Patents by Inventor Moriaki Toyoda

Moriaki Toyoda 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).

  • Drive control circuit for d.c. motor
    Patent number: 4080555
    Abstract: The rotation of a motor is controlled to maintain a standard frequency from a standard frequency generator in synchronism with the frequency of a tachogenerator which is associated with the d.c. motor. In order to prevent the motor rotation from being stabilized at a number of revolutions other than a predetermined number of revolutions, there are provided an acceleration circuit and a stop circuit for forcedly controlling the motor rotation at the predetermined number of revolutions.
    Type: Grant
    Filed: April 19, 1976
    Date of Patent: March 21, 1978
    Assignee: Denki Onkyo Co., Ltd.
    Inventors: Takehiko Kawada, Moriaki Toyoda