Improvements relating to Stop Mechanism for Organs.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements relating to Stop Mechanism for Organs.
I, CHARLES FREDERICK BRINDLEY, of Suffolk Road, City of Sheffield, Organ
Builder, do hereby declare the nature of my invention to be as follows:-
My invention relates to an improved system of "registration
"in organs and to
the means by which such system is carried into practice, the object being to render
the action easy and perfectly natural to the hands of the performer, and thereby
capable of rapid transition.
The means by which I carry out my invention is as follows: connected at their
back ends with the stop valves, are a set of keys preferably black, and pivotted
somewhere between their ends, which when pressed down, shut off or negative
the registration.
A little above these black (or negative) keys, are a set of shorter white (or
positive) keys, pivotted at their back ends, and between each white key and the
black key under it, I place a short sticker, resting upon the black key and
supporting the white one, the sticker being located somewhere between the pivot
of each key.
When a white or positive key is pressed down by the performer, it transmits its
motion through the sticker to the black or negative key at the back of its pivot, and
raises the front end to meet that of the depressed white key, and at the same
time operating the stop valve.
When the black key is pressed down it closes the stop valve, raises the white
key, and shuts off or negatives the registration.
Dated the 2nd day of Santambar 1907
ROBT. F. DRURY, C.P.A.,
Agent for Applicant, Bank Buildings, George Street, Sheffield.
I, CHARLES FREDERICK BRINDLEY, of Suffolk Road, City of Sheffield, Organ Builder,
do hereby declare the nature of this invention and in what manner the same has
to be performed, to be particularly described and ascertained in and by the
following statement :-
My invention relates to an improved system of "registration" in organs, and to
the means by which such system is carried into practice, the object being to render
the action easy and perfectly natural to the hands of the performer, and thereby
capable of rapid transition.

page_text: The means or mechanism by which I carry out my invention are as follows: and
are illustrated in the sheet of drawings annexed.
Fig. 1 illustrates a method of carrying out my invention when applied to the
sides of the finger board.
Fig. 2 represents a modification, as when applied over the row of keys.
I arrange a set of keys B, which are preferably black, which are connected at
their back ends marked V, with the pneumatic stopvalves not shown in the drawing,
as they form no part of the invention. These keys are pivotted in a suitable
position between their ends which is marked P, and when these black keys are
pressed down by the organist they shut off or negative the registration.
At a little distance above the black keys (or negatives) are arranged a set
of white keys W, (or positives) which are pivotted at their back ends, at P2,
and between each of the upper and lower keys, I place a short "sticker" S,
which rests upon the key B, and supports the key W, it is secured by the wire
and nuts N; it is situated somewhere between the pivot of each key.
When the front end of a white or positive key W, is pressed down by the
performer, its motion is transmitted through the sticker S, to the black or
negative key B, beyond the pivot P, causing its front end to rise, and meet
the front end of the depressed key W, and operating the stop valve connected
at V.
Similarly when the black key B, is pressed down, it closes the stop valve by
raising the white key W, shutting off or closing the registration.
In some cases such as when it is desirable to place these keys in a more
contracted position, say over keyboard, I use the modification shown in Fig. 2, in
which I show the black keys B, placed over the white keys W, and I modify the
construction of the sticker S, so as to occupy less room.
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 :-
1. As an improved system of registration in organs, the arrangement of keys B
& W, with their pivots and stickers, as herein before described and shown.
2. In mechanism for registration in organs, the arrangement of an upper and
lower key, so pivotted and connected that when the front end of the upper key is
pressed down the front end of the lower key is raised, and when the front end of
the lower key is depressed the front end of the upper key is raised, as herein before
described and set forth.