IMPROVEMENTS IN HORIZONTAL PIANOFORTES.
Year: 1853

page_text: LETTERS PATENT to George Henry Brockbank, of 3, Crawley
Street, Oakley Square, for the Invention of "IMPROVEMENTS IN
HORIZONTAL PIANOFORTES.
Sealed the 29th September 1858, and dated the 4th April 1853.
PROVISIONAL SPECIFICATION left by the said George Henry
Brockbank at the Office of the Commissioners of Patents, with
his Petition, on the 4th April 1853.
I, GEORGE HENRY BROCKBANK, of 3, Crawley Street, Oakley Square,
do hereby declare the nature of the said Invention for "IMPROVEMENTS
IN HORIZONTAL PIANOFORTES " to be as follows:-
This Invention consists of applying an additional rest plank in com-
bination with the one now in use, together with metal bars, the rest
pins being caused to pass through and rest within the additional rest
plank (which it is preferred should be of metal), and to fix in the
ordinary rest plank, as formerly.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said George Henry Brockbank, in the Great Seal
Patent Office, on the 4th October 1853.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I,
GEORGE HENRY BROCKBANK, of 3, Crawley Street, Oakley Square,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fourth day of April, in the year
of our Lord One thousand eight hundred and fifty-three, in the six-
teenth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said George Henry Brockbank, Her
special licence that I, the said George Henry Brockbank, my execu-
tors, administrators, and assigns, or such others as I, the said George
Henry Brockbank, my executors, administrators, and assigns, should
at any time agree with, and no others, from time to time and at all
times thereafter during the term therein expressed, should and law-
fully might make, use, exercise, and vend, within the United Kingdom
of Great Britain and Ireland, the Channel Islands, and Isle of Man,
an Invention for "IMPROVEMENTS IN HORIZONTAL PIANOFORTES," upon the
condition (amongst others) that I, the said George Henry Brockbank,
by an instrument in writing under my hand and seal, should par-
ticularly describe and ascertain the nature of the said Invention, and
in what manner the same was to be, performed, and cause the same
to be filed in the Great Seal Patent, Office within six calendar months
next and immediately after the date of the said Letters Patent.
NOW KNOW. YE, that I, the said George Henry Brockbank, do
hereby declare the nature of the said Invention, and in what manner
the same is to be performed, to be particularly described and ascer-
tained in and by the following statement thereof (that is to say):
This Invention consists of applying an additional wrest plank, in
combination with the one now. in use, together with- metal bars, the
wrest pins being caused to pass through and rest within the addi-
tional wrest plank (which it is preferred should be of metal), and to
fix in the ordinary wrest plank, as formerly.

page_text: And, in order that my said Invention may be most fully understood
and readily carried into effect, I will proceed to describe the means
pursued by me.
a,
DESCRIPTION OF THE DRAWING.
Figure 1, is a plan of the wrest plank, through which the wrest pins
pass; and Figure 2, is a transverse section of the two wrest planks.
is the ordinary wrest plank, into which the wrest pins are placed;
b, is the additional wrest plank, through which the wrest pins pass, and
within which they rest, as is shown; c, c, are metal bars to receive and
resist the pressure of the additional wrest plank b.
I would remark, that I have not thought it necessary to show a
complete grand pianoforte, as a workman will, from the description
above given, aided by the drawing, readily understand the Invention.
Having thus described the nature of my Invention, and the manner
of performing the same, I would have it understood that I do not
confine myself to the precise details or forms of the parts, as they may
be varied without departing from my Invention; but what I claim is,
the application of an additional wrest plank, placed above the ordinary
wrest plank, causing the wrest pins to pass through and rest within the
additional wrest plank, so that the strings pass between the two wrest
planks.
In witness whereof, I, the said George Henry Brockbank, have
hereunto set my hand and seal, this Fourth day of October,
in the year of our Lord One thousand eight hundred and fifty-
three.
GEORGE HENRY BROCKBANK. (L.S.)
Witness, FRED* HARRIS.