An Improved Front Set Off in the Check Actions of Pianofortes.
Year: 1893

page_text: Date of Application, 7th Sept., 1893
Complete Specification Left, 7th June, 1894-Accepted, 14th July, 1894
PROVISIONAL SPECIFICATION.
An Improved Front Set Off in the Check Actions of Pianofortes.
VINCENT ANGELLO HALLPIKE 213 Mare Street Hackney N.E. London in
the County of Middlesex Pianoforte Action Maker do hereby declare the nature
of this invention to be as follows:-
My application for the improvement of a front set off pianoforte check action,
described herein, is made as follows:-The action is made with a front arm,
projecting in lower part of sticker, with a regulating pin, with a button on the end
which comes in contact with an independent rail, called the set off rail which is
screwed on the standards at each end of the action. The said rail being bevelled
and blackleaded, with the result, that directly the note is struck it causes an
immediate escapement and check with less friction than in other actions for
pianofortes which I claim to be my invention.
Dated this 7th day of September 1893.
COMPLETE SPECIFICATION.
An Improved Front Set Off in the Check Actions of Pianofortes.
I VINCENT ANGELLO HALLPIKE, of 213ª Mare Street, Hackney, in the County
of London, England, Pianoforte Action Maker, 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:-
My invention relates to that part of the check action mechanism of a pianoforte
which is known as the "front set off" or escapement, and my object is to provide
a simple and convenient arrangement, that will minimise friction, and obtain
increased lightness of touch on the keys of the instrument, and also a more perfect
repeat action.
But in order that my invention may be better understood I will now refer to the
accompanying sheet of drawings which are to be taken as part of this Specification
and read therewith.
Figure 1, illustrates an elevation of, a one section note complete and Figure 2, is
a full sized, detail view of my improved set off mechanism.
Similar letters of reference indicate similar or corresponding parts where they
occur in both views.
Now my invention consists in providing the sticker (A) with an arm (B), in the
end of which is a regulating screw pin (C), and (D) is a felt faced button, secured
to said pin, for the purpose of engaging a rail (E) termed the set off rail which is
fixed to the standards arranged at both ends of the pianoforte; the lower portion of
said rail (E) is bevelled and blackleaded, so that when the note is struck, said
button (D) will come in contact with the bevelled portion (F), and slide outwardly
just sufficiently to canse an immediate escapement of the sticker (A) which imparts
motion to the hammer (G) in the ordinary way.
The use and action of my invention are as follows
When the key (H) is struck, the sticker (A) operates the hammer (G), through
the medium of the notch (I) in the hammer butt (J), at the same time the arm (B)
puts the regulating button (D) in contact with the bevelled portion of the rail (E)

page_text: and allows a slight outward movement of said button to take place, the result is
that the upper end of the sticker is also moved, which disengages it from the
notch (I) and allows the hammer to fall back slightly from its contact with a
wire (K) of the instrument. The same operation withdraws the damper (L) from
said wire, so that the note may be struck in quick succession without the damper
touching the wire until the hammer falls back upon its rest.
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,
A front set off in the check action of a pianoforte, consisting of the combination
and arrangement with a sticker (A) of an arm (B) provided with a button (D)
and regulating screw pin (C), to engage the bevelled portion (F) of a rail (E) for
the purposes herein described and as illustrated in my drawings.
2004
W. D. ROWLINGSON,
67-69, Chancery Lane, W.C., Agent for Applicant.
W. D. ROWLINGSON,
67-69, Chancery Lane, W.C., Agent for Applicant.