Patents by Inventor Ferenc Biro

Ferenc Biro 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).

  • Equipment for the electronic speed control of an induction type motor, especially for use with data store motors
    Patent number: 4238720
    Abstract: Equipment for the electronic speed control of an induction-type motor such as the drive motor for a tape recorder, comprises a tachogenerator fixed to the shaft of the motor and operating a pulse generator that has two outputs. A saw-tooth generator has two inputs and one output, one of the inputs of the saw-tooth generator being a start input and the other being a control input. The start input is coupled to the pulse generator, as is also the control input. The latter output of the pulse generator is connected to the control input of the saw-tooth generator and also to the control input of at least one sampling stage. The output of the saw-tooth generator is connected to a dc amplifier, which is in turn connected to the signal input of the sampling stage. The output of the sampling stage is connected to a grounded capacitor and also the the control input of the driver stage.
    Type: Grant
    Filed: April 27, 1978
    Date of Patent: December 9, 1980
    Assignee: Mechanikai Laboratorium Hiradastechnikai Kiserleti Vallalat
    Inventors: Gyorgy Rothman, Ferenc Biro, Gyorgy Babos, Karoly Antolik, Otto Roffa