Eliminating axial backlash in revolution joint 2

Centrifugal force causes red balls to exert force on yellow grooved washer-plates when shaft rotates, pulling it against bearing face of the blue bearing and the grey nut.
The video shows how the balls move under the influence of centrifugal force to push the plates apart and how the movement of the yellow plates helps to eliminate the shaft’s axial backlash.
This video was made based on picture 1, page 1-49 of the book:
Illustrated Sourcebook of Mechanical Components

[TheGlitchyCorgi]

With backlash mostly being a concern with stop-start cycles of direction changes, I'm not sure how this actually helps since it is dependent on the system being at speed to engage the mechanism.
This looks more like a (strange) centrifugal clutch to me.
What's a practical example/use of this as an anti-backlash coupling?

[wanglydiaplt]

Curious! This triggered an old memory of a device I helped build ages ago to cut a multiple-start thread using the X axis of a milling machine and a rotary indexer. We used balls and detents to locate the start points and then the assembly was attached to the X axis leadscrew with a timing belt and reduction drive so that each full turn of the leadscrew drove a rotating blank at some fraction of a revolution so that a form tool could mill the correct thread pitch. The ball-and-detent mechanism meant nothing slipped; it worked great every time.