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Патент USA US2107629

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Feb. 8, 1938.
_
c. H. DALLAS
Filed Jan. 12, 1937
QM
w. 7%
2 Sheets-Sheet l
INVENTOR:
WITNESSES:
.
2,107,629
ADJUSTABLE CHAIR LEG EXTENSION
Emszfanm i?pirins Dallas,
BY
Feb. 8, 1938.
I
c‘ H DALLAS
2,107,629
ADJUSTABLE CHAIR LEG EXTENSION
Filed Jan. 12, 1957
FIG: Y.
2 Sheets-Sheet 2
'
WI TNESSES .~ .
W a], W
1 N VEN TOR .
.
Cansifanaz i’?pirms Dallas)
BY
Patented Feb. 8, 1938
2,107,629
-UNITED STATES PATENT OFFICE
2,107,629
ADJUSTABLE‘ CHAIR. LEG EXTENSION
Constance Hopkins Dallas, Chestnut Hill, Pa.
Application January 12, 1937, Serial No. 120,204
7 Claims.
My invention relates generally to adjustable
attachments for use on various articles of furni
ture and more particularly to adjustable exten
sions for chair legs.
5 ' ~The use of the conventional high chair is at
tended with certain disadvantages. A high chair
‘ at table with the family is awkward. It generally
does not match other articles of furniture; it
does not lend itself to being drawn closely to
loiithe table; and it usually necessitates the incon
venience of a tray. Moreover, there are inter
mediate stages where children are too large for
the average high chair yet not tall enough for
chairs used by adults; and the customary prac
15‘ tice of using cushions, books or other articles on
the seat of a chair for elevating the occupant to
the desired height often results in discomfort.
Such a makeshift arrangement is not conducive
to good manners or posture and is a distinct
‘20' handicap to the child receiving his ?rst lessons
on behavior at table.
The principal object of my invention is to
overcome the above difficulties by providing an
' adjustable chair leg extension which is simple
25 in structure and operation and may be easily ap
plied, removed, or adjusted, as occasion demands,
with respect to any of the usual dining room or
straight chairs found in the home. I am aware
that other adjustable chair leg extensions are
30 suggested in the prior art, but their intricacy and
lack of capacity for easy application to- the aver
age chair make them unsuitable for general use
in the home. Furthermore, the devices hereto
fore suggested or employed are either unstable or
35 so elaborate and expensive to manufacture as to
be impracticable, whereas the device of this in
vention is characterized by extreme simplicity
and economy of manufacture and at the same
time possesses adequate ruggedness and dura
40 bility, and when removed leaves the chair in its
original useful condition.
Other objects and advantages of my invention
will become more apparent from the following
detailed description of one example of the inven
45 tion and a modi?cation thereof, reference being
had to the accompanying drawings. Of the
drawings:
(Cl. 155-88)
ment, showing also the felt protector associated
therewith.
Fig. IV represents a cross section, taken as in
dicated by the lines IV—-IV of Fig. III.
Fig. V represents a side view of the foot portion
of the extension member.
Fig. VI represents a perspective view of the
holding element which is attached to the chair
leg end, showing the spur which sinks into the
chair leg.
10
Fig. VII represents a cross section, taken as
indicated by the lines VII-VII of Fig. II; and,
Fig, VIII represents a cross section similar to
that of Fig. VII, but showing a modi?ed form of
clamping means comprising a rolled metal strip
instead of the collars shown in Figs. I and II.
With particular reference to Figs. I and II of
the drawings, there is shown a conventional chair
I having legs 2, to each of which is applied an
adjustable attachment of my invention. Each
such attachment comprises generally an exten
sion member 3, a holding element 4 secured to
the end of the chair leg 2, and clamping means
in the form of collars 5. There is desirably inter
posed between the extension member 3 and the
chair leg 2, and between the collars 5 and the
chair leg 2, a protective cushion of felt or like
material as indicated at 6.
The extension member 3 is shown most clearly
in Fig. III. It comprises in its preferred form a
bar of metal having vertically spaced slots 1
15
20
25
30
therein, the bar being curved transversely
throughout its length to conform to the curva
ture of an ordinary chair leg. At its lower end,
the extension member 3 has a rounded foot 8, 35
an enlarged view of which is shown in Fig. V.
The curvature of the foot 8 is of particular ad
vantage where the chair legs are inclined at an
angle to the vertical, in which case it affords a
substantial surface contact with the floor. At its 40
upper end the extension member 3 has grooves 9
in the outer surface which are designed to ac—
commodate the collars 5 with a snug ?t.
The felt protector 6 comprises a strip generally
conforming to the shape of the extension mem- 45
her 3 and having holes I!) therein which register
with the holes '3 of the extension member, and it
Fig. I represents a perspective view of a con
includes additionally a split cylindrical portion
ventional chair with attachments embodying my I2 which surrounds the chair leg 2 within the
50 invention applied thereto.
collars 5. In an obvious manner the use of such 50
Fig. II represents an enlarged side elevation of 'a protector permits the attachment to be applied
one chair leg, partially in section, showing de
and removed or used over a long period of time,
tails of one such attachment.
all without injury to the chair.
Fig. III represents a further enlarged perspec
The holding element 4, as shown most clearly
55 tive view of the extension member of the attach
in Figs. II and VI, comprises generally a disc por- 55
2
2,107,629
tion l3 and a hook portion l4. Within the disc
‘portion l3 there is a countersunk aperture l5
through which a screw I6 is inserted for securing
the holding element to» the end of the chair leg
2. Additionally the disc portion I3 is provided
with an upstanding spur II which sinks into the
end of the chair leg and prevents the holding ele
ment from turning about the leg end. The hook
portion l4 projects upwardly and laterally and is
adapted to engage selectively ‘any one of the
holes ‘I in the extension member 3, the engage
ment being such as to hold the extension member
firmly against the bottom end of the chair leg 2.
The collars 5 are shown most clearly in Figs.
II and VII.
Each collar 5 is constructed of rela
tively resilient material and has ?anged ends l8
secured together. by means of a screw l9 andnut 20.
The collars 5 may be adapted to ?t chair legs of
various shapes and sizes. Inasmuch as they ?t
20 Within the grooves 9 of the extension member 3,
the collars 5 are held against displacement and
prevented from sliding with respect to the chair
leg 2.
‘
In Fig. VIII of the drawings, there is shown a
,modification of the invention in which rolled
metal bands 5a are employed in lieu of the col
lars 5. Each such band comprises a continuous
strip with one end 5?) bent around the extension
member 3 at one of the slots 1. The strip is
30 ,
then passed around the chair leg 2 exteriorly of
the cylindrical portion l2 of the felt protector.
vention may be applied to other articles of fur
niture in addition to chairs, all without depart
ing from the spirit of the invention as de?ned
in the annexed claims.
Having thus described my invention, I claim:
1. In combination with a leg for a chair or
the like, an extension member having vertically
spaced slots formed therein, and adapted to be
selectively engaged, a holding element having
a down-turned hook and attached to the leg end, 10
said ~ hook
engaging
said extension
member
through one of said slots and holding it against
said leg, and adjustable clamping means secur
ing‘ the upper portion of said extension member
against said leg.
‘
15'
I
2. The invention of claim 1 characterized by
the further fact that there is a protecting cush
ion between said leg and said extension member
and between said leg and said clamping means.
3. In combination with a leg fora chair or 20
the like, ‘a, transversely curved ‘extension member
having vertically spaced slots formed therein and
a rounded foot formed on the end thereof, a pro
tecting cushion attached to the inner side of said.
extension member and engaging‘said leg. said
protecting cushion being formed substantially to
encircle said leg atfthe top of the extension,
member and having openings formed; therein to;
correspond with said slots, clam'pinggmeans se_-_>
curing the upper portion ofv said extension‘memw 30,-i
ber to the legand being separated from the leg
Desirably the stripis passed twice aroundjthe ‘ by said upper part of ‘said, protecting, cushion,
leg in the manner clearly illustrated in the draw ' and holding means'screwed, to the, legxendysaid ,
ings, with the free end 50 ultimately drawn taut holding means, having a spur to engage, said; leg
.' ,and rolled and swaged into the slot opening '1. end and consisting, of a disc portion ?tting over 351
Such an arrangement ?rmly clamps the exten
the leg end and 'a hook portion, said hook_por—_
sion member 3, and it has the advantage that
tion extending upwardly wherebyvit is, clear. of'
the floor when said disc portion rests on the ?oor.
it can be used on chair legs‘oi different cross
sectional shapes. Also, this form of adjustable,
4. In combination with ,a leg for a chair or the
like, an’ extension member, havingv vertically 49. .
4Ov clamping means presents a very neat appear
" ‘ ance, particularly in view of the fact that the
45,,
spaced slots formed therein, and adapted to be
rolled end 50 may be housed within the 'slot 7
selectively engaged, said extension member hav
in such manner that there are no unsightly pro
ing a rounded foot and’ being curvedtransversely,
jections.
to'?t against said leg, a holding element attached
to the leg end and engaging said extension mem 45;
'
From the above description it will be apparent
that the attachments of, my invention may be
readily applied to and removed from the legs of
diiferent kinds of chairs. Moreover, one special
ber through one of _ said slots and ' holding it
against said leg, and adjustable clamping, means,
securing the upper portion of. said extension
advantage is that the holding element 4 may be
permanently applied to the leg ends of a chair,
member against said leg. ,
and when it is desired to elevate the chair, the,
like, an extension member having vertically
extension members 3 and clamping means 5 or,
50, may be quickly attached. In this connection
it will be noted that the hook portion M oi” the.
, holding element 4 is so constructed that it ex
' “tends clear of‘ the ?oor when the disc portion I3
rests on the floor.
.
Although the constituent elements comprising
the adjustable attachments of this invention are
co, extremely simple and may be produced at a low
‘ manufacturing cost, the attachments are never
theless very efficient in operation and possess
adequate stability. One important factor in pro
ducing such stability is that the extension mem
bers 3 are held ?rmly against the side of the chair
‘leg both at the upper portion where the clamping
5. In combination with aleg fora ehairor the, 50.
spaced slots formed-therein, and adapted to be
selectively engaged,’ a holding element attached,
to the leg end and engaging, said extension mem
ber through one of said slots and holding it,
against said leg, said holdingielement having a,
spur which is sunk’ into the legend to keep said.
holding element from turningmabout the legend,
and adjustable clamping means securing the
upper portion of said extension member against :60.
said leg.
‘
'
'
’
6. In combination with a leg for a chairor the‘
like, an extension member, having vertically
spacedyslots formed therein, and adapted, to be.
selectively engaged, a;holding__ element attached, 65
to the leg end and engaging said, extension meme .
means are employed and at the bottom of the ' ber through one of said slots and holding-it,
70.
leg where the holding element with its hookpor-v
against said leg, said holding element including
tion tightly grips the extension'member 3.
a flat disc for ?tting on the leg end, and an 8H9.
While I have described my invention with ref
erence to one example, showing, however, two
types of adjustable clamping means, it will bev
gaging hook extendingup. from .said ?atdisc, .70
whereby the normal use ofthe'leg is not impaired
when the extension member is removed, and ad-.
apparent that numerous changes or modi?cations _ justable clamping means securing the- upper
may be made in the form of the attachments portion of said extension. memberagainst said
and. the various, parts thereof; and that. the _in—
leg‘
<
r
._
.
2,107,629
7. In combination with a leg for a chair or the
like, an extension member having vertically
spaced slots formed therein, and adapted to be
selectively engaged, a holding element attached
to the leg end and engaging said extension mem
ber through one of said slots and holding it
against said leg, and adjustable clamping means
securing the upper portion of said extension
3
member against said leg, said clamping means
consisting of a metallic tape wrapped around the
leg and through one of said engagement slots
and a rolled end swaged into the slot opening
provided by the thickness of the extension mem- 5‘
her.
CONSTANCE HOPKINS DALLAS.
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