A cylinder musical box in which the cylinder rotates in a normal fashion and is laterally shifted at one position during its rotation. To enable longer-than-normal pieces of music to be played, arrangements are made for the musical pinning to be continued during the time when the cylinder is making its lateral shift in what is known as the "dead space." There is also a secondary mechanism which prevents the mechanism from stopping in the normal way after one cylinder revolution.
MBSI
Musical Box Society International