Patents Assigned to Graham Magnetics Incorporated
  • Patent number: 4605835
    Abstract: 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: Grant
    Filed: May 21, 1984
    Date of Patent: August 12, 1986
    Assignee: Graham Magnetics Incorporated
    Inventor: Robert J. Deffeyes
  • Patent number: 4548840
    Abstract: 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: Grant
    Filed: June 15, 1984
    Date of Patent: October 22, 1985
    Assignee: Graham Magnetics Incorporated
    Inventors: Kenneth H. States, Walter W. Smith
  • Patent number: 4541579
    Abstract: 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: Grant
    Filed: September 29, 1982
    Date of Patent: September 17, 1985
    Assignee: Graham Magnetics Incorporated
    Inventors: James W. Essary, Robert A. Sanderson
  • Patent number: 4494878
    Abstract: 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: Grant
    Filed: July 14, 1983
    Date of Patent: January 22, 1985
    Assignee: Graham Magnetics Incorporated
    Inventor: Charles E. Rainey, Jr.
  • Patent number: 4491485
    Abstract: 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: Grant
    Filed: June 13, 1983
    Date of Patent: January 1, 1985
    Assignee: Graham Magnetics Incorporated
    Inventor: Robert A. Sanderson
  • Patent number: 4463030
    Abstract: 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: Grant
    Filed: December 24, 1980
    Date of Patent: July 31, 1984
    Assignee: Graham Magnetics Incorporated
    Inventors: Robert J. Deffeyes, Harris W. Armstrong
  • Patent number: 4447274
    Abstract: 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: Grant
    Filed: March 17, 1982
    Date of Patent: May 8, 1984
    Assignee: Graham Magnetics Incorporated
    Inventor: Neil Matheson, III
  • Patent number: 4416702
    Abstract: 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: Grant
    Filed: April 9, 1982
    Date of Patent: November 22, 1983
    Assignee: Graham Magnetics, Incorporated
    Inventor: James E. Jackman
  • Patent number: 4268302
    Abstract: 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: Grant
    Filed: July 2, 1979
    Date of Patent: May 19, 1981
    Assignee: Graham Magnetics Incorporated
    Inventors: Robert J. Deffeyes, Wesley R. Tyler
  • Patent number: 4255807
    Abstract: 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: Grant
    Filed: December 18, 1978
    Date of Patent: March 10, 1981
    Assignee: Graham Magnetics Incorporated
    Inventor: Phillip A. Cosby
  • Patent number: 4251275
    Abstract: 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: Grant
    Filed: June 18, 1979
    Date of Patent: February 17, 1981
    Assignee: Graham Magnetics Incorporated
    Inventors: Robert J. Deffeyes, Harris W. Armstrong
  • Patent number: 4242954
    Abstract: 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: Grant
    Filed: May 23, 1978
    Date of Patent: January 6, 1981
    Assignee: Graham Magnetics Incorporated
    Inventor: Gordon L. McDaniel
  • Patent number: 4213223
    Abstract: 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: Grant
    Filed: October 5, 1978
    Date of Patent: July 22, 1980
    Assignee: Graham Magnetics Incorporated
    Inventor: Phillip A. Cosby
  • Patent number: 4137361
    Abstract: 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: Grant
    Filed: March 30, 1977
    Date of Patent: January 30, 1979
    Assignee: Graham Magnetics Incorporated
    Inventors: Robert J. Deffeyes, Grover L. Johnson
  • Patent number: 4092459
    Abstract: 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: Grant
    Filed: January 13, 1975
    Date of Patent: May 30, 1978
    Assignee: Graham Magnetics Incorporated
    Inventors: Robert J. Deffeyes, Grover Lee Johnson
  • Patent number: 4091924
    Abstract: 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: Grant
    Filed: January 2, 1976
    Date of Patent: May 30, 1978
    Assignee: Graham Magnetics Incorporated
    Inventor: Gerald S. Newton
  • Patent number: 4075672
    Abstract: 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: Grant
    Filed: February 9, 1976
    Date of Patent: February 21, 1978
    Assignee: Graham Magnetics Incorporated
    Inventor: William A. Manly
  • Patent number: 4061824
    Abstract: 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: Grant
    Filed: September 12, 1975
    Date of Patent: December 6, 1977
    Assignee: Graham Magnetics Incorporated
    Inventors: Robert J. Deffeyes, Wesley R. Tyler
  • Patent number: 4036360
    Abstract: 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: Grant
    Filed: November 12, 1975
    Date of Patent: July 19, 1977
    Assignee: Graham Magnetics Incorporated
    Inventor: Robert J. Deffeyes
  • Patent number: 4020227
    Abstract: 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: Grant
    Filed: June 16, 1976
    Date of Patent: April 26, 1977
    Assignee: Graham Magnetics Incorporated
    Inventor: Robert J. Deffeyes