Patents Assigned to Graham Magnetics Incorporated
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Patent number: 4605835Abstract: A process for attaching silver-bearing body electrodes of a multi-layer capacitor blank to a terminating material by using high-intensity heat source to fuse the terminal material to the capacitor blank and body electrode edges exposed on the surface of said blank. A particular advantage is avoidance of silver-migration from the body electrodes.Type: GrantFiled: May 21, 1984Date of Patent: August 12, 1986Assignee: Graham Magnetics IncorporatedInventor: Robert J. Deffeyes
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Patent number: 4548840Abstract: Novel coating apparatus and method whereby a coating transfer roll is utilized as part of the coating composition reservoir and kinetic energy from said roll is a principal and effective means to keep the coating composition effectively agitated.Type: GrantFiled: June 15, 1984Date of Patent: October 22, 1985Assignee: Graham Magnetics IncorporatedInventors: Kenneth H. States, Walter W. Smith
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Patent number: 4541579Abstract: A clutch means particularly useful in the rapid and precise alignment of a large number of rotating members such as take-up reels on a single shaft. Each rotating member, e.g., each reel-hub member, is positively engaged by a resilient and non-fouling spring member which is readily inserted into conventional clutch means and which comprises a cam means to facilitate the sliding passage of a number of reels onto a shaft as well as locking means to couple the clutch means and the reels to be rotated thereon.Type: GrantFiled: September 29, 1982Date of Patent: September 17, 1985Assignee: Graham Magnetics IncorporatedInventors: James W. Essary, Robert A. Sanderson
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Patent number: 4494878Abstract: A quickly and easily assembled, fastener-free baffle system for use with agitated reaction vessels. The novel baffle system is characterized by its ability to be disassembled into easily-cleanable parts, its lack of independent fastening means such as screws, welds, rivets, etc. and the easy interchangeability of its parts.Type: GrantFiled: July 14, 1983Date of Patent: January 22, 1985Assignee: Graham Magnetics IncorporatedInventor: Charles E. Rainey, Jr.
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Patent number: 4491485Abstract: A web, for instance magnetic tape, is cleaned by pulling it across a plurality of scraper bars. Simultaneously, a cleaning fluid such as air is moved from below the web, upwardly and laterally across its downwardly facing front surface, while cleaning fluid is also moved from above said web, laterally away from the web and downwardly past the side edges of the web.Type: GrantFiled: June 13, 1983Date of Patent: January 1, 1985Assignee: Graham Magnetics IncorporatedInventor: Robert A. Sanderson
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Patent number: 4463030Abstract: A novel silver powder paint composition characterized by a very low fusion, or film-forming temperature, probably assignable to the relatively small amount of oxides or other undesirable occulsions within coatings formed of the powder. The invention also relates to a new process for forming such a powder; the process is believed to involve the formation of a fatty-acid silver reaction product of the surface on the silver powder before it is subjected to fusion into a metallic coating. During fusion the decomposing reactant seems to act as a flux aiding the formation of a metal film of superior appearance and strength.Type: GrantFiled: December 24, 1980Date of Patent: July 31, 1984Assignee: Graham Magnetics IncorporatedInventors: Robert J. Deffeyes, Harris W. Armstrong
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Patent number: 4447274Abstract: Nickel powders having an improved chemical stability are formed by reaction with an electroconductive coating such as a carbide, a silicide, or the like and, also, a reaction with sulfur.Type: GrantFiled: March 17, 1982Date of Patent: May 8, 1984Assignee: Graham Magnetics IncorporatedInventor: Neil Matheson, III
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Patent number: 4416702Abstract: Improved apparatus for cleaning generally cylindrical articles of irregular configuration and, particularly, for cleaning straps of the type used to hold magnetic tape and supplied by manufacturers for use with magnetic tapes. The apparatus comprises a porous cleaning element comprised of multiple felt-cleaning faces resiliently mounted for contact with the inside of the cylinder, or ring, of the strap. The porous elements form means to remove dirt from the article being cleaned without any accumulation of excess dirt on the cleaning head.Type: GrantFiled: April 9, 1982Date of Patent: November 22, 1983Assignee: Graham Magnetics, IncorporatedInventor: James E. Jackman
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Patent number: 4268302Abstract: Improved processes and products based on the discovery that metal atoms in complex relationship with complexing agents can be used to moderate the formation of organic salt seed crystals which promote an exceptionally well-ordered acicular growth of organometallic salts such as oxalates of the metal. Some acicular, i.e., needle-like, products have particular utility for being reduced to ferromagnetic metal particles which retain a surprisingly large degree of acicularity and possess extraordinarily favorable properties for use in magnetic recording applications.Type: GrantFiled: July 2, 1979Date of Patent: May 19, 1981Assignee: Graham Magnetics IncorporatedInventors: Robert J. Deffeyes, Wesley R. Tyler
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Patent number: 4255807Abstract: Process and apparatus for detecting and evaluating defects in memory-retaining characteristics of magnetic tape, said process and apparatus providing means for sensing an initial error in a first track of the tape and then relating the initial error to all other errors which are sensed in other tracks of the tape within a preselected segment of tape the start of which coincides with the location of the initial error. Each of the other sensed errors within the segment defined by the initial error defines its own error evaluation segment over which it is evaluated. Thus, depending upon the error content of the tape, a plurality of overlapping error evaluation segments may be defined. Each error sensed on the tape is processed and categorized as either a one-, two- or three-track error depending upon the number of other track errors sensed within its segment. The apparatus includes means for counting and reporting the number of each type of error sensed on the tape.Type: GrantFiled: December 18, 1978Date of Patent: March 10, 1981Assignee: Graham Magnetics IncorporatedInventor: Phillip A. Cosby
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Patent number: 4251275Abstract: A silver paint having a maximum viscosity of 300 cps and containing particulate silver produced by thermal decomposition of a carboxylic acid salt of silver.Type: GrantFiled: June 18, 1979Date of Patent: February 17, 1981Assignee: Graham Magnetics IncorporatedInventors: Robert J. Deffeyes, Harris W. Armstrong
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Patent number: 4242954Abstract: A high-precision, metal-faced, calendar roll which can be readily reconditioned by thermal means. The calendar roll has a surface which is advantageously formed of that class of nickel-titanium alloys having thermally-responsive shape memory properties. The calendar roll is particularly useful in avoiding time consuming repair and undesirably prolonged runs in making high quality magnetic tape.Type: GrantFiled: May 23, 1978Date of Patent: January 6, 1981Assignee: Graham Magnetics IncorporatedInventor: Gordon L. McDaniel
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Patent number: 4213223Abstract: Apparatus for cleaning generally cylindrical articles of irregular configuration and, particularly, for cleaning straps of the type used to hold magnetic tape and supplied by manufacturers for use with magnetic tape. The apparatus comprises exterior and interior nozzles resiliently mounted along the inside and outside of the cylinder, or ring, and form means to blow and suck dirt from the article being cleaned.Type: GrantFiled: October 5, 1978Date of Patent: July 22, 1980Assignee: Graham Magnetics IncorporatedInventor: Phillip A. Cosby
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Patent number: 4137361Abstract: Novel powders, and resinous compositions bearing said powders, characterized by excellent chemical stability, electrical conductivity, and energy-absorbing characteristics. These three characteristics can be utilized, alone or combination, in forming many novel articles including microwave shielding apparatus, magnetic recording media, explosives, and the like articles. The more advantageous powders are characterized by a very thin coating of an electrically conductive metal carbide, metal silicide, or metal boride upon the surface thereof, and a metal core.Type: GrantFiled: March 30, 1977Date of Patent: January 30, 1979Assignee: Graham Magnetics IncorporatedInventors: Robert J. Deffeyes, Grover L. Johnson
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Patent number: 4092459Abstract: Novel powders, and resinous compositions bearing said powders, characterized by excellent chemical stability, electrical conductivity, and energy-absorbing characteristics. These three characteristics can be utilized, alone or combination, in forming many novel articles including microwave shielding apparatus, magnetic recording media, explosives, and the like. The more advantageous powders are characterized by a very thin coating of an electrically conductive metal carbide, metal silicide, or metal boride upon the surface thereof, and a metal core.Type: GrantFiled: January 13, 1975Date of Patent: May 30, 1978Assignee: Graham Magnetics IncorporatedInventors: Robert J. Deffeyes, Grover Lee Johnson
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Patent number: 4091924Abstract: An improved magnetic tape having the property of retaining magnetic data even when spooled and subjected to high temperature environments. This thermal resistance is suitably achieved by providing a backing coating which contacts the magnetic-particle-bearing facing coating of the tape and is chemically incompatible therewith. Pairs of chemically-incompatible coatings include polyester polyurethane-polyether-polyurethane; polyfluorinated hydrocarbons-polyurethane. A conductive furnace carbon black is advantageously used in the backing coating, and the substrate is, suitably, temperature-resistant polyimide.Type: GrantFiled: January 2, 1976Date of Patent: May 30, 1978Assignee: Graham Magnetics IncorporatedInventor: Gerald S. Newton
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Patent number: 4075672Abstract: An improved magnetic recording member of the disc type. The article of the invention is formed, preferably, of metallic magnetic particles oriented in a vertical direction. This combination overcomes existing limitations on (a) disc products, and (2) the preferred metallic particles heretofore known.Type: GrantFiled: February 9, 1976Date of Patent: February 21, 1978Assignee: Graham Magnetics IncorporatedInventor: William A. Manly
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Patent number: 4061824Abstract: Improved processes and products based on the discovery that metal atoms in complex relationship with complexing agents can be used to moderate the formation of organic salt seed crystals which promote an exceptionally well-ordered acicular growth of organometallic salts such as oxalates of the metal. Some acicular, i.e. needle-like, products have particular utility for being reduced to ferromagnetic metal particles which retain a surprisingly large degree of acicularity and possess extraordinarily favorable properties for use in magnetic recording applications.Type: GrantFiled: September 12, 1975Date of Patent: December 6, 1977Assignee: Graham Magnetics IncorporatedInventors: Robert J. Deffeyes, Wesley R. Tyler
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Patent number: 4036360Abstract: A package comprising a dessicant material consisting essentially of 1 a dessicant and 2 tough, film-forming, resin having a high moisture vapor transmission rate. A prepolymerized polyurethane is particularly useful. The material is of particular value as a package insert - e.g. with film or cameras or as a coating material which can be utilized on equipment to be protected or, most advantageously, on the interior walls of packaging boxes and the like.Type: GrantFiled: November 12, 1975Date of Patent: July 19, 1977Assignee: Graham Magnetics IncorporatedInventor: Robert J. Deffeyes
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Patent number: 4020227Abstract: Magnetic tape having extraordinary performance characteristics and formed with a sparingly-crosslinked, polyurethane-based polymer binder system as a matrix for magnetic particles. The binder system is characterized by toughness of at least 150 in-lbs. per in.sup.3, and the ability to withstand video tape-Test for over an hour before any substantial tape degradation occurs. Magnetic coatings prepared according to the invention comprise a binder system of at least 50% of a tough polyurethane.Type: GrantFiled: June 16, 1976Date of Patent: April 26, 1977Assignee: Graham Magnetics IncorporatedInventor: Robert J. Deffeyes