Melodie Violin range pipework, seven ranks (front to rear): (1) Wooden Harmonic Piccolo, (2) metal Clarinet, (3) metal Violin (commonly Gamba), (4) stopped metal Flute (commonly Quintadena), (5) wooden Violin, (6) wooden open Flute, and (7) wooden Violoncello. The control ventils (valves) for each pipe rank are located in the box-like enclosure at the right of the pipe chest. Notice that for a compass range a little more than the top octave there are two sequential pipe notes, situated back-to-back, for each valve block.
Bass pipework, four ranks (left to right): According to Wurlitzer the ranks are (1) Saxophone (metal reed--commonly Fagott or Bassoon), (2) French Horn (wooden stopped flute--commonly Gedeckt), (3) metal (and wood at bass end) Violin (commonly Gamba bass--this rank is a continuation of the Melodie Violin Gamba pipes) and (4) a large wooden Violoncello rank at the rear.
Front side view of trapwork, consisting of (left to right) tambourine, triangle, snare drum, castanets, and bass drum (partially visible behind the snare drum) with cymbal and kettle drum effect. The trapwork control valves are an integral part of the register control unit, which is located directly below and in front of the trapwork.
View of the new main stack viewed from the rear, showing the individual motor pneumatics and lifting rods that push up against the piano action whippens, causing the piano notes to sound.
A frontal view showing the complicated interior of the big Concert PianOrchestra. At the top is the roll changer mechanism, behind it the maze of lead tubing that connects the pipe chests to the main stack is partially visible. At horizontal center is the electric motor flat belt drive and crank system that powers the vacuum and pressure feeders (pumps) at chassis bottom. At the far right is a pulley countershaft used to obtain a speed reduction for the pump crankshaft. The small round leather drive belt going to the roll changer is powered off of the end of the speed reducing countershaft, and then feeds around an adjustable belt tightener.
