Schantz Cross-Top Pitman, Blackinton-Style Slider, and Ventil Chests

A pitman chest switches every stop separately at every note, and the pitman is the part that does the switching. Inside the chest, the key channels are enclosed conduits built into the chest walls, each serving all the pipes that belong to one key. The stop channels run perpendicular to them, one channel for each stop, and each stop channel holds one pitman for every note that can sound a pipe on that chest. The pouches and pallets sit above the toe holes in the topboard, and because the chest is divided internally into stop channels, it is built to a fixed number of stops.

The pitman itself is a small metal cylinder with a leather pad attached, and its job is stop selection: it decides whether the wind admitted for a given key reaches a given rank. In James H. Cook’s 1998 description, hosted by the Organ Historical Society, a pipe sounds only when the selected stop raises the corresponding pitman and the played key exhausts the key channel, letting the pouch collapse and the topboard valve open. R. E. Coleberd, writing in The Diapason in 2003, put the same logic as an x, y switch: both the stop and the key must be on before a pipe speaks. That two-condition gate, repeated once for every note of every stop, is what marks the family.

The cross-top phrase describes how Schantz builds the toeboards, not a different mechanism. The firm’s 2023 anniversary feature in The Diapason, written by three of its own staff, states that Schantz developed a cross-top pitman chest built of laminated yellow poplar toeboards running perpendicular to the ranks of pipes, and describes that construction as allowing the chest to accommodate climate variation. Both the construction and the claimed benefit are the company’s own account of its own work.

Everything under those toeboards is still the pitman family described above: key channels and stop channels at right angles, one pitman per note in each stop channel, and the same two-condition gate. The Organ Historical Society’s educational page on pitman windchests, as it stood in early September 2026, credits the Schantz Organ Company with the simplified cross-section diagram it uses and illustrates the type with a photograph of a pitman chest in a Schantz organ at First United Methodist Church, Birmingham. That is illustration, not exclusivity: the diagram explains the general type, and the photograph shows one example of it.

A ventil chest controls the wind at the stop rather than at the note. Independent of any one manufacturer, ventil stop action is defined by each rank being mounted over its own discrete stop channel, so that when the stop is off the organ’s wind pressure is not present in that channel at all; the stop is winded only when it is drawn. Goulding & Wood, in a 1991 Diapason article, drew the same line in its own words: ventil chests are divided into stop channels, in which the stop action controls the flow of wind to a stop, whereas slider chests are divided into note channels, in which the key action controls admission of wind to a pipe.

The contrast with the pitman chest is the whole point of the distinction. John Bishop, writing in The Diapason, describes turning on a stop in a pitman chest as admitting pressure into a channel running through the pitman rail, which moves a row of pitman valves so that each note is switched on individually and at once rather than waiting on a shared stop channel to fill. The two are different stop-admission architectures with different consequences, not two names for one design.

Schantz used the ventil family in its tubular-pneumatic work. The firm’s anniversary feature states that tubular-pneumatic action was standard by 1906, using ventil chests with an individual compartment for each stop.

Cancelling a stop while a chord is held can produce a tone sag on a ventil chest. Because the wind for that rank lives in a shared stop channel, turning the stop off lets the pressure leave the channel while the notes are still held, and the sound sags away rather than stopping cleanly, which makes the action sound comparatively slow. John Bishop presents this as a general characteristic of ventil stop action rather than something tied to a particular instrument or builder. A pitman chest switches each note of the stop on its own, so the same organist’s habit gives a different result on the two families.

The label refers to a design that Lyle Blackinton published in the technical literature of the American Institute of Organbuilders, not to a chest he designed for Schantz. His article, Electro-pneumatic Action and the Slider Chest, describes the chest without naming it after himself and does not mention Schantz. The Blackinton-style label is the firm’s own usage: its 2023 anniversary feature in The Diapason uses the phrase for the electro-pneumatic slider chests it adopted, and states that Schantz’s first instrument using electro-pneumatic key action with slider chests was built in 1993 for a United Methodist church in Painesville, Ohio.

That 1993 anchor has partial independent support. The Schantz-authored chronology published in The American Organist in September 2023 describes the 1993 chest as the firm’s first new chest-action development in a generation, which is the company’s own characterization. The record for Schantz Opus 2038 at Painesville United Methodist Church in the Organ Historical Society’s Pipe Organ Database, as it stood in early September 2026, carries an outside contributor’s note that the organ was dedicated in September 1993; the description of the Great division’s slider chest, and of the electro-pneumatic pitman chests elsewhere in the same instrument, comes from a Schantz employee’s separate note, and that note spells the style Blackington. An outside note corroborates the instrument and its date, but the chest-type description remains the builder’s own.

A slider chest gives every stop on a note one pallet and one channel, and the electro-pneumatic version keeps that arrangement while opening the pallet pneumatically instead of by a tracker. In a pallet-and-slider chest the pallet is the key-controlled element and the slider is the stop-selection element, as James H. Cook’s 1998 tutorial describes it. All the pipes standing over one note share a single pallet and a common key channel, so every stop drawn on that note speaks together and with the same attack, which is the tonal advantage Goulding & Wood claims for its own slider construction. Only one electric action is needed per key or pallet regardless of how many pipes it controls, as Colin Pykett’s 2014 article on keying systems puts it, whereas on a unit chest each pipe has its own action.

The Blackinton-style electro-pneumatic slider chest is that pallet-and-slider architecture with electro-pneumatic key action driving the pallets; it is not a third stop-switching principle, and the Schantz chest of 1993 belongs to the slider family, not the pitman family.

The difference from a pitman chest shows up in the count of moving parts. Patrick J. Murphy & Associates, on its own website, states that a Blackinton-style electro-pneumatic slider chest needs only 61 primary pneumatics and 61 note pallet pneumatics per chest, against the hundreds or even thousands of pneumatics in a standard electro-pneumatic pitman chest, and that this is why the two differ so sharply in releathering labor; the counts describe a 61-note manual chest and would differ for pedal or extended chests.

The same firm states that in this chest the pallets can be swapped out in a matter of hours, which it contrasts with chests whose valves are buried under pipework and toeboards. Those are one practitioner’s observations about one chest pattern, not a rule for every slider chest, but they follow from the architecture: a slider chest switches a stop with one slider across the rank, while a pitman chest switches it with a pitman at every note.

Unit chests, and the unified instruments built on them, are covered at Schantz Unit Organs.