Improvements in "Check Actions" of Pianofortes.
Year: 1893

page_text: Date of Application, 13th Apr., 1893
Complete Specification Left, 13th Feb., 1594-Accepted, 7th Apr., 1894
PROVISIONAL SPECIFICATION.
Improvements in "Check Actions" of Pianofortes.
I, HENRY MORRIS, of 6 Pigwell Path, The Grove, Hackney, Middlesex,
Pianoforte Manufacturer, do hereby declare the nature of this invention to be as
follows:-
This invention relates first to an improved spring connection between the lever
and the sticker of pianoforte actions; secondly, to an arrangement for "checking"
the action of the sticker.
According to the first improvement, I make the joint connecting the lever with
the sticker of a strip of metal, whalebone, or other springy or flexible material,
the ends of which are inserted in saw cuts in the lever and sticker respectively, and
secured by screws passed through the wood and the strip.
The metal or other spring strip may have one end attached to the sticker, and
be extended to the rear where it is fastened to a rail, the lever being in this case
dispensed with.
According to the second improvement, the sticker is guided in its up and down
motions between pins projecting from a rail in front, the amount of lift being
controlled by a regulator pin on the rail in conjunction with a projection piece on
the sticker. The nose of the sticker takes into a notch in the butt of the hammer,
from which a leg extends acted upon by a spring attached to the hammer rail. A
"check" pin is also arranged on the hammer butt (or it may be placed on the front
rail above mentioned) for controlling the "repeat" and damper actions.
10th
f Anil 1902
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Henry Morris.
COMPLETE SPECIFICATION.
Improvements in "Check Actions" of Pianofortes.
I, HENRY MORRIS, of 6 Pigwell Path, The Grove, Hackney, 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 certain improvements in or connected with the check
actions of pianofortes.
The invention will be clearly understood by the following description having
reference to the annexed drawings of which
Figure 1 is an elevation showing the hammer back upon its rest, and with the
sticker or jack in the step of the hammer butt.
Figure 2 indicates the sticker escaped from the step, and bearing against the
leather, such as when the hammer has rebounded and the sticker is waiting for the
key to be freed for the springy material strip or (in substitution for the usual
lever) which is attached to the sticker and lever rail respectively to pull the
sticker down upon the key, as seen at Figure 1.
Figure 3 represents a pianoforte action with the sticker guided between pins
projecting from the lower front rail, and with the head of the sticker in the step of
the hammer butt.

page_text: Figure 4 shows part of the same action but with the head of the sticker resting
against the leather of the hammer butt, as with respect to Figure 2.
Figure 5 iudicates the lever joined to the lever rail, and to the sticker
respectively by springy metal strips.
.A, the key. B, sticker. C hammer butt. D, hammer. E lever rail. Flever
or metal strip. G hammer rest. H step in hammer butt. I check pin in hammer
butt and through head of sticker. J set off at back of sticker. K damper.
L damper lever, and M wire therefrom to hammer butt. N guide pins on lower
front rail P, and Q projection on sticker to press against regulator pin R of lower
front rail P. S hammer rail. T spring, and U flexible strap connecting the leg of
the hammer butt to spring T. V string.
The metal springy strip, or wire spring F, Figures 1 and 3, in lieu of the
ordinary lever, or springy metal joints to the lever as at Figure 5 is an important
element in this my invention in which for export purposes they will be found of
advantage as will also the sticker and other parts of the action if made of light
metal, or equivalent material having a springy flexibility.
Another important element in this my invention is the guide pins N of the lower
front rail P for the sticker B to move in, in conjunction with a projection piece Q
on the sticker B and controlled by a regulator pin R of the lower front rail P.
The third element of novelty in this my invention is the leg of the hammer butt
being connected to the hammer rail S by a spring T, which with the regulator
pin I controls the repeat and damper motions.
I have shown the lever F as terminating with the sticker B but if of wire, said
strip F can be curled and pinned to the sticker B, and its end curved up to the
front of the sticker for springy action, as per dotted lines, Figure 1, or it may be
run up the back of the sticker and that part be made to serve as the sett off.
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. The springy strip F or its equivalent shown at Figures 1, 3, 5, substantially
as and for the purposes set forth.
2. The sett off spring J at back of sticker, substantially as described and shown.
3. The check I on hammer butt C working through a slot of sticker B, as at
Figures 1 and 2, of the annexed drawings.
4. The guide pins N of lower front rail P in conjunction with projecting piece Q
on sticker B, controlled by regulator pin R, as described and shown at Figures 3
and 4 of the drawings.
H
OHY OF reoriaPV 1894
ane UH OHY OF February 1894
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Henry Morris.