Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 566
the rails to the chairs.—Various methods have been devised for fastening the rail to the chair.Iron wedges, keys, and pins, and sometimes a union of all three, have in their turn had their advocates ;but all metal fastenings are objectionable, as all are found to work loose. Wooden keys or wedges… … -^.^U n These rails are secured to the chair by a wooden key, aa. Figs. 3184 and 3185. One side of the chairis bevelled vertically, against which the wedge acts, and pressing against the upper side of the base ofthe rail, forces it downwards into the chair, while it, at the same time, forces the…
Mechanical engineering · Mechanics · Engineering
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