Patents by Inventor Henry A. Pearce, Jr.

Henry A. Pearce, Jr. 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).

  • Optical fiber sensor with light absorbing moisture-sensitive coating
    Patent number: 4894532
    Abstract: An optical fiber moisture sensor is prepared by coating an optical fiber with a thin film of plasma polymerized hexamethyldisiloxane and ammonia, approximately 1-2 .mu.m thick. The light transmission characteristics of such a coated optical fiber change as a function of moisture conditions in an environment to which the coating is exposed. Accordingly, the coated optical fiber may be utilized by sensing changes in moisture conditions in an environment by being placed in the environment, causing light to be transmitted through the fiber and detecting changes in the light transmitted through the fiber as a function of the moisture conditions in the environment.
    Type: Grant
    Filed: March 28, 1988
    Date of Patent: January 16, 1990
    Assignee: Westinghouse Electric Corp.
    Inventors: Steven H. Peterson, Alfred R. Pebler, Rajender K. Sadhir, Henry A. Pearce Jr., C. Clair Claiborne
  • Gas-in-oil monitoring apparatus and method
    Patent number: 4890478
    Abstract: An on-line gas-in-oil monitoring apparatus and method extracts certain reducing or combustible gases from oil and detects their presence and concentration substantially simultaneously using a sensor. The sensors are sintered metal oxide semi-conductors with adsorbed oxygen. The presence of a reducing or combustible gas proportionally increases the conductivity of the semi-conductor. Any resultant change in conductivity indicates the presence and concentraton of the reducing or combustible gas in the semi-conductor. After the analytical cycle the sensors are regenerated by exposure to oxygen.
    Type: Grant
    Filed: September 11, 1987
    Date of Patent: January 2, 1990
    Assignee: Westinghouse Electric Corp.
    Inventors: C. Clair Claiborne, Robert A. Kurz, Henry A. Pearce, Jr., Harry R. Sheppard
  • Insulated conductor
    Patent number: 4415629
    Abstract: Disclosed is a method of making an insulated conductor by coating a conductor with a triazole and applying the insulation over the triazole coating. The triazole is preferably benzyltriazole or tolyltriazole. It can be applied dissolving the triazole in water, immersing the conductor in the solution and evaporating the water. The invention is particularly useful with epoxy powder coatings on copper conductors which are used in perchloroethylene containing insulating fluid.
    Type: Grant
    Filed: March 22, 1982
    Date of Patent: November 15, 1983
    Assignee: Electric Power Research Institute, Inc.
    Inventors: Anthony J. Palumbo, Henry A. Pearce, Jr., Curtis L. Moore
  • Transformer using catalytically hydrogenated bright stock fluid
    Patent number: 4240917
    Abstract: A transformer is disclosed which comprises a tank comprising a laminated magnetic core and a winding immersed in a fluid which comprises bright stock catalytically hydrogenated to an aromaticity of 5 to 30 percent. This fluid provides inexpensive insulation for transformers without the need for additives to obtain acceptable physical and electrical properties.
    Type: Grant
    Filed: April 6, 1979
    Date of Patent: December 23, 1980
    Assignee: Westinghouse Electric Corp.
    Inventors: Henry A. Pearce, Jr., Edward J. Walsh