Gear's illustrated catalogue of wood and iron working machinery (1872)
A.S. Gear, Gear, A. S · Boston : Printed at A.S. Gear's printing office, 62 Sudbury Street · leaf 396
E illustrates the tubular metallic frame, with standards for grand piano actions. Also several hammers withmechanism, in position. Figure F. … F illustrates the tubular metallic frame, with hangers, for upright pianos. Also, the screws for fastening the actionand standards (with conical half-round cavities), serving as points of support for the action. The scale of the Steinway upright piano leaves a number of intermediate spaces for…
