Geometrical instruments – Scriber – Pantographic
Patent
1977-06-06
1979-04-03
Stearns, Richard R.
Geometrical instruments
Scriber
Pantographic
90 62R, B23C 116
Patent
active
041469666
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.
REFERENCES:
patent: 2293134 (1942-08-01), Hallenbeck
patent: 2562269 (1951-07-01), Gruettner et al.
patent: 2749617 (1956-06-01), Gruettner
patent: 3273249 (1966-09-01), Klaassen
patent: 3586273 (1971-06-01), Sloyan
patent: 3718072 (1973-02-01), Berlant
Bonheim Hans
Levine Jack W.
New Hermes Incorporated
Stearns Richard R.
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