Patents by Inventor Vivian C. Watts

Vivian C. Watts 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).

  • Contact testing device
    Patent number: 5124647
    Abstract: For detecting whether a probe (P) is in contact with an electrical circuit under test (U), capacitance measurement means (M) measures the capacitance between the probe and a reference (G), without the probe contacting the circuit. The measured capacitance is stored in control circuitry (T) and then a capacitance value is measured between the probe and the reference with the probe in a position in which it is assumed to be in contact with the circuit, the control circuitry comparing the measured value with the stored capacitance.
    Type: Grant
    Filed: February 7, 1991
    Date of Patent: June 23, 1992
    Assignee: Bath Scientific Limited
    Inventor: Vivian C. Watts
  • Testing electrical circuits
    Patent number: 5006808
    Abstract: A method of testing for short circuits between networks of a printed circuit board comprising a plurality of such networks comprises measuring an impedance value between each of the networks and a ground plane of the board, using a pair of probes; and, also using the probes, effecting tests for short circuits only between any two networks for which the measured impedance value is substantially the same and for which this measured impedance value is greater than a predicted lowest impedance for the two networks to be short-circuited together.
    Type: Grant
    Filed: August 22, 1989
    Date of Patent: April 9, 1991
    Assignee: Bath Scientific Limited
    Inventor: Vivian C. Watts
  • Electrical testing probe
    Patent number: 4987364
    Abstract: For contacting electrical pads of different geometries, an electrical testing probe including a probe body which is generally laminar and which tapers downwardly to provide a contact portion; and a carrying member which carries said probe body.
    Type: Grant
    Filed: December 12, 1989
    Date of Patent: January 22, 1991
    Assignee: Bath Scientific Limited
    Inventor: Vivian C. Watts