...and then we're back to zygote slavery programming, dazzlenation....regarding the boiler/pump/sweep motifs....go figure:

Chigley - Binnie and Bessie - YouTube

The cobweb syndrome: first trimester sonographic diagnosis of multiple amniotic bands confirmed by fetoscopy and pathological examination - PubMed (nih.gov)

or to be more specific...a 'beam' engine: