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Патент USA US3078097

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Feb- 19, 1963
w. K. RIEBEL ET AL
3,078,087
COMBINATION BRACE BAR AND SPRING ELEMENT
Filed Nov. 1'7, 1959
2 Sheets-Sheet 1
Feb- 19, 1963
w. K. RIEBEL ET AL
3,078,087
COMBINATION BRACE BAR AND SPRING ELEMENT
Filed NOV. 17, 1959
‘
2 Sheets-Sheet 2
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1
3,078,087
COMBKNATION BRACE BAR AND SPRING
,
ELEMENT
William K. Riebel and Fred J. Riebel, Chicago, 111., as
stgnors, by mesne assignments, to Kay Manufacturing
Corp, Brooklyn, N.Y., a corporation of New York
Filed Nov. 17, 1959, Ser. No. 3,704
6 Claims. (Cl. 267-110)
‘
3,078,087
Patented Feb. 19, 1963
2
tioned diagrammatic view illustrating the relationship be—
tween the end member and tubular center portion of the
brace bar in the initial stage of assembly.
FIG. 6 is a front elevation illustrating partially diagram
matically the method of assembling the convoluted spring
_ in the subject brace bar.
FIG. 7 is a top view of the same diagrammatic assem
bly illustrated in FIG. 6 showing in an exploded and
diagrammatic manner the sequential relationship between
The present invention relates to a brace bar. While 10 the end portion of the brace bar and the free end of the
other applications may prove advantageous, the primary
application of the subject brace bar, lies in the furniture
convoluted spring.
or bedding applications thereof, and more particularly to
FIG. 8 is an end view and enlarged section of the end
portion of the brace bar as shown in FIG. 7 showing in
that type of unit which requires ruggedness ‘and durability
dotted lines the sequential stages of upwardly curving the
with an inherent low manufacturing cost.
15 same to reversely bend the end of the convoluted spring
The present invention contemplates a combination __ with relation to the end of the brace bar.
spanner and support which is advantageously formed of
three pieces, the mid-section permitting variations in length
FIG. 9 is a front elevation showing the subsequent rela
tionship of the second end of the brace bar immediately
prior to assembling the two ends with the base tubular
with standard end portions. In addition, the present in
vention relates to a pro-stressing of the convoluted spring 20 member.
FIG. 10 is an enlarged partially broken perspective
in a manner to change the arcuate con?guration thereof,
and further enhance the yieldable nature of the spring
view of the assembled relationship between the end of the
reversely bent convoluted spring and the end of the brace
and its seating characteristics. The manufacturer is en
bar and its related fastening portion.
abled to manufacture the combination spring support and
spanner to preselected lengths for custom styled furniture 25
In FIG. 1 it will be seen that the brace bar spring as
and other applications where varying sizes are required,
without the attendant disadvantage of fabricating a wide
variety of moulds and storing different length spanners.
traverse the inner portion of a seating frame ‘11 and be
secured thereto by means of nails or other fasteners which
With the foregoing in mind, it will become apparent
that it is the general object of ‘the present invention to
provide van improved brace bar and an improved con
voluted spring, which are superior to any heretofore
of the assembled brace bar 14. Thus when the manu
facturer assembles the brace bar spring assembly to the
known or disclosed in the art.
More speci?cally, with regard to the brace bar, it is an
object of the present invention to furnish ‘brace bar con
semblies 10 are of a pre-selected length so that they can
pass through the mounting tabs 12 provided at each end
frame 11, they need only be placed in position along the
general pathway shown in the dotted lines in FIG. 1, and
nails or other fasteners driven through the mounting holes
15 (see FIG. 3), thereby completing the assembly. The
struction for use with a convoluted spring having reverse~
convoluted spring 16 is of the type having straight cross
ly bent ends which is readily susceptible of inexpensive
conversion to varying lengths ‘by the manufacturer for
custom assembly and various types of seating require—
bars connected by edge loops alternating at opposite edges
of the spring. Because the convoluted spring 16 does
ments. A related object of the present invention is to pro
not exert its force against the’ edges of the upholstery
frame 11, a lightweight assembly may be employed for
vide a brace bar or other suitable frame element for use
the upholstery frame. The steps of nailing mounting
with a convoluted spring having reversely bent end por
tabs for the convoluted spring and the like are complete
ly eliminated, and also completely eliminated are torsional
tions, which bar utilizes the strength, ruggedness, dura
bility, and economy of tubular construction throughout.
Still another object of the present invention relates to a
stresses and unusual loads along the sides of the frame.
When the completed upholstery unit is used, any load
placed on the top such as sitting down quickly will be
brace bar of‘the character contemplated in which the
transmitted'directly into a downward force on the mount
manufacturer requires only one standard part in the form
ing tabs 12, as distinguished from lateral forces which
of a pre-formed elbow member, all of the remaining parts
might be experienced were not the subject brace bar por
being susceptible of development from standard stock
equipment kept by the manufacturer at the job site.
50 tion 14- present to absorb such stresses. It follows as a
corollary to the foregoing that the reaction to seating
The assembled brace bar with its convoluted spring
loads will be uniform from each of the brace bar spring
reversely bent with a reentrant V at its end portion has
as its general object a utilization of the inherent pre
stressed forces within the spring to seat and securely lock
assemblies inasmuch as variations in the flexibility of the
seating frame 11 are not transmitted to the convoluted
the three separate elements together.
spring 16.
In the drawings, FIG. 1 is perspective partially explod
ed partially diagrammatic view illustrating an upholstery
quality feel and experience factor, but without the exces
sive costs normally associated with furniture and seating
frame to which the subject brace bar and assembled con
constructions achieving an equivalent action.
voluted spring are to be a?ixed for subsequent develop
ment into a bed or other seating application such as a
Turning now to FIG. 4, it will be seen that each brace
‘bar portion 14 of the brace bar spring assembly 10 con
sofa.
templates as a principal element an elbow 20 with a re
FIG. 2 is a front elevation of the illustrative brace bar
The result is a piece of furniture with a
\
duced cylindrical coupling portion 19 which is telescop
and associated convoluted spring illustrating in dotted lines
ingly received by the central tube 18.
the assembled relationship between the end portions of the
The elbow 20 is of such a con?guration (see FIG.
brace bar and its central element.
65 10) that it may be formed from a single stamping of
FIG. 3 is a top view of the assembled brace bar shown
sheet metal which is reversely bent in order to form the
in FIG. 2.
FIG. 4 is a front elevation, partially exploded, partially
broken, in enlarged scale showing the end portion of
the brace bar or frame element and its intended assem
bled relationship with the tubular main member.
FIG. 5 is an enlarged, partially broken, partially sec
main body portions by folding until the edges of the
body portion meet at the junction 21. The mounting
tab 12 is of approximately the same Width as the blank
70 from which the entire elbow is punched. Additionally,
to provide strength at the joint between the mounting
tab 12 and the tubular body portion, a raised reinforc
3,078,087
3
ing rib 22 rounds the corner between the mounting tab
12 and the body of the elbow 26. The interior recess
or groove at said corner de?nes a spring detent 24 as
seen in FIGS. 4 and 10. As will be seen from FIG.
10, a single cross bar of the spring 16 ?ts within the
grooved spring detent 24, with a single end cross bar 25
of the reversely bent V-shaped end extension of the
spring 16 butting against ‘the body portion of the elbow
28 and spaced at number of cross bars from the cross
bar pivoted in the corner detent 24. While it will be
4
convoluted spring 16, and inverted to the position as
shown in FIG. 9 closely adjacent to the movable assem
bly hook 31. Prior to achieving axial alinement between
the recessed coupling portion 19 and the central tube 18,
the movable hook 31 advances axially to elongate and
pro-stress into a tensioned condition the convoluted spring
16. Thereafter, when the force on the movable book
31 is released, the tension of the convoluted spring moves
the free elbow 20 toward the ?xed elbow and stationary
hook 38 in such a manner that the recessed coupling
portion 19 telescopes into the central tube 13 and the
assembly is completed. The elbows 20 are then held
?rmly in position against the central tubular portion 18
by means of the pre-stress tension within the convoluted
itageous action of a V-shaped reversely bent end on a pre
stressed convoluted spring with a brace bar assembly of 15 spring 16. Additionally, as will be appreciated from
the stresses induced by the reversely bent end portion
the character herein employed. The V-shaped end re
25 of the convoluted spring 16 the extending lower por
tains its resilience and elasticity inde?nitely under con
tion of the recessed coupling portion 19 effectively bites
ditions which impart a set and destroy the spring action
into the interior of the central tube 18 further locking
of an end extension having a number of cross bars abut
20 the assembly into a secure relationship. While the sub
ting the ?xed frame member 20.
ject method has been described by utilizing a stationary
Referring now to FIG. 4, it will be seen that the re
book 30 and a movable hook 31, it will be appreciated
cessed coupling portion which is a reduced diameter end
that other con?gurations of elements for the purpose of
portion of the elbow 2G, is of a diameter intended for
extending the convoluted spring 16 into a pro-stressed
close telescoping ?t with the internal diameter of the
central tube 18. A central tube abutting shoulder 26 is 25 tensioned condition may be employed. The pro-stressed
readily apparent that additional end cross bars of the
spring could abut the elbow 20, such contact would
be disadvantageous and would not achieve the advan
de?ned at the central end of the recessed coupling por
tion 19. At the free end of the recessed coupling por
tensioned convoluted spring 16 not only serves to hold
the elements together, but in operation achieves advan
tages heretofore unattainable. One of its principal ad
vantages is to reduce the arch of the convoluted spring
plane perpendicular to the plane of the elbow 20, and
intersecting the plane of the mounting tab 12 at a lo 30 which is necessarily induced by reversely bending its end
portions. The result when the brace bar spring assem
cating cutoff angle 29 which exceeds the perpendicular
bly 10 is used on a seating frame 11 is to have a ?atter
by a small amount, the most advantageous commercial
top more nearly like other upholstery, rather than the
embodiment involving a locating cutoff angle of 102°,
customary high-arched construction oftentimes associated
or a cutoff angle 28 of 12°. While slight variations from
this angularity' are contemplated, and indeed a straight 35 with the convoluted spring of the character herein shown
and described.
cutoif angle will function satisfactorily once the central
Although a particular embodiment of the invention has
tube 18 is assembled to the elbows 20 along with the
tion 19, the end is cut off at an angle which lies in a
convoluted spring, as will be seen in FIG. 5, the cutoff
angle 28 is of such a relationship to the end of the cen
been shown and described in full here, there is no inten
tion to thereby limit the invention to the details of such
tral tube 18 that assembly by advancing the elbow 20 40 embodiment. On the contrary, the intention is to cover
all modi?cations, alternative embodiments, usages and
and the central tube 18 in alinement achieves a smooth
equivalents of the brace bar and spring, method and mech
and steady relationship between the end of the recessed
anism for assembling same as fall within the spirit and
coupling portion 19 and the open end of the central
scope of the invention, speci?cation and appended claims.
tube 18, thereby facilitating assembly in the manner to
We claim:
be described hereinafter. To achieve a satisfactory bind 45
1. A brace bar and spring comprising, in combination,
between the recessed coupling portion 19 and the end
an elongate central tube of preselected length, a pair of
of the central tube 18, the length of the recessed coupling
elbows serving as ends to close the tube, a coupling por
portion 19 should approximate twice the inside diameter
tion of such diameter at one end of each elbow, so as to
of the central tube 18.
telescopingly engage the central tube, a shoulder at the
Further advantages of the details of construction will
end of the coupling portion proportioned to abut the
be appreciated as the preferred method of assembly is
central tube end thereby to limit relative telescoping
described. Referring to FIG. 6, it will be seen that the
movement of the coupling portion into the tube, a fasten
convoluted spring 16 with a bent end portion is ?rst
ing tab at the end of the elbow opposite the coupling por
coupled at one end to a stationary assembly book 30 at
‘a point in substantial spaced relation to the interior por 55 tion and a pre-stressed convoluted spring reversely bent
at its ends around the fastening tabs and abutting its
tion of the single end bar 25, for example about the sec
associated elbow and urging the shoulders into pressed
ond cross bar therefrom, and then the convoluted spring
contact with the ends of the central tube and maintaining
is rolled around until a similar amount thereof extends
the shoulders in such contact.
beyond the movable assembly book 31.
2. A brace bar and spring comprising, in combination,
Thereafter the elbow 20 is moved into position as il 60
an elongate central tube of preselected length, a pair of
lustrated in FIG. 7 by engaging the convoluted spring
elbows serving as ends to close the tube, a coupling portion
detent 24 with a cross bar of the convoluted spring 16
at one end of each elbow to engage the central tube, an
sut?ciently beyond the single end loop 25 of the convo
intermediate portion of the elbow between its ends, a
luted spring 16 to free the V-shaped end extension from
the elbow. Thereafter, as sequentially shown in FIG. 65 fastening tab at the end of the elbow opposite the coupling
portion and a tensioned convoluted spring having V-shaped
8, the central tube 18 is slipped over the recessed cou
end portions reversely bent around the fastening tabs and
pling portion 19 of the elbow 20, and the operator can
having an end bar abutting the intermediate portion of
then manually, by using the leverage supplied by the
its associated elbow, the spring urging the coupling por
length of the central tube 18, invert the central tube 18
and its assembled single elbow 20 to the position shown 70 tions into the tube, and cooperating means on the por
tions and the tube limiting the movement of the portions
subsequently by the phantomiines in FIG. 8. At this
into the tube, the spring resisting withdrawal movement of
point the stationary book 36 ?rmly engages the con
the tube from the portions.
voluted spring 16.
3. A brace bar and spring comprising, in combination,
Thereafter, as illustrated in FIG. 9, the second elbow
20 is inserted beneath the- free other bent end of the 75 an elongate central tube of preselected length, a pair of
3,078,087
5
6
elbows serving as ends to close the tube, a coupling por
tion at one end of each elbow, proportioned to engage
the central tube, mounting means at the end of the elbow
adjacent ‘an edge of the end frame member with both arms
opposite the coupling portion and lying in a plane parallel
inward pressure on the end frame member at and through
the pivotally mounted bar thereof to draw said end frame
to the axis of the coupling portion and a tensioned con
of the V extending downwardly from said end cross bar
and from said means, the spring being prestressed to exert
member toward the other end frame member.
voluted spring reversely bent at its ends at the mounting
6. In a spring structure, a ?xed frame element includ
means and abutting its associated elbow, the spring resist
ing spaced apart end members, and a convoluted spring
ing separating movement of the coupling portions.
associated with said members and having a number of
4. A brace bar and spring comprising, in combination,
an elongate central tube of preselected length, a pair of 10 cross bars joined by edge loops alternating at opposite
edges of the spring, a number of end bars at the end of
elbows serving as ends to close the tube, a coupling portion
the spring being bent out of the general curve of the spring
of reduced diameter at one end of each elbow, a shoulder
to form a reentrant V at said end, the free end bar of the
at the end of the coupling portion proportioned to abut the
V only being pressed into frictional engagement with an
tube end, a curved portion of the elbow intermediate its
ends, a fastening tab at the end of the elbow opposite the 15 end frame member, and means pivotally mounting the
cross bar at the other end of the V to the end frame mem
coupling portion and lying in a plane parallel to the axis
ber, the spring being prestressed to exert inward pressure
of the coupling portion and perpendicular to the plane of
on the end frame member at and through the pivotally
the curved portion, a convoluted spring having cross bars
mounted bar thereof to draw said frame member toward
joined by end loops and reversely bent into V-shape at its
ends around and pivoted to the fastening tabs, the end 20 the other frame member, the frame element being sec
tional and tubular and comprising a central cylindrical
cross bar only of the spring abutting the curved portion of
tube, the end frame members having reduced hollow
the elbows, the end of the coupling portion of the elbows
cylindrical end coupling portions of the same diameter
being diagonally cut at an angle which leaves the lower
substantially as the inner diameter of the central tube and
portion of the coupling portion end longer than the top,
thereby permitting insertion of the coupling portion into 25 received in the respective ends of said tube, each of the
coupling portions terminating in a circumferentially ar
the tube while out of alignment therewith.
ranged cylindrical annular shoulder abutting against an
5. In a spring structure, a ?xed frame element including
end of the central tube and limiting the telescoping move
spaced apart end members, and a convoluted spring asso
ment of the coupling portion into the tube, the spring re
ciated with said members and having a number of cross
bars joined by edge loops alternating at opposite edges of 30 sisting movement of the end members out of the tube.
the spring, said spring comprising a main body portion
and a number of end bars at the end of the spring being
bent out of the general curve of the spring and down
wardly from the main body portion to form a reentrant
V at said end, the V having two short arms arranged sub
stantially at an obtuse angle with each other, the lower
most free end bar of the lower arm of the V only being
pressed into frictional engagement with an end frame
member, the apex of the V being in inward spaced relation
40
to said frame member, and means pivotally mounting the
cross bar at the end of the upper arm of the V on and
References Cited in the ?le of this patent
UNITED STATES PATENTS
1,096,801
2,257,633
2,518,867
2,608,752
D’arcy _______________ __ May 12,
Bank ________________ __ Sept. 30,
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Blumensaadt __________ __ June 12,
Clary ________________ __ Aug. 15,
Schilling _____________ __ Sept. 2,
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2,860,693
Lincoln ______________ __ Mar. 24, 1953
Riebel _______________ __ Nov. 18, 1958
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