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Патент USA US2383321

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Aug. 21, 1945.
2,383,321 ’
Filed March 2, 1944 -
I "3
5y’ i
Linc/(SON 0. [Qt-551?.
Patented Aug. 21, 1945,
Jackson 0: Kieber, Long Island City, N. Y. \
Application March 2, 1944, Serial No, 524,724
2 Claims.
("'01. 177-s11)
This invention relates to weighing apparatus
adapted for operation by the blind, or without ’
accurately whether the weight is approaching or
exceeding the desired amount, or is correct.
' The use of high‘ and low notes respectively to
the aid of sight.
In the packaging of predetermined amounts of '
signify high or low weights, prevents any danger
' material or predetermined numbers oi small ar- <
of confusion, mistake or misunderstanding of the
ticles, it is often convenient to determine by weight
the desired quantity to be placed in each package.
signals, particularly when the weight is nearly
Where the conditions are such that the packaging
may be economically done manually, the operation
is one which is well adapted to be performed by "
the blind, except that so far as I am aware.v no
weighing apparatus has heretofore been available
in a form adapted to be rapidly and accurately
used by the blind.
correct and the signals are of. low intensity.
Various further and more speci?c objects, fea
tures and advantages will more clearly appear
from the detailed description given below taken
in connection with the accompanying drawing
which forms a part of this speci?cation and illus
trates somewhat schematically by way of exam
ple, a preferred form of the invention. The in
vention consists in such novel features, arrange
ments and combinations of parts as may be shown
and described in connection with the apparatus
In accordance with the present invention I have
solved this problem by providing a photoelectric,
‘cell and loud speaker arrangement accompany
herein disclosed.
ing the weighing balance or scales and adapted
In the ?gure, weighing scales are schematically
to sound high or low audible frequency signals
respectively when the weight indicated by the 20 indicated at 5, having a pointer as at 6 for co
operating with a graduated dial as at ‘I. These
scales is higher or lower than the predetermined
scales may be of any suitable known type or may
desired value, the signals also if desired being of
be in the form of weighing balances‘ having
' a loudness indicative of the degree of over or
under weight.
With this arrangement it has been found that
a blind person with very little practice is able to
operate the weighing scales or balance in very
rapid succession for accurately weighing prede
weighing pans, etc. A shutter member as at 8
‘may be aflixed to the pointer 6 for cooperating
with light apertures as at 9, l0,_ these apertures
being ?ooded by light as from lamp bulbs l I and
i2. The lamp i I may be connected for example
termined‘ quantities of material or eifectively 30 with a suitable source of power included within
an oscillator i3 which is arranged to cause varia
counting small articles to be packaged._ For ex
tions in the lighting current, say at a frequency
ample, the arrangement is being used by the blind
of 1000 cycles per second. Similarly, the lamp
in counting out predetermined numbers of phono
I! may be connected to be lighted from another
graph needles or the like, which are to be packaged ' oscillator i4 adjusted to cause variations in the
in envelopes. In this operation the photoelectric - illumination of the lamp I! at a lower frequency,
cell arrangement may be set to cause a relatively
say of 500 cycles.v
low audible frequency note to be sounded from
The apertures 9 and i0 may be formed in a
the loud speaker when the balance pan is empty.
stationary plate or shield member as at IS, the
Then as the needles or other articles are dropped
position of which may be manually adjusted if
on to the weighing pan, and as the number of 40 desired as by turning a knob l6 having threaded
articles approaches the desired predetermined
connection means as at I‘! with the member [5.
number for one package, the signal may be ar
An elongated photoelectric cell as at iii may be
ranged to decrease in intensity, and thus give a
suitably mounted above the shutter member 8 and
warning just as the number of articles on the
connected through an audio ampli?er is of known
weighing pan is about to approach the predeter 45 type to a loud speaker 20.
mined number for one packageful. When the
In the operation of the arrangement the aper
‘ predetermined number is reached, the arrange
ture plate or shield member I! is ?rst adjusted
ment may be such as to give no signal, and when
toia position such that shutter -8 will close both
the number becomes excessive, then a relatively
apertures 9 and to when the scales or balance
higher audible note begins to sound with an in 50 pointer is indicating a predetermined desired
weight. The drawing shows the parts in this
tensity depending upon the amount or number in
condition. vAt this time neither of the two oscil
excess. Thus the psychological eii’ect of the low
lator frequencies will be heard in-the loud speak
and high frequency notes and the degree of in
er, since the light from the two lamps will be
tensity thereof when the weight is nearlycorrect,
allows the blind person to gauge very quickly and 55 shielded by the shutter 8 from reaching the pho
toelectric cell. However, if the pointer indicates
‘ made without departing from the spirit and scope ‘
of the invention, and it is intended therefore in
the appended claims to cover all such changes
amount, than the variations from the lower audi
and modifications.vv
ble frequency oscillator will be heard, since light
What is claimed as new and desired to be se
from lamp i2 will be impinging upon the photo
cured by Letters Patent is:
electric cell, It is apparent that the intensity
1. Weighing apparatus adapted for operation
of the audible frequency note then heard will
depend upon the proportion of the aperture it
by the blind, comprising in combination, weigh
ing scales having a movable member for indicat_ ,
which is uncovered by the shutter. Thus, as the
aperture becomes nearly covered, viz., as the 10 ing the weight, alight shutter member carried by
said indicating member, a relatively ?xed shut
weight indicated closely approaches the desired
ter member cooperating therewith, one of said
predetermined amount, the intensity of the low
shutter members having two apertures positioned
frequency note will correspondingly diminish
to be both covered by the other shutter member
until no note is heard when the pointer indicates
the predetermined desired amount. Then if a 15 when a predetermined weight is indicated, and to
be alternatively uncovered respectively when a
slight excess quantity of material is placed on the
higher or lower weight is indicated, means for
scales, aperture Q will be uncovered to a corre
illuminating said apertures respectively with light
sponding degree resulting in a 1000 cycle note in
having relatively high and low frequency varia
in the loud speaker due to the light from lamp
ii. If a certain degree of tolerance is permissi 20 tions, and means responsive to such light passing
a value lower than the predetermined desired
ble above or below the desired predetermined
weight, the shutter 8 may be lengthened corre
spondlngly so as to prevent any audible note oi.’v
through said apertures for providing audible sig
either frequency, whenever the weight indicated
in excess of or less than the desired predeter
nals of corresponding high and low frequencies,
whereby when the material on the scales weighs
25 mined weight, the higher or lower frequency‘ sig
is within the tolerance limits.
nals respectively will sound.
The lamps H and 12 may be of a miniature
2. Weighing apparatus adapted for operation
?lament type. While the intensity of the light
without the aid of sight, comprising in combina
from the ?laments, due to inertia of the heat
tion, weighing scales having a movable member
ing and cooling effect therein will not vary di
rectly in accordance with the oscillator current, 30 for indicating the weight, a light shutter member
carried by said indicating member, a relatively
yet there will be suillcient variation in the light
?xed shutter member cooperating therewith, one
intensity and consequently in the photoelectric
of said shutter members having two apertures
cell current as to give a soft readily audible note
positioned to be both substantially covered by the
from the loud speaker at either of the two fre
quencies. In using the scales steadily, such‘a 35 other shutter member when a predetermined
weight is indicated, and to be alternatively un
soft audible note is found desirable to avoid an
covered to varying degrees corresponding to high
noyance and mental iatigue. The blind person
er or lower weights respectively, means for illu~
may quickly test the arrangement to determine
minating said apertures respectively with light
whether it is in operative condition, by applying
pressure to the weighing pan su?icient to cause 40 having relatively high and low frequency varia
tions, and means responsive to such light pass
the pointer to move from the low weight region to
ing through said apertures for providing audible
the high
position, and vice versa.
signals of corresponding high and low frequen
With very little practice it has been found that
cies and of a volume generally corresponding to
a blind person using the above described arrange
ment is able to package small quantities or num 45 the extent that the apertures are uncovered,
whereby when the material being weighed ex
bers of articles at least as accurately and rapidly
ceeds or is less than the desired predetermined
as if the scale pointer were visible to the operator.
amount, the high or low frequency signals reWhile the invention has been described in de
spectively will sound with a loudness indicative
tall with respect to a particular preferred example, it will be understood by those skilled in the 50 of the amount of the over or under weight,
art after understanding the invention, that vari
ous changes and further modi?cations may be
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