How do mechanical transmissions (organ) work?

I recently watched a video by Fraser Gartshore of him playing the "dual organ" in Gackenbach. There are two organs in the church: a French symphonic "Göckel" (organ builder) organ and an English Romantic organ. When I looked at the organ index entry, I noticed that the Göckel organ is fully mechanical, but still has transmissions and sub-/super-octave couplers. How does that work exactly? That would have to be a huge framework of abstractions. Thanks in advance!

https://www.youtube.com/watch?v=LD8YLNYq0Eo

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Arlecchino
1 year ago

Hello Cetarius,

oh woe, what a chatter… so little information in almost half an hour lecture…

First of all: The Göckel organ has a mechanical game and register tractor, that’s right. But it is also playable from the other organ, so it also has an electric game and register tractor. It is therefore very likely that the octave couplings were constructed as electrical couplings. Six (!) mechanical octave coups in a freestanding play table – that would be very expensive, and, without impairing the playability, hardly feasible.
(NB: It is exclusively octave couplings, transmissions are something else.)

But that wasn’t your question.
Mechanical octave couplings can be built in various ways:

Thus, for example, stechers can be placed on the rear ends of the keys, with respect to the deductions of the ‘normal’ tracture, which are guided over angles to the waves for the respective one octave higher (or lower) lying tones.

Or at the tone cannial cells, seductions to the tone cannial cells of the one octave higher (or lower) lying tones are applied. These can be opened and closed by a loop.

It is also possible to drill the loops on the grinder so that depending on the position only the original pitch sounds or only the octave or both pitches.

You see, there are many possibilities and apparently a male who pays for everything that falls to the organist and the organ maker.

LG

verreisterNutzer
4 months ago

Here the suspension is also explained directly:

https://www.die-orgelseite.de/functional.htm

That is essential

rubber ball

RStroh
1 year ago

It should be a huge skeleton of abstraction.

Correct. They’re behind the table.