Improvements in Planofortes.
Year: 1889

page_text: Date of Application, 6th Feb., 1889
Complete Specification Left, 6th Nov., 1889-Accepted, 25th Jan.,
ADRAINYA A MESAYAI
1890
PROVISIONAL STE
Improvements in Planofortes.
I LORENZ HUPPLER of 4 St. James Street, Halifax in the county of York,
Pianoforte Maker, do hereby declare the nature of this Invention to be as
follows:-
÷-
My improvements consists in constructing pianofortes with single iron frames
without any back or other support for both horizontal or upright pianofortes, and
with iron pressure bars; the strings run in the centre of the iron frame, thereby the
strain from them is equally balanced; the frame is so constructed that the sound-
board can be easily and readily taken out and replaced when required.
JOHN E. WALSH,
Crossley Street, Halifax, Agent for the Applicant.
Pianoforte Maker, do nereby declare
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
My improvements consist in constructing pianofortes with single iron frame,
without any back or other support, or material, for both horizontal or upright
pianofortes, and with iron pressure bar for horizontal pianofortes, cast upon such
frame.
The strings run in the centre of the iron frame, thereby the strain from them is
equally balanced; the frame is so constructed, that the soundboard can be easily and
readily taken out and replaced when required.
DESCRIPTION OF DRAWINGS.
Fig. 1 is a front elevation of my improved frame.
Fig. 2 is a side elevation of Fig. 1 with end removed.
Fig. 3 is a front elevation in section of part of a horizontal pianoforte, with my
improvements applied.
Fig. 4 is an enlarged detail of pressure bar, shown at Fig. 3.
I construct my pianofortes with single iron frame A without any back or other
support or material, the strings B run in centre of the iron frame A, thereby the
strain from them is equally balanced or divided upon the frame.
In this frame, I also construct a slot or groove D on the curved side or termination
of string, in which is inserted wood packing for facilitating the adjustment of the
bearings of the strings B, upon the bridge of the soundboard F, should the frame
be warped thereby keeping all the strings at one level.
To take away any false harmonics, 1 make the rest E for the strings with
a bevelled face and of half iron and half wood, the strings bear against such rest.
The frame A is so constructed, that the soundboard F can be easily and readily
taken out and replaced if required, and the frame A may also be quickly and securely
fixed in the outer case by means of the dovetails H at each side of the frame.
In horizontal pianofortes (see Fig. 3) I cast the iron pressure bar G upon the
frame A, and with a groove in which I place a wood lag G¹ with a bevelled
face, which has the same effect upon the strings as the rest E in upright
nianofortes

page_text: 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 :-
1. In upright pianofortes, the construction of an iron or metallic frame so that the
strain from the strings is equally balanced upon the frame, substantially as shown
and described.
2. In horizontal pianofortes, the construction of an iron or metallic frame with
the pressure bar cast upon same substantially as shown and described.
3. In pianofortes, the construction of the rest for the springs, of half
iron and half wood, as and for the purposes, substantially as shown and
described.
4. In pianofortes, the construction of the metallic frame A, with groove D, as
and for the purposes substantially as shown and described.
Dated this Fifth day of November 1889.
JOHN E. WALSH,
Agent for the Applicant.