Patents Assigned to Robert J. Gillespie
  • Drafting machine
    Patent number: 4438569
    Abstract: A drafting machine includes a pair of perpendicular straight edges slidably mounted with respect to reference scales integrally mounted within the drafting machine. A fine adjustment mechanism includes a worm and spur gear combination for moving the straight edges with respect to the scales. An override mechanism allows the straight edges to move freely with respect to the scales. The drafting machine preferably includes a second adjustable scales adjacent each reference scales for ease and accuracy in measuring.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: March 27, 1984
    Assignee: Robert J. Gillespie
    Inventor: Walter Weglin