Talk:Torque amplifier

A fact from Torque amplifier appeared on Wikipedia's Main Page in the Did you know column on 1 January 2013 (check views). The text of the entry was as follows:

Did you know... that Vannevar Bush's use of the torque amplifier solved a problem with the ball-and-disk integrator that Lord Kelvin found when he first thought of the differential analyser over 40 years earlier?

A record of the entry may be seen at Wikipedia:Recent additions/2013/January. The nomination discussion and review may be seen at Template:Did you know nominations/torque amplifier.

Wikipedia

What cam?

Please justify this assertion:

 Both end with a cam (obscured in the attached sketch), which via a follower 
 and a rocking arm holds one end of each rope. If the input shaft rotates 
 from the null position, its cam raises or lowers the input follower, which 
 via the rocking input arm tensions the rope on one drum and slackens the other.

As far as I can determine there is no cam in that design nor any need for one. John G Hasler (talk) 13:56, 5 February 2021 (UTC)[reply]