Improvements in Upright Pianoforte Actions.
Year: 1892

page_text: Complete Specification Left, 21st June, 1893-Accepted, 22nd July, 1893
PROVISIONAL SPECIFICATION.
Improvements in Upright Pianoforte Actions.
We BROOKS LIMITED of 31 Lyme Street Camden Road, in the County of
London, Pianoforte Action Manufacturers, and JAMES JOSEPH ROBINSON
of 31 Belle Vue Road, Friern Barnet, in the County of Middlesex, Pianoforte
Manufacturer do hereby declare the nature of this invention to be as follows:
According to our invention we form the sticker and other of the parts much as
usual in check actions generally in use in the trade. but the set off..is, modified by
connecting an arm or link from the lower end of the sticker to a flinge from the
lever rail and from this arm projects a wire or arm which operates on a clothed
inclined surface formed at the lower end of a lever supported on a hinge or
centreing towards its middle and having. another, inclined surface at its other end
which is acted upon by and acting on a button mounted on a screw affixed in the
upper part of the sticker in order to set the sticker out of the notch: of, the
hammer butt with increased efficiency.
By these means the sticker acts by its rising on the hinged arm and thereby on
the pin and the end of the hinged set off carried also from the set off or lever rail,
so that the operation 'takes effect' where the lifting power is greatest and the set
off is effected where the resistance is least.
::
,
Or the hinged. set off lever may be hinged to the hammer rail and be long
enough to reach the wire or arm connected to the bottom end of the sticker link
referred to.
Dated the 22nd dovr of August 1802
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Upright Pianoforte Actions.
We, BROOKS LIMITED, of 31 Lyme Street Camden Road, in the County of
London, Pianoforte Action Manufacturers, and JAMES JOSEPH ROBINSON
of 31 Belle Vue Road Friern Barnet, in the County of Middlesex, 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 :-
This invention relates to improved construction of set off mechanism for upright
pianofortes.
According to our invention and as shewn we form the sticker a and other of the
parts much as usual in check actions generally in use in the trade but the set off
is modified by connecting an arm or link 6 from the lower end of the sticker a
to a flinge c from the lever rail d and from this arm 6 projects a wire or arm e
which operates on a clothed inclined or other surface formed at the lower end
of a lever supported on a hinge or centreing f* towards its middle and having
another inclined or other surface fat its other end which surface is acted upon
by and acts on a button gl mounted on a screw g affixed in the upper part of the
sticker a in order to set the sticker a out of the notch h' of the hammer butt /
with increased efficiency.
By these means the sticker a acts by its rising on the hinged arm b and thereby
on the pine and the end of the hinged set off lever which may be carried
also from the set off or lever rail d. Or as is here shewn the hinged set off lever f
Γυ... 0 17

page_text: may be hinged to the hammer rail i and be long enough to reach the wire or
arm e connected to the bottom end of the sticker a by link 6 referred to the same
effect being in either case attainable so that the operation takes effect where the
lifting power is greatest and the set off is effected where the resistance is least.
jis the hammer. is one of the keys or levers one of the wires but these
and other of the parts not especially referred to are of ordinary and well
understood character.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what
we claim is
In an upright pianoforte action.
19
1. The combination or arrangement and use of the set off parts b, e, f and
with the ordinary parts of the mechanism so as to enable those said parts to
co-operate therewith substantially as and for the purpose set forth and shewn by
the drawing.
2. The combination or arrangement and use of the mechanism for producing
an efficient set off, with the sticker action as and for the purpose set forth and
shewn by the drawing.
Dated the 21st der of June 1893.
WM. BROOKES & SON,
-55 & 56, Chancery Lane, London, Agents for the Applicants.