Techical informations for all phonographs

[Papycoup]

Hi all,

I am trying to get answers for my building project. I search every where, and I found some data in this forum !

So, can anyone confirm the following elements ?

Cylinders 2 minutes: 160 rpm, engraving 100 rpi lead screw turning counter clockwise viewed pinion side (1 intermediate pinion)
Cylinders 4 minutes: 160 rpm engraving 200rpi lead screw turning counter clockwise viewed pinion side (1 intermediate pinion)
Cylinders Ediphone: 80 rpm engraving 150 rpi lead screw turning clockwise viewed pinion side (no intermediate pinion)
Cylinders Dictaphone: 80 rpm engraving 160 rpi lead screw turning clockwise viewed pinion side (two intermediate pinions)

I saveed back the lead screw from from a Dictaphone, which is long enough to drive the reading head all over a concert cylinder,
and i am planing to build pinions to adjust the speed from mandrel to lead screw.

I d like to be sure about these values.

Thanks for an answer