Improvements relating to Apparatus for Recording Musical Compositions.

摘要

8366. Lake, H. H., [Preda, E.]. April 10. Music recorders.-Relates to apparatus for recording music played upon keyboard instruments. The inner ends of the keys are connected by rods, such as 19, 20, 21, to levers 13, 14, 15, which are pivoted on rods 11, 12, and carry styles 16, 17, 18. When the keys are depressed, the styles cause a piece of carbon paper to make a mark on a travelling paper band, which passes over a roller 9. The roller 9 is driven from another roller 4, which is driven at a constant speed by a motor 6. The record is transcribed into the ordinary notation by a device shown in plan in Fig. 3. A roller 24 carries the record 1, which is drawn under the edge of a scale 30 forming part of a desk 34. The scale 30 represents a keyboard in miniature, and thus indicates the positions of the notes corresponding to the marks on the record. The lengths of the notes correspond to the lengths of the marks, and are ascertained by another scale 31 which can be moved along the former one. A feature of the invention is that the record sheet is driven at a constant speed under all circumstances, the proportion between the lengths of the marks on the record, and those on the scale 31 being ascertained by trial preliminary to transcription.