Patents by Inventor Erazm A. Willy

Erazm A. Willy 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).

  • Electroacoustic transducer having a variable thickness diaphragm
    Patent number: 4532383
    Abstract: To provide for good wide range frequency response utilizing only a single lightweight diaphragm in a peripherally-driven electroacoustic transducer, the diaphragm is made with a variable thickness. The region along the peripheral edge of the diaphragm is the thinnest portion of the diaphragm. From this peripheral edge, the thickness gradually increases to a point of maximum thickness in a portion of the diaphragm other than the periphery. The taper can be such as to provide a diaphragm with either two convex surfaces or with one convex surface and one concave surface. Alternatively, the taper could be linearly. A further embodiment provides for an air-filled diaphragm made of two sheets of thin material with a valve arrangement to allow for rapid self-inflation of the diaphragm.
    Type: Grant
    Filed: January 4, 1980
    Date of Patent: July 30, 1985
    Inventor: Erazm A. Willy
  • Speaker diaphragm
    Patent number: D286399
    Type: Grant
    Filed: June 2, 1983
    Date of Patent: October 28, 1986
    Inventor: Erazm A. Willy
  • Combined speaker diaphragm and baffle therefor
    Patent number: D286771
    Type: Grant
    Filed: June 2, 1983
    Date of Patent: November 18, 1986
    Inventor: Erazm A. Willy