FIELD: drawing equipment. SUBSTANCE: drawing head has arm, movable cover positioned on arm and rollers positioned within cover. Rollers shift edges of flexible disk to conical base within arm. Flexible disk is fixed with its lower part on pin. Ruler holder is attached on pin. Rulers may be pivoted for an angle of plus or minus 15 deg by rolling movable cover without slipping of flexible disk over conical base in arm. EFFECT: increased efficiency by improved precision and simplified construction. 1 dwg
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