Patents by Inventor Ernest C. Wettstein

Ernest C. Wettstein 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).

  • Patent number: 6008834
    Abstract: A bouncing ball scanner is described which is a ball driven in a reciprocal motion for reflecting image-bearing light onto a photosensitive medium. The image-bearing light can be dictated by a computer, in which case the photosensitive medium may be film for a printed output, or the image-bearing light may be reflected from a subject having an image imprinted thereon, and the photosensitive medium may be a charge coupled device where the image is being read into a computer. The bouncing ball scanner comprises a ball being driven in a reciprocal motion by electromagnetic forces acting thereon. The motion of the bouncing ball is substantially linear in each direction so as to allow ease of calculation of ball position thereby ease of knowledge of pixel position on the photosensitive medium.
    Type: Grant
    Filed: November 30, 1995
    Date of Patent: December 28, 1999
    Assignee: Polaroid Corporation
    Inventors: John R. Lewis, Kestutius Norvaisa, Steve R. Gomez, Jacinto P. Carrera, Ernest C. Wettstein
  • Patent number: 4628809
    Abstract: Apparatus and method for forming radial orientation rare earth-transition metal magnets in continuous arc rings by hot isostatic pressing. A method includes the steps of compacting rare earth-transition metal powders having a particle size up to 40 microns into radially oriented rings in a mold provided with a radially aligning field, stacking a plurality of compacted radially oriented rings within an annular cavity within a sealed, evacuated canister to form a cylinder of a predetermined height, subjecting the canister to temperatures in the range of 900.degree. to 1150.degree. C. under a gas pressure of 15 kpsi to densify the compacts, and cooling the canister and the compacts to room temperature.
    Type: Grant
    Filed: August 5, 1985
    Date of Patent: December 16, 1986
    Assignee: The Charles Stark Draper Laboratory
    Inventors: Dilip K. Das, Kaplesh Kumar, Ernest C. Wettstein
  • Patent number: 4533407
    Abstract: Apparatus and method for forming radial orientation rare earth-transition metal magnets in continuous arc rings by hot isostatic pressing. A method includes the steps of compacting rare earth-transition metal powders having a particle size up to 40 microns into radially oriented rings in a mold provided with a radially aligning field, stacking a plurality of compacted radially oriented rings within an annular cavity within a sealed, evacuated cannister to form a cylinder of a predetermined height, subjecting the cannister to temperatures in the range of 900.degree. to 1150.degree. C. under a gas pressure of 15 kpsi to densify the compacts, and cooling the cannister and the compacts to room temperature.
    Type: Grant
    Filed: March 30, 1981
    Date of Patent: August 6, 1985
    Assignee: The Charles Stark Draper Laboratory, Inc.
    Inventors: Dilip K. Das, Kaplesh Kumar, Ernest C. Wettstein
  • Patent number: 4297388
    Abstract: Process and apparatus for forming plasma sprayed high density, high coercivity permanent magnet material and permanent magnets formed therefrom. The plasma sprayed permanent magnet material is obtained in a substantially amorphous state resulting from specifically controlled plasma spray parameters. The amorphous deposition possesses high coercivity, density and potential residual magnetism. The as-sprayed magnetic material is preferably heat treated and then densified to nearly maximum theoretical density. The amorphous structure permits retention of substantially all of the coercivity after heat treatment as well as densification to well over 95% of maximum theoretical density.
    Type: Grant
    Filed: April 8, 1980
    Date of Patent: October 27, 1981
    Assignee: The Charles Stark Draper Laboratory, Inc.
    Inventors: Kaplesh Kumar, Dilip K. Das, Ernest C. Wettstein
  • Patent number: 4056800
    Abstract: An axially aligned pair of spaced bucking coils energized to produce respective magnetic fields having cooperating radial components in an annular gap between the coils, and magnetic means for enhancing the radial components of the fields in the annular gap.
    Type: Grant
    Filed: December 11, 1975
    Date of Patent: November 1, 1977
    Assignee: Raytheon Company
    Inventors: Norman J. Dionne, Ernest C. Wettstein