Patent application number | Description | Published |
20080285788 | Electrodynamic Transducer Including a Dome with a Ferrofluid Suspension - The invention relates to an electrodynamic transducer ( | 11-20-2008 |
20090028375 | ELECTRODYNAMIC TRANSDUCER AND USE THEREOF IN LOUDSPEAKERS AND GEOPHONES - An electrodynamic transducer includes a frame and contains at least one electric coil which is placed in a static magnetic field and which can move about a rest position in a vertical free space. The coil(s) is wound around and fixed to at mandrel and a return member is used to return the coil-bearing mandrel to the rest position in the absence of an external bias, the straight cylinder defining an inner volume and an outer volume. The magnetic field is produced by outer and inner magnetic structures which each comprise at least one fixed permanent magnet in the form of a ring. The motor does not contain any ferromagnetic or magnetic part between the outer volume and the inner volume. At least the part of the frame that is used to fix the magnets is made from a non-ferromagnetic and non-magnetic material. | 01-29-2009 |
20100172534 | MAGNETIC STRUCTURE FOR AN IRONLESS ELECTRODYNAMIC-LOUDSPEAKER MOTOR, MOTORS AND LOUDSPEAKERS - A magnetic structure generating a magnetic field for an ironless motor of an electrodynamic loudspeaker having a mobile coil, wherein the magnetic structure generates a magnetic field in a gap in which the coil is arranged. The magnetic structure includes of a stack of three magnets corresponding to one intermediate magnet and two top and bottom covering magnets, the magnets forming a straight gap border and being located side by side, the intermediate magnet having a radial magnetic polarization, the covering magnets having identical magnetic polarizations and remanent magnetizations. The covering magnets have a radial or axial magnetic polarization. When magnetic polarization of the covering magnets is radial, remanent magnetization of each covering magnet is higher than remanent magnetization of the intermediate magnet, and when magnetic polarization of the covering magnets is axial, remanent magnetization of each covering magnet is lower than remanent magnetization of the intermediate magnet. Motors are provided. | 07-08-2010 |
20110103638 | VOICE COIL SUPPORT FOR A COIL TRANSDUCER MOTOR STRUCTURE - The invention relates to a voice coil support ( | 05-05-2011 |
20110110549 | IRONLESS AND LEAKAGE FREE COIL TRANSDUCER MOTOR ASSEMBLY - The present disclosure relates to a coil transducer motor structure ( | 05-12-2011 |
20110286623 | MOVING PART AND ELECTRODYNAMIC TRANSDUCER PROVIDED WITH SUCH A MOVING PART - The invention relates to a moving part for an electro-dynamic transducer, including at least one mandrel supporting a winding of at least one coiled wire. The mandrel includes at least one first element rigidly connected inside at least one second element for guiding the moving part inside the transducer. The first element has a winding support for the coiled wire so that the coil is located inside the mandrel, as well as vibration transmitter, such as a diaphragm, the vibration being generated by the movement of the coil induced by the flow of current in the coil wire. The invention also relates to an electro-dynamic transducer including such a moving part. | 11-24-2011 |
20130156253 | ELECTRODYNAMIC SPEAKER STRUCTURE HAVING MEMS TECHNOLOGY - Said electrodynamic speaker structure having MEMS technology, comprising a stator-forming means ( | 06-20-2013 |
20140339924 | MAGNETIC MOTOR DEVICE OF AN ELECTRODYNAMIC TRANSDUCER - A magnetic motor device of an electrodynamic transducer, which includes a bonded annular magnet and a tubular element mounted coaxially relative to the bonded annular magnet. The bonded annular magnet includes a magnetic cylindrical surface, while the tubular element includes a winding extending opposite the magnetic cylindrical surface, the tubular element configured to be driven axially relative to the bonded angular magnet when electric power is supplied to the winding. A metal tubular member includes a metal cylindrical surface, and the metal tubular member is mounted coaxially relative to the tubular element such that the metal cylindrical surface extends opposite the magnetic cylindrical surface relative to the winding. | 11-20-2014 |