A single bell keyed and struck to sound like four
An organ-style keyboard driving hammers on a fixed bell to change its voices
The note describes a musical device in which one fixed bell is made to seem like four bells: an organ-type keyboard governs hammers that strike it, and struck by two hammers it changes its voices in the manner of an organ. The upper-right drawing shows a bell fitted with a row of keys and multiple strikers, with a small perforated cylindrical striker below. Faint pencil quarter-arc and triangle sketches elsewhere on the sheet belong to the untranscribed geometry series and are not covered by the text.
On this page
Organ keyboard and hammers making one bell sound as four
One and the same bell is to seem like four bells. Organ keys act on the held bell, and struck by two hammers it produces a change of voices in the likeness of an organ. The drawing pairs a keyboard with a bell and several strikers.