Patents by Inventor Tatsuhiro Yasunaga

Tatsuhiro Yasunaga 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).

  • Nonrecorded section detection in a tape recorder apparatus
    Patent number: 4198664
    Abstract: A nonrecorded section detection switch is provided through which a power supply voltage is applied to an amplifier associated with a reproduction head at a desired time. A switching transistor is connected to receive the output signal of the amplifier and turns ON only when the amplifier develops the signal. A charge/discharge loop is formed through the base and the emitter of the switching transistor, and a level detector is provided to control a tape feed mechanism in accordance with a charge level of the charge/discharge loop.
    Type: Grant
    Filed: March 30, 1978
    Date of Patent: April 15, 1980
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Tatsuhiro Yasunaga, Masaru Fujii
  • Automatic program locator for tape decks
    Patent number: 4014039
    Abstract: The present disclosure relates to tape decks having a detection system responsive to a silence between recorded programs. A key board panel is provided for inputting a desired number to a down counter in order to position a head of a program after skipping a desired number of programs recorded on the tape at the fast movement speed. The count of the down counter is decremented once for every occurence of a detection signal from the detection system representative of the silence between recorded passages. The tape drive is stopped or returned to its normal playback speed when the contents of the down counter become zero.
    Type: Grant
    Filed: April 24, 1975
    Date of Patent: March 22, 1977
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Tatsuhiro Yasunaga
  • Automatic program head positioning and tape feed control for tape decks
    Patent number: 3984869
    Abstract: An automatic program advance switch is provided for advancing or skipping a recorded passage which is about to be played and going on to the next passage. The tape is driven at a fast speed and a reproduction signal from a playback head is muted with the use of a squelch circuit upon depession of the automatic program advance switch. The tape drive is returned to its normal operating speed when a silence between recorded passages on the tape is detected during the fast movement of the tape. The tape speed control is achieved by varying the revolution velocity of a motor for driving the tape.
    Type: Grant
    Filed: March 28, 1975
    Date of Patent: October 5, 1976
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masaru Fujii, Tatsuhiro Yasunaga, Yoshimasa Okada
  • Automatic program locator for tape decks
    Patent number: RE30416
    Abstract: The present disclosure relates to tape decks having a detection system responsive to a silence between recorded programs. A key board panel is provided for inputting a desired number to a down counter in order to position a head of a program after skipping a desired number of programs recorded on the tape at the fast movement speed. The count of the down counter is decremented once for every occurence of a detection signal from the detection system representative of the silence between recorded passages. The tape drive is stopped or returned to its normal playback speed when the contents of the down counter become zero.
    Type: Grant
    Filed: May 23, 1978
    Date of Patent: October 7, 1980
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Tatsuhiro Yasunaga