German term meaning "forest flute," used by Welte for an open wood flute pipe, very imitative of the orchestral instrument. An important voice in many Welte orchestrions often characterized by a wedge-shaped cap forming the lower lip of the mouth, and a round hole forming the upper lip.

Small box with a coin slot, connected to an electric piano, orchestrion or jukebox by wires. When a coin is deposited, an electrical contact is made which causes the instrument to play. An effective way of providing many coin slots throughout a business establishment, thus increasing the receipts of a single instrument. European coin pianos and orchestrions were rarely equipped with built-in coin slots but almost always contained electrically-actuated start mechanisms; a single wallbox was often attached to the outside of the case of such an instrument, or on a nearby wall.

plural: Walzen. German term for barrel.

Water-driven motor, connected to a water main, used mainly 1870-1905 to power automatic instruments in a time when electricity was not available in many areas.

Power system used to operate organ clocks, early barrel orchestrions, and other instruments. A heavy weight (several hundred pounds or more in large instruments) is wound up to near the top of the instrument. As it falls, it powers the instrument through an escapement.