Patents by Inventor Terry D. Mathis
Terry D. Mathis has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 6205277Abstract: A preferred embodiment of the dry core optical fiber cable of the present invention incorporates a plurality of sub-units with each of said sub-units being arranged adjacent another of the sub-units so that the plurality of sub-units define an outer periphery. Preferably, each of the sub-units includes a plurality of optical fibers, a yarn layer and a sub-unit jacket, with each of the optical fibers being arranged adjacent another of the optical fibers. The sub-unit jacket surrounds the optical fibers, with the yarn layer being disposed between the optical fibers and the sub-unit jacket. An outer jacket surrounds the plurality of sub-units, with water-blocking tape being disposed between the outer jacket and the outer periphery of the sub-units. A method of manufacture of the cable also is provided.Type: GrantFiled: February 19, 1999Date of Patent: March 20, 2001Assignee: Lucent Technologies Inc.Inventors: Terry D. Mathis, Wayne M. Newton, Jim J. Sheu, Montri Viriyayuthakorn, Carla G. Wilson, Mark I. Shmukler
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Patent number: 6108475Abstract: A fiber optic cable having stress indicating means and a method for making same. The stress indicating means provides a cost effective method for determining whether an optical cable has been bent, stressed or otherwise mishandled, which may cause optical loss when the cable is placed in service. Broadly stated, the fiber optic cable according to the instant invention includes an optical fiber, comprised of a core and a cladding and a stress indicator concentrically disposed about the fiber that changes color when subjected to stress. A technician can thereby visually identify cables that have been bent or mishandled and subject them to testing before installation.Type: GrantFiled: December 22, 1997Date of Patent: August 22, 2000Assignee: Lucent Technologies Inc.Inventors: John T. Chapin, Terry D. Mathis, Montri Viriyayuthakorn
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Patent number: 5982967Abstract: The present invention provides a color-coded optical fiber cable and a method for manufacturing the color-coded optical fiber cable. The optical fiber cable of the present invention comprises a glass fiber, a buffer surrounding the fiber, which may be comprised of nylon, an aramid fiber strength member surrounding the fiber buffer, and an outer sheath surrounding the aramid fiber strength member. In accordance with a first embodiment of the present invention, optical fiber cables are color coded by using aramid fiber strength members of different colors. Once a color-coded aramid fiber strength member has been placed about the fiber buffer, it is surrounded by a light-transmissive outer sheath so that the color of the aramid fiber strength member can be easily ascertained, even when the optical fiber cable is wound up on a reel.Type: GrantFiled: December 12, 1997Date of Patent: November 9, 1999Assignee: Lucent Technologies Inc.Inventors: Terry D. Mathis, John T. Chapin, Montri Viriyayuthakorn
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Patent number: 5345525Abstract: An optical fiber cable (20) includes a core (22) which includes a plurality of bundles (31, 31 ) of optical fiber (24) and a yarn-like strength member system (35) which is wrapped with an oscillated or unidirectional lay about the optical fibers. The strength member system also provides impact resistance for the fibers. A jacket (40) which may include a flame-resistant plastic material encloses the core with the outer diameter of the jacket being substantially less than that of typical optical fiber cables. Portions of the strength member system contact an inner surface of the jacket, an outer surface of which is the outer surface of the cable.Type: GrantFiled: January 28, 1992Date of Patent: September 6, 1994Assignee: AT&T Bell LaboratoriesInventors: James R. Holman, Terry D. Mathis, Parry A. Moss
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Patent number: 5050957Abstract: An optical fiber cable (20) which is suitable for service from a distribution closure to a customer's premises includes a transmission media core (21) enclosed in a relatively rigid tubular member (40). The relatively rigid tubular member is enclosed in a jacket (44) comprising a plastic material which has a cut-through resistance which is substantially less than that of the tubular member. Interposed between the tubular member and an outer surface of the jacket is a strength member system comprising two yarn-like longitudinally extending strength member groups (52--52). The strength member grops are diametrically opposed to each other and are disposed in engagement with the tubular member.Type: GrantFiled: April 27, 1990Date of Patent: September 24, 1991Assignee: AT&T Bell LaboratoriesInventors: Alfred S. Hamilton, James R. Holman, Michael D. Kinard, Terry D. Mathis
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Patent number: 4934785Abstract: Disclosed is an optical fiber connector that comprises two right capillary cylinders or "plugs", an alignment sleeve that contactingly maintains the plugs in substantially fixed relative relation, and means for maintaining the plugs in substantially fixed relative axial relation. Connectors according to the invention can have very low insertion loss, are easily field-installed, can be easily and relatively inexpensively manufactured, and are useful for single mode as well as for multimode fiber applications. In a preferred embodiment the connector takes the form of the ST.RTM. connector.Type: GrantFiled: February 23, 1989Date of Patent: June 19, 1990Assignee: American Telephone and Telegraph CompanyInventors: Terry D. Mathis, Calvin M. Miller
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Patent number: 4896938Abstract: Disclosed is an optical fiber connector that comprises two right circular glass tubular cylinders, means for maintaining the cylinders in substantially fixed relative radial relation, and means for maintaining the cylinders in substantially fixed relative axial relation. The fiber ends that are to be connected are maintained in the bores of the respective glass cylinders by UV-curable adhesive means. Connectors according to the invention can have very low insertion loss, are easily field-installed, can be easily and inexpensively manufactured, and are useful for single mode as well as for multimode fiber applications.Type: GrantFiled: February 27, 1989Date of Patent: January 30, 1990Assignee: American Telephone and Telegraph Company, AT&T Bell LaboratoriesInventors: Terry D. Mathis, Calvin M. Miller
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Patent number: 4850670Abstract: The optical fiber connector comprises two right circular drawn glass capillary cylinders, means for maintaining the cylinders in substantially fixed relative radial relation, and means for maintaining the cylinders in substantially fixed relative axial relation. The invention has a multiplicity of embodiments, including connectors functioning as variable attenuators, as fiber-to-fiber switches and connectors comprising an in-line filtering element. Connectors according to the invention can have very low insertion loss, are easily field-installed, can be easily and inexpensively manufactured, and are useful for single mode as well as for multimode fiber applications.Type: GrantFiled: August 29, 1983Date of Patent: July 25, 1989Assignee: American Telephone and Telegraph Company, AT&T Bell LaboratoriesInventors: Terry D. Mathis, Calvin M. Miller
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Patent number: 4691986Abstract: In a plug-type optical fiber connector low loss can be achieved, without any active alignment of the fiber cores, if the two cylindrical plugs used in the connector are "contiguous" plugs, i.e., derived from contiguous segments of the tubular stock from which the plugs are produced, and if the plugs are arranged such that the "contiguous" ends of the plugs are the mating ends, and such that the rotational relationship between the plugs is substantially the one that existed prior to sectioning. The inventive connector comprises two contiguous plugs and includes features that permit identification of the contiguous ends and of the rotational relationship. In a preferred embodiment, the tubular stock is drawn glass stock, the two contiguous segments are left joined but scored circumferentially to permit easy separation in the field, with a longitudinal groove in the outer cylinder surface of the contiguous segments identifying the original rotational relationship.Type: GrantFiled: November 6, 1985Date of Patent: September 8, 1987Assignee: American Telephone and Telegraph Company, AT&T Bell LaboratoriesInventors: James A. Aberson, Jr., George F. DeVeau, Jr., Terry D. Mathis, Calvin M. Miller
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Patent number: 4418248Abstract: A stereophone includes cup assemblies which are supported over the ears of a user by a headband. Each cup assembly includes a piezoelectric acoustic transducer and a dynamic acoustic transducer. The reproduction of the entire audio spectrum is divided between the two transducers at a crossover frequency which is established by an acoustic filter.Type: GrantFiled: December 11, 1981Date of Patent: November 29, 1983Assignee: Koss CorporationInventor: Terry D. Mathis
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Patent number: 4320938Abstract: A connector assembly (10) has been developed with an aligning coupler (300) and connectors (100, 200) which simplify the joining of a pair of mateable optical fiber termination structures (112, 212). The coupler (300) comprises a pair of rigid elongated members (310, 340) having inner surfaces (312, 342) and tapering outer end surfaces (328, 358). Resilient members (370) hold the elongated members together to define a fiber termination structure receiving orifice (380) which has a cross section normally narrower in one dimension than that of the termination structures. Due to the resilient members, the elongated members can separate to ease insertion of the termination structures and then come back together to urge precise-aligning outer surface means (122, 222) on each termination structure into registration against a precisealigning coupler reference surface (332) in the orifice. Thus registration is maintained until the connector assembly can be fastened.Type: GrantFiled: December 26, 1979Date of Patent: March 23, 1982Assignee: Bell Telephone Laboratories, IncorporatedInventors: Carl E. Gunnersen, Terry D. Mathis