User:MichaelFrey/US1721447

The boiler is either housing a transformer or a battery.

Figure 1 is a side view in elevation of an electrically driven engine,
Figure 2 is a transverse vertical section of said engine
Figure 3 is a plan view of the engine structed according to the principles of the invention,
Figure 4 shows more or less diagrammatically a circuit which includes a solenoid.

Parts:
11. housing in the shape of a boiler (hollow)
12. smoke stack
13. steam dome
14. fire box
15. battery
16. battery contact
17. battery contact
18. wires
19. wires
20. switch box
21. wire
22. perforation
23. switch element // fixed swicht member
24. switch
25. coil
26. ground connection of the coil
30. brass tube or cylinder
31. casing/housing
32. flanges
33. (end) walls
34. core // pistion
35. pitman // connecting rod
36. relativly fixed vore
37. boss
38. spring coil
39. finger piece
40. crank shaft
41. bearing
43. crank
45. pair of flywheels
50. pair of guide rods
51. cross head/bracket
55. casing/steam cheast
56. rod
57. eccentric ring
58. eccentric
60. contact of switch 24
61. contact
62. movable switch element
64. spring member/arm
65. cam
71. link
75. door
77. latch
78. keeper
79. handle
80. u-shaped member
81. base member
82. second/auxiliary base member