Iron Ore Concentration No. 1. [Volume: 8, Issue: 1, 1888, pp. 3-13]

6

UNITED STATES ASSOCIATION OF

[VOL. 8,

'4-inch holes, but going out the end of screen, goes back to the
60 by 2 multiple crushers. Product of 15 by - fine crushers is
elevated and screened; material not passing -tholes returning
to them. Each group of crushers has three Conkling jigs."
As the plant consists of two such groups described by Mr.
Blake, the total equipment may be summarized as:
Three 100 H. P. boilers, One 250 steam engine.
Two 20" x 15" crushers, Four 30" x 5" crushers.
Six 60" x 2" multiple jaw crushers (3 jaws).
Four 15" x i" multiple jaw crushers (7 jaws).
Revolving screens and elevators.
Six Conkling jigs.
The following description of the jig used and the illustrations
of it, plates 3 and 4, are taken from Mr. Ruttinan's paper.
"The machine, as shown in the accompanying drawings, may
be divided into four essential parts, viz: the frame; the tub;
the jig; the elevators. For the better understanding of the
drawings, the following index of the names of the parts is appended, the numbers referring to corresponding numbers in plates
3 and 4.
INDEX.

1. Bevel-wheel.
2. Pinion.
3. Upright shaft.
4. Shoe.
5. Link.
6. Upper collar.
7. Trunnion-piece.
8. Lower collar.
9. Outside nut.
10. Flange.
11. Inside nut.
12. Standard.
14. Hoop.
16. Screen-plates.
18. Spider.
19. Key.
20. Cone.
21. Water-sleeve.
22. Water-box.
23. Lower elevator-box.
24. Lower elevator-shaft.

25. Band-arms.
26. Cam-wheel.
27. 36-inch pulley.
28. Pinon-shaft.
29. Cone pulleys.
30. Lever-beam.
31. Yokes.
32. Lever-shaft.
33. Driving-shaft.
34. Top elevator-shaft.
35. 24-inch pulleys.
36. Flange-pulleys.
37. Cone-pulleys.
38. Spring-pole.
39. Strap.
40. Bumper.
41. 3-inch water-pipe.
42. Regulating-valve.
43. Outlet-pipe to tail-race
44. Tub.
45. Splash-rim.

The Frame.-The frame is made of squared spruce or hemlock