Patents Represented by Attorney Stephen W. Buckingham
  • Patent number: 5575550
    Abstract: The present invention provides a pole light for directing or delivering light in a desired pattern to a surface proximate to the pole light. The present invention also provides a method for lighting a plurality of desired regions on a surface in a precise and predetermined pattern useful, for example, as a traffic management and guidance system.
    Type: Grant
    Filed: February 6, 1995
    Date of Patent: November 19, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Roger H. Appeldorn, Sanford Cobb, Jr., John F. Dreyer, Jr.
  • Patent number: 5551042
    Abstract: A daylighting system usable in either a skylight or a dormer includes a film having a plurality of negative Fresnel lenses.
    Type: Grant
    Filed: April 26, 1993
    Date of Patent: August 27, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Michael C. Lea, Paul A. Jaster
  • Patent number: 5497294
    Abstract: A conspicuity enhancer includes a case defining an optical cavity having an output optical window. The conspicuity enhancer also includes first and second linear light sources forming a V. Each linear light source has a light emitting device that inserts light into one end of the light source. The other end of each light source is attached to the case such that each linear light source is in optical communication with the optical cavity.
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: March 5, 1996
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: John F. Dreyer, Jr.
  • Patent number: 5471348
    Abstract: An optical device having a transparent body and including two prism surfaces formed thereon. The composite structure exhibits two axis stability in that the angular relationship between the input beam and the output beam remains fixed for slight movement of the device about two orthogonal axes.
    Type: Grant
    Filed: May 13, 1994
    Date of Patent: November 28, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Richard A. Miller, Kenneth A. Aho, John F. Dreyer, Jr.
  • Patent number: 5446768
    Abstract: Apparatus for use with a fiber optic data channel includes a configuration block that determines the configuration of a communication port associated with the apparatus. The apparatus further includes multiplexer/transmitter for transmitting data and configuration information to a distant apparatus and a receiver/demultiplexer for receiving data and configuration information from the distant apparatus.
    Type: Grant
    Filed: November 29, 1993
    Date of Patent: August 29, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Michael E. Griffin, Christopher R. Yungers
  • Patent number: 5432876
    Abstract: An optical fibre has a light emitting region. In the light emitting region are reflecting surfaces, at least one of which has a cross sectional area less than that of the fibre. Light striking the reflecting surfaces will be reflected out of the fibre.
    Type: Grant
    Filed: October 19, 1992
    Date of Patent: July 11, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Roger H. Appeldorn, Alan G. Hulme-Lowe, Michael C. Lea
  • Patent number: 5425119
    Abstract: A fiber optic connector includes a collapsible crimp ring, a rigid strain relief member, and a deformable strain relief member. The rigid strain relief member, in conjunction with the crimp ring, will grip protective filaments from an optical fiber cable if they are available. The deformable strain relief member will grip a buffered optical fiber when deformed by the crimp ring.
    Type: Grant
    Filed: September 23, 1993
    Date of Patent: June 13, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Nicholas A. Lee, Gordon D. Henson
  • Patent number: 5420958
    Abstract: A compact optical fiber distribution center has a housing provided by a pair of stackable containers. One container encloses a fiber connector zone in which a plurality of card-like modules are slidably mounted, normally aligned in single file, and each extending vertically when the distribution center is in use. The other container has a jumper routing zone at the front, a fiber routing zone at the rear, and an intermediate fiber storage zone which is divided by partitions, each of which is aligned with a space between adjacent modules. Each module carries a row of optical fiber connectors. At one side of the housing, the rear ends of the connectors can be connected to optical fibers of one or more feeder cables, and at the other side, the rear ends can be connected to optical fibers of one or more distribution cables.
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: May 30, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Gordon D. Henson, Michael A. Meis, Anthony J. Piekarczyk
  • Patent number: 5406403
    Abstract: A transmitter for a data communication system includes a self configuration register for storing information about the configuration of a local data communication port and a data input register for storing data received from the port to be transmitted and a multiplexer for multiplexing information stored in the self configuration register into configuration data packets and information stored in the data input register into message data packets and transmitting those data packets over an optical fiber. A receiver for a data communication system includes a demultiplexer, an-other configuration register and an output register. The demultiplexer receives data, demultiplexes it and stores it in the output register. The output register transmits information in configuration data packets to the other configuration register and information in message data packets to the local data port.
    Type: Grant
    Filed: September 14, 1992
    Date of Patent: April 11, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Michael E. Griffin, Christopher R. Yungers
  • Patent number: 5401913
    Abstract: A multi-layer circuit board includes electrical interconnections between adjacent circuit board layers of the multi-layer board. A via hole is provided through a circuit board layer. The via hole is filled with a via metal. The via metal is plated with a low melting point metal. An adhesive film is deposited over the circuit board layer. Adjacent layers of the multi-layer circuit board are stacked and aligned together. The layers are laminated under heat and pressure. The low melting point metal provides an electrical interconnection between adjacent layers.
    Type: Grant
    Filed: June 8, 1993
    Date of Patent: March 28, 1995
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Joel A. Gerber, Peter A. Gits
  • Patent number: 5355429
    Abstract: A strain relief apparatus for use with at least one optical fiber mounted between plies within a matrix of a generally planar laminated composite structure wherein the fiber extends from a surface of the composite structure. The apparatus has an anchor that has a distal portion, a proximal portion and an orifice extending therethrough, wherein the proximal portion is configured to be embedded within the composite structure with the distal portion extending from the composite structure and the optical fiber extending through the orifice. In one embodiment, protective cabling is adapted to be threaded over the optical fiber and the protective cabling is secured to the distal anchor portion to provide strain relief to the optical fiber. In another embodiment, a ferrule is adopted to extend over the optical fiber and is mounted within the distal anchor portion to protect the optical fiber.
    Type: Grant
    Filed: December 30, 1992
    Date of Patent: October 11, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Nicholas A. Lee, Gordon D. Henson
  • Patent number: 5337390
    Abstract: An adhesiveless optical fiber connector utilizes a mechanical gripping element to hold the fiber in place. The gripping element will receive an optical fiber when it is disengaged and hold the fiber when engaged. It is engageable by moving a plug in a direction transverse to the fiber.
    Type: Grant
    Filed: August 23, 1993
    Date of Patent: August 9, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Gordon D. Henson, Nicholas A. Lee
  • Patent number: 5309544
    Abstract: A luminaire includes a light pipe having an optical axis. The light pipe includes a tube with a structured outer surface and a smooth inner surface. A reflective light extractor is positioned in the tube such that light reflected by the extractor will strike the tube on a first side. The first side has a contour such that the direction of travel of light reflected by the extractor will have a projection in the plane perpendicular to the optical axis that makes a predetermined angle with the smooth surface.
    Type: Grant
    Filed: March 31, 1992
    Date of Patent: May 3, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Steven G. Saxe
  • Patent number: 5285314
    Abstract: A diffractive mirror has a plurality of diffractive zones at least one of which has an optical step having a height equal to j.lambda./2 and at least one of which has an optical step having a height equal to k.lambda./2 where .lambda. is a design wavelength of the mirror and j and k are unequal nonzero integers. Alternatively stated at least one of the optical steps induces a relative phase shift of 2j.pi. at the image point between two light rays emerging from a point source at the object point and striking the lens immediately on opposite sides of the step and at least one of the steps induces a relative phase shift of 2k.pi. at the image point between two light rays emerging from a point source at the object point and striking the lens immediately on opposite sides of that step.
    Type: Grant
    Filed: December 22, 1992
    Date of Patent: February 8, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: John A. Futhey
  • Patent number: 5267069
    Abstract: Apparatus for use with a fiber optic data channel includes a configuration block that determines the configuration of a communication port associated with the apparatus. The apparatus further includes multiplexer/transmitter for transmitting data and configuration information to a distant apparatus and a receiver/demultiplexer for receiving data and configuration information from the distant apparatus.
    Type: Grant
    Filed: September 15, 1992
    Date of Patent: November 30, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Michael E. Griffin, Christopher R. Yungers
  • Patent number: 5258896
    Abstract: A line light source has a light-emitting element that emits light into an insertion conduit. A light absorber absorbs light that makes greater than a predetermined angle with the axis of the light conduit.
    Type: Grant
    Filed: June 4, 1992
    Date of Patent: November 2, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: John F. Dreyer, Jr.
  • Patent number: 5254388
    Abstract: A louvered plastic film has louvers including central regions with a relatively high coefficients of extinction and outer regions with relatively low coefficients of extinction. Such a film provides a dramatic reduction in ghost images.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: October 19, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Jeffrey J. Melby, Scott G. Theirl
  • Patent number: 5237451
    Abstract: A beam shaping system for an astigmatic light source utilizes two lenses, both having diffractive power. A first lens shapes the beam in a first dimension and a second lens shapes the beam in a second dimension perpendicular to the first.
    Type: Grant
    Filed: November 4, 1992
    Date of Patent: August 17, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Steven G. Saxe
  • Patent number: 5229797
    Abstract: A lens according to the invention has diffractive power and two primary foci, where one focus is associated with the first diffractive order and one with the second diffractive order.
    Type: Grant
    Filed: August 8, 1990
    Date of Patent: July 20, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: John A. Futhey, Michael J. Simpson
  • Patent number: 5227916
    Abstract: An optical filter screen for a visual display monitor includes an optical filter supported by a support frame. A pair of adjustable mounting members support the support frame from the visual display monitor such that the optical filter is positioned adjacent a display area of the display monitor. Each mounting member includes a latch member that is movable between an unlatched state wherein the filter can be moved relative to the display area of the display monitor and a latched state wherein the filter is held in a desired position relative to the display area. Each mounting member further includes a movable latch operator for moving the latch member between the latched state and the unlatched state.
    Type: Grant
    Filed: May 13, 1992
    Date of Patent: July 13, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Scott G. Theirl, Gerald E. Drake