Henry Baldwin

“ Dialogue, this court held, in 1829, 'That if an inventor makes his discovery public, looks on, and permits others freely to use it, without objection or assertion of claim to the invention, of which the public might take notice ”

“ On the trial it appeared in evidence that it had long been a desideratum to find out some mode by which iron rollers or cylinders could be so cast that when the metal was introduced into the mould it should cause a swyrl or rotatory motion, by which the flog or dross would be thrown into the centre instead of the surface of the cylinder. ”

“ This case comes here on a writ of error to the Circuit Court for the western district of Pennsylvania, in an action brought by the plaintiffs, assignees of James Harley, against the defendants, for the infringement of a patent granted to Harley for an improvement in the mode of casting chilled rollers and other metallic cylinders and cones, in which judgment was rendered for the defendants. ”

“ This was the thing patented, consisting solely in changing the direction of the tube, which conveyed the metal to the mould, from a horizontal or perpendicular position to an angular one; it produced the desired effect and was highly useful. ”