An Investigation of the Cross-Spring Pivot

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Abstract
It is the purpose of this paper to describe the characteristics of the cross-spring pivot, or elastic hinge, for large deflection angles. Design formulas are established for certain standard forms of the two-spring pivot on the basis of experimental results. Formulas are developed for the spring constant, bending stress, and motion of the pivot point; their application is illustrated by an example. A comparison of the various pivots, when used in lever systems, is made, and suggestions for the design of two-spring pivots are included.

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