Patents by Inventor William J. Keezer

William J. Keezer 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).

  • Loudspeaker installing
    Patent number: 5574796
    Abstract: A mount for mounting a loudspeaker in a room boundary structure having an outside surface away from the inside of the room includes a frame constructed and arranged to rest on the outside surface. A spring has a first end attached to the frame and a free second end. The spring is constructed and arranged to exert a unidirectional force toward the outside surface whenever the second end of the spring is displaced from the outside surface toward the inside of the room.
    Type: Grant
    Filed: August 18, 1994
    Date of Patent: November 12, 1996
    Assignee: Bose Corporation
    Inventor: William J. Keezer
  • Enhancing bass
    Patent number: 4984273
    Abstract: A circuit controls the sound pressure level produced by a separate bass transducer in a multi-channel audio system having a number of upper frequency channels such that the perceived frequency response of the system remains substantially constant.
    Type: Grant
    Filed: August 31, 1989
    Date of Patent: January 8, 1991
    Assignee: Bose Corporation
    Inventors: J. Richard Aylward, Timothy Holl, William J. Keezer
  • Electroacoustical transducer
    Patent number: 4577069
    Abstract: A loudspeaker driver has a molded plastic basket and a stamped octagonal front pole plate of low reluctance magnetic material molded into the base of the basket. The break edge of the stamped pole plate is used as an undercut for encapsulation. A similar rear octagonal pole plate is employed.
    Type: Grant
    Filed: July 7, 1978
    Date of Patent: March 18, 1986
    Assignee: Bose Corporation
    Inventor: William J. Keezer
  • Dynamic loudspeaker with plastic basket encapsulating front pole plate
    Patent number: 4158756
    Abstract: A loudspeaker driver has a molded plastic basket made of thermoplastic polyester with 20-30% glass fill and a stamped octagonal front pole plate of low reluctance magnetic material molded into the base of the basket with a keyed central bore. The break edge of the stamped pole plate is used as an undercut for encapsulation. The basket is formed with three tabs spaced equiangularly about the periphery for attachment to the baffle. Accurate upstanding rims extend between the tabs for making engagement with rim segments in a baffle to effect an essentially fluid-tight attachment of the driver to the baffle using snap-in techniques. The tabs are also formed with openings for accommodating screws or other fastening elements to fasten the driver in place with more conventional techniques. Radial ribs extend downward then radially inward from each tab. An exceptionally flat annular surface is just inside the tabs for accommodating the edge of the diaphragm or cone, the roll of which may be either concave or convex.
    Type: Grant
    Filed: August 27, 1976
    Date of Patent: June 19, 1979
    Assignee: Bose Corporation
    Inventor: William J. Keezer