Comment by ggm

I have a copy of Svoboda's work "3 bar linkage computers" from the MIT radiation labs series.

https://www.randomwraith.com/documents/Svoboda-ComputingMech... (different edition to mine)

Probably not identical. but the kid next door? Svoboda worked on nomograms too from google searches.

(I think the linkage computers were used in gunnery, and in ground-controlled-radar and like, before computing went digital)