In
link the case of Tourbillion No. 2 two extra springs lock the going train when the power of the mainspring has been fully spent but once the mainspring is wound the gear train moves and unlocks the mechanism releasing the balance spring. Surprisingly Klings didn't patent the mechanism. When the watch was sold directly from Klings in 2016 it came with the technical drawings he made for
link the mechanism
link drawings that also come with this lot from Phillips alongside box and papers of course.