Patents by Inventor Harvey A. Cherry

Harvey A. Cherry 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).

  • Method and apparatus for continuous frequency measurement
    Patent number: 4130799
    Abstract: A method for providing a continuous binary coded output measurement of an unknown input frequency or pulse rate. The unknown pulse rate is compared against a first known frequency and an output is obtained in binary coded form which is functionally related to the approximate ratio of the unknown pulse rate to the known pulse rate. A second unknown pulse rate equal to the difference between the unknown pulse rate and the ratio times the known pulse rate is generated. The unknown input pulse rate or the second unknown pulse rate is then transferred to a second stage when the ratio is less than one or greater than one respectively. A series of such comparisons are made to obtain an approximate value for the unknown pulse rate to a predetermined resolution.Apparatus is provided for receiving and continuously providing an output measurement for an unknown input frequency. A clock circuit provides a plurality of known frequencies having a predetermined interrelationship.
    Type: Grant
    Filed: July 5, 1977
    Date of Patent: December 19, 1978
    Inventor: Harvey A. Cherry