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 402
s, there was a considerable loss of power.The motion of the key was towards the player, while the balancier, with the lever, moved in an arched line and oppositedirection, away from the player. As a result of Steinways invention, these points roll without friction and loss of force, and reduce the… … £. J. OILL£if. A./. Q illustrates the construction of Steinways new repetition action, with patent tubular metallic frame.Secured by letters patent No. 170645, dated October 20, 1875. * The escapement in the English action is effected by the principle of the inclined plane, and in the French, by…
