Patents by Inventor Tadahiro Kikuchi

Tadahiro Kikuchi 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: 5210721
    Abstract: An analog universal watch has an area dial 4 showing different areas of the world attached to an area dial spindle 10 and an area dial wheel 11 linked to a timepiece drive mechanism through a minute wheel 15. A pawl fastened to an hour wheel 17 engages with a ratchet wheel 12 fastened to the area dial spindle 10 so that an hour hand spindle 16 is driven indirectly. Provisions are made to permit correcting the area dial spindle 10 by means of a hand setting stem through the minute wheel 15, along with the independent correction of the hour wheel 17 by means of the hour hand correcting wheel 25 that engages with and releases the hand setting stem. Thus, the timepiece permits not only the ordinary correction of the pointers but also the setting of the hour hand alone to the local time of the desired area.
    Type: Grant
    Filed: February 3, 1992
    Date of Patent: May 11, 1993
    Assignee: Orient Watch Co., Ltd.
    Inventor: Tadahiro Kikuchi
  • Patent number: 4095406
    Abstract: Second adjustment system in an electronic watch employing a quartz oscillator as a time base. The watch comprises a standard oscillating circuit including the quartz oscillator, a divider, a driving circuit, and a converter. The divider produces several oscillatory output signals of different frequency so as to produce diverse time signals. A time signal selection switch selects output among these outputs. The selected output time signal corresponds to the signal required for adjusting a time delay or a time advance of the seconds indicated by the watch. An incorrect time is corrected during normal watch operation by this second adjustment system.
    Type: Grant
    Filed: August 29, 1975
    Date of Patent: June 20, 1978
    Assignee: Kabushiki Kaisha Daini Seikosha
    Inventors: Tadahiro Kikuchi, Yukio Ikehata, Masataka Ikenishi, Shozo Kushida
  • Patent number: 4078373
    Abstract: A watch movement comprises upper and lower spaced-apart plates between which are mounted the major components of the watch movement. Manufacturing indicia indicative of the manufacturer, date, serial number and other particulars of the watch movement are disposed on the top face of the lower plate, facing the upper plate, and corresponding openings are provided in the upper plate overlying the indicia so that the manufacturing indicia is readily visible through the openings. Magnifying lenses may be disposed over the openings to magnify the indicia visible therethrough.
    Type: Grant
    Filed: August 29, 1975
    Date of Patent: March 14, 1978
    Assignee: Kabushiki Kaisha Daini Seikosha
    Inventors: Masataka Ikenishi, Shozo Kushida, Tadahiro Kikuchi, Yukio Ikihata
  • Patent number: 4074093
    Abstract: A switching mechanism in an electronic watch including a clicking mechanism comprising a clicking cam which is mounted for rotation on an operative rod and a spring which is fixed to a base plate. The clicking cam is provided with a peripheral projecting portion. The spring is provided with a convex portion. In a switching operation, the projecting portion of the cam engages with the convex portion of the spring during the rotation of the cam which is rotated together with the operative rod. After passing through a dead point where the cam disengages with the spring, the cam continues to rotate due to the restoring force of the spring. Then, a click sound is produced at the engagement and the disengagement therebetween.
    Type: Grant
    Filed: September 19, 1975
    Date of Patent: February 14, 1978
    Assignee: Kabushiki Kaisha Daini Seikosha
    Inventors: Yukio Ikehata, Masataka Ikenishi, Shozo Kushida, Tadahiro Kikuchi