Goulburn, R.C. Cathedral, organ by Hill & Son, 1890
All action in this organ is completely original
Key action
Fig. 5 shows a diagrammatic sketch of the key action. Since each department has its own particular type of key action, each will be dealt with separately.
Great
Operated by a Barker lever action. The Swell to Great and Swell to Great Octave couplers are also operated through Barker lever, thus adding no extra weight to the touch. Plate 36 shows the Barker motors from the back. Backfalls direct from the Great manual are connected via trackers to squares which open the air inlet valves of the Barker motors. In Plate 37, which is a view of the action from the console with the music desk assembly removed, the front ends of two rows of the Barker motors are visible at the top. Each of these is then connected to a wooden tracker, the other end of which operates a backfall (also visible in Plate 51). The rear ends of these backfalls then operate the pallets of the Great chest via a tracker.
Swell
This action operates via a set of squares operated from the back ends of the keys (visible in Plate 37), which then functions as a normal tracker action (refer to Fig. 5).
Choir
This department is operated by a set of transverse rollers. Plate 38.
Pedal
Also operated by transverse rollers (Plate 39) , the movement of which is then transmitted to a set of squares via trackers, (Plate 40) exactly as with the Choir action.
Couplers
Swell to Great. Operated via Barker lever. Refer to Fig. 5.
Swell to Great octave. Also operated via Barker lever. The backfalls for this coupler are situated above those of the Swell to Great coupler (Fig. 5) and displace the movement one octave higher.
Swell to Choir. This coupler is mechanical and its backfalls can be seen above the sqares for the Swell action in Plate 37.
Swell to Pedal, Great to Pedal and Choir to Pedal couplers operate mechanically, and the associated backfalls are shown in Plate 41.
Materials of key action
Squares are of copper.
Rollers are of iron (painted black).
Backfalls, trackers etc., of wood (and beautifully finished)
Shapes of backfalls. Figs. 6 and 7
Stop action
Usual trundle÷type action, with trundles of iron (painted black). Plate 42.
Combination action
Movement of trace rods occurs through oppositely situated fans.