In the early 20th century, Hans Schnellar, the timpanist of the Vienna Philharmonic, developed a tuning mechanism in which the bowl is moved via a handle that connects to the base and the head remains stationary. These instruments are referred to as Viennese timpani (Wiener Pauken) or Schnellar timpani.Vibration patterns and sound analysis of the Viennese Timpani. Bertsch, Matthias. (2001), Proceedings of ISMA 2001 Adams Musical Instruments developed a pedal-operated version of this tuning mechanism in the early 21st century.
