IMPROVEMENTS IN STRING-ATTACHMENTS FOR PIANOS AND SIMILAR STRINGED INSTRUMENTS
Year: 1881

page_text: LETTERS PATENT to Herbert John Haddan, of the Firm of Herbert and
Company, Solicitors of Patents, of 67, Strand, in the City of Westminster,
Civil Engineer, for an Invention of "IMPROVEMENTS IN STRING-ATTACHMENTS
FOR PIANOS AND SIMILAR STRINGED INSTRUMENTS." A communication from
COMPLETE SPECIFICATION filed by the said Herbert John Haddan at the
Office of the Commissioners of Patents on the 30th March 1881.
"
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors of
Patents, of 67, Strand, in the City of Westminster, Civil Engineer. "IMPROVEMENTS
IN STRING-ATTACHMENTS FOR PIANOS AND SIMILAR STRINGED INSTRUMENTS.'
A communication from abroad by Julius Bennert, of Cologne, in the German
Empire.
This Invention has for its object to diminish the wear and tear of those parts of
the instrument in which the pegs or straining pins are situated, and to prevent the
unintended back motion of the pegs after having once been fixed.
The accompanying Drawings show several forms of the Invention as applied to a
piano; the corresponding arrangement for other kinds of pianos or piano-like
instruments follows as a matter of course and needs no explanation. The improved
pegs may be used at one end of the strings, as shown in the Drawing, or at both
ends. Figure 1 is a plan of the device, while Figure 2 is a side view, and Fig. 3 a
section; Figure 4 is a detail view of a friction peg or straining pin, with the lock
nut n, and Figures 5 and 6 are modifications of the device in section and side
view.
In the device illustrated by Figures 1-4 the friction peg is divided into two parts
by the circular shoulder a, the lower part b being made with parallel sides,
preferably cylindrical, and projecting into a corresponding socket of the pin
board R, which may be of wood or metal, and in which it can be turned without
a screw-thread. The upper end c of the pin is squared and fits into the tuning
key. The cover plate d is passed over c, c, c, and secured to the pin board by

page_text: 1. In string attachments for pianos and similar instruments a friction peg or
straining pin consisting of a lower part capable of being turned in a corresponding
socket of the pin board without a screw thread, an upper part adapted to be turned
by a key and a collar separating the upper from the lower part, substantially as
described and illustrated by Figures 2 and 3.
2. A friction peg or straining pin consisting of an upper part adapted to be turned
by a key, a conoidal lower part fitted into the pin board and capable of turning in
the same, and a collar between the upper and lower part, substantially as described
and illustrated by Figure 6.
3. A friction peg or straining pin consisting of an upper part c adapted to be
turned by a key, and a collar a resting on the pin board, substantially as described
and illustrated by Figure 5.
4. The combination of pegs provided with collars a with a coverplate d and
screws 8, 8, substantially as and for the purpose described.
5. The combination of friction pegs, as specified in claims 1, 2, and 3, with lock
nuts n, substantially as described and illustrated by Figure 4.
6. The combination of friction pegs, as specified in claims 1, 2, and 3, with a
cover plate d, screws 8, 8, 8, and binding screws x, substantially as described and
illustrated by Figure 2.
In witness whereof, I, the said Herbert John Haddan, have hereunto set my
hand and seal, this Thirtieth day of March, A.D. 1881.