Abstract: An electric switching device for an implantable hearing aid is disclosed. The device automatically, directly or indirectly activates the power consumption for an implantable hearing aid when an outer sound processor is installed on the patient and turns off/reduces the power consumption when the sound processor is removed.

Abstract: An electrical network for driving electromagnetic bone conduction vibrator/transducer of variable reluctance type which is applied between the vibrator terminals and the power amplifier terminals so that the vibrator mechanical output is maximized in the mid and high frequencies.

Abstract: An electric switching device for an implantable hearing aid is disclosed. The device automatically, directly or indirectly activates the power consumption for an implantable hearing aid when an outer sound processor is installed on the patient and turns off/reduces the power consumption when the sound processor is removed.

Abstract: A bone conduction transducer comprising a first seismic mass and a second mass connected to each other by a first spring suspension, and where the first mass and the first spring suspension creates a first mechanical resonance f1 in the low frequency range, and that a second mechanical resonance f2 is created in the high frequency range by interaction between the second mass and a second spring compliance that is introduced between the second mass and the skull.

Abstract: An electrical network for driving electromagnetic bone conduction vibrator/transducer of variable reluctance type which is applied between the vibrator terminals and the power amplifier terminals so that the vibrator mechanical output is maximized in the mid and high frequencies.

Abstract: The present invention comprises a new topology of a balanced variable reluctance transducer where magnets are moved to a lateral position relative to the dynamic flux circuit. This makes the whole transducer considerably smaller and the air gaps become fully visible from the outside.

Abstract: A method and device for connecting a bone conductor transducer contained in a housing to the skull bone for the transmission of vibrations characterized by, that the housing has at least one surface, which is placed against the bottom plane of a recess shaped in the temporal bone with a static force exceeding the dynamic signal forces.

Abstract: The present invention relates to a method for fitting and verification of direct bone conduction hearing devices to a patient, wherein a. in a first step the hearing threshold and loudness discomfort levels are measured directly on a titanium implant of a patient, b. in a second step these hearing threshold and loudness discomfort levels are converted to equivalent force thresholds (FHT) and loudness discomfort levels (FLDL) on an artificial skull force measuring device, c. in a final step the output force levels of the direct bone conduction hearing device is measured in a free sound field with the device attached to the said artificial skull force measuring device and compared to the FHT and the FLDL as the base for final adjustments of the device.

Abstract: The invention relates to a process for producing alkali metal chlorate in an electrolytic cell that is divided by a cation selective separator into an anode compartment in which an anode is arranged and a cathode compartment in which a gas diffusion electrode is arranged. The process comprises introducing an electrolyte solution containing alkali metal chloride into the anode compartment and an oxygen-containing gas into the cathode compartment. The invention also relates to an electrolytic cell for the production of alkali metal chlorate comprising a cation selective separator dividing the cell into an anode compartment in which an anode is arranged and a cathode compartment in which a gas diffusion electrode is arranged. An inlet for electrolyte solution and an outlet for electrolysed solution are provided in the anode compartment and an inlet for introducing oxygen-containing gas is provided in the gas chamber.

Abstract: A bone conduction transducer comprising a first seismic mass and a second mass connected to each other by a first spring suspension, and where the first mass and the first spring suspension creates a first mechanical resonance f1 in the low frequency range, and that a second mechanical resonance f2 is created in the high frequency range by interaction between the second mass and a second spring compliance that is introduced between the second mass and the skull.

Abstract: A method and device for connecting a bone conductor transducer contained in a housing to the skull bone for the transmission of vibrations characterized by, that the housing has at least one surface, which is placed against the bottom plane of a recess shaped in the temporal bone with a static force exceeding the dynamic signal forces.

Abstract: The present invention relates to a method for fitting and verification of direct bone conduction hearing devices to a patient, wherein a. in a first step the hearing threshold and loudness discomfort levels are measured directly on a titanium implant of a patient, b. in a second step these hearing threshold and loudness discomfort levels are converted to equivalent force thresholds (FHT) and loudness discomfort levels (FLDL) on an artificial skull force measuring device, c. in a final step the output force levels of the direct bone conduction hearing device is measured in a free sound field with the device attached to the said artificial skull force measuring device and compared to the FHT and the FLDL as the base for final adjustments of the device.

Abstract: The present invention relates to an electromagnetic vibrator of variable reluctance type, according to a new principle which provides higher efficiency, smaller dimension, and higher reliability compared to known technology. This has been obtained by that the magnetic signal flux generated by the coil is closed through a bobbin body and one or more yokes, and wherein the bobbin body and the yokes are made of laminated metal sheets having good magnetic properties.

Abstract: The present invention relates to an electromagnetic vibrator of variable reluctance type, according to a new principle which provides higher efficiency, smaller dimension, and higher reliability compared to known technology. This has been obtained by that the magnetic signal flux generated by the coil is closed through a bobbin body and one or more yokes, and wherein the bobbin body and the yokes are made of laminated metal sheets having good magnetic properties.

Abstract: The invention relates to a construction for ventilation of hydrogen gas comprising at least a first metallic layer (1), sensitive to hydrogen embrittlement, a second (2) metallic layer, and a mesh (4), wherein the first layer (1) is joined to the second layer (2), and said mesh (4), forming venting channels (5) through which channels (5) hydrogen can be vented, is joined to, and in between, said first (1) and second (2) metallic layers. The invention further concerns a method for production thereof.

Abstract: The present invention relates to a percutaneous bone anchored transferring device and a connecting device for obtaining a transfer of an electrical signal and/or energy and/or distribution of a drug and/or airing of a body cavity and a system and a method for using the same.

Abstract: The present invention relates to an electromagnetic vibrator of variable reluctance type, according to a new principle which provides higher efficiency, smaller dimension, and higher reliability compared to known technology. This has been obtained by the magnetic signal flux around the coil is closed through a bobbin body and a yoke and through air gaps formed between bobbin body and yoke(s) where a static flux from one or more of the permanent magnets and the signal flux cooperates so that static forces are outbalanced and so that axial signal forces are generated. The new vibrator principle has been names: Balanced Electromagnetic Separation Transducer (BEST).

Abstract: The present invention relates to an electromagnetic vibrator of variable reluctance type, according to a new principle which provides higher efficiency, smaller dimension, and higher reliability compared to known technology. This has been obtained by the magnetic signal flux around the coil is closed through a bobbin body and a yoke and through air gaps formed between bobbin body and yoke(s) where a static flux from one or more of the permanent magnets and the signal flux cooperates so that static forces are outbalanced and so that axial signal forces are generated. The new vibrator principle has been names: Balanced Electromagnetic Separation Transducer (BEST).

Abstract: The invention relates to a construction for ventilation of hydrogen gas comprising at least a first metallic layer (1), sensitive to hydrogen embrittlement, a second (2) metallic layer, and a mesh (4), wherein the first layer (1) is joined to the second layer (2), and said mesh (4), forming venting channels (5) through which channels (5) hydrogen can be vented, is joined to, and in between, said first (1) and second (2) metallic layers. The invention further concerns a method for production thereof.

Abstract: At the production of alkali metal chlorate by electrolysis of an electrolyte containing alkali metal chloride in an electrolyzer, impurities of silicon are removed by precipitation with iron ions. Preferably, Fe(II) and/or Fe(III) can be employed as the iron ions. The iron ions can be added either to the electrolyte or to an aqueous solution of the alkali metal chloride.