Siksakformet indretning af skruefjedre i apparater til frembringelse af kunstig efterklang.

摘要

Two consecutive portions of a single helical spring having a zig-zag arrangement are mutually interfitted with each other with their turns remaining out of contact, and with their taxes being in substantially tangential contact or, at the most, intersecting at an acute angle not in excess of 10 degrees. The ends of the two portions are firmly connected to each other directly at their deflection points, and the interconnection preferably is connected to one end of a soft spring whose opposite end is fixed to a rigid support. Consecutive helical spring portions may be wound in the same direction or in respective opposite directions.