English: From the patent:

"B, C, D, is a plate of cast iron or other metal, the back part B, being intended to fit closely and to be secured by any convenient means to the surface of the tuning block, which it entirely covers, the part C nearly representing in form the ordinary "metallic plate" of a square pianoforte; and the part D, representing, as it were, an additional "metallic plate." The part B, as far as b, and the part D, of the plate are of the same height, but the part C, and that part of B, extending from it to b, are slightly recessed or lower than the first named parts. A deep ribbed stay E, extends from the from of the part B, across the front of C, to D, uniting all the said parts in front, and another stay F, crosses nearly parallel to E, also uniting the said parts; another G, extends from B, uniting it with the end of the part C, and with the stay E, near the middle of its length ; and another J, from the back end of G, to E; one H, unites B, C, E, and F, and two others I, I, until B, C, and F. All the above braces are cast with the plate.

"a¹', a², a³, and a⁴ in Fig. 1, represent each respectively a set of three strings seach[sic] set forming a note of one of three higher octaves; ...those a¹, a², a³, and a⁴, being secured in the usual manner to pins or studs c, c, c, c, in the part C, of the plate, and tuning pins d, d, d, d, screwed through the recessed part of the plate between b, and D into the tuning block and those a⁵, a⁶ and a⁷, being secured to pins or studs e, e, e, in the part D, of the plate into the tuning blocck, the three last named strings are thus higher than the first four, and pass over across them the strings of the lower octave running nearly the whole length of the instrument and those of the other octaves decreasng in length in suitable proportion.

"By this arrangement of the strings it will be understood readily that the strings can all be made larger and there can be an increased number to each note as there is more room for them and the power and tone of the instrument will thus be increased in every respect. Great stiffness is obtained for all the parts by the extension of the metallic plate and the mode of bracing, all the braces running in the same direction as certain of the strings. The liability of the tension of the strings to be altered by change of temperature is also reduced.

"No material alteration in the striking action or in any other part of the instrument is rendered necessary by the above improvement, therefore the description is confined to those parts alone which the improvements relate.

"I do not confine myself to the arrangement of any given number of strings in either direction."