An Impulse Electric Motor for Driving Recording Instruments (1923)
NASA Technical Reports Server (NTRS) · leaf 15
5 4 .6 Armature reciprocation … Armature springs Base Field coils Field poles Left electromagnet Right n Fig,2 Diagrammatic drawing cf direct current synchronous motor.
NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
