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Tenterhooks or tenter hooks are hooked nails used with a device known as a tenter, a wooden frame, used since at least the 14th century in the process of making woolen cloth, over which wet cloth would be stretched to prevent shrinkage as it dries, but now superseded by the stenter in the textile manufacturing industry.
An axlebox, also known as a journal box in North America, is the mechanical subassembly on each end of the axles under a railway wagon, coach or locomotive; it contains bearings and thus transfers the wagon, coach or locomotive weight to the wheels and rails; the bearing design is typically oil-bathed plain bearings on older rolling stock, or roller bearings on newer rolling stock.
The wet cloth was stretched on a large wooden frame, referred to as a "tenter", and left to dry. To accomplish this, lengths of wet cloth were fastened to the tenter's perimeter using hooks (nails driven through the wood) all around the frame. This ensured that, as the cloth dried, it would maintain its shape and size. [5]
There are heddles made of flip-flopping rotating hooks, which raise and lower the warp, creating sheds. The hooks, when vertical, have the weft threads looped around them horizontally. If the hooks are flopped over on side or another, the loop of weft twists, raising one or the other side of the loop, which creates the shed and countershed. [10]
The basic type of coupling on railways following the British tradition is the buffer and chain coupling. A large chain of three links connects hooks on the adjoining wagons. These couplings followed earlier tramway practice but were made more regular. Buffers on the frame of the wagon absorbed impact loads, as the train overran a slowing ...
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