Patents by Inventor Joel D. Finegan
Joel D. Finegan 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: 6061205Abstract: A slider support assembly (20) includes a support arm (2) extendible over a magnetic disk (8). A slider (4), including a data head (12), is mounted to the support arm. The slider is mounted so the slider can pivot in a radially oriented roll plane (18) about an effective roll axis (44). The effective roll axis is typically located centrally beneath the slider, preferably about half-way through the disk. By moving the effective roll axis from a position above the data surface, as found with conventional gimbal-type slider supports, to a point below the data surface, pivotal radial movements of the slider relative to the data surface due to flutter of the data surface are reduced or eliminated. This helps to prevent track misalignment between the data head and data track caused by flutter or other excursions of the disk while spinning.Type: GrantFiled: January 30, 1998Date of Patent: May 9, 2000Inventor: Joel D. Finegan
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Patent number: 5844212Abstract: A dual plate heater provides two parallel temperature self-regulating heater plates or wire mesh comprising ferromagnetic material with one or more electrically energized coils parallel to and located between the heater plates which coil(s) when energized by a constant current or by an otherwise controlled current heat the plates to their Curie temperature or temperatures. The coil may be a flat spiral of thin conductive (copper) wire embedded in a thin layer of a heat conductive, electrically non-conductive material between said plates whereby heat energy generated in the coil is supplied to the heater plates. The dual plate heater may be employed to heat plastic pipes to their butt welding temperatures after which the heater is removed to the ends of the pipes to be joined are brought into contact under pressure. The dual plate heaters may also be employed in other arrangements such as shelves in a dispensing machine.Type: GrantFiled: June 18, 1996Date of Patent: December 1, 1998Assignee: Gas Research InstituteInventors: David M. Dickens, James B. Ross, Joel D. Finegan
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Patent number: 5786575Abstract: A wrap tool having first and second coil regions and flange regions for inducing oscillating magnetic fields to fuse a plastic coupling having heating elements to a substrate. The first and second coil regions are wrapped around a selected plastic coupling and substrate to induce fusion currents causing melting and fusion of plastic pipes inserted into a magnetically energizable pipe coupling. The flange regions of the wrap tool are positioned adjacent each other overlappingly or inner surface to inner surface, permitting opposite current coil portions to cancel the other's magnetic fields and reduce coil inductance.Type: GrantFiled: December 20, 1995Date of Patent: July 28, 1998Assignee: Gas Research InstituteInventors: Randy J. Bleske, Joel D. Finegan
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Patent number: 5600862Abstract: A pipe scraper for removing a uniform amount of material from the perimeter of a pipe. The pipe scraper has a shoulder and biased members for urging the pipe against an interior surface of the scraper body to achieve a uniform scrape with both round and oval pipes, without a need for blade adjustment. Uneven scraping due to canting of the pipe with respect to the body is also eliminated.Type: GrantFiled: January 4, 1996Date of Patent: February 11, 1997Assignee: Gas Research InstituteInventors: Randy J. Bleske, Joel D. Finegan
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Patent number: 5528020Abstract: A dual plate heater provides two parallel temperature self-regulating heater plates or wire mesh comprising ferromagnetic material with one or more electrically energized coils parallel to and located between the heater plates which coil(s) when energized by a constant current or by an otherwise controlled current heat the plates to their Curie temperature or temperatures. The coil may be a flat spiral of thin conductive (copper) wire embedded in a thin layer of a heat conductive, electrically non-conductive material between said plates whereby heat energy generated in the coil is supplied to the heater plates. The dual plate heater may be employed to heat plastic pipes to their butt welding temperatures after which the heater is removed to the ends of the pipes to be joined are brought into contact under pressure. The dual plate heaters may also be employed in other arrangements such as shelves in a dispensing machine.Type: GrantFiled: December 27, 1994Date of Patent: June 18, 1996Assignee: Gas Research InstituteInventors: David M. Dickens, James B. Ross, Joel D. Finegan
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Patent number: 5231624Abstract: A system and method for recording on optical storage media utilize a beam projection assembly including a collimating lens and an objective lens. By providing an incident light beam having a substantially constant energy distribution to the objective lens, the radius of the spot projected on the optical media having an intensity greater than a threshold intensity may be increased. The radius may be further decreased by modifying the optics of the objective lens, typically by providing a center stop plate on the lens or by providing a one-half wavelength plate on the lens.Type: GrantFiled: August 1, 1991Date of Patent: July 27, 1993Assignee: Tandy CorporationInventor: Joel D. Finegan
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Patent number: 5208801Abstract: An optical recording system. The system is directed towards optical recording media which is responsive to at least two wavelengths of light such as an erase beam and a record beam. Light of a lower wavelength is produced by a divergent light source such as a diode and only partially collimated in a collimating lens. When the record and erase beams pass through a common objective for focusing on the recording media, the slightly divergent lower wavelength beam is focused at the same location as the fully collimated higher wavelength beam.Type: GrantFiled: August 23, 1991Date of Patent: May 4, 1993Assignee: Tandy CorporationInventor: Joel D. Finegan
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Patent number: 5200948Abstract: An optical storage medium is disclosed. In general, the storage medium includes a substrate, with a first, expansion layer, a second, reflective layer bonded to the first layer, and a third, retention layer bonded to the second layer, opposite the first layer. An opto-electronic system for recording data is also disclosed, along with a method of manufacture of the storage medium.Type: GrantFiled: January 10, 1989Date of Patent: April 6, 1993Assignee: Tandy CorporationInventors: Paul R. Goldberg, Bryan K. Clark, Joel D. Finegan, Robert Guerra
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Patent number: 5128921Abstract: A method and associated apparatus for providing improved data mark formation on an optical disc is disclosed. The amplitude of a laser write beam in an optical recording system is varied during application of the mark. Additionally, the illumination period of the laser is adjusted to account for differences between the actual length of a formed data mark and the desired length of a data mark.Type: GrantFiled: June 20, 1991Date of Patent: July 7, 1992Assignee: Tandy CorporationInventors: Hai-Hoa Van, Joel D. Finegan, Der-Chang Hsieh
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Patent number: 5043971Abstract: A method and associated apparatus for providing improved data mark formation on an optical disc is disclosed. The amplitude of a laser write beam in an optical recording system is varied during application of the mark. Additionally, the illumination period of the laser is adjusted to account for differences between the actual length of a formed data mark and the desired length of a data mark.Type: GrantFiled: September 28, 1989Date of Patent: August 27, 1991Assignee: Tandy CorporationInventors: Hai-Hoa Van, Joel D. Finegan, Der-Chang Hsieh
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Patent number: 5036511Abstract: An optical storage medium is disclosed. In general, the storage medium includes a substrate, with a first, expansion layer, a second, reflective layer bonded to the first layer, and a third, retention layer bonded to the second layer, opposite the first layer. An opto-electronic system for recording data is also disclosed, along with a method of manufacture of the storage medium.Type: GrantFiled: April 16, 1990Date of Patent: July 30, 1991Assignee: Tandy CorporationInventors: Paul R. Goldberg, Bryan K. Clark, Joel D. Finegan, Robert Guerra
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Patent number: 5016239Abstract: An optical storage medium is disclosed. In general, the storage medium includes a substrate, with a first, expansion layer, a second, reflective layer bonded to the first layer, and a third, retention layer bonded to the second layer, opposite the first layer. An opto-electronic system for recording data is also disclosed, along with a method of manufacture of the storage medium.Type: GrantFiled: October 2, 1989Date of Patent: May 14, 1991Assignee: Tandy CorporationInventors: Paul R. Goldberg, Bryan K. Clark, Joel D. Finegan, Robert Guerra
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Patent number: 5014259Abstract: An optical storage medium is disclosed. In general, the storage medium includes a substrate, with a first, expansion layer, a second, reflective layer bonded to the first layer, and a third, retention layer bonded to the second layer, opposite the first layer. An opto-electronic system for recording data is also disclosed, along with a method of manufacture of the storage medium.Type: GrantFiled: October 2, 1989Date of Patent: May 7, 1991Assignee: Tandy CorporationInventors: Paul R. Goldberg, Bryan K. Clark, Joel D. Finegan, Robert Guerra
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Patent number: 5001699Abstract: An optical storage medium is disclosed. In general, the storage medium includes a substrate, with a first, expansion layer, a second, reflective layer bonded to the first layer, and a third, retention layer bonded to the second layer, opposite the first layer. An opto-electronic system for recording data is also disclosed, along with a method of manufacture of the storage medium.Type: GrantFiled: October 2, 1989Date of Patent: March 19, 1991Assignee: Tandy CorporationInventors: Bryan K. Clark, Joel D. Finegan, Robert Guerra
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Patent number: 4918682Abstract: Optical data storage media of various technologies, particularly those with multiple layers of varying absorptivities of light include at least one polymer layer and a metal reflective layer. The metal reflective layer is constructed of an elemental metal or metal alloy having the desired reflective properties and which also softens or melts or both at, near or below the temperature reached by the polymer layer during recordation.Type: GrantFiled: February 5, 1988Date of Patent: April 17, 1990Assignee: Tandy CorporationInventor: Joel D. Finegan