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Studies in soil cultivation: IV. A new form of traction dynamometer

Published online by Cambridge University Press:  27 March 2009

W. B. Haines  and
B. A. Keen
W. B. Haines
Affiliation:
Soil Physics Department, Rothamsted Experimental Station
B. A. Keen
Affiliation:
Soil Physics Department, Rothamsted Experimental Station
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Extract

A new and improved type of dynamometer is described which by a simple interchange of parts can be used with the same percentage accuracy for all types of work from the lightest to the heaviest.

The instrument consists of (a) an hydraulic link weighing 16 1b. and placed in the hitch, (b) a recording mechanism weighing 15 lb. carried on any convenient part of the implement, and (c) a control box weighing 4 lb. carried by the operator. When packed in a stout box for transit and with all accessories the total weight is less than 100 lb. The instrument is of robust construction and has a minimum number of moving parts. Adjustments for stylus pressure, etc., are provided, but the necessity for using them hardly ever arises.

The instrument operates by recording the amount of movement in a Bourdon tube filled with oil and connected by narrow bore copper tubing to the oil in the hydraulic link.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 18 , Issue 4 , October 1928 , pp. 724 - 733
Copyright
Copyright © Cambridge University Press 1928

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References

REFERENCES

(1)Keen, and Haines, (1925). J. Agric. Sci. 15, 375–386. (Rothamsted Memoirs, 12.)CrossRefGoogle Scholar
(2)Haines, and Keen, (1925). J. Agric. Sci. 15, 387–394; 395–406. (Rothamsted Memoirs, 12.)Google Scholar