Apparatus to enable a composition played by a pianoplayer roll, to pass in ordinary musical characters horizontally before the operator

摘要

210,279. Malkin, E. Jan. 23, 1923. Drawings to Specification. Facilitating observation of tune-sheet markings; tune-sheets. - Mirrors are adjustably arranged to make the music, which is printed in ordinary rotation along the vertically-moving tune-sheet, pass horizontally from right to left before the eye. Specification 7122/99 is referred to.