Children's book with sound device (Machine-translation by Google Translate, not legally binding)

摘要

A children's book with sound device, characterized in that the format of the booklet, has attached as an extension to its last sheet, a closed container that houses a musical device, consisting of a metal barbed vibrator attached to an upright that is made integral with the bottom of the container and against whose barbed comb, the protruding protruding pins of an endless belt, which move with one of its torsional edges disposed tangentially to said barbed vibrator, trip during its passage. (Machine-translation by Google Translate, not legally binding)