Patents by Inventor Marland J. Ratekin

Marland J. Ratekin 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).

  • Temperature controlled soldering iron having low tip leakage voltage
    Patent number: 5122637
    Abstract: A temperature controlled soldering iron includes an elongated heater assembly with a hollow soldering tip at one end, containing a heating element and a temperature sensing element, which is responsive to the temperature of the tip. The heater assembly includes an outer conductive sheath concentrically disposed around an inner conductive sheath, both of which are attached to a steel bushing. A constantan rod is disposed within the inner sheath and connected to the bushing to form a thermocouple junction therewith. The heating element is connected at one end to the bushing and at the other end to a tubular conductor disposed around and insulated from the constantan wire. A temperature controller surveys the temperature sensed at the thermocouple junction by connection to the constantan wire and the outer sheath. The voltage applied between the tubular conductor and the inner sheath is automatically varied to control the temperature of the heater assembly.
    Type: Grant
    Filed: January 11, 1991
    Date of Patent: June 16, 1992
    Assignee: Wellman Thermal Systems Corporation
    Inventors: Bruce D. Bottorff, Robert A. Longstreet, Marland J. Ratekin