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Description
English: Electric motor control system

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
Date
Source https://www.google.co.in/patents/US2236984
Author Alexanderson Ernst F W
Permission
(Reusing this file)
Public domain The text and illustrations of US patents published before March 1, 1989 are in the public domain unless the patent text contains a specific notice that portions are copyrighted. See 37 CFR 1.71(d), 37 CFR 1.84(s)

The original patent contains no such notice, so its contents are in the public domain. Note: This only applies to images published before March 1, 1989. Patents published after that date are most likely copyrighted, unless in the public domain for another reason, such as {{PD-ineligible}}.

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inception

19 October 1937

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Date/TimeThumbnailDimensionsUserComment
current12:14, 9 August 2015Thumbnail for version as of 12:14, 9 August 20151,749 × 1,052 (30 KB)MichaelFrey{{Information |Description ={{en|1=Toy engine - Reciprocating electric motor that simulates a steam engine. {{:User:MichaelFrey/US2236984}}}} {{en|1=Electric motor control system}} |Source =https://www.google.co.in/patents/US2236984 |Author...

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