Patents Assigned to Friedrich Frech
  • Beam compass
    Patent number: 4051599
    Abstract: A beam compass consisting of a triangular scale and two trammel heads, each including a hollow slide body having an outer face and three, approximately equiangularly offset inner faces bounding a passage through the slide body. Guide rails project from the inner faces into respective grooves of the scale. An arm projects from the outer face of each slide body at right angles to the scale, and its free end carries an attaching device for a compass point or writing implement.
    Type: Grant
    Filed: April 8, 1976
    Date of Patent: October 4, 1977
    Assignee: Friedrich Frech
    Inventor: Andrej Sinkovec