User:MichaelFrey/US2236984

Figure 1:
1. induction motor
2. stator winding
3. induced or rotor winding
4. circuit
5. variable voltage alternating current circuit
6. - 9. electric valves
12. control member
13. autotransformer
14. winding (of autotransformer 13.)
15. winding (of autotransformer 13.)
16. contact
17. contact
18. Controllable or adjustable contact-making mechanisms
19. Controllable or adjustable contact-making mechanisms
20. excitation system
22. batteries
23. batteries
24. current limiting resistances
25. rotary phase shifting device

Figure 2:
26. induction motor
27. inducing or stator winding
28. a quarter phase rotor winding
29. - 36. Electric valves
37. anode
38. cathode
39. controll member

Figure 3:
40. induction motor
41. three-phase inducing or stator winding
42. three-phase induced or rotor winding
44. circuit
45-62. Electric valve
63. anode
64. cathode
69. field or excitation winding