Engraving apparatus

Claim 1

APPARATUS COMPRISING, (A) A PANTOGRAPH MECHANISM PIVOTALLY CARRIED BY A BASE AND ELECTRICALLY INSULATED THEREFROM, (B) A TRACING STYLUS CARRIED AT ONE END OF SAID MECHANISM AND AXIALLY MOVABLE IN A PLANE NORMAL TO THAT OF THE MECHANISM, (C) A ROTATABLE SCRIBER CARRIED AT THE OPPOSITE END OF SAID MECHANISM AND AXIALLY MOVABLE IN A PLANE NORMAL TO THAT OF THE MECHANISM, (D) A REFERENCE MARKING CARRIED BY THE BASE, (E) A LETTERING TEMPLATE SUPPORTED BY THE BASE AND MOVABLE RELATIVE TO THE SAID REFERENCE MARKING, SAID TEMPLATE COMPRISING A PLASTIC SHEET CARRIED BY A METAL PLATE, WITH THE CHARACTERS OF THE TEMPLATE FORMED BY CUTTING COMPLETELY THROUGH THE PLASTIC SHEET, (F) A FILM-SUPPORTING MEMBER CARRIED BY THE BASE, (G) MEANS FOR SECURING A PHOTOGRAPHIC FILM TO SAID FILM-SUPPORTING MEMBER, (H) OPERATING MEANS FOR MOVING THE STYLUS INTO TRACING REGISTRY WITH THE TEMPLATE, (I) COUPLING MEANS PIVOTALLY CARRIED BY THE SAID MECHANISM AND MECHANICALLY-COUPLED BETWEEN THE STYLUS AND THE SCRIBER, SAID COUPLING MEANS EFFECTING AXIAL MOVEMENT OF THE SCRIBER INTO ENGAGEMENT WITH THE PHOTOGRAPHIC FILM WHEN THE STYLUS IS BROUGHT INTO TRACING REGISTRY WITH THE TEMPLATE, (J) A MOTOR FOR ROTATING THE SCRIBER, AND (K) CIRCUIT ELEMENTS FOR COMPLETING AN ELECTRICAL CIRCUIT BETWEEN THE MOTOR AND A VOLTAGE SOURCE, SAID ELEMENTS INCLUDING THE SAID STYLUS AND THE METAL PLATE OF THE TEMPLATE.