Improvements in Pneumatic Engines for Automatic Musical Instruments, or Mechanical Players therefor, more especially intended for Unwinding and Rewinding the Perforated Strips, or Sheets, in Mechanical Players for Pianofortes and Analogous Musical Instruments.

摘要

1552. Towner, A. D. Jan. 22. Reversing-gearing.-In mechanism for winding and rewinding the tune-sheets of automatic musical instruments, the transmission shaft is not moved in a longitudinal direction when changing from the winding to the rewinding position or vice versa, and the chain-wheels are in alinement under all conditions. When the pneumatic 23 is exhausted by operating the rewinding stop, it actuates the lever 17 through the links 21, 22 thereby sliding a spurwheel 7 along a key on the transmission shaft 6 and moving it out of mesh with a wheel 8. A lever 16 is actuated simultaneously by similar means to cause a clutch member 15 to slide along a key on the shaft 6 and engage a clutch member attached to a wheel 10, which is loose on the shaft 6, so that the roller 2 is driven by a chain 9 and wheels 10, 11 to rewind the tune-sheet. A spring 28 is provided to return the parts to their original position, and an arm 13 fitting into a groove on the boss of the wheel 10, prevents this wheel from moving in a longitudinal direction. A bellcrank lever 25 is actuated by the link 24 to remove a brake 26 from a wheel 27, which rotates with the roller 2.