An Improved Device for Turning the Leaves of Music.
Year: 1888

page_text: Date of Application, 4th Apr., 1883
Complete Specification Left, 4th Jan., 1889
Complete Specification Accepted, 4th Apr., 1889
PROVISIONAL SPECIFICATION.
An Improved Device for Turning the Leaves of Music.
I, ERWIN VON TRAUTVETTER of 42 Zeughausmarkt, Hamburg, in the Empire of
Germany, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
The apparatus consists of a stand or frame attached in any suitable manner to the
instrument or to the music stand, the arms carrying the mechanism proper being
Between the two arms
adjustable according to the height of the leaves of music.
revolves the catcher arm serving to turn the leaves. At the extremity of the lower
stationary arm is arranged a casing closed by a rubber plate and connected through a
pipe or hose with bellows placed near the pedal. The bellows are actuated by the foot
of the player. The hose has a mouthpiece suspended from the axle of a small two-
wheeled carriage running in a forked guide. The said rubber plate has a pin connected
by a two armed lever with the carriage.
When at rest, the air in the hose and bellows has a normal tension, as soon however
as the bellows are blown, the air is rarefied, and the music leaf next to the month
piece is drawn back and subsequently the rubber plate is drawn inwardly. Thereby
the mouthpiece is so far moved forward with the leaf of music as to allow the catcher
to seize the sheet and to turn it over.
HERBERT & Co.,
Agents to Applicant.

page_text: I ERWIN VON TRAUTVETTER of 42 Zeughausmarkt, Hamburg in the Empire of
Germany, 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 consists in certain improvements in devices for turning over the
leaves of music, and its object is to provide a device simple and easy to be fixed, one
in which the edges of the sheets need not be fixed or adjusted as in those devices here-
tofore in use, and one therefore in which the number of leaves which may be turned
over is not limited by the capacity for holding the leaves as heretofore.
Further objects are to dispense altogether with any manual movement to operate the
device and to substitute a pedal movement; and to construct the device so as to enable
leaves to be turned back again if desired for instance for repeating passages of the
music.
The accompanying drawings illustrate a method of carrying the invention into
effect.
Fig. 1 is the right hand half of the device attached to a music stand, in vertical
longitudinal section, Fig. 2 is an end elevation thereof with end plate, expanding
bellows and cap removed showing certain parts of the mechanism drawn cross-hatched
or shaded to distinguish such parts more readily from others. Fig. 3 is a horizontal
section of the said device showing the mechanism in the same position as in Fig. 1.
Fig. 4 is an end elevation of the mechanism similar to Fig. 2, the mechanism being
however shown in a different position. Fig. 5 is a plan view on a reduced scale of
the whole device showing also the bellows for operating it in elevation (one partially
in section). Fig. 6 is an elevation illustrating, as an example, the attachment of the
improved music leaf-turner to a "cottage," or upright, piano.
The principal parts of the improved mechanism are, first a block which is moved
onto the face of the leaf of music near to the outer part thereof or at such distance
from the hinge as shall enable it to act in the manner desired-Such block being
pressed as aforesaid onto the face of the uppermost leaf of music is thereupon held
pressed thereon and is given an end wise movement towards the hinge or binding of
the music, so that the leaf carried along by the block is looped out as shown in Fig. 5
-Secondly a hook, bar or the like adapted to be moved up into the loop so formed and
thereafter to be moved in a circular or equivalent manner so as to carry over said loop
(the block having become released) and so turn the music, and thirdly expanding
bellows to operate the mechanism giving the above said movements to the block and
turn over bar, together with pedal bellows or compressors connected by pipes to the
expanding bellows.
The left half of the device is symmetrical with the right half.
In carrying the invention into effect I construct a cylindrical case of suitablo
length to contain the mechanism and provide on the under side of the same spring
clamps K by which the said case may be fastened to the shelf of the usual music stand.
In the case C is fixed such framing p as may be necessary for supporting the mechanism.
To the ends of the case are respectively attached expanding bellows 6 and the
nozzles M are attached to the ends so that the said bellows may respectively be placed
in communication with pedal air compressors or bellows BB in suitable position to be
operated by the foot of the player. The inner ends of the bellows bb are respectively
attached to plates carrying rods T in connection with a sliding carriage S guided in

page_text: shears g, so that the expanding and contracting of the bellows give a recipr
endwise movement to said carriage S. The rod T carries a downwardly extended
arm on which revolves an angle lever a and to the lower end of said arm z is
fastened a bar U parallel to the rod T and carrying on a laterally extended gudgeon an
angle lever e. The end of the bar U forms a wrist pin or gudgeon for the cam n-
The latter is provided with two slots as in Figs. 2 and 4 into one of which one of the
ends of the lever e engages-The cam carries a projection which on revolution or partial
revolution of the cam abuts against and deflects the two armed lever f the outer arm of
which hooks under a nose on the shaft or shank carrying the block so as to swing said block
upward from the position of rest in Fig. 2 against the music sheet which is supported
on or against the frame R attached to the top of the case C. The shank of the block D
revolves on a gudgeon carried on a frame a fixed to the carriage S. Through the wall
Of these the former engages
of the case are screwed two adjusting pins c, and c₁.
in a recess in the angle lever e-When the bellows b are expanded the rod T moves
lengthwise and consequently the fulcrum or pivot of the lever e is displaced in a
direction parallel thereto, one end of said lever being however retained by the pin c1,
the lever is rocked on its pivot and the other end vibrates the cam n causing the pro-
jection thereon to strike the arm of the lever fand so throw up the block D onto the
face of the music sheet. The devices necessary to this movement are shown cross-
hatched in Figs. 2 and 4. To hold the block upon the music sheet during the move-
ment of the block for looping the sheet, the second slot in the cam n is provided and
the lever k¹ engages therein. The slot is of such shape that the first part of the move-
when
ment of the cam necessary to throw up the block D has no effect on said lever k¹,
however the block D has been thrown up as aforesaid, the further movement of the
cam n will cause the end of the lever k¹ to be struck and moved by the end of the slot,
and the said lever will be vibrated to cause its upper hooked end to move back onto
the boss of the lever carrying the block D and so catch over a projection k² on
said block and lock the same in place-Since however further passage of those
movable parts under pressure of the bellows b, the lee will be carried beyond
the pin and therefore out of influence of said pin, it is necessary to provide a
locking device for the lever k¹ to prevent the same from falling off under influence
of its weight-This is effected by the lever k, cam lever a and stationary pin c¹¹.
As the whole mechanism moves along as aforesaid the pin c¹¹ arrives on the
curved part of the lever a and deflects said lever and therefore the locking lever k
causing the latter to hook onto the end of the lever k¹ and hold up the same so
long as the lever a is so deflected by the pin c-The block D is thus held on the
music sheet and the latter looped until the rod G is placed in the loop as herein-
after described; at this moment the pin c will slide off the curved part of the
lever a and the lever k will be free to fall back by its weight; consequently also
the lever and the parts connected therewith namely the cam n and lever e also
to fall back to their original position under influence of the weight of the lever k¹
-The block D thus left free and supported likewise falls by is weight, through
the slot and leaves the sheet free-The moving mechanism when returning after
having moved over the sheet as hereinafter described will arrive again in the
position shown in Figs. 1 and 3. The lever a will on the return journey be also
inet and deflected by the pin c" and the hook k will be vibrated and will catch
up and lift the lover ¹ just sufficiently to move the parts n and e so that the
pin c can arrive within the forked end of the lever e. Although on this return
movement of the parts the cam n may tend to strike up the lever of block D, the
latter not being opposite the slot i or at the time will only strike the interior
of the case and rebound, eventually falling into its first position when the parts
arrive in their position of rest-The block D is faced with rubber or other rough
material.
The method in which the bar G is operated is as follows; In or about at the
centre of the case is pivoted or journalled the rocking shaft w carrying on a radial
arin a bar G pivoted to said arm. A lever N of suitable form is likewise pivoted
to said arm and on the carriage S is a projecting pin S¹ adapted to engage with

page_text: or strike one arm of the said lever N so as to rock the same on its pivot and
cause the other arm thereof to lift the arm G and cause it to project upward into
the loop formed as aforesaid by the music sheet, this movement having been
effected, the further motion of the carriage S will cause the rack S' (which may
be shaped as shown simply for lightness of weight) on the end thereof to engage
with the radial ribs or teeth on the shaft w and rock said shaft-The bar G
is by this means moved round in an arc of a circle about the shaft to, moving in
a snitable slot in the case being supported by the lever N beneath it-On arriving
at the end of the slot the lever N is knocked over by a stationary pin suitable
fixed in the case and the rod G falls-Before the return movement the rod G is.
again knocked up by the action of said stationary pin on the lever N and traverses
the slot, this time however in front of the music sheet which was not looped, and
eventually falls back into its original position through the right hand extension of the
slot. Or the rod G may be supported by the walls of the slot and upon arriving at
the end of the slot being no longer supported by said slot, fall into the case and return
within the latter, the case being shaped to allow of such movement. On releasing the
bellows B from the pressure of the foot the apparatus returns therefore to its previous
position, the rack S moving back the shaft w, arm G, etc.
I do not confine myself to the exact form or construction herein described since it
is obvious that I may use a case other than of cylindrical form, also that the spring
clamps K may be replaced by other forms of attachment or by permanent supports
without departing from my invention; therefore,
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 ;-
In music leaf turning mechanism
1. The combination with mechanism for turning music leaves, of pedal air com-
pressors or bellows connected to said mechanism for operation thereof.
2. A block or finger adapted to be moved onto the face of the music sheet and to
be thereafter moved and to carry said music sheet in said movement so as to loop the
same.
3. The combination with means for looping a music sheet in the manner described,
of a bar adapted to be raised into said loop and to be thereafter moved for the turning
over of said sheet.
4. The combination with a shaft bearing on a radial arm, a pivoted bar G for the
purpose set forth; of a cam for lifting said bar, and slide carriage S for operating said
cam and revolving said shaft and a case having slots for the passage and support of
said bar.
5. A longitudinal case with rest R thereon, and having in its ends expanding
bellows, a vibrating hammer block D and mechanism for throwing out and fixing
said hammer block, in combination with stationary abutments in said case for operating
said mechanism and pedal bellows or compressors in communication with said
expanding bellows for the purpose set forth.
6. The mechanism for operating the hammer block D substantially as hereinbefore
described and illustrated.
7. The mechanism for operating the hammer block D and the bar G in relation
thereto substantially as hereinbefore described and illustrated.
Dated this 4th day of January 1889.
HERBERT & Co.,
18, Buckingham Street, Strand, London, W.C.,
Agents to Applicant.