Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892)
Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 179
Fig. 6.—Bradley expansion arch cultivator. 1G4 CULTIVATORS. … Fi.i. 7.—Ouul.le-blade cultivator. by which it passes obstructions without the risk of breakage. The pivots a c and d arenormally nearly in line, allowing the strong spiral springs to ofiEer a very stout resistance to the flexion of the pivot c ; butwhen the limit of that resist-ance is once…
Mechanical engineering
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