Patents by Inventor John E. Spencer

John E. Spencer 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: 4492443
    Abstract: A disk film camera which is of simple, compact and inexpensive construction and yet which provides one-button operation to locate the film, expose the film, disengage the film and advance the next frame. The camera requires no separate operation to initialize a cartridge when it is loaded into the camera. A photographer is free to change his mind about taking a picture at any time after moving the shutter button until the shutter is actually released, without adversely affecting the operation of the camera, such as by jamming it or by placing any component of the camera (such as a spring) in a stressed condition for an indeterminate period of time.
    Type: Grant
    Filed: June 2, 1983
    Date of Patent: January 8, 1985
    Assignee: Eastman Kodak Company
    Inventors: John E. Spencer, Reginald S. Greene, Terrence L. Fisher
  • Patent number: 4360756
    Abstract: In a high intensity metal halide discharge lamp utilizing thorium in conjunction with a transport cycle for electrode activation, a getter, preferably cadmium or zinc is added to the lamp fill for the purpose of reducing the concentration of free iodine during operation. By so doing, deposition of thorium on the electrode tip during operation is assured and performance and maintenance are improved. The quantity of getter may include a portion supplied as a corrective measure to scavenge excess iodine released during manufacture, and another portion providing a long-term buffering capacity for capturing iodine released during the lamp's life by reaction of the dose, particularly ScI.sub.3 and ThI.sub.4, with the SiO.sub.2 of the lamp envelope.
    Type: Grant
    Filed: November 13, 1979
    Date of Patent: November 23, 1982
    Assignee: General Electric Company
    Inventors: John E. Spencer, Ashok K. Bhattacharya