| 摘要 |
<p>418,571. Springs. PULVERMACHER, E., 100, Berlinerstrasse, Haspe, Hagen, Westphalia, Germany. April 26, 1934, No. 12608. Convention date, April 26, 1933. [Class 108 (iii).] An annular spring particularly for use as a buffer comprises a slit inner ring b having conical extremities of equal or unequal depth co-operating frictionally with two conical outer rings a, c of constant thickness and of equal or unequal depth, the outer extremity of each ring a, c being bent inwards or otherwise formed to provide a strengthening and guiding edge. The ends of the ring b may be shaped as shown in Fig. 4 to provide friction surfaces f, g which coact on compression of the spring and consequent decrease in diameter of the ring b, or the surfaces f, g may be inclined or the ends of the ring may be shaped as shown in Fig. 5, in which cases a twisting action occurs on compression of the spring. In another construction, Fig. 7, the ring b comprises a number of layers having oblique openings, such as shown in Fig. 6, crossing each other. In a modification the layers are separated and come into action successively.</p> |
