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  Fabric construction specifically for damperUSPTO Application #: 20070287344Title: Fabric construction specifically for damper Abstract: The present invention provides a fabric structure specifically for dampers. Its major feature is to weave metal yarns with non-metal yarns into a fabric body, which, after proper production steps, is then molded into dampers. Such a damper structure incorporating metal yarns may greatly enhance the mechanical properties of dampers, as well as improve the manufacturing yield and tear-resistance performance of the product. The metal yarns and non-metal yarns may be woven in various ways of arrangement, depending on the objective design requirement of the damper, so as to obtain the same or different strength and mechanical properties. (end of abstract)
Agent: Lin & Associates Intellectual Property, Inc. - Saratoga, CA, US Inventor: Hiroshi Ohara USPTO Applicaton #: 20070287344 - Class: 442 2 (USPTO) The Patent Description & Claims data below is from USPTO Patent Application 20070287344. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001]1. Field of the Invention [0002]The present invention generally relates to loudspeakers, and more particularly to a fabric construction for dampers of loudspeakers. [0003]2. The Prior Arts [0004]FIG. 1 depicts a typical moving-coil loudspeaker construction which comprises a driving system, a diaphragm, and a suspension system. The driving system further includes a permanent magnet A, an upper pole piece B, a gap C and a voice coil D. Aforementioned diaphragm E is a vibrating lamina for moving air, normally shaped like a cone or dome basket. The suspension system includes a damper F and a lateral suspension construction, and is responsible for the traction of directional movement of diaphragm E. [0005]The driving mechanism of aforementioned loudspeaker is as below. When the electric current flows through the voice coil D, an electromagnetic field is induced. The electromagnetic field is at right angle with the magnetic field of the permanent magnet A of the speaker such that the voice coil D experiences forces and thus moves within gap C (the gap between the voice coil D and the magnet A). The mechanic force of the movement causes the diaphragm E attached to the voice coil D to move (vibrate) perpendicularly upward and downward, which in turn vibrates the air and produces acoustic frequency to human ears. In this way, sound is reproduced for hearing. [0006]Though other types of loudspeakers may be structured differently, they have the same driving mechanism, and include at least dampers for suspending diaphragms and voice coils. [0007]Please refer to FIG. 2 for illustration. Because dampers are mainly used for suspending voice coils and diaphragms, they are generally structured with a plurality of alternating concentric peaks and valleys. That is, their cross section exhibits a wave contour, which enables the dampers to act like shock-absorbent springs while suspending voice coils and diaphragms at the same time. Hence, the elasticity and strength of dampers may directly influence the amplitude of diaphragm vibration, and accordingly influence the acoustic effect. [0008]Conventional dampers utilize a fabric body woven with non-metal yarns (such as nylon, silk, etc.) The fabric body is resinated, dried, and then integrally molded into dampers. Accordingly, dampers manufactured in this way have lower strength and low tear-resistance performance, which renders the dampers susceptible to be deformed and consequently influences the acoustic output quality of speakers. In another aspect, the structure of conventional damper fabric makes it difficult to improve the stretch and water-proof performance of dampers. Also, heat generated after prolonged operation of the speaker can not be conducted and dissipated rapidly as well. SUMMARY OF THE INVENTION [0009]To improve such mechanical disadvantages as low strength, low tear-resistant performance, low heat conduction, low stretch and waterproof performance of dampers manufactured with fabric woven exclusively with non-metal yarns, a fabric structure which obviates aforementioned disadvantages without sacrificing the elasticity required for dampers is provided herein. [0010]The main feature of the present invention is to add metal yarns properly into the fabric for manufacturing dampers in a way such that said metal yarns are incorporated as part of the fabric body, so that when the fabric is molded into dampers, the metal yarns may enhance the various mechanical properties of dampers. [0011]The major technical means of the present invention is to weave non-metal yarns with metal yarn into a fabric body. The woven fabric is processed further and then molded into a desired damper form. [0012]A further technical means of the present invention is to arrange the metal yarns woven into the fabric body in a grid, with a plurality of non-metal yarns positioned between two metal yarns and parallel thereto. [0013]A still further technical means of the present invention is to arrange metal yarns woven in a non-metal yarns fabric body radially such that when the damper is molded, said metal yarns may radiate from the center of the damper. [0014]An even further technical means of the present invention is to arrange non-metal yarns woven in the fabric body in a grid, with metal yarns interlacing with said non-metal yarns non-perpendicularly. [0015]In sum, the present invention provides a fabric structure specifically for dampers. Its major feature is to weave metal yarns with non-metal yarns into a fabric body, which, after proper production steps, is then molded into dampers. Such a damper structure incorporating metal yarns may greatly enhance many mechanical properties of dampers, as well as improve the manufacturing yield and tear-resistance performance of the product. Said metal yarns and non-metal yarns may be woven with various ways of arrangement, depending on the objective design requirement of the damper, to obtain the same or different strength and mechanical properties. BRIEF DESCRIPTION OF THE DRAWINGS [0016]The present invention will be apparent to those skilled in the art by reading the following detailed description with reference to the attached drawings, in which: [0017]FIG. 1 is a sectional plan view of a conventional moving-coil loudspeaker construction; [0018]FIG. 2 is a perspective cutaway view of a damper construction in accordance with the present invention; [0019]FIG. 3 is a schematic plan view of a fabric body in accordance with a first embodiment of the present invention, wherein metal yarns are arranged in a grid, with a number of non-metal yarns positioned between two metal yarns and parallel thereto; [0020]FIG. 4 is a schematic plan view of a fabric body in accordance with a second embodiment of the present invention, wherein metal yarns are woven radially into a non-metal yarn fabric body; [0021]FIG. 5 is a schematic plan view of a fabric body in accordance with a third embodiment of the present invention, wherein non-metal yarns are arranged in a grid, with metal yarns arranged diagonally and interlacing with said non-metal yarns; Continue reading... Full patent description for Fabric construction specifically for damper Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Fabric construction specifically for damper patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Fabric construction specifically for damper or other areas of interest. ### Previous Patent Application: Life-saving garment Next Patent Application: Synthetic nonwoven wallcovering with aqueous ground coating Industry Class: Fabric (woven, knitted, or nonwoven textile or cloth, etc.) ### FreshPatents.com Support Thank you for viewing the Fabric construction specifically for damper patent info. 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