Patents Assigned to Guertin Brothers, Inc.
  • Stone setting press
    Patent number: 4077284
    Abstract: A stone setting press for securely fastening stones to settings comprising an arbor supported on a frame or base, shaped to receive and support a ring setting. A forming die at the end of a shaft is shaped to deform the prongs of a setting about a stone. The shaft is supported on the frame for axial movement to and from a position in which the die shapes the prongs. A leverage system having variable mechanical advantage is used to actuate the shaft.
    Type: Grant
    Filed: October 29, 1975
    Date of Patent: March 7, 1978
    Assignee: Guertin Brothers, Inc.
    Inventor: Paul M. Twichell