A double cymbal; two cymbals spaced apart with the faces parallel. Used in certain instruments of the 1920s and later, including the Hupfeld Sinfonie Jazz and many dance organs. * Synonyms: double cymbal, pedal cymbal, Charleston cymbal. * Dutch: hi-hat, dubbel bekken. * German: doppel Becken.

 1. The bar which holds the disc against the star wheels in a disc musical box. The bar holds the roller or idler wheels which apply direct pressure to the disc. Synonyms: pressure bar, idler arm. 2. In a piano, it holds the strings in position between the tuning pins and the agraffes on the upper plate bridge.

Found in early cylinder box combs to allow for rapid plucking of the teeth. They improved the action of the dampers by allowing the damper to curl in and under the tooth.

1. A lute-like instrument with small keys, in which the strings are actuated by contact with a rotating rosin-coated wheel. Two open strings play all the time in the same manner as the drone of a bagpipe. * French: vielle * Medieval Latin: organistrum. 2. Popular usage: barrel-operated street piano or organ. This incorrect usage probably originated from the hurdy-gurdy, street piano and organ all being instruments used by street musicians and played by turning a crank.