| 摘要 |
<p>The proposed method of winding a flexible element onto a drum permits the use of very simple lever-type lifting-transport devices in restricted spaces and involves tensioning the flexible element and affixing it to the drum at any intermediate point, rotating the drum in steps about an axis of rotation in the direction of wind and, between contiguous steps, reversing the position of the axis of rotation. The drum for winding a flexible element in the claimed manner is formed by two side plates separated by a distance equal to the width of the flexible element. One plate is provided with an element for fixing the drum to the lever, said element being located outside the space between the planes of the plates. The central part of the drum onto which the flexible element is wound is formed by two pins joined to the plates and spaced along the line of the lever to form a slot in which the flexible element is accommodated and secured. Various combinations of the connections described constitute the various embodiments of the proposed drum.</p> |
