Improvements in Pianoforte Attachments.
Year: 1893

page_text: COMPLETE SPECIFICATION.
Improvements in Pianoforte Attachments.
I REGINALD HADDAN of the Firm of Herbert Haddan & Co., of 18 Buckingham
Street, Strand W.C. London, Patent Agent do hereby declare the nature of this
invention a communication to me from abroad by Vicente Casademont Noguer of
Barcelona in the Kingdom of Spain, Pianoforte Maker and in what manner the
same is to be performed to be particularly described and ascertained in and by the
following statement :-
The improved attachments consisting of safety string pins or pegs for pianofortes
which form the object of this invention have the advantage of not only being
simple and cheap in construction but afford absolute safety in holding the strings in
tension and facilitates their being tensioned to a high degree.
The improved attachments consist of three parts viz., the string pins or pegs, the
screw plate or holder, and the binding or attachment screw.
In the annexed drawing
Fig. 1 shows a cross section of these attachments
Fig. 2 the alternating arrangement of the pegs or pins,
Fig. 3 a peg in side elevation and
Fig. 4 a binding or attachment screw.
The pins B, Fig. 3, are made as shown with a flat head partly sloped; their
shaft is cylindrical at the portion which lies nearest to the head and conical or
prismatically shaped toward the end, serving as a fastening key similar to ordinary
pins. These pegs or pins have a little hole through which the ends of the strings
are passed and are mounted in the bridge A A as shown in Fig. 1 at certain
distances apart in the holes of the bridge, which holes are made true so as to allow
the pins or pegs to turn while however opposing a certain resistance owing to
frictional contact of the sides of the pins with the walls of the said holes. The heads
of the pins rest on the rear part of the bridge behind which there is mounted and
solidly fixed to the general framework a plate C C which possesses a screwed
orifice in front of or opposite each pin B and being the female screw for the
reception of attachment screws D which bear against the heads of the pins B at
one end, the other end being made conical or prismatic so as to be capable of being
screwed up and down by means of a key. By turning these screws D against the
heads of the pins B the frictional contact of the latter in their respective holes in
the bridge, is materially increased and in case any of the pins become loose, this
fault can be remedied by simply turning the binding or attachment screw D, lying
opposite the pin in question.
The arrangement of the attachment screws D behind the pins B serves more
efficiently to secure the frictional contact of these pins within the bridge since by
turning the attachment or binding screws the head of the pins also exerts an
efficient pressure upon the exterior surface of the bridge. However if desired
the whole of the attachment screws D may be left out while only the friction
against the surface of the holes and the rear part of the bridge is retained;
although doing this would be not so safe the strings could be maintained during a
long time in tension and at a cheaper rate.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
The improved string pins or pegs B kent in position by frictional content within

page_text: and upon the rear part of a bridge A with or without the attachment plate or
screw holder C fitted to receive binding screws D all substantially as illustrated
and described and for the purposes set forth.
Dated this 12th day of October 1893.
R. HADDAN.