Patents by Inventor Adrianus Josephus Smulders

Adrianus Josephus Smulders 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).

  • Patent number: 5679900
    Abstract: A vibration detecting and condition monitoring system for the press section, including felts, rollers and presses, employing a feature extracting circuit having a selectable plurality of Bessel type bandpass filters and an enveloping circuit to square the bandpassed signal output prior to FFT analysis of the signal. The system enables the enhancement and detection of highly impulsive signals in the frequency domain, that are indicative of defects in machinery operation.
    Type: Grant
    Filed: April 12, 1995
    Date of Patent: October 21, 1997
    Assignee: SKF Condition Monitoring
    Inventor: Adrianus Josephus Smulders
  • Patent number: 4061908
    Abstract: The invention provides a compact test sequence for testing integrated memories. First, all storage positions are filled with the bit "0". Subsequently, in a given order of the addresses, the "0" bit written for each address is read; immmediately thereafter a "1" bit is written in those bit positions. The positions are again tested by reading the "1" bits. When the last address of the predetermined order is reached, the "1" is read in the same order for each address. Subsequently a "0" is written, which is finally tested by reading again. When the last address is reached, all addresses are read in the reverse order, and a "1" is written, which is tested again. When the first address is reached, all addresses are read, filled with a "0" and tested. This process may be repeated as many times as there are bits in the address. The significance of the address bits are modified to form the predetermined order, for example, by cyclic rotation.
    Type: Grant
    Filed: December 23, 1975
    Date of Patent: December 6, 1977
    Assignee: U.S. Philips Corporation
    Inventors: Jan Hendrik DE Jonge, Adrianus Josephus Smulders