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Патент USA US2112454

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~ March 29,
Filed March 9, 1934
2 Sheets-Sheet 1
‘March 29, 1938.
Filed March 9, 1934
_ 2 Sheets-Sheet 2
FM?” W Q- M’
Patented Mar. 29’, 1938
Mansell Allan Davis, (Los Angeles, Calif.
Application ‘March 9, 1934,. Serial No. 714,845
.. 5v Claims.
(Cl. 5-114)
My invention relates to new and useful im
lower end of one of the corner legs of a folding
provements in the construction, methods of fold
Fig. 13 is a fragmental sectional side elevation
ing and setting up of folding cots. ‘
My invention relates to improvements in fold
5 .ing cots, comprising a, ?exible top portion en
gaged to side rails which are detachable from a
supporting frame, which may be folded from an
extended lengthwise and crosswise position to
practically a bundle of parallel bars.
My invention relates to the construction and
method of extending the fabric top of a folding
cot, by means of toggle joints in the cross sections
of a supporting frame.
My invention relates to the construction and
15 methods of attaching the fabric top of a folding
cot so that it adapts itself to the human form.
My invention relates to the construction and
method of adapting‘ the supporting frame of a
folding cot to uneven ground.
" . '
My invention relates to the details of construc
tion and methods of attachment of the various
parts of a folding cot, by which the supporting
frame and detachable top can be folded or extend
ed and set up.
I attain these objects by the construction illus
trated in the accompanying drawings, in which
Figure 1 is a perspective view of afolding cot.
Fig. 2 is a fragmental plan view of the method
of attaching the fabric‘top of a folding-cot to the
supporting side rails.
' -
Fig. 3 is a front elevation of the side section of
a folding cot, partially folded.
of a toggle joint and engaging clamp on a cross
bar of a folding cot.
Fig. 14 ‘is a front fragmental elevation of the
crossing of two brace rods, showing the method
of their pivotal engagement.
Like reference characters refer to like parts in
the several ?gures of the drawings.
This invention was made to meet the demand
for a folding cot, light in weight, compact in size
when folded and strong and comfortableiwhen
setup for use. This invention makes possible
an economical folding cot to manufacture. which .15
can be quickly set up and quickly folded.
Inthe manufacture of the folding cot, two parts
are assembled separately-—a top or bed part and
a supporting frame, Fig. 1. The top part has two
parallel side rails l and 2 of channel cross section 20
construction, each consisting of two sections I’
and I” and 2' and 2" connected pivotally by
hinge links 3 and 3' respectively, which are sufli
ciently narrow to allow channel edges of each pair
to pass each other and fold parallel compactly as .25
‘shown in Fig. 4. Each side rail l and 2 straight
ened out and positioned parallel to each other
carries a line of eyelets 4 in Fig. 2 on the, inner
side of said rails relative to each other Fig. 1.
These eyelets 4 are formed by loops in‘wire 5 ex- 30
tending through apertures 6 in said side rails
‘from the inside of said channel structure. ‘The
Fig. 4 is a front elevation of the hinge section
of the side rails of a folding cot.
Fig. 5 is a side elevation of a leg of a folding
assembly of the top- portion of the folding cot
comprises side rails I and 2 straightened out'and
spaced apart the desired width of a cot, with the 35 I
cot showing its attachment to side rail at the top,
‘eyelet side of the rails facing each other; between
to cross bars at the side and foot at the ‘bottom.
Fig. 6 is a front elevation of a cross section of
the rails l and 2 is positioned a rectangular piece
of ?exible fabric 1, about the length of said'side
rails and slightly narrower than the distance be
tween the side rails l and 2, with a row of eye- 40
lets 8 along each longitudinal edge of fabric 1
staggered relative to eyelets 4 along the side rails.
a folding cot with toggle joint in the stage of being
Fig. 7 is a fragmental elevation of the channel
view of a leg of a folding cot, enclosing a cross'seo
tion of a cross bar resting on inwardly formed
?anges of said channel structure of'a leg.
Fig. 8 is a fragmental front elevation of the top
of the middle leg of the side section of a‘ folding
Fig. 9 is a front elevation of a cross section of
a folding cot partially folded.
Fig. 10 is a cross sectional plan view of. a leg,
thrust bar and tie rod in a folded condition;
‘Fig. 11 is a cross sectional view of a leg of a
These eyelets are formed by slits cut at the de- ‘
‘sired intervals into the hem 22 along the longi
tudinal edges and at right angles thereto; the 45
ends ofedge
said of
are hem,
by wires
are removable
23 in the
through the open ends of. said hems 22 when it
is desired to wash said fabric 1. Through eye
lets 4 and 8 cord 24 is laced alternately thus en- 50
folding cot showing method of attaching brace
gaging fabric 1 to side rails I and 2 on the re
spective sides of said fabric. This method of lac
ing a fabric bed portion to supporting side'rails,
makes possible the adjustment of the cross tene
Fig. 12 is a fragmental front elevation of the
sion of said fabric 1. relative to any stretching or 55
shrinkage. The slippage of cord 24 through eye
lets 4 and 8 makes the fabric bed portion ‘I adapt
able to the human form when a person is reclin
ing upon it. The ends of the cords are convenient
ly engaged to the ends of side rails I and 2 by a
(25) wedge shaped notch in each end thereof.
The slippage of cord 24 through eyelets 4 and 8
is controlled by an occasional cross lace or knot
ally engages two adjacent legs ‘I 1 near the top of
one leg and near the bottom of the other. This
engagement is effected by inserting the ends of
said brace rods bent at right angles into elongated
slots 34 behind ba?le ?anges 35 on the outer face
of said legs II, and giving them a quarter turn
behind baffle 35 before said brace rods 28 and 29
are riveted at their crossing with their loops 36
15 frame.
held parallel against rotation by plates 33. This
method of assembling the brace rods 28 and 29 10
to the legs and to each other, not only prevents
the several parts from separating, but provides
a pivotal and perpendicular movement to the
ends of said brace rods 28 and 29, and holds them
in the plane of the assembly of said trusses by 15
The supporting frame, when extended is rec
tangular in plan, and may be considered from two
aspects, namely a plurality of cross sections and
of side trusses. The cross sections of the sup
20 porting frame comprise two opposite legs II en
gaged to each other by means of a telescoping
tie rod I3 formed of two rods coiled around each
other at their inner ends at I4 and pivotally
engaged at their outer ends to legs II respec
25 tively near their bottom portions Fig. 6. Posi
tioned above cross tie rod I3 is thrust crossbar
the ends of said brace rods, Figs. 11 and 12. At
the top of the center leg I I the ends of said brace
rods are limited in their perpendicular move
ment by shorter slots 31 and 31', but held to a 20
movement in the plane of assembly by short
?anges 38 and 38’, Fig. 8 when they are being
folded. Brace rods 28 and 29 are provided with
hinges 3! between their points of crossing and
their engagement to the top parts of legs I I. Fig.
3 shows brace rods 28 and 29, and legs I I assembly
26 of Fig. 2. This top or bed portion, with rails I
and 2 folded at hinges 3 and 3', and fabric ‘I rolled
about them makes a small light package. The
side rails I and 2 have apertures 9 for receiving
projections I9 near the top of legs I I, Fig. 5 when
the top portion is being attached to the Supporting
means of ?ange baffles 35 overlapping a section of
I5 having toggle joint I6 with locking clamp I'I
partially folded. When completely folded legs I I,
operated by spring I8 Figs. 6 and 13 between
the ends of said thrust bar I5 which are pivot
-30 ally attached to legs II, one at each end of said
brace rods 28 and 29, and thrust bars I5 and tie
cross bars I5. The methods of attaching tie rod
I3 and cross thrust bar to the legs are shown in
the detail drawing of the leg II in Fig. 5, in
which cross thrust bar I5 extends into the channel
of the leg structure, pivotally attached thereto by
rivet 2| and is controlled against a downward
movement beyond a right angle to the leg by an
abutment of the end of bar I5 against the inner
wall of the back of the channel structure of said
40 leg at 20, and by inwardly formed ?anges I9
Fig. 7 from‘ the sides of the channel formed
legs. Tie rods I3 are pivotally attached to ?ange
21 Fig. 10 projecting centrally from the back of
the channel form of leg I I, so that the thrust bar
I5, tie rod I3 and leg II will fold together in
compact manner as shown in Fig. 10. When the
cross section of the supporting frame is in use
the top of the legs at each end thereof are
held together against outward movement by the
50 top part of the folding cot, and the bottom. of the
legs are held by tie rods I3 against outward move
ment. Between these tie engagements, thrust bar
‘I 5 with its toggle joint action applies an outward
pressure to the limit of its length. With the
ends of thrust bar I5 limited to a right angle in
the downward movement of said bar, a very rigid
construction is obtained, which holds the cot
against side sway. Figure 9 shows the cross
section partially folded. When folded the legs
60 are in alignment making bundle compact.
In considering the side aspect of the supporting
frame, we have, in combination with the side
rails of the top portion, a plurality of trusses,
comprising vertical legs I I engaged to each other
by side rails I and 2 across the top of
said legs, by the insertion of projections II] at
the top of legs II into apertures 9 in the outer
side of side rails I and 2, Figure 5, and said
adjacent legs II are also attached to each other
by two diagonally positioned brace rods 28 and
70 29 crossing and pivotally engaged to each near
their centers by looping around rivet 32 which
positions concaved plates 33 around said loops
Fig. 14 on both sides of said crossing of brace
rods 28 and 29. Each brace rod 28 and 29 pivot
rods I3 all come together substantially parallel
into a very small bundle, and when rolled into the z‘.
top fabric with the folded side rails, a small pack
age is provided for handling.
To set up the cot from a folded condition,-—
?rst take the supporting frame, open the cross
sections by pulling the legs apart crosswise, then 7
holding the cross section nearest the operator,
cast the rest of the frame outward, and set it down
with the legs in a vertical position. Then unroll
the fabric of the top portion from around the
side rails, straighten out said side rails and the _
fabric. between them, place the channel struc~
'ture of the side rails over the tops of the legs on
each side of the supporting frame, and insert
projections ID at the top of the legs through aper
tures 9 in the side rails correspondingly. Then
straighten out toggle joint I6 of the several cross
sections. This communicates a spreading thrust
between the side rails, which stretches the ?exible
fabric bed portion tov a predetermined tension.
The cot is thus set up for use. It has been made 50
adaptable to an uneven ground foundation, by
means of the hinges in brace rods 28 and 29, and
by the perpendicular movement of the ends of
said rods, made possible in the elongated slots 34
of the end legs II of the side trusses of the sup
porting frame. The adaptability of the ?exible
fabric bed portion to the human form, by means
of my method of lacing to supporting rails, pro
vides a very comfortable cot to rest upon.
folding cot is very light in weight, made possible
by the channel structure of many of the metal
parts. The legs II are of double channel con
struction; a small channel formed in the back
of the larger indicated 39 in Figures 5, 10, 11
and 12.
What I claim and desire to secure by Letters
Patent is:
1. A folding cot comprising a. rectangular de
tachable top portion in combination with a sup
porting frame constructed of a plurality of cross 70
sections, said sections having a vertical leg on
each end thereof, an extensible tie rod of pre
determined length when extended, one of said tie
rods being pivotally connected to the vertical pair
of legs of a cross-section adjacent the lower ends 75
’ of the legs and a thrust bar including a toggle
lately connected means and the legs providing a
joint between the ends thereof, one of said bars
limited movement of the pivots longitudinally of
said legs.
being pivotally connected to each pair of legs of
a cross-section at a point between the tie rod and
the detachable top portion.
2. In a folding cot, the combination of a de
tachable top bed portion, and a supporting frame
comprising a plurality of cross sections consisting
of a cross bar of two parts each of channel
formation, pivotally connected to each other at
their inner ends, one part adapted to fold into
the channel structure of the other part, and pivot
ally connected at their outer‘ ends to legs of chan
nel formation, into which said cross bars can
15 fold, and an extensible tie rod pivotally connected
4. In a folding cot structure, a supporting
frame adapted to receive a top bed portion, said
frame comprising end cross sections and an inter
mediate cross section, each cross section compris
ing a pair of vertical legs, an extensible tie bar
secured adjacent the lower ends of the legs, a ~
hinged cross bar comprising a pair of sections, 10
the outer ends of which are pivoted to the legs
at points between the tie bar and the top bed por
tion, said cross bar sections being pivoted to each
other whereby they may be moved into longi
tudinal alignment substantially parallel to the tie 15
at its outer ends to said legs, and adapted to
bar, and means for locking said cross bar sec
fold into the channel structures of said cross bars
tions in said position of longitudinal alignment.
and said legs.
3. In a folding cot the combination of a de
20 tachable top bed portion having longitudinal side
rails, a plurality of transversely extending fold~
able cross sections providing supporting legs for
the top bed portion, means articulately connect~
5. In a folding cot the combination of a de
tachable bed portion, longitudinal side rails
therefor, a supporting frame to which the longi 20
tudinal side rails with its top are connected, said
frame including a plurality of cross frame sec
tions, each section having a. pair of legs, an ex
point intermediate adjacent cross sections, means
pivoting the rods together at said point of inter
section, the portion of rods extending beyond the
tensible tie rod of ?xed length when extended and
engaging the legs adjacent the lower ends to pre 25
vent them from spreading, an intermediate fold
ing brace pivotally engaging the legs at its ‘oppo
site ends intermediate the top portion'and the
point of pivot being shorter than the length from
tie rod, said intermediate folding brace having
ing said folding cross sections, said means in
25 cluding a pair of rods crossing each other at a
30 the pivot to the legs of adjacent cross section
and supplemental rod lengths pivoted to said
short sections and to the legs of adjacent cross
sections and means included in the pivotal con
nections between the rod portions of said articu
abutments contacting the legs when the brace 30
members are in longitudinal alignment in their
bracing position whereby the brace will hold the
legs against collapsing.
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