GB176330A - Grand piano - Google Patents

Abstract

176,330. Ritter Ges., C. R. March 2, 1921, [Convention date]. Pianoforte setters; strings, arrangement of; sound-boards; wrest-planks; keyboards.-To obtain greater sonorousness particularly in the deeper tones, the normal sound-board s of a horizontal pianoforte is arranged at a higher level than the keys, and a second, lower, sound-board t is provided below which the bass strings (or, as shown, duplicates g of the bass strings) are stretched, the tuning pins v being arranged as far forward as possible underneath the keyboard so as to give the maximum length of string. Where duplicate bass strings on the two sound-boards are provided, the keys k actuate both an upwardstriking action h and a downward-striking action i. The Specification as open to inspection under Sect. 91 (3) (a) states also that the simultaneous striking of the upper and lower strings may be produced by mechanical elastic or pneumatic couplings; or either or both strings may be struck at will on throwing reversing devices in or out by means of a pedal, draw-stop, or elbow lever. Or two keyboards may be provided, one operating on one set of strings only, and the other on both sets. This subject-matter does not appear in the Specification as accepted.