U.S. patent application number 10/487247 was filed with the patent office on 2004-09-30 for music stand.
Invention is credited to Michell, Andrew.
Application Number | 20040188587 10/487247 |
Document ID | / |
Family ID | 9922547 |
Filed Date | 2004-09-30 |
United States Patent
Application |
20040188587 |
Kind Code |
A1 |
Michell, Andrew |
September 30, 2004 |
Music stand
Abstract
There is provided a music stand which comprises a telescopic
stem, a sheet music holder at one end of the stem and a supporting
base at the other end of the stem, wherein the stem provides a
retracted position and at least one extended position, the holder
being pivotally attached to the stem so as to be rotatable between
an angled position relative to the stem and a closed position
against the stem.
Inventors: |
Michell, Andrew; (London,
GB) |
Correspondence
Address: |
BIRCH STEWART KOLASCH & BIRCH
PO BOX 747
FALLS CHURCH
VA
22040-0747
US
|
Family ID: |
9922547 |
Appl. No.: |
10/487247 |
Filed: |
February 20, 2004 |
PCT Filed: |
September 10, 2002 |
PCT NO: |
PCT/EP02/10112 |
Current U.S.
Class: |
248/457 |
Current CPC
Class: |
A47B 19/002
20130101 |
Class at
Publication: |
248/457 |
International
Class: |
A47G 001/24 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 22, 2001 |
GB |
0122897.2 |
Claims
1. A music stand which comprises a telescopic stem, a sheet music
holder at one end of the stem and a supporting base at the other
end of the stem, wherein the stem provides a retracted position and
at least one extended position, the sheet music holder being
pivotally attached to the stem so as to be rotatable between an
angled position relative to the stem and a folded position against
the stem, wherein the sheet music holder includes one or more
transverse ledges and, in which on moving from the angled position
to the folded position the one or more transverse ledges of the
sheet music holder are directed towards rather than away from the
stem.
2. A music stand as claimed in claim 1, in which the sheet music
holder includes two transverse ledges one above the other.
3. A music stand as claimed in either of claims 1 or 2, in which
the sheet music holder is in the form of a flat plate.
4. A music stand as claimed in claim 3, in which the flat plate
comprises a planar tray like structure.
5. A music stand as claimed in claim 2, in which a gap is provided
in the ledge or ledges to permit the music-supporting side of the
holder plate to fit snugly against the stem when in the folded
position.
6. A music stand as claimed in claim 2, in which the holder is
attached to the stem by a pivot whose axis runs transversely some
way up the ledge and on the far side of it from the sheet
music.
7. A music stand as claimed in claim 1, in which the underside of
the music holder is shaped to match the folded configuration of
other stands according to the invention so that when one folded
stand is placed on another the stands engage with each other so as
to assist orderly stacking.
8. A music stand as claimed in claim 1, in which the music holder
is pivotally attached to the stem by a pivot member which comprises
a pivot pin having an axis parallel to the plane defined by the
sheet music holder.
9. A music stand as claimed in claim 8, in which the pivot member
presents a level of friction to relative movement of the stem and
holder such that the holder can be rotated to a desired angle and
left there without the need for a locking device.
10. A music stand as claimed in claim 9, wherein the pivot member
comprises a slotted spring pin such as to torsionally provide said
level of friction.
11. A music stand as claimed in claim 8, in which the pivot member
is attached to a point on the centre line of the holder.
12. A music stand as claimed in claim 1, in which the stem consists
of a number of telescopic elements having friction joints between
adjacent telescopic elements.
13. A music stand as claimed in claim 12, in which the telescopic
elements are of successively smaller cross-sectional size such that
each one fits inside the next with a sufficient clearance to
receive bearing elements which provide the desired friction
joints.
14. A music stand as claimed in any claim 13, in which at least
some of the bearing elements are spring-loaded.
15. A music stand as claimed in claim 12, in which the telescopic
elements are of non-circular cross-section.
16. A music stand as claimed in claim 15, in which the telescopic
elements have a hexagonal shape with two opposing sides of greater
length than the other sides.
17. A music stand as claimed in claim 12, wherein the telescopic
elements are all of substantially the same length.
18. A music stand as claimed in claim 1, in which the retracted
length of the stem relative to the height of the music holder and
the fore and aft dimension of the base are such that the retracted
stem fits within the envelope formed by the folded holder and
base.
19. A music stand as claimed in claim 1, in which the thicknesses
of the stem and base are less than the depth of the transverse
ledge(s) such that in the folded position they are within the
envelope formed by the folded holder and base.
20. A music stand as claimed in claim 1, in which the base is in
the form of an inverted box.
21. A music stand as claimed in claim 1, in which the base is
formed of two elongated legs, one either side of the stand and
fixedly joined to each other by a cross member which supports the
stem.
22. A music stand as claimed in claim 21, in which the legs and the
cross member are joined in the shape of the lower part of a capital
A.
23. A music stand as claimed in claim 1, in which the base
comprises two legs which are each pivotally and independently
attached to the said cross member.
24. A music stand as claimed in claim 23, wherein the two legs are
coupled through a coupling member such that the legs are movable in
coupled fashion relative to each other.
25. A music stand as claimed in claim 1, in which the stem in the
erect position slopes towards a user.
26. A music stand as claimed in claim 1, having retention means
between the base and stem which includes one or more of friction
means, a spring mechanism or stops to retain the stand in the
respective folded and erect positions.
27. A music stand as claimed in claim 26, wherein the retention
means comprises a pivot member which includes one or more of
friction means, a spring mechanism or stops.
Description
[0001] This invention relates to a music stand which when not in
use can be folded into a convenient shape for storage and
transportation.
[0002] Conventional music stands include a substantially vertical
stem, a supporting base with legs or feet, and a sheet music holder
typically in the form of a tray or desk. Adjustment means are
commonly provided to permit the music holder to be set at a
preferred angle relative to the stem. Further adjustment means are
commonly provided on the stem to control the height of the stand,
this being typically assisted by employing a telescopic stem. The
base and music holder may also be constructed to permit folding
into a shape which facilitates packing, storage and
transportation.
[0003] The known folding music stands suffer from a variety of
disadvantages. Starting from the erect configuration the music
holder generally has to be removed from the stem, thus splitting
the product into two pieces which must be handled and stored
separately. Some stands have music holders formed by a framework of
pivoting bars which can be folded into a linear configuration, but
these have the disadvantage that the framework does not provide
sufficient support to enable a musician to write on a flimsy score.
The folding bases usually have a tripod configuration of legs which
in the open position may get in the way of the musician's feet.
[0004] Numerous screws or other locking devices have to be operated
to enable the conventional stands to be dismantled and folded.
Moreover, the folded shape of such stands does not lend itself to
neat stacking or nesting.
[0005] It is therefore an objective of the present invention to
provide a music stand which provides a firm support for sheet
music, has a wide range of adjustment in use and yet folds into a
convenient shape for storage and transportation.
[0006] According to the present invention there is provided a music
stand which comprises a telescopic stem, a sheet music holder at
one end of the stem and a supporting base at the other end of the
stem, wherein the stem provides a retracted position and at least
one extended position, the sheet music holder being pivotally
attached to the stem so as to be rotatable between an angled
position relative to the stem and a folded position against the
stem, wherein the sheet music holder includes one or more
transverse ledges and, in which on moving from the angled position
to the folded position the one or more transverse ledges of the
sheet music holder are directed towards rather than away from the
stem.
[0007] The invention provides for a music stand which can be folded
from the erect position in three simple movements: retracting the
stem, rotating the holder and folding the base. These movements can
be undertaken in any sequence: The invention further provides for a
stand which can be folded into a convenient flat configuration.
[0008] The music holder is preferably in the form of a flat plate
with one or more transverse ledges. The ledges are usually
comprised on the music supporting face of the holder. The ledges
are generally fixed relative to the holder, but in embodiments may
be arranged to be movable relative thereto for example by means of
a pivot arrangement which enables the ledges to be folded towards
and away from the holder (e.g. storage and in-use configurations).
The flat plate can conveniently be approximately the same size as
the music sheets it is intended to support.
[0009] The flat plate generally consists of a planar tray like
structure, but in embodiments it may also be formed by a fan-like
array of elements, which in combination define a flat plate form.
In use with the stand in the raised position, sheet music is laid
on the plate, with its lower edge(s) being supported by a
transverse ledge. In one convenient embodiment of the invention the
plate carries two transverse ledges one above the other: the upper
ledge supporting sheet music, the lower ledge receiving such items
as batons, pencils and erasers.
[0010] The pivotal attachment is preferably such that in the folded
position the ledge or ledges on the (music supporting face of the)
holder are directed towards rather than away from the stem. A gap
is preferably provided in the ledge or ledges to permit the
music-supporting side of the holder plate to fit snugly against the
stem when in the folded position. The gap is preferably at the
centre of the ledge. Provision of such gaps ensures that the holder
can be rotated from its in-use position until the side upon which
the music normally rests is in contact with the stem, this
configuration being particularly advantageous in reducing the
storage volume of the folded stand.
[0011] The underside of the music holder is preferably shaped, for
example with depressions or projections, to match the folded
configuration of other stands according to the invention so that
when one folded stand is placed on another the stands engage with
each other so as to assist orderly stacking. The music holder is
pivotally attached to the stem by a pivot member which typically
comprises a portion attached to the music holder, a portion
attached to the stem, and a pivot pin common to the said portions.
The axis of the pivot pin is preferably parallel to the plane of
the flat plate.
[0012] Preferably the pivot member presents a level of friction to
relative movement of the stem and holder such that the holder can
be rotated to a desired angle and left there without the need for a
locking device.
[0013] Preferably, the pivot member comprises a slotted spring pin
such as to provide said level of friction. Suitably, the slotted
spring pin comprises a cylindrical metal tube having a slit portion
cut along its length such that in cross-sectional view it presents
a circular profile with a slit cut through it. In aspects, the pin
is made of spring steel and the slot enables it to be pushed into a
hole which is smaller than the pin's free diameter, thereby
ensuring that there exists a predictable level of contact force
between the pin and the wall of the hole. This contact force in
turn ensures that when the pin tries to turn within the hole a
predictable level of friction is developed between the pin and the
hole, which opposes the turning torque.
[0014] The pivot member is preferably attached to a point on the
centre line of the holder. In general the attachment is most
conveniently made to the centre of a transverse ledge on the lower
edge of the holder, the pivot member being positioned within the
height of the ledge in order for the stand to fold flat.
[0015] The preferred direction of folding is for the
music-supporting side of the holder to be rotated to a folded
position in which that side of the holder faces the stem. If the
holder is set for use at an angle of 30.degree. to the vertical the
rotation will therefore be through an angle of about
210.degree..
[0016] In one embodiment of the invention the holder is attached to
the stem by a pivot whose axis runs transversely some way up the
ledge and on the far side of it from the sheet music. The design
and position of this pivot should be such that when the stand is in
use the pivot member does not protrude in any way into the part of
the holder on which the sheet music rests.
[0017] The stem consists of a number of telescopic elements. In a
preferred embodiment of the invention friction joints are provided
between adjacent telescopic elements. Such joints offer the
advantage that the relative position of the telescopic elements to
each other, and thus the height of the stand, can be readily
adjusted without the need to slacken and re-tighten locking
devices.
[0018] It is important that the stem has good lateral rigidity in
its extended state. In a preferred embodiment of the invention to
address this requirement the telescopic elements are of
successively smaller cross-sectional size such that each one fits
inside the next with a sufficient clearance to receive bearing
elements which provide the desired friction joints. It is preferred
that at least some of the bearing elements are spring-loaded, for
example with leaf springs. The bearings should include stops to
prevent the respective elements from being separated from each
other.
[0019] Provision of internal bearing elements offers the advantage
that both the friction joints and the means for aligning successive
elements are entirely accommodated in the space between adjacent
members so that each element can be of substantially the same
length. Thus unlike many previous stands, the extra length gained
by adding another element does not decline with each successive
element.
[0020] The telescopic elements are preferably of non-circular
cross-section. This prevents twisting of the stem and thus prevents
rotation of the holder relative to the base. Preferred non-circular
shapes include elliptical or polygonal cross-sections since these
enhance the torsional stiffness of the stem, especially for stems
with spring-loaded bearings. A hexagonal shape with two opposing
sides of greater length than the other sides is especially
preferred.
[0021] Preferably, the telescopic elements are all of substantially
the same length.
[0022] The retracted length of the stem relative to the height of
the music holder and the fore and aft dimension of the base are
preferably such that the retracted stem fits within the envelope
formed by the folded holder and base. Similarly the thickness of
the stem and base are preferably less than the depth of the
transverse ledge(s) such that in the folded position they are also
within the said envelope. Such dimensions help in ensuring a
convenient folded shape which facilitates transport and
storage.
[0023] There are several convenient options for the shape of base
according to the invention. It must however be of a sufficient size
and weight to support the erect stand and may if required be
weighted to improve stability.
[0024] In one configuration the base is in the form of an inverted
box. This has the advantage that when the stand is folded the base
and holder form an enclosed case with the retracted stem inside.
Sheet music and other items could then also be carried inside the
case. A carrying handle is preferably provided on an outside edge
of the box.
[0025] In other configurations the base may be formed of two
elongated legs, one either side of the stand and fixedly joined to
each other by a cross member which supports the stem. Preferably
the legs and the cross member are joined in the shape of the lower
part of a capital A. This configuration not only gives the base a
low profile but also enables multiple erected stands to nest
compactly together.
[0026] In a preferred version of stand according to the invention
the stem is inclined slightly to the vertical in the erect
position, for example at an angle of about 15.degree., sloping
towards the user and thus distancing the base from the user's
feet.
[0027] The base can be attached to the stem by a pivot member
similar to that attaching the music holder to the stem, but with a
slightly different range of adjustment to allow the base to be
rotated between the folded position in which the base is parallel
to the stem and the erect position in which the base is parallel to
the floor. The axis of rotation of this pivot member should be
transverse to the stem and parallel to the axis of rotation of the
music holder.
[0028] Preferably, the stand is provided with retention means
between the base and the stem to retain the stand in the respective
folded and erect positions.
[0029] Suitably, a pivot member between the base and stem acts as
the retention means, and preferably includes one or more of
friction means, a spring mechanism or stops to sustain it in the
respective folded and erect positions but does not need to be
stable at positions between the folded and erect positions.
Depending of the configuration of the pivot member, movement of the
base between the erect position to the folded position against the
stem either requires rotation though 270.degree. plus any inclined
angle of the erect stand, or through 90.degree. less any inclined
angle of the erect stand. The means to sustain the base in the
folded position must be of sufficient strength to support the
weight of the base, including any stability weights within it.
[0030] In alternative embodiments of the invention the base may
comprise two legs which instead of being fixedly joined to a cross
member which supports the stem are each pivotally and independently
attached to the said cross member. The pivot configuration can
either be such that the legs can be folded inwards to a position
parallel to and aligned with the said cross member or folded
upwards to positions parallel to the stem. In one aspect, such
independently rotatable legs their respective pivot members
preferably include a dog mechanism to retain the legs in their
respective folded and erect positions. In another aspect, the
movement of the two legs is coupled through a coupling member (i.e.
the legs are movable in coupled fashion).
[0031] To fold the stand, the holder is rotated until it lies flat
against the stem, the stem is retracted to its minimum length, and
the base is moved into its folded position. In this state the stand
presents a substantially flat object approximately the size of a
music score, with a depth equal to the depth of the ledge on the
holder. Especially when the option of having locating devices is
adopted, successive folded stands can be stacked in a stable
manner.
[0032] Stands according to the invention offer a number of
advantages: a firm and solid music holder; adjustment over a wide
range of heights and angles; a base which sits flat on the floor.
They can be folded and erected in three simple movements. They also
offer a unitary construction, without the need for separately
operated locking devices, and which avoids the problems associated
with stands that need to be dismantled into two or more constituent
parts.
[0033] The invention is further described with reference to the
accompanying drawings, in which:
[0034] FIG. 1 is a perspective view of a first version of music
stand according to the invention and shown in the raised position
ready for use;
[0035] FIG. 2 is a side section through the base of the stand shown
in FIG. 1, as viewed from A-A in FIG. 1;
[0036] FIGS. 3a, 3b and 3c are detailed views of portions of the
stem of the music stand shown in FIGS. 1 and 2; FIG. 3a shows the
assembled stem in an extended position whereas FIGS. 3b and 3c
present an exploded view of stem components;
[0037] FIG. 4 is a section through the centre of the music holder
of the music stand shown in FIGS. 1 to 3, as viewed from B-B in
FIG. 1;
[0038] FIG. 5 is a section through the centre of an alternative
version of music holder according to the invention, as viewed from
a similar position to FIG. 4;
[0039] FIG. 6 is a perspective view of an alternative version of
the stand;
[0040] FIG. 7 is a perspective view of another alternative version
of the stand;
[0041] FIGS. 8a, 8b, 8c and 8d show side views of the stand of
FIGS. 1 to 4, illustrating how it can be folded; and
[0042] FIG. 9 shows a variation of the music stand of FIG. 1.
[0043] The version of the stand illustrated in FIGS. 1 to 4 has a
base 1, a telescopic stem 9 and a music holder 10 in the form of a
tray.
[0044] The base 1 has a left leg 3 and a right leg 4, rigidly
connected to the left and right ends respectively of a tubular bar
5 (shown in FIG. 2) and having small feet 2 at either end. The bar
5 is located and rotatable within a tubular bracket 6 attached to
the lower end of the stem 9. The legs 3 and 4 and the bar 5 are
joined in the shape of the lower part of a capital A.
[0045] The bar 5 has a hole 7 through which a ball bearing 8 is
pushed under the action of a coil spring 8a towards the interior of
the bracket 6. The number of such balls 8 and springs 8a can be
varied in order to achieve sufficient force, and in one aspect,
there are 4 of each of them. Furthermore, the axis of one or more
of the ball bearing and spring pairs can be rotated very slightly
relative to the others in order to eliminate backlash between the
bar 5 and the bracket 6 at the fixed positions.
[0046] In one aspect as shown, shaped recesses 10a and 10b are
provided within the bracket 6 so as to limit movement of the ball
9, and thus of the base 1, between positions 10a and 10b via an
intermediate part 10c of the internal surface of the bracket 6.
Thus the base 1 can be rotated through about 270.degree. within the
bottom bracket 6 between the two extreme positions 10a and 10b, and
is held in either one until rotated to the other.
[0047] In another aspect, shaped recesses 10a and 10b are provided
within the bracket 6 so as to provide preferred positions of the
ball 9, and thus of the base 1, in positions 10a and 10b of the
internal surface of the bracket 6. Thus the base 1 can be rotated
within the bottom bracket 6 between the two positions 10a and 10b,
and is held in either one until rotated to the other.
[0048] The telescopic stem 9 consists of five tubular elements 11,
12, 13, 14,15, each of hexagonal lozenge-shaped cross-section. The
said tubular elements are of successively smaller size such that
they fit inside each other with some clearance., providing space
for bearing elements 16, 17, 18, 19 to be located between them. For
clarity of illustration the bearing elements 16 and 17 are shown in
FIG. 3b externally to the tube 11, although in practice they are
located within the tube 11 as shown in FIG. 3a. The bearing 16 is
fixed to the inside of the tube 11 at its upper end, and prevented
from movement along the tubes 11 and 12 by an outwardly protruding
spigot 16a which engages in a hole 11 a in the tube 11. The bearing
17 is similarly located within the opposite side of the upper end
of tube 11, again with an outwardly protruding spigot 17a which
engages in a hole 11a in the tube 11, but with a leaf spring 20
interposed between the bearing 17 and the inside face of the tube
11. Bearing 18 is located on the outside of tube 12 at its lower
end, and prevented from axial movement by an inwardly protruding
spigot 18a which engages in a hole 12a in the tube 12. Bearing 19
is similarly located and prevented from axial movement on the
opposite side of tube 12 and with a leaf spring 20 interposed
between the bearing 19 and the outside face of the tube 12.
[0049] In the assembled stand the bearings 16, 17, 18, 19 and leaf
springs 20 keep the tubes 11 and 12 in the required alignment to
ensure a stable configuration of the stem 9, in which axial sliding
can only take place when the surface friction provided by the
springs 20 has been overcome. The telescopic extension of the tubes
11 and 12 is limited by bearings 16 and 18 making contact, and they
are provided with resilient ends to act as buffers.
[0050] The tray 10 is attached to the top of stem 9 by a pivot
member comprising a top bracket 21 attached to the stem 9, a
slotted spring pin 22 and flanges 23 on the tray 10. The pin 22
passes through the tray flanges 23 and the top bracket 21, thereby
acting as a pivot axle. The pin 22 is a tight fit within the
flanges 23 and the top bracket 21 so as to provide torsional
friction which maintains the tray 10 at any angle chosen by the
user. The spring pin 22 is arranged to remain a tight fit
irrespective of wear of the rubbing surfaces because its free
diameter is greater than the bore diameter of the flanges 23 and
the bracket 21.
[0051] Two ledges, 24 and 25, are provided across the lower edge of
the tray 10. The first ledge 24 is to prevent music sheets from
sliding off and the second ledge 25 provides storage for batons,
pencils, erasers, etc. The ledges 24 and 25 each have a central gap
and a depth such that in the folded position of the stand the tray
10 can be folded into a plane parallel to the axis of the stem
9.
[0052] FIG. 5 shows an alternative version of tray according to the
invention, in which just one ledge 34 is provided. In this version
the pivot member is located beneath the ledge 34 and comprises a
top bracket 31 attached to the stem 9, a slotted spring pin 32 and
flanges 33 on the underside of the ledge 34. The ledge 34 again has
a central gap to accommodate the stem 9 in the folded position. The
pin 32 is again a tight fit within the flanges 33 and the top
bracket 31 so as to maintain the tray 10 at any chosen angle.
[0053] FIG. 6 shows an alternative version of stand according to
the invention, in which the base takes the form of an inverted box
40 with a carrying handle 41. When the stand is folded the base 40
and tray 10 form a case with the retracted stem 9 inside. Sheet
music and other items can then also be carried Inside the case.
[0054] FIG. 7 shows a further version of stand according to the
invention, with a different means of attachment of the base legs.
In this version legs 53 and 54 form with a bar 55 an opened base of
similar "truncated A" appearance to that of FIG. 1. In the FIG. 7
version however the legs 53, 54 pivot about axes 56 and 57
respectively parallel to the stem 9.
[0055] FIG. 8a is a side view of the stand of FIGS. 1-4. It
indicates by curved line A the action of rotating the music-holding
tray 10 from its erect position to lie flat against the stem 9.
FIG. 8b indicates by line B the rotation of the base 9 into its
folded position. FIG. 8c indicates by line C the push action
necessary to retract the stem 9 to its minimum length. Finally FIG.
8d shows the stand fully retracted with the tray 10 and base 1
lying flat against the stem 9 and thus presenting a substantially
flat object for subsequent handling or storage.
[0056] FIG. 9 shows a variation of the music stand of FIG. 1, in
which all elements of the stand correspond with those of FIG. 1
except leg elements 58 and 59. In the configuration of FIG. 9, the
legs 58 and 59 point away from the musician rather than towards
him. This has the advantage that the stem 9 is nearly vertical, and
therefore the centre of gravity does not move nearer to the
musician as the stand is raised. On the other hand the
configuration shown in FIG. 1 invites the musician to stand in the
open part of the base, and is therefore in some ways more
user-friendly. The stem 9 in FIG. 1 is also less likely to get in
the musician's way.
* * * * *