Patents by Inventor Samuel D. Ferguson

Samuel D. Ferguson 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).

  • Apparatus for sensing the temperature of a thermoplastic sheet in a differential pressure forming machine
    Patent number: 5263839
    Abstract: Apparatus the temperature of a thermoplastic sheet including a hollow wave guide having a bend therein, for receiving and transmitting infrared energy emitted by the sheet between a sheet heater at a sheet forming station and differential pressure forming apparatus at a forming station. One end of the hollow channel is mounted adjacent the sheet. At the opposite end of the hollow channel, a plurality of infrared energy sensors is mounted for sensing the infrared energy. Infrared sensors include mechanism for converting the infrared energy to electrical energy to operate a control system which controls the level of electrical power to the heater and thus controls the temperature of the sheet.
    Type: Grant
    Filed: November 5, 1991
    Date of Patent: November 23, 1993
    Assignee: Trafalgar House Inc.
    Inventors: David J. Robinson, Samuel D. Ferguson