Patents by Inventor Stephen Bridgman

Stephen Bridgman 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).

  • On-site analyzer having spark emission spectrometer with even-wearing electrodes
    Patent number: 6455850
    Abstract: An apparatus (10) for analyzing lubricant oils and functional fluids includes an optical emission spectrometer (OES) (26) having a substantially continuously valued wavelength versus intensity output (140). The OES (26) analyzes light captured from a spark emission stand (58) through which the fluid sample is flowed. An expert system (160-172) operates according to a set of Rules, and generates diagnostic text (174) for an operator based on the information about the fluid sample provided by the OES (26) and other measurement devices. The apparatus (10) includes an airflow passage (154) in the OES (26) spark enclosure that is characterized by airflow substantially parallel to the spark electrodes (128, 130) promoting even-wear of the electrodes.
    Type: Grant
    Filed: August 12, 1999
    Date of Patent: September 24, 2002
    Assignee: Global Technovations, Inc.
    Inventors: John Coates, Neil Rosenbaum, Stephen Bridgman