US PATENT SUBCLASS 84 / 486
.~ Leaf turners

Current as of: June, 1999
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84 /   HD   MUSIC

453  DF  ACCESSORIES {6}
486.~ Leaf turners {8}
487  DF  .~.~> Motor operated
488  DF  .~.~> Gravity operated
489  DF  .~.~> Hand and spring operated arms
*  DD  .~.~> Spring-operated arms {2}
500  DF  .~.~> Single spring arm {1}
502  DF  .~.~> Player-operated arms {2}
516  DF  .~.~> Single arm
517  DF  .~.~> Single transfer bar {3}

DEFINITION

Classification: 84/486

Patents showing constructions not clearly belonging in one of the following subclasses or showing features applicable to various types of leaf-turners.

(1) Note. Leaf-turners are devices to be attached to a music-stand or to the music-desk of a piano to enable a player to turn one or more leaves of music from right to left. In some cases the player releases a source of power, in others he furnishes the power. In either case he may use his hand, knee, or foot, and the terms "releaser" and "finger-piece" are used generically herein to include also knee-levers and foot-levers. Often a pedal is connected to operate a finger-key. Usually each leaf is attached by clips to one or two arms extending from a solid or tubular shaft pivoted near the line of fold of the music-sheets or the line of the back of a bound book, said arms extending along the top or bottom edge of the leaf or along both. This classification is based, first, on the immediate source of the power that turns the leaf-motor, gravity, spring, or hand--and, second, on whether there is a plurality of parts or a single one of each kind. The parts considered are only those of turning a leaf from right to left. In many instances there are keys or pedals to return the leaves from left to right. These are disregarded in the classification.

(2) Note. Patents for some features of construction that are not suggested by these titles are cross-referenced into this subclass.

SEE OR SEARCH CLASS

40, Card, Picture, or Sign Exhibiting,

524+, 529+ for means to feed a continuous sheet of music and 530+ for means to turn the leaves of a book.

248, Supports,

441.1+, for an easel, book or music score holder.