Patents by Inventor Thomas Archbold

Thomas Archbold 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).

  • Gas detectors
    Patent number: 4173886
    Abstract: This invention relates to portable gas detectors having means for aspirating a sample of the atmosphere to be tested into the vicinity of two sensor devices, and including a water-trap comprising valve means arranged, in response to a drop in pressure in the flow line when water is accidentally sucked in with an aspirated sample, to temporarily close the sample flow path or to open a by-pass for detecting the presence of both natural gas and manufactured gas in the atmosphere.
    Type: Grant
    Filed: June 27, 1978
    Date of Patent: November 13, 1979
    Assignee: British Gas Corporation
    Inventors: Thomas Archbold, Michael R. G. Sharp