| 摘要 |
An elongate resilient supporting member, designed to absorb transverse stresses, includes a throughgoing leaf spring along with one or more reinforcing elements disposed along the broad spring surface which increase the spring stiffness upon deflection thereof from a normal position. The reinforcing elements may be a set of longitudinally spaced abutments on the spring surface, produced in the simplest manner by transverse incisions on the spring body; several springs so notched may be superposed to form a stack. Alternatively, the reinforcing elements are part of a column or stack surrounding the spring on which they may slide freely or to which they may be attached in spaced-apart relationship. The overall resiliency of the member may be varied with the aid of an eccentric subjecting the column to adjustable axial pressure, this eccentric acting against the force of a compression spring surrounding the leaf spring within the column. The reinforcing elements can also engage the leaf spring through a lost-motion connection which gives them relative axial mobility unless the lost motion is eliminated by manually or otherwise operable control means.
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