MR. GEORGE HAWKS'S (GATESHEAD, DURHAM), for a Method of making and keeping in repair, Cast-iron Wheels for Coal-waggons, &c.

다국어 초록 (Multilingual Abstract)

The usual method of making iron wheels for coal-waggons, and other carriages where such wheels are applicable, is to cast their arms and rims in one entire piece, by which method they are partially weakened by the irregular contracting of the arms and rims in cooling, and are consequently subject to be frequently broken from trifling shocks or jerks; and when the rims are worn out or broken, or when any other part of the wheel is injured, the whole wheel becomes useless, and must be replaced by an entire new one; these defects are removed by this invention, which consists simply in making or casting the wheel in two or more parts, and in joining those parts together by screws, &c.