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Патент USA US2117524

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‘May 17, 1938.‘
M. STUBNITZ
2,117,524
'SPRING AND AIR CUSHION
Filed June 8, 1936
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INVENTOR.
ATTORNEYS.
May 17, ,1 938.
M. STUBNI‘II'Z
> 2,1 17,524
SPRING AND AIR CUSHION
Filed June 8, 1936
2 Sheets-Sheet 2
INVENTOR.
ZEM.WM
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ATTORNEYS
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Patented May 17, 1938
2,117,524
UNITED STATES PATENT OFFliZZE
_>
2,117,524
SPRING AND AIR CUSHION
Maurice Stubnitz; Adrian, Mich, assignor to
Stubnitz-Greene Spring Corporation, Adrian,
Mich., a corporation of Michigan
Application June 8, 1936, Serial No. 84,038
6 Claims.
This invention relates to a spring and air cush
ion.
It is broadly old in the art to provide the up
holstered spring cushion with a bottom closure
plate which is either perforated or spaced from
the edges of the bottom frame to regulate the
out?ow of air entrapped within the cushion as
the cushion is being loaded and to regulate the
inflow of air into the cushion as the load is being
removed.
This invention relates particularly to the man
ner in which the bottom closure plate and the
spring assembly are secured to the frame.
In the drawings:
Fig. 1 is a top plan view of the spring and air
cushion with the trimming partly broken away.
Fig. 2 is a section along the line 2--2 of Fig. 1.
Figs. 3, 4 and 5 are sections taken along the
line 5—5 of Fig. 1‘ showing the steps pursued in
securing the spring assembly and bottom closure
plate to the bottom frame.
Fig. 6 is a section similar to Fig. 5 showing a
modi?ed form of the invention.
Referring more particularly to the drawings
there
is shown a spring and air cushion compris
25
ing a bottom frame I which extends completely
around the cushion, cross slats 2, coil springs 3
and a cover 4.
The coil springs 3 are assembled together as a
3 O separate unit.
The springs 3 are connected at
the top by the cross stay wires 5 and at the bot~
tom by the channel section strips 6 which are
clamped on to the lower convolution of each of
the coil springs as at ‘I. The bottom frame I is
reinforced by a plurality of slats 2 which have
their ends ?ared as at B and then bent upwardly
as at 9 and downwardly as at I0 about the up
standing portion of the frame I. The slats are
secured to the frame by indenting at spaced
40 points as at II the return bent portions 9 and ID
(Cl. 155—-1'79)
edge of the frame is curved inwardly as at I4 and
then curved back upon itself as at I5 to form a
beaded bottom edge with an overhanging lip I6.
A wire clip I? is then passed downwardly between
the outer edge of the closure plate I 2 and the
frame I, as shown in Fig. 3.
The wire clip I‘! is initially approximately L
shaped and comprises a long straight leg I8 and
ashort leg I9 at right angles thereto, the outer
end of the short leg I9 being turned upwardly as
at 20 to provide a hook. As shown in Fig. 3, when
the clip I‘! is passed downwardly between the
edge of the closure I2 and the upstanding
wall of the frame I, the leg !9 is positioned par
allel to the upstanding wall of the frame I. After
the clip is inserted sufficiently so that the leg I9
is below the overhanging lip IS, the clip is then
turned 90° to the position shown in Fig. 4. The
clip I‘! is next drawn upwardly until the leg I9
engages the overhanging lip I8 and the leg I8 is ~1
then bent downwardly over the channel section 20
strips 6 and the edge of the plate iii as at 2.5
(Fig. 5) thus securely locking the closure plate I2
As
and spring assembly to the bottom frame.
many clips I‘! can be used as desired and they, of
course, will be positioned between the slats 2
along the two sides of the frame to which the
slats are connected. They will also be used along
the other two sides of the frame at suitable inter
vals.
After the spring unit and plate i2 have been
assembled to the frame, the cover 4 is drawn over
the spring assembly and secured to the bottom
frame I preferably in the manner shown in the
copending application of Daniel A. Greene, Serial 35
No. 25,771, ?led June 10, 1935, which became
Patent No. 2,060,465 on Nov. 10, 1936.
The modi?ed form of clip is shown in Fig. 6.
Instead of making the clip I? out of wire with a
circular section, it, of course, can be made from 40
as well as the upper portion of the frame I which
other forms of wire or steel stock.
they overlap.
In Fig. 6 the clip 25 shown is made of ?at strip
steel. The bottom frame 26 in this seat construc
The bottom of the frame is arranged to be
closed by the closure plate I2 which is positioned
upon, and supported by, the slats 2. The closure
plate I2 has a relatively tight ?t along its edges
with the frame I and is provided with the neces
sary number of holes I3 to permit and properly
regulate the flow of air into and out of the cush
50 ion.
After the closure plate I2 has been positioned
upon the slats 2, the spring unit is next positioned
upon the closure plate I2 as shown. It is essen
tial that the closure plate and spring assembly be
To this end the bottom
55 secured to the frame.
tion comprises an inverted V having a return bent
bottom edge which forms a bead 21 to which the 45
covering 4 can be secured, as shown in the above
mentioned copending application. The flat strip
clip 25 initially has a return bent lower edge 28
which forms a hook and a straight long leg 28.
The clip is inserted between the inner depending 50
wall 30 of the frame 26 and the edge of the
closure plate I2 and section strip I5, and then
drawn upwardly so that the hooked end 28 inter
engages the bottom edge of the depending wall 30.
The leg 29 is then bent inwardly and downwardly 55
2
2,117,524
over the channel section strip 6 and the edge of
the plate I2 to secure the spring unit and plate
I2 to the frame 26.
I claim:
1. A spring cushion comprising a bottom frame
having a lip positioned inwardly of the outer
wall of said frame, cross slats ?xed at each end
to said frame, a bottom plate supported above
and spaced from said lip by the said slats and po
10 sitioned between said lip and below mentioned
spring unit, a spring unit mounted on said plate,
one or more clips connected to the said spring
unit and the lip on the said bottom frame to se
cure the spring unit, frame and bottom plate
15 together, and a covering for concealing said
spring unit, clips and bottom frame,
2. A spring cushion comprising a bottom frame
de?ning an opening having a lip positioned in
wardly of the outer wall of said frame, cross
20 slats ?xed at each end to said frame, a bottom
plate supported by said slats and substantially
closing the opening formed by said frame and
positioned between said lip and below mentioned
spring unit, a spring unit mounted on said plate,
25 one or more clips passing through the joint be
tween the edges of the bottom plate and the
frame interengaging said spring unit and the
lip on said bottom frame to secure the spring
unit, frame, and bottom plate together, and a
30 covering for concealing the said spring unit,
frame and clip.
3. A spring cushion comprising a bottom frame
de?ning an opening having an outer wall and a
lip positioned inwardly of the said outer wall,
35 cross slats ?xed at each end to said frame, a bot
tom plate supported by said slats for closing the
opening formed by the said frame, a plurality
of springs assembled as a unit and mounted on
said bottom plate, one or more clips each of
40 which has a hooked end engaging the lip on the
said bottom frame and extending upwardly be
tween the edge of the bottom plate and the
frame and then inwardly over the lower edge of
the said spring unit to secure the spring unit,
bottom plate and frame together, and a covering
for the said spring unit.
4. A spring cushion comprising a bottom frame
having an outer wall and a lip positioned in
wardly of the said outer wall, cross slats ?xed at
each end to said frame, a plurality of springs as
sembled as a unit and supported by said slats, one
or more clips each of which has a hooked end
engaging the lip on the said bottom frame and
extending upwardly between the edge of the 10
spring unit and the frame and then inwardly
over the lower edge of the said spring unit to
secure the spring unit and frame together, and a
covering for the said spring unit.
5. A spring cushion comprising a bottom frame
having an outer wall and a depending lip posi
tioned inwardly of the outer wall and concealed
thereby, a spring unit supported by the said
frame, the said spring unit comprising a plu
rality of springs and metal strips securing the
springs together at their lower ends, one or more
clips having a hooked bottom end interengaging
the depending lip on the lower frame and extend
ing between the outer frame and the bottom edge
of the spring unit and then bent downwardly over
the spring unit to secure the same to the frame,
and a covering for said spring unit.
6. The method of fabricating a spring cushion
of the type having a bottom frame with a lip
spaced inwardly of the outside wall of the said 30
frame, cross slats secured to the frame, a spring
unit supported by the said slats comprising the
steps of passing a spring clip having a hooked
lower end downwardly between the lower edge of
the spring unit and the frame with the hook 35
approximately parallel to the wall of the said
frame, then turning the clip to position the hook
under and interengaging the hook with the lip
on the frame, followed by bending the upper
portion of the clip inwardly and downwardly over
the said lower edge of the spring unit to secure
the spring unit and frame together.
MAURICE STUBNITZ.
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