Patents Represented by Attorney Daniel W. Ernsberger

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  • Pipe closure
    Patent number: 5850854
    Abstract: A reusable pipe closure is constructed using an O-ring end cap and split collar. In practice the end cap and O-ring are inserted over the end of a pipe, the split collar is placed over the end cap and the end of the pipe and the two halves of the split collar are closed; securely compressing the collar around the pipe.
    Type: Grant
    Filed: October 2, 1997
    Date of Patent: December 22, 1998
    Inventor: Norman Lee Carroll
  • Alignment extensiometer with double compression fittings
    Patent number: 5503025
    Abstract: An alignment extensiometer is shown which attaches to a material testing sample by means of a hinged split cross head and a movable split insert. The extensiometer is used to reduce sample damage and set up time.
    Type: Grant
    Filed: September 1, 1993
    Date of Patent: April 2, 1996
    Assignee: Applied Test Systems Inc.
    Inventors: Norman L. Carroll, Willard L. Pearce
  • Variable capacitance
    Patent number: 4914543
    Abstract: A variable area capacitance transducer for measurement of length and displacement is disclosed. The preferred embodiment uses three concentric cylinders. The innermost cylinder acts as a working electrode, the middle cylinder acts as a common electrode, and the outer cylinder, a reference electrode. A movable concentric cylinder acts as a shield and is guided for movement between the working and common electrodes. The capacitance of the transducer is related to the displacement of the shield.
    Type: Grant
    Filed: July 20, 1989
    Date of Patent: April 3, 1990
    Inventors: Norman L. Carroll, Gregory A. Bertone, Willard L. Pearce