An Improved Wrest Pin Piece for Pianofortes, Zithers, and the like.
Year: 1895

page_text: Date of Application, 20th Sept., 1895-Accepted, 9th Nov., 1899
COMPLETE SPECIFICATION.
An Improved Wrest Pin Piece for Pianofortes, Zithers, and
the like.
I ALFRED GEORGE BROWNE of 81 Linnæus Street, Hull in the County of
Yorks, Manager, do hereby declare the nature of this invention, and in what
manner the same is to be performed, to be particularly described and ascertained
n and by the following statement :-
My invention relates to improvements in the wrest pin plank of pianofortes, by
the substitution of an entire metal pin piece for the present combination of wood
and metal, and embraces a solid metal wrest pin piece which gives all the
advantages to be obtained from the combined wood and metal back in addition to
the greater security obtained by putting the whole tension upon the metal instead
of dividing it between the wood and metal as at present.
DESCRIPTION OF DRAWINGS.
Fig. 1 is a front elevation of a solid metal pianoforte frame with my improvements
applied.
Fig. 2 is a sectional view of part of Fig. 1 shewing section of three holes, and
plugs with wrest pins in position.
Fig. 3 is a sectional view of part of wrest pin piece drawn to an enlarged scale
to show hole and plug more clearly.
Fig. 4 shows sectional view of hollow pin piece with plank driven in to take place
of wooden plug.
Figs. 5. 6. and 7. show side elevation, sectional elevation and front view
respectively of a suitable plug for inserting in holes.
For the purpose of my invention 1 dispense with the ordinary wooden wrest pin
plank and make a wrest pin piece A of metal, in place of it and preferably cast in one
piece with the metal frame B of the instrument. This wrest pin piece has holes C
bored or formed in it, such holes being of any suitable shape, into which wooden
plugs D of a similar shape are driven, the pins E wbich take the strings being
driven into these plugs in the same manner as they would be driven into the
When the said pins E are driven into the said
ordinary wooden pin plank.
plugs D they are held quite firm, and if the plugs become worn after use, either
0 larger pins can be used or new plugs easily inserted in place of the old ones.
The plug holes C may be made the same size all through the wrest pin piece A
or may be reduced towards the back and end in which are small holes G to allow
the air to escape as the plugs are being driven.
The plugs may be made as shown in Figs. 5, 6, and 7 having a lug on each, for
35 the purpose of preventing the said plugs D turning when they are once driven in
the holes C, an air hole being formed in the lug for air to escape through F when
being driven.
As a modification of the said solid metal wrest pin piece, I may construct it
hollow so as to lighten it, a wooden block or board D being placed inside to take the
40 place of the wooden plugs, see Fig. 4.
With my improvements the ordinary wooden wrest pin plank is dispensed with
as well as the bracings, the metal wrest pin piece which I employ being mor
durable and stronger. The sounding board would still be constructed of wood a

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. Constructing the wrest pin piece A of pianofortes and the like, of metal,
preferably in one piece with the frame, forming holes C therein, in which are wood
plugs D, to receive the wrest pins. E, the said holes and plugs being of any suitable
shape to prevent them turning with the wrest pins, and having air holes F,
substantially as shown and described.
2. The use and employment in pianofortes, of hollow wrest pin pieces A, having
wood plugs D, substantially as shown and described.
Dated this Nineteenth day of September 1895.
JOHN E. WALSH,
Savile Street, Hull, and Crossley Street, Halifax,
Patent Agent for the Applicant.
JOHN E. WALSH,
Savile Street, Hull, and Crossley Street, Halifax,
Patent Agent for the Applicant.