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Патент USA US3086620

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April 23, 1963
N. w. HAAS
3,086,610
STEITHOSCOPE
Filed June 22, 1961
m\y’
X0
to Sttes
tilt
Patented Apr. 23, 1963
1
2
3,086,610
biasing force so that when the operator spreads the head
tubes 11 to place the ear pieces '12 in his ears, such force
STETHOSCOPE
Nelson W. Haas, 841 N. Austin 8-, San Benito, Tex.
Filed June 22, 1961, Ser. No. 118,926
3 Claims. (Cl. 181—24)
will ‘maintain the ear pieces in place. However, when
the stethoscope it)‘ is not being used, it presents a cumber
some elongated assembly that is dif?cult to store away.
At best, the rubber tubing 13 can be folded over itself so
that the listening device 14 swings between the head tubes
This invention is directed to a stethoscope and is par
11. However, the full length of the head tubes 11 is
ticularly concerned with a hinge arrangement for the
unchanged, and if the operator wishes to place the stetho
head tubes.
In stethoscopes used for magnifying sounds the head 10 scope 10 in his pocket, this length is so long that the
stethoscope will protrude ‘from the pocket in the way of
tubes have formerly vbeen formed with an integral ?at
movement and is likely to fall therefrom. That is why
spring to exert a biasing force between them. However,
doctors and other users of Stethoscopes are often seen
when the stethoscope is not being used, this construction
wearing the stethoscope with the head tubes around the
results in an instrument that is bulky and dif?cult to store
as it takes up considerable room. This is a particular 15 neck when not in use rather than to place the stethoscope
in the pocket.
problem in the medical profession when it is desired to
In the improved stethoscope shown in FIG. 2 the head
maintain the instrument on the person, such as by placing
tubes 2i curve inwardly at one end to receive ear pieces
it in the pocket. Since the type of instrument used is not
22 mounted thereon. The other end of the head tubes
able to be changed into a more compact assembly, this
results in the instrument projecting dangerously out of 20 21 are mounted within ends of rubber tubing 23, and the
rubber tubing 23 is fastening onto a listening device 24.
the pocket, and in many instances the user will continue
Between the ends of each head tube 21 in connecting
to wear it around the neck even though it is not in use.
relationship adjacent the rubber tubing connection is
In accordance with the present invention this problem
mounted a double hinge arrangement. Preferably the
of compactness is solved by ,a special hinge arrangement
between the head tubes which allows the instrument to 25 double hinge is attached to the head tubes 21 by a cuff
25 terminating on its inside in a ?ange 26. This cuff 25 is
be folded onto itself into a compact assembly that is
best seen in‘ FIG. 3 as ‘a circular shaped ‘mounting around
easily carried or stored.
It is an object of this invention to provide a stethoscope
that is easily carried or stored.
It is another object of this invention to provide a stetho
scope having parts that can be folded over each other to
head tube 21 and having a gap 27 between its outside
edges to allow engagement with head tube 21 to be
loosened by spreading the edges apart or tightened by
moving the edges together so that the cuff 25 can be
adjustably clamped on head tube 21.
form a compact assembly.
stethoscope having a double hinge assembly between the
Since cuff 25 has this adjustable feature, it will be seen
that the cuff assembly can thus be positioned at any de
‘head tubes to allow said head tubes to fold over parallel
sired location along the head tube 21 to assure a com
to each other and the hinge bars when the stethoscope is
fortable ?t between the ears and the chin for the operator.
The double hinge arrangement is seen to comprise a
It is a further object of the invention to provide a
not in use.
pair or" curved bars 29 pivotally fastened at their ends by
rivets 28 to the top and bottom of each ?ange 26. As
It is a still further object of the invention to provide a
stethoscope having curved bars between the head tubes
to arch under the chin and thus allow the head tubes 40 seen from FIGS. 2 and 3 the curved bars 29 form the
double hinge between‘ head tubes 21 by being pivotally
to be shorter, so that all component parts of the device
mounted on the rivets 28. Each bar 29 is mounted at
are of approximately the same length.
is ends on the same side of a ?ange 26 with one end on
It is another object of the invention to provide a stetho
scope that has a comfortable ?t when in use and a com
pact shape when not in‘ use.
Other objects and advantages of the present invention
should be readily apparent by reference to the following
description, considered in conjunction with the accom
panying drawings forming a part thereof, and it is to be
45
a top rivet and the other end on a bottom rivet. As seen
in FIG. 3 the bars 29 are therefore spaced from‘ and
parallel to each other. It should be pointed out that the
use of a cuff and its adjustability feature is merely a
preferred embodiment since it affords a sturdy connec
50 tion for the ?ange 26. However, it is understood that
other connecting devices could be used for the ?ange
connection, and they need not be adjustable.
the scope of the appended claims, without departing from
A biasing means is attached between the cuffs 25, 25.
or exceeding the spirit of the invention.
As shown in the present embodiment this biasing means
In the drawings:
55 comprises a semi-circular wire 32 depending adjacent the
FIG. 1 is a plan view of a conventional stethoscope;
end of each bar 29 at each upper pivot point to which a
spring 33 is hooked so that as seen in FIGS. 3, 4 and 5,
FIG. 2 is a View, partly in section, similar to FIG. 1
showing a stethoscope illustrating the embodiment of the
the spring 33 extends from the end of one bar to the
present invention in the operational position;
opposite end of the other bar. For protective purposes
understood that any modi?cations may be made in the
exact structural details there shown and described, within
FIG. 3 is a section taken along line III—~III of FIG. 60 an elastic tube 34 covers the spring, although in‘ FIG. 2
2; and
PEG. 4 is a view of the stethoscope of FIG. 2 in the
folded position with the rubber tubing and listening de
vices not shown for clarity.
In considering the present invention it is ?rst referred 65
to the conventional stethoscope ‘10 of FIG. 1 which in‘
cludes the usual head tubes 11 having attached ear pieces
12 at the proximal end of each head tube. On the other
end of each head tube or head piece 11 ?ts rubber tubing
13 which has the usual listening device or chest piece 14 70
attached at the remote end. Connected between the head
tubes 11 is a ?at spring 16. The spring 16 provides a
this elastic tube 34 is partly broken away for clarity to
show the spring.
Each bar 29 is concavely curved with respect to the
ear piece 22. This allows the bars 29 to comfortably fit
below the chin of the operator when the stethoscope is
being used.
From a comparison of FIGS. 1 and 2 it will be seen
that the present invention allows the use of substantially
parallel head tubes 21 in the operative position.
This
enables the head tubes to lie in a compact folded position
as shown in FIG. 4.
Such construction is not seen in
the conventional stethoscope shown in FIG. 1 where the
3
4
head tubes are bowed in at the location of the ?at Spring
to avoid a prohibitively large ?at spring.
When the operator, such as a doctor, uses this improved
stethoscope, it will be in the position‘ shown in FIG. 2.
The ear pieces 22 are placed in ‘the ear, and the listening
device 24 is placed against the object to be listened to.
to force the ear pieces toward each other, said head tubes
In this position the spring 33 is extended in a biased condi
tion and tends to pull the ear pieces 22 toward each other.
being foldable past each other about said double pivot
points into longitudinal superimposed alignment with
each other.
2. A foldable stethoscope having a pair of head tubes
connected to ?exible tubing terminating in a listening de
vice, each head tube having a curved end on which is
‘mounted an ear piece, the remainder of each said head
This maintains the stethoscope in‘ place around the opera
tor’s head. When the stethoscope is not being used,
the spring tension will force the ear pieces 22 and the
having ‘a pair of spaced pivot points longitudinally lo
attached head tubes 21 further toward each other, and
the head tubes 21 thereupon fold over each other into
neoted with the stethoscope in open position between the
the position shown in FIG. 4. The folding of head tubes
21 is ?rst effected by the ear piece ends moving past
each other. This is possible due to their remote location
from the double hinge pivots which provide sufficient
relative transverse movement to allow the passage.
It
tube being substantially straight, a ?ange mounted adja
cent the other end of each said head tube, each ?ange
cated with respect to said head tubes, a ?rst bar con
one pivot point nearest the ear piece on one ?ange to the
one pivot point farthest from the ear piece on the other
?ange, a second bar connected ‘between the one pivot
point nearest the ear piece on said other ?ange to the
one pivot point farthest from the ear piece on said one
will be appreciated from the showing in FIG. 4 that when
?ange, said bars spaced in parallel relation to each
the head tubes 21 are completely folded, ?anges 2.5, 25 20 other along their entire length and concavely shaped
become slightly offset with respect to each other to allow
with respect to said said ear pieces, and biasing means
for this folding. It is understood that such passage
connected ‘between said ?anges to force the ear pieces
and oifset is further provided for by the usual built-in
toward each other, said biasing means comprising a spring
spring or “give” of the type of metal used in stethoscope
having one end attached to one end of the ?rst bar and
devices of this nature. In the FIG. 4 position it is seen
that the entire head tube assembly occupies a minimum
space. This will be seen by comparing the height of the
assembly in FIG. 4 with the height of the same assembly
in FIG. 2. Since the rubber tubing 23 and listening de
vice can be folded up alongside the head tube assembly,
it will be seen how the entire stethoscope can easily ?t
into the pocket of the user or be place in a minimum
storage space.
Accordingly, it is seen that an improved stethoscope has
been described which is e?icient in use and foldable by
a double hinge assembly into a compact assembly when
not in use.
its other end attached to the opposite end of the second
bar, said head tubes being foldable past each other about
said double pivot points into longitudinal superimposed
alignment with each other.
3. A foldable stethoscope having a pair of head tubes
connected to ?exible tubing terminating in a listening
device, each head tube having a curved end on which is
mounted an ear piece, the remainder of each said head
tube being substantially straight, a ?ange heing adjustably
clamped adjacent the other end of each said head tube,
each ?ange having :a pair of spaced pivot points longitu
dinally located with respect to said head tubes, a ?rst
bar connected with the stethoscope in open position be
The particular embodiment of the invention illustrated
tween the one pivot point nearest the ear piece on one
and described is to be considered illustrative only. The
?ange to the one pivot point farthest from the ear piece
present invention includes such other modi?cations and
on the other ?ange, a second bar connected between the
equivalents as may readily occur to those skilled in the
one pivot point nearest the ear piece on said other ?ange
art, within the scope of the appended claims.
to the one pivot point farthest from the ear piece on said
It is claimed and desired to secure by Letters Patent:
one ?ange, said bars spaced in parallel relation to each
1. A foldable stethoscope having a pair of head tubes
other along their entire length and concavely shaped
connected to ?exible tubing terminating in a listening de 45 with respect to said ear pieces, and biasing means con
vice, each head tube having a curved end on‘ which is
nected between said ?anges to force the ear pieces toward
mounted an ear piece, the remainder of each said head
each other, said biasing means comprising a spring hav
tube being substantially straight, ‘at ?ange mounted adja
ing one end attached to one end of the ?rst bar and its
cent the other end of each said head tube, each ?ange
having a pair of spaced pivot points longitudinally located
other end attached to the opposite end of the second bar,
said head tubes being foldab-le past each other about said
with respect to said head tubes, a ?rst bar connected with
the stethoscope in open position between the one pivot
ment with each other.
point nearest the ear piece on one ?ange to the one pivot
point farthest from the ear piece on the other ?ange, a
second bar connected between the one pivot point nearest 55
the ear piece on said other ?ange to the one pivot point
farthest from the ear piece on said one ?ange, said bars
spaced in parallel relation to each other along their en
tire length and concavely shaped with respect to ‘said eiar
pieces, and biasing means connected between said ?anges
double pivot points into longitudinal superimposed align
References Cited in the ?le of this patent
UNITED STATES PATENTS
348,120
1,466,825
Gaslcins _____________ __ Aug. 24, 1886
Foord _______________ __ Sept. 4, 1923
580,594
Germany ____________ __ July 13, 1933
FOREIGN PATENTS
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