Abstract: An engraving machine for rings and bangle bracelets is disclosed. The machine is of the type that utilizes a circular pattern carrier rotatably carried on the base of the machine. The patterns, which are carried on the periphery of the carrier, are transferred to the inner surface of a ring or bangle bracelet by way of a pantograph lever having a stylus adjacent the pattern carrier and an engraving tool adjacent the inner surface of the ring or bangle bracelet. A workholder assembly is utilized to position the ring or bangle bracelet during the engraving process. The entire workholder assembly is vertically slideable along two horizontally disposed rods, which are secured to a carrier frame. A peripheral indexable ratchet wheel is rotatably mounted to the workholder assembly and carries on it a plurality of clamping chucks which hold the rings or bangle bracelets in position. The clamping chucks are axially slideable within slots in the ratchet wheel and have interchangeable jigs removably secured to them.

Abstract: An engraving machine is disclosed for engraving articles in a manner which automatically causes relative rotation between an engraving tool and the article support means as a function of the width of a digit (letter of alphabet or numeral) to be engraved so that digits may be engraved on the article with uniform space between digits regardless of the width of the digit.