Patents by Inventor Karel NAVRATIL

Karel NAVRATIL 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: 11474338
    Abstract: A focusing mechanism for a binocular with dual stiffness of operation, comprises a focusing knob which is mounted rotatably about its longitudinal axis on a static shaft which is fixedly mounted in the binocular structure. The focusing knob is associated with a braking means with adjustable braking effect and is provided with a braking drum. The cylindrical circumferential surface of the braking drum is associated rotatably about its longitudinal axis with the cylindrical circumferential surface of a braking ring, whose other cylindrical circumferential surface is associated by its circumferential surface with a collet of a clamping ring, which is with its rigid part seated in the housing which is fixedly mounted on the static shaft. The collet of the clamping ring is associated with the control of the pressure force on the cylindrical circumferential surface of the braking ring, the control of the gripping of the collet being coupled to a switch of stiffness of the focusing operation.
    Type: Grant
    Filed: August 13, 2019
    Date of Patent: October 18, 2022
    Inventors: Karel Navratil, Milos Slany
  • Patent number: 11372193
    Abstract: An improved focusing mechanism that integrates magnetic measurement of a position sensor magnet on a focus adjustor wherein the focus position is based on capturing a focus mechanism's position with use of the position sensor magnet and 3D magnetometer and storing that captured position in memory thus allowing users to setup and save a focus mechanism's position facilitating the quick re-focusing on previously saved positions is disclosed.
    Type: Grant
    Filed: April 22, 2020
    Date of Patent: June 28, 2022
    Assignee: Meopta U.S.A., Inc.
    Inventors: Libor Dockal, Karel Navratil, Radek Libicher, Vladimir Skricil
  • Publication number: 20200341231
    Abstract: An improved focusing mechanism that integrates magnetic measurement of a position sensor magnet on a focus adjustor wherein the focus position is based on capturing a focus mechanism's position with use of the position sensor magnet and 3D magnetometer and storing that captured position in memory thus allowing users to setup and save a focus mechanism's position facilitating the quick re-focusing on previously saved positions is disclosed.
    Type: Application
    Filed: April 22, 2020
    Publication date: October 29, 2020
    Inventors: Libor Dockal, Karel Navratil, Radek Libicher, Vladimir Skricil
  • Publication number: 20200057295
    Abstract: A focusing mechanism for a binocular with dual stiffness of operation, comprises a focusing knob which is mounted rotatably about its longitudinal axis on a static shaft which is fixedly mounted in the binocular structure. The focusing knob is associated with a braking means with adjustable braking effect and is provided with a braking drum. The cylindrical circumferential surface of the braking drum is associated rotatably about its longitudinal axis with the cylindrical circumferential surface of a braking ring, whose other cylindrical circumferential surface is associated by its circumferential surface with a collet of a clamping ring, which is with its rigid part seated in the housing which is fixedly mounted on the static shaft. The collet of the clamping ring is associated with the control of the pressure force on the cylindrical circumferential surface of the braking ring, the control of the gripping of the collet being coupled to a switch of stiffness of the focusing operation.
    Type: Application
    Filed: August 13, 2019
    Publication date: February 20, 2020
    Inventors: Karel NAVRATIL, Milos SLANY