AN IMPROVED ORGAN
Year: 1876

page_text: LETTERS PATENT to Charles Edward Herbert, of Charlton, in the County of
Surrey, Telegraph Engineer, for the Invention of "AN IMPROVED ORGAN."
PROVISIONAL SPECIFICATION left by the said Charles Edward Herbert at
the Office of the Commissioners of Patents on the 24th May 1876.
CHARLES EDWARD HERBERT, of Charlton, in the County of Surrey, Telograph
Engineer. "AN IMPROVED ORGAN."
g
I construct an organ with one "manual" and one "sound board" (having any
desired number of "slides " registers "), and with "pedals" in the usual
manner, and I add to and combine therewith a novel arrangement of pipes and
mechanism, in conjunction with which, and with the ordinary portion of the instru-
ment, I use a novel arrangement of pedals and mechanism for working the slides
(either with or without the usual "draw-stop action"), and for causing in some
cases certain slides to control the movements of a certain other slide, thereby giving
to my improved instrument capabilities ordinarily possessed only by those having
more than one manual.
In order that this my Invention may be clearly understood I will first describe
the arrangement of pipes and mechanism above referred to, calling it, for the sake
of distinction, my "solo organ," and referring to the ordinary portions of the
instrument as the "great organ." The additional pipes which I use for this purpose
constitute a stop of sixteen feet pitch, but extending only through the two highest
octaves of the manual. They are supplied with wind from the "grooves" of the
great organ sound board, and governed by a slide in the usual way, which is however
divided into two or three parts. In any case the upper part, which may be called
the upper slide, may be worked by any of the means herein-after described or
referred to. The lower part or lower slide (taking first the case of two parts only)
is worked by the contrivance known as the "pneumatic lever," connected to it by
suitable mechanical means, so that the inflation of the pneumatic lever closes it, a
spring opening it when the lever is not inflated.
The valves of the pneumatic lever are connected with the action above referred
to, which works the upper slide so that the closing of the latter causes the closing
of the lower slide also, but the valves can independently of this be worked by
other means, viz., a very slight depression of any one of the manual keys relating

page_text: to the upper slide, or the depression of an additional key, or of one of several
additional keys placed adjacent to the manual, acting through suitable inechanisın
connecting them with the said valves. This mechanism is, however, arranged so that
by a suitable mechanical contrivance it can be disconnected, the movement being
effected preferably either by a pedal similar to the ordinary swell pedal, or by a
small key placed over the manual and working in a similar manner. When the
slide of this additional sixteen feet stop is opened and a solo played an octave
higher than written (within the compass of this stop) the sounds will be those of
an eight feet stop (derived from the additional stop) with those of four feet, two
feet, or other stops in combination with it (derived from the eight feet, four feet, or 1
other stops of the great organ) while any accompaniment may be played as written
on the lower portion of the manual, extending from the lowest note to that next
below the commencement of the additional stop for the time being, as determined
by the action of the pneumatic apparatus.
In case the slide of the additional stop is divided into three parts, called upper, 1
middle, and lower slides, two sets of pneumatic apparatus are provided, one causing
the keys relating to the middle slide to act so as to close the lower slide, and the
other causing the keys relating to the upper slide to close the middle slide, this
second set of pneumatic apparatus however being made to act upon the first, so
that the movement of a key relating to the upper slide results in the closing of
both lower and middle slides. In this case the additional key or keys may be
arranged to act on the second set of pneumatic apparatus, or may be provided for
each sct.
The action for working the upper slide, as well as that for disconnecting the
valves from the keys, are of course made to act upon both sets of pneumatic
apparatus, or the latter action may be dispensed with altogether, and instead of it
a small "ventil" or "pallet" (similar to those used for supplying the "Bourdon"
pedal pipes with wind) placed in the channel which supplies the two pneumatic
levers may be used, in which case it is necessary to modify the arrangement of
slides, the upper slide being extended into a complete slide and the connection of
its action with the pneumatic levers omitted, and the middle and lower slides being
placed upon the said upper slide. The action of this arrangement of "solo organ
will be readily understood from what has been above stated.
In some cases I use two additional stops, such as herein-before described, each
having a complete slide, while the lower or middle and lower slides act upon both.
Instead of using mechanisin to cause certain parts to act upon the valves of the
pneumatic lever, as herein-before described, I in some cases cause these parts to
send a current through an electro-magnet (by the means used in electric organs for
that purpose) the armature of which magnet is connected to the valves of the
pneumatic lever. It will be seen that these novel arrangements may also be
applied to "reed organs" or harmoniums and instruments of a like kind.
"
I also apply in conjunction with the novel parts described, as well as in connection
with the great organ, the novel arrangements of mechanism for working and (as it
may be termed) coupling "the slides now to be for the sake of clearness
separately described. A rocking lever is connected with each slide and also by a
vibrating rod to another lever, which is connected to a pedal either by the ordinary
means used used for such purposes or by a peculiar arrangement of a cord passing over
and around rollers, so that the depression of the pedal causes the vibrating rod to
act upon the rocking lever and move the slide, but on the release of the pedal the
latter and the connecting mechanism return to their normal position while the
vibrating rod prepares to engage with the other end of the rocking lever, so that
the next depression of the pedal will return the slide to its first position, and so on.
To prevent noise in the working I sometimes employ stops of india-rubber to
limit the movements of the slides, and use that material also in the form of pads
or otherwise in other parts of the mechanism. In order that the slides may work
with a moderate and unvarying amount of friction, I fit them easily and affix
springs to press them with a definite pressure against the "upper boards,”

page_text: When the ordinary draw stop action is dispensed with I place over the slots
in which the pedals work labels bearing the names of the stops, and if any
slides do not sufficiently indicate their position by the influence of such position
on the tone of the instrument I provide small indicators to supply the required
information.
In case several treble slides have one bass slide in common I couple them by
pins and notches or catches, so disposed that the opening of any one or more of
the former opens also the latter, but if all the former are closed the latter also is
closed by a spring.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Charles Edward Herbert in the Great Senl Patent Office on the
23rd November 1876.
CHARLES EDWARD HERBERT, of Charlton, in the County of Kent, Telegraph
Engineer. "AN IMPROVED ORGAN."
My Invention of "An Improved Organ" consists in the combinations of parts
herein-after described. I construct an organ with one manual and one sound board
(having any desired number of slides or registers), and with pedals, in the usual
manner, and I add to and combine therewith a novel arrangement of pipes and
mechanism, in conjunction with which, and with the ordinary portion of the instru-
ment I use a novel arrangement of pedals and mechanism for working the slides
(either with or without the usual draw stop action), and for causing in some cases
certain slides to control the movements of a certain other slide, thereby giving to
my instrument capabilities ordinarily possessed only by those having more than one
manual.
In order that this my Invention may be clearly understood I will first describe
the arrangement of pipes and mechanism, calling it, for the sake of distinction, my
"solo organ," and referring to the ordinary portion of the instrument as the "great
organ." The additional pipes which I use for this purpose constitute a stop of sixteen
feet pitch, and of a power and quality of tone suitable to combine with the stops of
the great organ, in the manner crein-after described, but of a compass of two
octaves only, or thereabouts, at the highest part of the manual. I will take, for
example, the case of a great organ having open and stopped diapasons, treble, tenor,
F to G (thirty-nine notes), stopped diapason, bass C, C, to tenor E, and principal
through, a suitable "solo organ stop "for which would be sixteen feet Keraulo-
phon middle G to G (twenty-four notes). This additional stop I place either
on the (great organ) sound board, in the usual way, or, by preference, on a small
auxiliary sound board attached to it, in such a manner that the additional pipes still
obtain their wind from its grooves (see Figures 1 and 2), and they are governed by
a slide A, A, formed in the usual way, but directed into two or three equal or nearly
equal parts. In the present example I have divided it into two parts, which I shall
call the upper and lower slides, having respectively fourteen holes. In any case
the upper slide A³ may be worked by any of the means herein-after described
or mentioned, connected to it at its upper end. The lower slide A is worked by the
contrivance known in organ work as the pneumatic lever (which may be placed in
any convenient position), connected to it by a suitable arrangement of stickers,
trackers, backfalls, squares, rollers, or other contrivances familiar in organ building
(and bereafter spoken of generally as "tracker work"), at its lower end a in
such a manner that when the pneumatic lever is inflated the slide is closed, as
shewn in Fig. 1. A spring is also attached to it at b (or to some convenient part of
the connecting "tracker work"), so as to open the slide A whenever the pneumatic
lever is not inflated.
The valves of the pneumatic lever are connected by suitable tracker work with

page_text: some part of the action which works the upper slide, in such a way that when it is
closed the valves are moved so as to inflate the pneumatic lever and close the lower
slide also; but this connection is at the same time arranged so as to permit the
valves to be moved by other independent means, herein-after described. To make
this point quite clear I have shewn in Fig. 1 a lever B to work the upper slide, 5
which when moved (by means already referred to) in the direction of the arrow
closes it, and at the same time pushes the tracker C and works the valves;
when, however, the valves are to be worked by other incans the tracker can move
without the lever. A small spring is provided, if necessary, to return the tracker
when released.
Adjacent to those keys which relate to the upper slide (that is, which govern the
pallets opening to the grooves from which the pipes placed on the upper slide take
their wind), or to some convenient part of their action (in the present case adjacent
to the pull-down ends of the backfalls), I place a small rocking frame in such a way
that it will be rocked on any one (or more) of the fourteen keys being depressed by
pins or catches placed on them or the parts of their action referred to, as the case
may be. This arrangement is shewn in Figures 1 and 2, D, E, E, F, being the
rocking frame, rocking in fixed supports at d, d, whenever by the depression of a
key one of the pins G, G, fixed to the ends of the backfalls H, H, presses on the rod
F, which passes through and is carried by the arms E, E.
"
It should be understood that when the touch of the instrument is brought up or
adjusted the keys relating to the "solo organ are adjusted to a somewhat shal-
lower touch than the others, but are, nevertheless, made to rise a little higher against
a fixed bar (as U) by small leaden weights attached to them, or (as in the present
case) to their back falls for the purpose, and the pins G, G, are then adjusted (by
bending), so that they all exactly touch the rod F when the rocking fraine is in its
normal position. The slight depression of the keys before acting upon the pallets,
resulting from the arrangement just described, and which I call the "free touch," is
for the purpose of working the pneumatic lever, as herein-after described, without
or before producing any sound, and, as will be seen, does not appreciably affect the
(actual) touch of the instrument. There is also provided near the upper end of the
manual, cither above the keys or below them, a small key I working on a pin i,
which I call the "rest key," connected by tracker work, with an arm J on the
rocking frame, so that the depression of it will have the samo effect as the "free
touch of a inanual key. I sometimes provide a "rest key," both above and below
the manual keys, in which case they are connected, as shewn. Or I use one only, so
forined and placed as conveniently to be worked by the foot; and I prefer to con-
struct it as shewn at A, B, Figures 9 and 10, and to arrange it to work on centres
C, C, adjacent to the foot blower or the swell pedal, shewn at D, if the organ is pro-
vided with either of those accessories; so that one foot inay conveniently and
simultaneously operate both "rest key" and foot blower or swell pedal, as the case
may be.
The movement of the rocking frame D, E, E, F, acts through the arm e, and the
spring K by the tracker L, the square M, and pin N, on the tracker C, before
referred to (or by other suitable tracker work), so as to inflate the pneumatic lever
with the effect already pointed out, the parts being however so proportioned that
the amount of moving given to the rocking frame by the "free touch" of the
keys is sufficient to work the valves and inflate the pneumatic lever, the rest of the
movement being taken up by the spring K, which is thereby compressed, although
it is sufficiently strong first to move the valves without being so compressed.
The square M (or its equivalent) is centred on, for example, a lever O, which is
moveable on a fixed centre P, but is usually retained in its position against a stop Q
by a spring R. When it is desired to put the pneumatic apparatus (as far as the
manual keys are concerned) out of action this lever is moved (as shewn in dots) ;
the movement being effected preferably by the depression of either a small key
similarly placed to the "rest key" or a pedal, such key or pedal working in a
notched slot, in precisely the manner of the swell pedal in common use.

page_text: The action and effect of the "solo organ" thus described are as follow:-So long
as the upper slide of the keraulophon remains closed the lower slide, by the action
of the pneumatic lever, also reinaius closed. But when, by the means already
referred to, the upper slide is opened the pneumatic lever ceases to act, and the
lower slide is alsoopened by the spring. If now any solo containing only the large
black notes of Figure 7 (or any of them) be played on the manual keys represented
by the small black notes the sounds given will be those of an eight feet keraulophon.
Let now a stop of the great organ be drawn, for example, the open diapason, and
the same solo being played (in the same manner as before) the sounds will be eight
feet koraulophom and principal. Further, while the solo lies within the compass of
the large crotchets any accompaniment extending from the breve to the semi-breves
may be played with it, the sounds being open diapason, but whenever the solo
employs the large quavers the accompaniment may be extended as high as the
minims, for so long as any one of the fourteen highest keys of the manual (the
small quavers) is depressed to the depth of its "free touch," or so long as the "rest
key" is used the lower slide (governing the keraulophon pipes giving the large
crotchets) is closed by the action of the pneumatic lever worked by the movement
of the rocking frame.
When the pneumatic lever is put out of action (as already described) the effect is
to afford two independent manuals, one having a compass from the breve to the
semi-breves, with open diapason, and the other a compass, represented by the large
black notes, with keraulophon and principal.
By drawing various combinations of stops on the great organ various and different
combinations are produced on the "solo organ," as set forth under Figure 3, and it
will be understood that this is taken into consideration in choosing and voicing the
stops both of the great and "solo" organs.
I sometimes apply an additional slide to one (or more) of the stops of the great
organ, for the purpose of closing the two highest octaves or thereabouts of such
stop independently of its ordinary slide, and thus further varying the combinations
of the "solo organ;" this additional slide I work between the upper board and a
secondary upper board by any of the means herein described or îmentioned; or I
enclose such stop in a box, such as hercin-after described in reference to the "solo
organ stop."
In case the slide of the "solo organ" is divided into three parts (see Figures 3
and 4), which I call the upper, middle, and lower slides, the keys relating to the
middle slide A are caused (by a rocking frame D, E, E, F, pneumatic lover, and
other parts, as before described) to act upon the lower slide A at a, while the keys
relating to the upper slide A² (modified in the Figure, as herein-after to be explained)
act (by a second rocking frame D', E', E, F, pneumatic lever, and other parts)
upon the middle slide A¹ at a¹. A "rest key" is connected to each rocking frame,
as already described, or only one may be used, connected to the second rocking
frame, the rod F¹ of which is formed at the end so as to overlap and press upon the
end of the rod F of the first rocking frame, so that whenever the second frame is
rocked the first is similarly rocked. The action for working the upper slide, as well
as that for disconnecting the valves from the keys, are of course made to act upon
both sets of pneumatic apparatus; or the latter action may be dispensed with
altogether, and instead of it a small ventil or pallet (similar to those used for
supplying the Bourdon pedal pipes with wind) placed in the channel which supplies
the two levers may be used; in which case it is necessary to modify the arrange-
ment of slides as shewn, the upper slide being extended into a complete slide and the
connection of its action with the pneumatic levers omitted, and the middle and
lower slides being placed upon it. It may be not unnecessary to explain that the
middle slide A¹ is made wider than the lower one A, and has a narrow strip or
prolongation extending on each side of this latter, with a bridge piece a¹ beyond
the end of the upper board, to afford a convenient point of connection for the
pneumatic lever.
The action of this arrangement of "solo organ" will be understood from what

page_text: has already been explained with reference to the first arrangement, and the improved
effect with the aid of Figure 8.
It is necessary to add that the success of the "solo organ" depends in a great
measure upon the choice of a suitable character and power of tone for the sixteen
feet pipes, so that they may supply a sufficient element of sixteen feet tone for the
louder combinations without being too loud for the softest, and that they may be
suitable to be used with the great organ stops in the way shown, and at the same
time make the solo combinations thus produced contrast agreeably with their
corresponding accompaniment combinations of great organ stops only.
In order to the perfect fulfilment of these requirements when the great, organ has
more than from two to four stops, or when considerable variety of solo combinations
is desired, I provide the "solo organ" with two stops, such as already described, but
(preferably) unequal in power and different in tone. They may also differ slightly
in compass; in this case I prefer to arrange the mechanism as last described (see
Figures 3 and 4), but with the differences that two complete slides are used, each
provided with means of working, and that the middle and lower slides A, A', are
inade wider and with each two sets of holes to act on both stops simultaneously
(see Figure 5). Or I use one stop only, and unclose it in a swell box constructed
with louvres in the usual manner, or with a lid or door to open and close by a pedal
or other convenient means.
Instead of employing mechanism to cause certain keys and other parts to work
the valves of the pneumatic lever (or levers) as herein-before described, I sometimes
use for this purpose the electrical apparatus shewn in Figure 6; A is an electro-
magnet constructed in the usual manner, whose armature B working on a pin at b,
is attached at c to the tracker C (or other "tracker work") before referred to in
such a manner that when the current from an electrical battery is caused to pass
through the coils of the magnet, by the movement of any of the parts already
described as connected to the valves of the pneumatic lever, the armature is
attracted against the stop a and the valves are moved.
The battery as also the insulated wires, contacts, and other parts, I construct and
arrange in the manner usually adopted in electric organs, or in other suitable
known manner, but so that the manual keys make their contacts when they are
depressed to the depth of their "free touch."
I desire it to be understood that excepting the "rest keys," I do not claim novelty
for the individual parts and mechanical or other contrivances used in this "solo
organ," also that I do not limit myself to any exact compass for it, or points of
division for its slide (or slides), or to the particular arrangements of its several
features herein-before described, as many modifications thereof may be made without
deviating from the novel principle of my Invention, which is to add to an instrument
having one manual and not divided into separate organs or portions capable of
being separately operated, pipes of sixteen feet pitch and of a similar power and
character of tone as compared with the ordinary stops of the instrument, in con-
nection with a particular portion of the compass of the manual so that on such
portion music will be played an octave higher than written, and to cause such
portion to vary in extent as may be required, that is, under certain circumstances to
be curtailed by a certain group or groups of notes, thus providing in effect a manual
of sufficient compass for playing accompaniments sounding on ordinary stops of the
instrument only, and also an independent manual of sufficient compass on which
solos may simultaneously be played, sounding by the effect of the added sixteen feet
tone on different and more powerful combinations of stops. But I claim as novel
the system of adjustment of certain parts which causes the silencing of pipes by
certain keys as herein-before described to take place without or before the opening
of their pallets.
It will be understood that these novel arrangements may be applied also to reed
organs (harmoniums and instruments of a like kind), using instead of the special
stop (or stops) of pipes a stop (or stops) of reeds (vibrators), placed in a reed pan
divided into two or three compartments (and supplied with wind by separate

page_text: valves) in the usual manner, but corresponding in compass with the divisions (upper
and lower or upper middle and lower) of the slide (or slides) herein-before described,
the valves admitting wind to these compartments being controlled and worked by
pneumatic and other apparatus precisely similar in construction and operation to
that already described as connected with the said slides.
From the foregoing description it will be seen that my improved instrument
possesses considerable facilities for solo playing, lacking however, so far as described
for this as well as other purposes, the facilities for readily changing the tone and
loudness of the instrument derived from the use of two manuals. "I therefore apply
in conjunction with the novel parts described as well as in connection with the
great organ, the novel arrangements of mechanism for working and (as it may be
termed) coupling the slides now to be (for the sake of clearness separately)
described.
The arrangement of pedals and mechanism for working the slides which I call
my "commutation pedal action" is shewn in Figures 11, 12, 13, and 14.
A cam
or rocking lever A, turning on a fixed centre at B, is placed opposite the end of
each slide C. This cam moves the slide by means of the stud D, formed as shewn,
and has attached to its under side the brass wire E, which is curved to a radius
somewhat greater than the length of the rod F. On the wire E runs the roller G
working in a slot formed in the end of the rod F, the lower end of which is fitted
into a slot in the end of the lever H, and works on the pin / fixed in the lever,
which itself turns on the centre I. To prevent friction against the wire E the slot
in the rod F and its lower end are inade of the forins shewn in Figures 13 and 12,
the hole which receives the pin h being a little larger than the said pin and the
sides of the slot in the lever H parallel. The centres B and I I make by preference
of iron rods passing through all the cains or levers, and supported at intervals ou
brackets fixed either to the sound board or to a bar J carried on some convenient
part of the organ framing, the ends of the slides being guided between this bar and
a smaller one j. The ends i of the levers H are each connected to a "commutation
pedal" by a gut line or cord of some inelastic material, the ends of which are
looped and provided with small thimbles & working on the pins i, i. These cords
are passed round cylindrical rollers K, K, placed as may be necessary, and turning
on fixed pins. Each cord is attached to each roller at two points m, m, a little
apart as regards the width of the roller by glueing, or by a small clip of iron or of
hard wood secured by a screw, or by other suitable micans; this prevents the parts
of the cord from rubbing against the roller or against each other while permitting
them to wind and unwind as may be necessary. The length of the cord is adjusted
by inserting small pieces of wood in a knot tied in some free part of it, as at M;
or, in some cases, I connect the lever H to the pedals by suitable "tracker work."
To prevent noise in the working I sometimes cover the periphery of the roller G
with india-rubber, or form it entirely of that material. I also affix hollow cushions
of the same material (formed of tubing or otherwise) to the cams A or other parts
of the mechanism where practicable and desirable, as at e, e, g, a, a, which latter
also serve to limit the movements of the slide (instead of the usual pins), but in
order more accurately to limit the opening movement I add a solid cushion in some
position (as at c) where it will act directly upon the slide (see also Figures 1 and 3).
The action is as follows:-The depression of the pedal causes the rod F to rise,
and its upper end engaging in one of the hollows f. f, of the cam A rocks the latter
on its centre B and moves the slide. On the release of the pedal the rod F
(weighted if necessary) drops out of the hollow of the cam, and the roller G
descending the incline presented by the wire E the pedal returns to its normal
position. The next depression of the pedal will cause the rod F to engage in the
other hollow of the cam and will restore the slide to its former position, and so on.
I do not claim, however, to produce for the first time an alternate or reversing
movement from a repeated movement.
To guard as far as possible against the common fault of the slides becoming too
tight or too loose, especially as a moderate amount of friction is necessary to the

page_text: accurate working of the mechanism just described, I fit the slide as freely as is
consistent with security against running, and attach a spring to it at N and to a
fixed point above, of a strength just sufficient to produce the necessary friction. Or
I place a bar as j across and supported only by the slides, to which I attach springs
of any convenient form, as O, so as to produce a similar effect.
In cases where the ordinary draw-stop action is retained I connect it to the slides
beyond the cams, or between them and the sound board, as shewn in dots, or at the
other end of the sound board, or I connect it to the cams at n or n¹, as shewn in
dots, as may be convenient.
When the ordinary draw-stop action is omitted or connected to the cams A, or
placed at the other end of the sound-board, as above mentioned, I sometimes
dispense with the guides J, j, and interpose a link P (Figure 14) between the cam
and the slide, one end of it being placed in a slot cut in the end of the slide, to
which it is connected by a pin o, and the other end having a slot to receive the
stud D, which in this case is perforated to receive the pin & fixed in the link.
Also when the ordinary draw-stop action is dispensed with, I find that some
slides do not sufficiently indicate their position by the influence of such position on
the tone of the instrument. In such cases I provide an indicator consisting pre-
ferably of a small rod S attached to and pushed outwards by a light spring T (sec
Figure 1) through the rail over the manual (where the ordinary draw knobs are
sometimes placed) when the slide is open, and drawn in when the slide is closed
by a light cord attached to some convenient moving part of the mechanism before
described, and passed over small rollers in a similar manner to the cords connected
with the commutation pedals."
"
Also, when the ordinary action is dispensed with, I place over the slots in which
the "commutation pedals" work labels of any suitable material having the names
of the stops clearly indicated upon them.
The "slide coupler" is an arrangement which I use when two stops in the upper
part of the organ have one stop in the bass part common to them both, while
another (or others) runs through, as, for example, in the great organ before instanced.
In Figure 15 are shown the forms and arrangement of slides usually adopted in
such a case, A and A' being the slides of the treble stops, and B that of the bass
stop, the usual draw-stop actions being attached at a, a, and b. I usually provide
however means of working (as herein-before described) for the treble slides only,
the movements of the bass slide being rendered automatic by the "coupler."
(Sometimes however I provide means of working for this slide also; for example,
if a combination such as 7, Fig. 3, is required). For this purpose I attach to the
bass slide a spring C capable of closing it, and I fix in some convenient part of the
treble slides pins D, D', which engage in notches cut in the bass slide, and situated
relatively to the pins, as shewn. If now one of the treble slides A be drawn, the
pin D pressing against the side d of the notch c, d, (provided with an india-rubber
cushion) will draw the bass slide also, while the width of the notch c, d, will
prevent any action upon the pin D¹. A similar effect takes place when the other
treble slide A' is drawn, and consequently so long as either or both of the treble
slides is open the bass slide also is open, but whenever both are closed the bass is
closed by the spring C.
It will be understood that by these or precisely similar means any numbor of
treble slides may be coupled to a bass slide common to them all; for example,
the slide E (if it were only a treble slide) might also be coupled to B, as shown
in dots.
It is to be understood that the forms and details of construction and arrangement
of the various parts herein-before described are open to modification according to
circumstances, in common with most parts of organ construction.
Having thus described and ascertained the nature of the said Invention, and in
what manner the saine is to be performed, I would remark that I do not claim as
of my Invention any of the parts herein-before described, which are well known,
but to which I have found it necessary to refer in order to explain my said Inven-

page_text: tion, but I hereby declare that what I claim as of iny Invention is, the combination
of parts or contrivances herein-before called the "solo organ," the "rost key," the
system of adjustment of certain parts which causes the silencing of pipes by certain
keys to take place without or before the opening of their pallets, and, with the
reservation herein-before inentioned, the arrangements of pedals and mechanism for
working and "coupling" the slides, as herein-before described.
In witness whereof, I, the said Charles Edward Herbert, have hereunto set
my hand and seal, the Twenty-second day of November, in the year of our
Lord One thousand eight hundred and seventy-six.
Witness,
WILLIAM SPENCE,
8, Quality Court,
Chancery Lane.
CHAS. E. HERBERT. (L.S.)