Improvements in Pianofortes.
Year: 1886

page_text: Date of Application, 25th Oct., 1886.
Complete Left, 24th Aug., 1887.
Complete Accepted, 27th Sept., 1887.
PROVISIONAL SPECIFICATION.
Improvements in Pianofortes.
I, JOSEPH DELERUE of 2 Rue Sainte Appoline, Paris, France, Pianoforte Manufacturer
do hereby declare the nature of this invention to be as follows:-
:-
This invention refers to improvements in attaching the strings of pianos, as
hereafter described, by what may be termed equilibrium pegs and consists in adding
to the ordinary tuning peg or movable peg a second and fixed peg serving as an
additional fastening for the string; and the invention will be best understood by
reference to the accompanying drawings.
Figure 1 is a front view or plan, and Figure 2 is a side elevation partly in section,
of an arrangement according to my invention.
S shows a portion of the sound board or support of the string stretching apparatus
of a pianoforte. A is an ordinary peg similar to those now used in pianos for the
tension of the cord; B represents a sound or additional peg shorter than the first
named and without holes or square head for the key, this peg is fixed and serves as a
support. This additional peg B is fixed on the sound board S about an inch above
or beyond the first peg A in a straight line and in the direction of the string.
C, C, C, C show a piano string firmly fixed or secured at one of its ends C¹,
the other or free end being passed round the first peg A and then a half turn of the
string is taken on the fixed peg B and then again brought towards the peg A the end
of the cord is passed through the hole provided in peg A and twisted in the usual way
in order to obtain the proper tension of the string.
Through well known physical laws it will be understood that if the string
C, C¹, C, C is bent on a fixed support represented by the second peg B of my

page_text: invention, the traction or power of the string C, C¹, C", C is reduced or lessened
by say one half on the support part, and that the movable peg A as a support of the
string has only to support or maintain half the tension of the string; besides as the
latter is turned round once on the peg A before being bent round the peg B,
it follows that the peg A is kept in a state of equilibrium. This particularity has been
my reason for adopting the denomination above given for my new mode of fixing the
strings of pianofortes, the result of which is to ensure a tension as perfect as may be
of the string, and consequently to obtain a complete fixity of tune of the instrument.
Dated this 25th day of October 1886.

page_text: I JOSEPH DELERUE of 2 Rue Sainte Appoline, Paris, France, Piano-forte
Manufacturer do hereby declare the nature of my said invention and in what manner
the same is to be performed to be particularly described and ascertained in and by
the following statement:-
This invention refers to improvements in attaching the strings of pianos as hereafter
described by what may be termed equilibrium pegs, and consists in adding to the
ordinary tuning peg or movable peg a second and fixed peg serving as an additional
fastening for the string, and the invention will be best understood by reference to the
drawings filed with my provisional specification of which Figure 1 is a front view
or plan, and Figure 2 is a side elevation partly in section of an arrangement
according to my invention.
peg
S shews a portion of the sound board or support of the string stretching apparatus
of a pianoforte. A is an ordinary peg similar to those now used in pianos for the
tension of the cord. B represents a second or additional peg shorter than the first
named, and without holes or square head for the key, this peg is fixed and serves as a
support. This additional B is fixed on the sound board S about an inch above or
beyond the first peg A in a straight line and in the direction of the string.
C, CCC shew a piano string firmly fixed or secured at one of its ends C³,
the other or free end being passed round the first peg A and then a half turn of the
string is taken on the fixed peg B and then again brought towards the peg A the end
of the cord is passed through the hole provided in peg A and twisted in the usual way
in order to obtain the proper tension of the string.
Through well known physical laws it will be understood that if the string
C C C C is bent on a fixed support represented by the second peg B of my
invention, the traction or power of the string CC C C is reduced or lessened by
say one half on the support part, and that the movable peg A as a support of the
string has only to support or maintain half the tension of the string; besides as the
latter is turned round once on the peg A before being bent round the peg B it follows
that the peg A is kept in a state of equilibrium. This particularity has been my
reason for adopting the denomination above given for my new mode of fixing the
strings of pianofortes, the result of which is to ensure a tension as perfect as

page_text: may be of the string and consequently to obtain a complete fixity of tune of the
instrument.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is :
In pianofortes the employment of a second and fixed peg B together with the mode
described of attaching the strings substantially as and for the purposes hereinbefore
described and illustrated with reference to the drawings.
D
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