Patents by Inventor Tadashi Nishijima

Tadashi Nishijima 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).

  • Numerical control system having a position processing unit operated upon a power failure
    Patent number: 4107654
    Abstract: A numerical control system includes a machine tool position processing unit operated upon a power failure. The machine tool position processing unit is adapted to normally generate a present position output for each sampling time in response to an output corresponding to the absolute position of the machine tool as detected at a resolver, adapted to store and hold the absolute position data when a power supply is interrupted, and adapted to generate, when a power supply is resumed, an output corresponding to a corrected present position of the machine tool as obtained by correcting an overtravel effected by the machine tool at the power interruption time.
    Type: Grant
    Filed: February 7, 1977
    Date of Patent: August 15, 1978
    Assignee: Tokyo Shibaura Electric Co., Ltd.
    Inventor: Tadashi Nishijima