HELICAL SPRINGS,
390
No. 10311—Continued.
Height.	Load sustained.	Remarks.
Inches.	Pounds.	
14.57	300	
13.09	400	
11.51	500	
9. 97	600	
8.84	700	
7.78	800	
8.80	700	
9.70	600	
11.19	500	
12.71	400	
14.50	300	
16.08	200	
17.78	100	
Spring in a yoke fixture having 4 side rods, the inside elements of which were on a circle		
31" diameter.		
17.66	100	Initial load.
16.12	200	Continuous jarring as loads were changed.
14.50	300	
12.93	400	
11.38	500	
9.64	600	
8.29	700	
7.82	750	
7.73	800	
7.77	750	
8.02	700	
8.93	600	
10.56	500	
12.08	400	
13.70	300	
15.30	200	
17.03	100	
	0	
17. 32	100	
7.74	800	
17.02	100	
	0	
17.32	100	
	0	Rested without load 1 hour.
17.74	100	Height under 100 pounds after resting.
No. 10312.
.....inches.. 3.14
.......do........37
.......do.... 19.58
.......do.......60
5 pounds 6| ounces.
DESCRIPTION OF SPRING.
Exterior diameter of coil...............................
Diameter of bar.........................................
Height unloaded.........................................
Distance between coils.....................................
Weight..................................................
Height.	Load sustained.	Remarks.
Inches.	Pounds.	
17.95	100	Initial load. Spring jarred continually with mallets as the loads were changed.
16.39	200	
14.89	300	
13.48	400	
11.89	500	Central rod diameter within the spring.
10.32	600	
8.61	700	
7.80	800	Spring generally closed down.
8.50	700	
10.20	600	
11.51	500	
13.08	400	
14.73	300	
16.27	200	
17.98	100