Patents by Inventor John L. de Yong

John L. de Yong 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).

  • Psychrometer
    Patent number: 4872340
    Abstract: A psychrometer having transducers producing two electrical signals respectively representing dry bulb temperature and wet bulb temperature, and an electrical circuit operating to derive a signal representing relative humidity in accordance with the formula: ##EQU1## where RH is the relative humidityt is the dry bulb temperaturet' is the web bulb temperature and.alpha.,.beta.,.gamma.,.alpha.',.beta.', and .gamma.' are constants.The constants are chosen to give accurate results over the desired operating range of the psychrometer.
    Type: Grant
    Filed: August 20, 1981
    Date of Patent: October 10, 1989
    Assignee: Commonwealth Scientific and Industrial Research Organization
    Inventor: John L. de Yong