Patents by Inventor Charles F. Hackett

Charles F. Hackett 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: 4486872
    Abstract: The in-arm stylus cleaner includes a cleaner arm mounted for to-and-fro motion in the stylus arm carriage. To clean the stylus, the cleaner arm is retracted, the reproducing stylus is raised back up into the carriage arm, the cleaner arm is freed to allow a wiping element mounted thereon to sweep the stylus tip, and the stylus is then gently lowered onto a turntable-disposed record to resume playback operations.
    Type: Grant
    Filed: September 28, 1982
    Date of Patent: December 4, 1984
    Assignee: RCA Corporation
    Inventors: Charles F. Hackett, Eric A. Brauer, Kevin C. Kelleher, Richard R. Wright
  • Patent number: 4282298
    Abstract: A photosensitive member having at least two electrically operative layers. The first layer comprises a photoconductive layer which is capable of photogenerating and injecting photo-excited holes into a contiguous active layer. The active layer comprises a transparent organic material which is substantially non-absorbing in the spectral region of intended use, but which is "active" in that it allows injection of photo-excited holes from the photoconductive layer, and allows these holes to be transported through the active layer. This structure may be imaged in the conventional xerographic mode which usually includes charging, exposure to light, and development.
    Type: Grant
    Filed: June 20, 1973
    Date of Patent: August 4, 1981
    Assignee: Xerox Corporation
    Inventors: Michael Smith, Charles F. Hackett, Richard W. Radler