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Патент USA US3029838

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April 17, 1962
1. H. KRAVITT
'
3,029,828
CANES FOR BLIND PERSONS
Filed Dec. 27, 1960
-
INVENTOR.
IRWIN HERBERT KRAVITT
BY
ATTORNEY.
r,
United States Patent
1C6
3,029,828
Patented Apr. 17, 1362
1
2
3,029,828
The cane body 11, at a predetermined distance from
the lower end 14, is provided with a bracket plate 18 se
CANES FOR BLIND PERSONS
Irwin Herbert Kravitt, _8 S. 46th St., Philadelphia, Pa.
Filed Dec. 27, 1960, Ser. No. 78,527
3 Claims. (Cl. 135—47)
cured thereon in any desired manner, such as by screws
19. The bracket plate 18 is preferably located at a se
5 lected distance from the lower end 14.
The plate 18 has a lower marginal edge 20 which with I
It has heretofore been proposed to provide canes for
blind persons to aid such persons in their advancing
movement along a sidewalk or the like.
The canes for blind persons heretofore available were 10
limited in'their capabilities in‘ that while they furnished
to the blind person informaiton as to the horizontal sur
face along which such person was moving, they did not .
I
.7
manual manipulation.
The attachment 25 employed in connection with the
present invention preferably includes a lever 26 pivotally
connected at one end thereof by a pivot pin 24 to the
free end 13 of the curved handle portion 12 on one side
furnish any information as to possible obstructions above
the surface.
a portion of the body 11 of the cane 10 of measured
length therebelow, can be employed to determine the
depth of a step, curb or the like, in a simple manner-by
15
thereof.
,
,
It is the principal object of the present invention to
The lever 26 is preferably held against sidewise dis,
provide a cane for blind persons, and more particularly
to an attachment suitable for use with canes now avail
' placement with respect to the handle portion 12 by a
able, with which additional information as to freedom
guide arm 27 longitudinally disposed on the cane body
11 and held in position by end screws 28 and in space
of movement or obstructions is available to the blind 20 relation by spacing collars 29.
‘
person in advance in the direction in which he is travel
i The lever 26 preferably has slidably mounted'thereon'
ling.
-
I
>~
-
the body portion 30 of a ?nger ‘grip 31 with an‘ ‘opening
32 for the insertion of'one ofthe ?ngers of the user to’
facilitate manipulation of the lever 26 for purposes to be
It is a further-object of the present invention to provide
a cane for blind persons having provisions for determin
ing not only the condition of the ground surface, but also
the presence of elevated objects.
It is a further object of the present invention to provide
explained.
a cane for blind persons having an attachment for in
creasing the usefulness of the guiding cane now com
body portion 30, can be provided for normally urging
A spring 33 engaged at one end on a pin 34 on the
lever 26 and at the other end on a holding pin 35 on the
the body. portion 30 to a position where it provides a
monly employed by blind persons.
30 minimum of obstruction of the space within the curved
It is a further object of the present invention to provide
handle portion 12.
a cane for blind persons, the lower end of which is freely
The lever 25 preferably has pivotally mounted on one I
movable along a paved or other surface of generally
end thereof by a pivot pin 36, a detector or feeler arm
horizontal character, together with a manually operable
37, preferably of light weight metal. The feeler arm 37
auxiliary detecting device so that the space in front of K at its free end can be provided with an enlarged and
the blind person and above such surface can be explored
rounded end 38.
while the blind persons is advancing.
A positioning spring 42 is provided connected at one
It is a further object of the present invention to pro
end to a mounting pin 41 carried on the lever 26 and
vide a cane for blind persons having an auxiliary detector
connected at its opposite end to a slidable block 42 hav
feeler selectively positioned as desired, and which can
be collapsed, when not in use, to a position to occupy
only a small space in addition to that normally occu
pied by the cane.
The nature and characteristic features of the inven~
tion will be more readily understood from the following 45
ing enlarged end heads 43 and 44 and movable to oppo
site positions along a slot 45 provided in the arm 37.
It will be noted that the slot 45 extends above and
below the location of the pivotal connection of the arm
description, taken in connection with the accompanying
drawings forming part thereof, in which:
FIGURE 1 is a side elevational view of a cane for
1 ,4
blind persons in accordance with the invention;
FIG. 2 is a fragmentary elevational view,tenlarged, at
the upper end of the cane;
FIG. 3 is a fragmentary sectional view taken approxi
mately on the line 3-3 of FIG. 2; and
FIG. 4 is a view similar to FIG. 2 showing the col-.
lapsed position of the feeler arm.
It should, of course, be understood that the descrip
tion and drawings herein are illustrative merely, and that
various modi?cations and changes can be made in the
37 to the lever 26.
'
' The spring 40, in the position shown in FIGS. 1 and 2
tends to urge the arm 37 to a position in which it is in
clined with respect to the lever 26 so that upon move
ment of the lever 26, the free end 38 of the arm 37 is
moved towards and away from the body 11 of the cane
10 sweeping above the level at which the wheel 15 is
located and can be moved with a sweeping or exploring
motion, as desired, by selective movement of the lever 26.
The spring 40, upon movement of the block 42 to the
opposite end of the slot 45 urges the arm 37 to a position‘
close to the body 11 of the cane 10, so that the space
occupied by the cane 10 and its attachment is reduced,
this being particularly advantageous when traveling upon‘
public vehicles where the detector arm 37, if extended,
structure disclosed without departing from the spirit of
might contact other persons or the vehicle.
60
the invention.
The mode of operation is thought to be apparent from
Referring now more particularly to the drawings, in
which a preferred embodiment of the invention is illus
trated, a cane 10 having a body 11 of conventional shape
is provided. The body 11 preferably has integral there
the foregoing, but it may be noted that with the block 42
at the upper end of the slot 45, the person using the cane
10 may insert a ?nger in the opening 32 of the body por
with and extending therefrom, a curved handle portion 65 tion 31 and as the Wheel 15 advances along the ground,
the user can thensweep or explore the space above the
12 terminating at a free end 13.
cane 10 with the ‘detector arm '37 to ascertain whether
The cane body 11 is preferably provided, at its oppo
there are obstructions which would not be revealed by the
site or lower end 14 with a Wheel or caster 15 pivotally
lower end of the cane 10 in its movement along the
mounted in a wheel frame 16 which is attached to the
lower end 14 of the cane body 11. The wheel or caster 70 ground.
Upon reaching a sharp drop in the surface, such as at
15 is preferably freely rotatable on an axle 17 carried in
a step or curb, indicated by the movement of the wheel
the frame 16.
3,029,828
15, the distance of the surface therebelow may initially
be investigated by sliding the cane downwardly over the
edge of the surface of the step or curb. This may sug
gest that the drop is greater than that indicated by the
position of the bracket plate 18, while if the plate 18 does
not engage the surface of the step or curb, then a lesser
drop will be indicated to the user.
I claim:
1. A cane assembly for blind persons comprising a
4
which said lever is movable for limiting the sidewise
movement of said lever, said lever having another end
portion, an elongated detector arm pivotally connected
contiguous to one end thereof to said other end portion,
said detector arm having at said one end thereof a por
tion with a slot extending above and below said lever, a
positioning block seated in and movable along said slot,
and a resilient member connected to said positioning block
and to said lever, said block in one position being freely
cane having a body portion With a curved handle at its 10 swingable upon movement of said lever and in another
position holding said detector arm in an inactive position.
upper end and a lower terminal end, a lever pivotally
3. A cane attachment as de?ned in claim 2 in which a
secured at one end to the end of the handle and extending
in bridging relation to the handle and having its other
end beyond the body portion, a guide member for said
lever secured on the exterior of the body portion, a de 15
tector arm pivotally mounted on said other end of said
lever, said arm having a portion with a slot extending
above and below said lever, a positioning block slidably
mounted in said slot, and a resilient member connected
at one end to said positioning block and at the other end 20
to said lever for controlling the positioning of said de
slidable ?nger grip is provided on said lever, and a re
tracting spring is connected to said grip and to said lever.
References Cited in the ?le of this patent
UNITED "STATES PATENTS
1,624,591
Fleming _____________ __. Apr. 12, 1927
1,905,076
2,346,038
Van Sciver ____________ _ \Apr. 25, 1933
Mason ______________ __ Apr. 4, 1944
11,219
Great Britain _________ __ July 1, 1891
tector arm.
FOREIGN PATENTS
2. An attachment for connection to a cane having a
straight body portion and a curved handle comprising a
lever having an end portion with an opening for a pivotal
connection to the cane handle, a guide member along
551,170
Canada ______________ __ Ian. 7, 1958
907,661
France ______________ __ July 9, 1945
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