Improvements in Upright Pianoforte Actions.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in Upright Pianoforte Actions.
I HENRY MANSFIELD trading as Burling & Mansfield, of 381 Euston Road,
in the County of London, Pianoforte Manufacturer do hereby declare the nature
of this invention to be as follows:-
The invention has for its object to improve the construction of upright pianoforte
actions by an improvement in the form and arrangement of the front set off parts
by which a better effect with simplicity and certainty of operation in use is
attained.
To the front of the sticker or prolonge is applied or formed an arm in which is
mounted a screw pin carrying a clothed button. This button has a set off effect
by coming against an inclined surface formed on or carried by a suitable fixed bar
or rail provided for the purpose.
By means of a suitably formed outer end this screwed pin can be adjusted in
the sticker arm or projection and the contact of the button and incline thereby
regulated as desired and thereby also the blow of the hammer on the string is also
capable of regulation with extreme delicacy and simplicity by ordinary operators
or tuners.
According to a modification the inclined surface may be mounted on and carried
by the sticker or prolonge and in the movement of the parts this incline comes
against and sets off against an adjustable but otherwise fixed part mounted on and
carried by a suitable rail in front of stickers or prolonges.
Dated the 8th day of January 1895
WM. BROOKES & SON,
55 & 56 Chancery Lane, London, Agents for the Applicant.
Improvements in Upright Pianoforte Actions,
I HENRY MANSFIELD trading as Burling and Mansfield, of 381 Euston Road,
in the County of London, Pianoforte Manufacturer, do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
The invention has for its object to improve the construction of upright pianoforte
actions by an improvement in the form and arrangement of the front set off parts
by which a better effect with simplicity and certainty of operation in use is
attained.
To the front of the sticker or prolonge is applied or formed an arm in which is
mounted a screw pin carrying a clothed button. This button has a set. off effect

page_text: by coming against an inclined surface formed on or carried by a suitable fixed bar
or rail provided for the purpose.
By means of a suitably formed outer end this screwed pin can be adjusted in
the sticker arm or projection and the contact of the button and incline thereby
regulated as desired and thereby also the blow of the hammer on the string is also
capable of regulation with extreme delicacy and simplicity by ordinary operators
or tuners.
According to a modification the inclined surface may be mounted on and carried
by the sticker or prolonge and in the movement of the parts this incline comes
against and sets off against an adjustable but otherwise fixed part mounted on and
carried by a suitable rail in front of the stickers or prolonges.
Fig. I snews by a left hand side view an upright pianoforte action according to
my improvements, in a position of rest.
Fig. 2 shews the same, by a like view, in check.
Fig. 3 is a like view to Fig. 1 shewing the improvements according to a
modification.
Figs. 4 and 5 shew further modifications of my improved upright pianoforte
action.
The front ends of the keys in the various figures are shewn broken away for
the convenience of the drawings.
a indicates one of the keys, centred at a'. b is the sticker or prolonge with its
lower end resting on the key a.
The rail b¹ carries the lever arm 62 to the sticker.
The support c¹ of the check c is carried by the check arm c² from the sticker b,
d is the hammer centred at d¹ and carried by the hammer rail d². The check
arm carries adjustably the end e¹ of the rod e connected to the lever e² carrying
the damper and centred at e³ to the damper rail e. The string is indicated at g.
On the hammer d is mounted the balance head d³ which engages with the check c
when in the "check position see Fig. 2. h is a spring, fixed to the sticker at h¹,
and hooked to a loop d on the hammer, thus serving to keep the hammer and
sticker in contact.
"
This arrangement of parts for actuating the damper, as well as the method
herein shown for actuating the sticker or prolonge, are of ordinary construction and
well understood.
In Figs. 1 and 2 the sticker is shewn. provided with an arm 6' in which is
mounted a screw pin carrying a clothed button 6. This set off button 65 comes
against an inclined surface 6 on the fixed bar 67 the contact being regulated as
desired by means of the screw pin 64 thus enabling the blow of the hammer to be
easily regulated with great nicety.
In the modification shown in Fig. 3 the arm 63 from the sticker has mounted on
it the inclined surface 66, and in the movement of the parts this incline comes
against the set off button 6 which in this case is carried by a screw pin 6 mounted
in a fixed rail or bar b'. The screw pin 6 gives capability of delicate adjustment
as already described.
Fig. 4 shews a modification in which the check arm c² is utilized for carrying
the screw pin which carries the set off button 68. This button 65 comes against
an inclined surface 6 on the fixed rail 6' provided for the purpose, the contact
being regulated by means of the screw pin 6.
In the modified form of my improvements shewn in Fig. 5 the check arm c² has
a downwardly projecting arm ³ in which is mounted the screw pin 64 carrying the
clothed button 6 which comes against and sets off against the incline 66 upon the
fixed rail provided for the purpose, adjustment being obtained by means of
the screw pin 6 as described with respect to the previous figures. The bar or
rail 6 is supported by means of the stay i.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
The improved forms and arrangements of parts of a pianoforte which form the
front set-off device, whereby a better effect is obtained, as set forth.
Dated the 8th day of October 1895.
WM. BROOKES & SON,
55 & 56 Chancery Lane, London, Agents for the Applicant.