnet. The coating of each of the plurality of magnets differs in thickness from one to another. The magnets contact the coating to be measured at a second portion of the magnets and the coating of each magnet is then contacted sequentially with a member of a magnetizable material. If the magnet is lifted with the member, the coating to be measured is greater than the thickness of the coating of the magnet. If the magnet is not lifted with the member, the coating to be measured is less than the thickness of the coating of the magnet.

Abstract: A magnetic thickness gauge is disclosed wherein a balance arm is pivotably mounted in a housing with a spring providing a bias force to counteract a magnetic attraction of the balance arm toward a base of a coating to be measured. The balance arm is provided with a probe assembly including a magnet selectively positionable with respect to a spherical contact member of either a particular alloy of aluminum, iron and silicon or of tungsten carbide. The housing is preferably provided with supports at either end of the gauge. A balance arm is moved by way of a protrusion provided between the probe assembly and an adjustment knob for the spring with a scale and pointer indicating the thickness of the coating to be measured.

Abstract: A coating thickness and surface comparator for measuring the thickness of nonmagnetic coatings (28) or roughness on ferromagnetic base materials. A permanent rod magnet (6) and a ferromagnetic rod (16) are supported by nonmagnetic slides (12, 14) parallel to one another. When a standard base (24) is placed at one end (22) of the rod magnet (6) and a coated or roughened base (30) is placed at the other end, the slides (12, 14) are pushed together toward the middle of the rod magnet (6). The coincidence of the slides (12, 14) varies from the middle of the bar magnet (6) in proportion to coating thickness (28) or roughness.