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Патент USA US2134854

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Nov. l, 1938.v
J_.M_ BOLSTER
«2,134,854
ACCORDION STRAPADJUSTING DEVICE
Filed Sept. 4, 193'?
|ï l' /7 | l l .15 ill"
a1
W1.
7
Patented Nov. 1, 1938
2,134,854
UNITED STATES PATENT OFFICE
2,134,854
ACCORD‘ION STRAP ADJUVSTING DEVICE
John M. Bolster, Minneapolis, Minn., assignor to
Edward Trañcante, Minneapolis, Minn.
Application September 4, 1937, Serial No. 162,472
1 Claim. (Cl. 84-376)
Myr invention relates tok accordions and par
ticularly to .adjusting devices for the Wrist-en
gaging straps thereof.
Proper and comfortable operation of an ac
5 cordion requires that the strap which engages
the left hand' of the operator be adjustable to
enable obtaining a degree of slack therein which
permits proper operation of the accordion bel
lows and easy iingering of the keys controlled
10 by the left hand. It is, of course, highly de
sirable that the strap-adjusting means be quick
ly and easily manipulatable to obtain a desiredadjustment and that the adjusting means does
not constitute an obstruction or impair the ap
pearance of the accordion. The usual type of
strap-adjusting means employed on accordions
constitutes an obstruction of not particularly
pleasing appearance and which may be relative
ly easily entangled with portions of a musician’s
costume or other articles.
A general object of my invention is to provide
an accordion strap-adjusting device which may
be almost entirely concealed within` the struc
ture of an accordion, which will not detract from
the appearance of an accordion, which cannot
constitute an obstruction, and which may be un
usually easily manipulated.
Another object is to provide an accordion
strap-adjusting device enabling concealment of
30 the end of the strap connected therewith and
associated construction whereby the remaining
end of the strap may be concealed to harmonize
with the ñrst mentioned end.
Still another object is to provide an accordion
35 strap-adjusting device of such construction that
only a segment of a rotary control element
thereof is visible from the exterior of the ac
cordion.
A further object is to provide such a strap
40 adjusting device of simple, compact, rugged,
effective and inexpensive construction.
These and other objects and advantages of the
invention will more fully appear from the fol
45
lowing description, made in connection with the
accompanying drawing, wherein like reference
characters refer to the same or similar parts
throughout the several views, and in which
Fig. 1 vis a top View of an accordion having
an embodiment of my invention incorporated
therein;
Fig. 2 is a partial rear view partially broken
away to show parts embodying my invention;
Fig. 3 is a section taken along the line 3_3
55 of Fig. 2, as indicated by the arrows, and
Fig. 4 is a section taken along the line 4-4
of Fig. 2, as indicated by the arrows.
Referring to the drawing, an embodiment of
my invention is shown associated with an ac
cordion A which includes a keyboard 5 and a
pair oi boxes 6 and -I having bellows 8 there
between and attached to the respective boxes
6 and `I in the usual manner. The lower (as in
Figs. l, 2 and 3) side of the box -I includes a
removable ypanel 9, which is normally secured
to the box 1.
`
As usual in accordion construction a strap I0
is provided extending longitudinally of the lower
side of the accordion, this strap being adjust
able as to the amount of slack therein by suit
able means.
The right hand end of the removable panel
9 is notched at 6a to provide an opening through
which the right hand end of the strap Iii ex
tends into the interior of the box -I. I provide
suitable means for securing the right hand end
oi the strap to the inner side of the panel S.
This means may consist of a metal plate II and
screws I Ia extending through the metal plate I I,
the strap il) and into the material forming the
panel 9.
The remaining or left hand end of the panel
9 is provided with a notch 9b through which
the remaining or left hand end of the strap I0
projects into the interior of the box 'I. An elon 30
gated externally screw threaded element I2 is
attached to the left hand end of the strap I0
to project therebeyond as shown in Figs. 2 and
8. An element IZa of U-shaped cross section is
joined with the inner end of the elongated ele
ment I2 and receives the end of the strap Ill.
The U-shaped element I2a is secured to the
strap I0 by suitable means such as the rivets I3.
Beyond the end of the strap I3 a bracket I4 is
secured to the inner side of the left hand (as
viewed in Fig. 2) wall 'Ia of the box 'I. The
bracket I4 has an inwardly directed portion |40.
which is provided with a central aperture
through which the elongated element I2 pro
jects. A moderate distance beyond the bracket
I4 a second bracket I5 is secured to the inner
side of the left hand wall of the box 'I. The
second bracket I5 is provided with an inwardly
projecting portion I 5a which has an aperture
.alined with the aperture of the ñrst bracket I4
and through which the elongated element I2 ex
tends. A centrally apertured and internally
screw threaded operating element I6 preferably
of circular peripheral shape is screw threadedly
mounted on the elongated element I2 between 55
2
2,134,854
the portions Illa and I5a of the respective brack
ets I4 and I5. The rotary operating element I6
is provided with journals ISa on the respective
sides thereof, these journals being rotatably dis
posed in the apertures of the respective brackets
I4 and I5, The journal IGa at the lower side
of the element I6 is shouldered at its inner por
tion as at IGI) to form a surface for bearing
against the bracket I4.
Obviously rotation of
the rotary element I 6 will cause movement of
the elongated element I2 axially thereof and,
hence, will reduce or increase slack in the strap
I0.
The above described parts are so arranged
that the rotary control element I6 may be
manipulated from a point exterior to the box
'1. For this purpose the left hand Wall ‘Ia of the
box 'i' is provided with a slot I1 and the rotary
element I6 is of such diameter as to project
20 in a portion thereof through the slot I‘I to ex
pose a segment of the rotary element I6 exterior
ly of the box `I.
It is to be noted that the strap-adjusting de
vice described above is so arranged that all of
the same except for a segmental portion of the
ed on the exterior of the box 'I in such manner
that removal of the panel 9 does not swing the
strap out of a position wherein it Will partially
obstruct access to the interior oí the accordionl
It is apparent that I have invented a novel,
eiîective, compact, simple, easily operated and
almost entirely concealed form of adjusting and
attaching means for an accordion` strap.
It will, of course, be understood that various
changes may be made in the form, details, ar
rangement and proportions of the various parts
without departing from the scope of my inven
tion, which, generally stated, consists in the mat
ter shown and described and set forth in the ap
pended claim.
What is claimed is:
In an accordion including a box at one end
thereof and a wrist-engaging strap extending
longitudinally of the outer side of said box, one
end of said strap being secured to one end of said 20
outer side, the remaining end of said outer side
having an opening therethrough through which
the remaining end of said stra-p projects into the
interior of said box, a pair of spaced elements
mounted in said box and having aligned aper 25
rotary control element I6 is contained and con
tures through the respective ones thereof aligned
cealed within the box -I. It is to be noted that
the device includes no portions of such a nature
with said remaining end of the strap, an elon
gated externally screw-threaded element se
as to impair the external appearance of the ac
30 cordion or constitute an obstruction which may
become entangled with a user’s clothing or other
articles. It is also to be noted that the right
hand end of the strap IIJ, as viewed in Fig. 2, is
anchored by means contained and concealed
within the box "i, so as to be in accord with the
concealed arrangement of the adjusting device
at the left hand end oi the box 'I. Furthermore,
when the panel 9 is removed for obtaining access
to the interior of the accordion, the panel 9 may
40 be swung outwardly and to the left with the strap
IQ moving therewith so as to enable completely
unobstructed access to the interior of the ac
cordion. In this connection, it is to be appreci
ated that the usual means for attaching a strap,
such as the strap IU to an accordion, are mount
cured at one of its ends to said remaining end of
the strap and extending therefrom through the 30
apertured portions of said spaced elements, and
a centrally apertured and internally screw»
threaded rotatable element screw-threadedly
mounted on said elongated element between
said spaced elements, said box having an 35
opening therein aligned with the space be
tween said spaced elements and part of the mar
ginal portion of said rotary element being projected through said opening to present a portion
of the periphery of said rotary element exteri 40
orly of said box to enable convenient manipula
tion of said rotary element for varying the slack
in said strap.
JOHN M. HOLSTER.
45
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