close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2129247

код для вставки
*Sept 6, 1938.
F_ STUCHLY
2,129,247
BELLOWS LOCK FOR ACCORDIONS
Filed NOV. 19, 1936
_Fg J.
INVENTOR
@d 5kg/ay
Patented Sept. 6, 1938
2,129,247
UNITED STATES PATENT OFFICE
2,129,247
BELLOWS LOCK FOR ACCORDIONS
Fred Stuchly, East Pittsburgh, Pa.
Application November 19, 1936, Serial No. 111,634
5 Claims.
(Cl. 84-376)
This invention relates to accordions and par
ticularly to a locking device for the bellows.
The primary object of my invention is to pro
vide a simple and inexpesive locking device for
5 the bellows that shall be disposed entirely with
in the accordion, and that shall be to some extent
automatic in its operation, and that shall be
controllable under certain conditions to opening
position or to closed position by a slight compres
sion of the bellows.
The locking device embodying my invention
consists brielly of a pivoted and weighted latch
ing finger attached to the frame at one end of
the bellows, and a cooperating, receiving, and
15 clamping post supported on and secured to the
frame at the other end of the bellows.
When the accordion is in horizontal resting
2
position, the weighted iinger is biased by gravity
_to a, position where it will engage the clamp to
latch the finger and the clamp together. When
the accordion is rotated into playing position,
the weighted finger is biased by gravity to a
position out of engagement with the clamping
element, thereby permitting the bellows to be eX
25 panded and contracted without any restraint by
the lock elements.
'I'he clamping element of the lock consists of
two spring biased latching elements that are
30
elements thereof;
Figure 6 is an elevational view showing the con
struction of the supporting post and pivot bracket
for the latching elements; and
Figure '7 is a side elevational view of the locking
device of Figure 5, and illustrates the manner in
which the locking elements engage and disen
10
gage under diiîerent conditions.
As shown in Figures 1, 2, and 3, an accordion
I0 consists briefly of an upper frame Il for one
set of control keys I2, a lower frame I3 for sup
porting a similar set of control keys or bars I4, a
centrally disposed bellows l5 and several sets of 15
reed supporting blocks I6.
During the playing of the accordion, the bel
lows l5 is expanded and contracted in order to
force the air through passages controlled by the
keys or stops l2 in order to vibrate the associated 20
reeds,
When the accordion is at rest and is to be car
ried, it is desired that the bellows be compressed
to its maximum `degree and held in such com
pressed position, in order to prevent undesirable 25
normally positioned to provide a recess for re
movement between the various parts of the ac
cordion, The practice heretofore has been to
join the two frames at the ends of the bellows by
a short strap of such limited length as to require
ceiving the finger and holding it in latched posi
the bellows to be tightly compressed before the 30
tion. 'Thus the ñnger may be pressed downward
between the ends of the cooperating latch ele
ments into the recess, or it may be moved to
enter the recess from the side of the latching ele
35 ments. Thus the bellows may be compressed and
the lock permitted to function automatically in
response to gravity to lock the bellows in corn
pressed position, or the finger may be pressed to
locking position with respect to the latching ele
40 ments by external pressure upon the bellows, that
presses the bellows to the maximum compressed
position.
I have illustrated one form of the locking de
vice made in accordance with the principles of
45 my invention, as shown in the accompanying
drawing, in which
Figure 1 is a plan View of an accordion with the
top frame removed to expose the space within
the bellows;
50
Figure 5 is an elevational View of the locking
device illustrating the construction of the Various
»
Figure 2 is a side elevational view of the ac
cordion with parts broken away through the bel
lows and the reed bars to expose the locking
device for the bellows;
Figure 3 is an end elevational view of the ac
55 cordion of Figure 2, with the end wall of the
bellows broken away to show the location of the
locking device;
Figure 4 is an enlarged View of a portion of the
accordion in Figure 3, showing the disposition of
60 the locking device;
strap could be moved to locking position on a
suitable post or pin extending from the side wall
of the frame. The disadvantage of such straps
has been that they are unsightly and are in the
way of the player while he is manipulating the 35
accordion bellows.
The purpose of the present locking device is
to eliminate the use of such external locking
straps and to provide greater freedom to the
40
player of the accordion.
For that purpose I provide a locking device 20,
consisting generally of two elements, namely a
latching ñnger 2l and a cooperating detent 22 for
receiving the latching ñnger 2l.
The ñnger 2l is connected to an arm 23 that 45
is mounted upon a, tubular element 24, that is
secured to a rod 25 pivotally supported at both
ends in stationary bearings 26 and 21. The linger
2| is provided with a disc-shaped weight 28, angu
larly offset from the connecting arm 23 in order 50
to enable the force of gravity acting upon the
weight 28 to impose a rotating or turning move
ment to the arm 23, and consequently to the
ñnger 2|, in order to bias the linger to engage
ment with or out of engagement from the detent 55
22. The movement of the ñnger 2l is further
controlled to limit its movement to either of two
terminal positions, by two limiting stop arms 29
and 30 that are secured to the rotatable rod or
shaft 25. The arms 29 and 30 are so positioned as 60
2
2,129,247
to engage a part of the frame 3| at the associated
end of the bellows.
'I’he detent 22 consists principally of two op
positely positioned latch elements 33 and 34 that
are pivotally mounted at their lower ends on
pivot pins 35 and 36, supported on a plate rest
ing as a head piece on the supporting and an
choring post 39. The two pivoted latching ele
ments 33 and 34 are biased to engaging posi
tion by a substantially U-shaped spring 40, the
lower end of which is anchored on the post 39
and reinforced and encircled by a compression
strap 4|. The upper ends of the spring 40 are
secured to the side edges of the pivoted latching
elements 33 and 34 respectively.
The inner edges of the latching elements 33
and 34 are similarly recessed to provide an open
ing 43 having a relatively straight and continu
ous detent surface 44 against which the latching
20 finger 2| may rest. The upper ends of the piv
oted latching elements 33 and 34 are provided
with converging inclined surfaces 45 and 4E
forming a V-shaped notch for guiding and posi
tioning the ñnger 2| under certain conditions,
25 when the finger is to be moved to its latching
position downwardly and between the two piv
oted latching elements 33 and 34, instead of from
the side. A stop pin 4l' is provided on the head
piece 31 to hold the pivoted latching elements
30 33 and 34 exactly vertical in their closed posi
tions, against any unbalance of the spring arms.
When the accordion is at rest, it will occupy a
That
vertical
is the
position
position
as shown
it occupies
in Figures
when carried
2 and in
its usual carrying case. In that position of the
accordion, the weight on the finger 2i tends to
rotate the finger into locking position with re
spect to the detent elements, as shown in solid
line in Figure 7. If the bellows is compressed
.40 when the accordion is placed in vertical posi
tion, the weight will move in response to gravity
to force the finger into the position shown in
Figure 7. If, however, the bellows is expanded
when the accordion is moved to vertical position,
45 the finger 2| will be moved by the weight 23 to a
position similar to that in solid line in Figure 7,
but above the notch at the ends of the pivot co
operating elements 33 and 34. If the bellows is
now compressed, the finger 2| will be forced to
50 the bottom of the V-shaped notch, which will
then open and separate the pivoted latching ele
ments 33
3d against the biasing action of
the spring 4B until the finger 2| is moved into the
recess 43 between the latching elements. There
55 upon, the latching elements will move together
and the ringer 2l will rest `against the inner sur
face 44 when pressure upon the bellows is re
leased.
The bellows will now be held in com
pressed condition by the locking device,
When the accordion is to be played, the bellows
60
must be unlocked. 'I‘he accordion, when played,
is held in such position that the weight 28 is
under the latching element 22 of the locking de
vice, so that slight compression of the bellows
will release the latching :linger 22 and permit the
weight 28 to move the ñnger out of engagement
with the latching member 22, to the position
shown dotted in Figure '7. The accordion may
then be played and the bellows expanded and
contracted without interference from the locking
70 device.
By means of a construction as shown and the
disposition of the locking device within the bel
lows, the unsightly straps heretofore used to hold
the bellows compressed are obviated, and the
interference from such straps likewise avoided.
My invention is not limited to any specific de
tails of construction that are illustrated, since
details may be modiñed without departing from
the spirit and scope of the invention, as set forth
in the appended claims.
I claim as my invention:
l. The combination with a bellows secured at l0
each end to a frame, of a pivotally mounted
latching iinger on the frame at one end of the
bellows, a weight element eccentrically mounted
on the finger to move the finger to either' of two
positions in response to the force of gravity, and
a detent for the iinger, said detent consisting of
two pivoted levers individually notched to serve
as triggers or catches for the iinger, 4and oppos
ingly positioned to jointly restrain the latching
finger, and a biasing spring for urging the pivoted 20
levers together.
2. A combination as in claim l, in which the
pivoted levers are tapered at their ends to consti
tute a V-shaped notch into which the latching
finger may be guided and pressed to separate the
levers against the force of the biasing spring, to
permit the iinger to pass between the levers to
the space formed by the notches of the levers.
3. A lock for an accordion provided with a
bellows secured at each end to a frame, said lock ,
comprising a pivotally mounted latching finger
on the frame at one end of the bellows, and a
hasp or detent on the other frame to receive the
latching finger, and weight means entirely en
closed within the bellows and frame and asso
ciated with the finger and operative by gravity
13.5
to release said iinger from its detent when the
bellows is held in normal playing position, and
momentarily initially compressed.
4. A locking device for a collapsible container
provided with a bellows secured at each end to
a frame member, said device comprising a latch
ing linger' to be pivotally secured to one frame,
and a detent to be secured to the other frame,
said detent comprising two relatively iiat pivoted
elements and a spring for biasing the two cle
ments to edge to edge engagement, where the
ends will form a V-notch into which the latch
ing iinger may be pressed to separate the pivoted
elements of the detent, those two pivoted ele
ments being notched on an edge behind the end
to provide a joint recess or seat into which the
iinger will move and seat itself against casual
displacement.
5. A locking device for a collapsible container
provided with a bellows secured at each end to
a frame member, said device comprising a latch
ing finger to be pivotally secured to one frame,
and a detent to be secured to the other frame,
said detent comprising two relatively flat pivoted
elements and a spring for biasing the two ele
ments to edge to edge engagement, where the
ends will form a V-notch into which the latch
ing ñnger may be pressed to separate the pivoted
elements of the detent, those two pivoted ele 65
ments being notched on an edge behind the end `
to provide a joint recess or seat into which the
ñnger will move and seat itself against casual
displacement, and a weight on the latching finger
mounted to bias it to disengaging position when
70
the bellows is held in playing position.
FREDy s'rUcHLY.
Документ
Категория
Без категории
Просмотров
0
Размер файла
383 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа