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Патент USA US3033294

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May 8, 1962
M. T. ULRICH
3,033,284
LINK CHAIN
Filed June 25, 1958
_
Fiifz.
INVENTOR.
MART/N TULRICH
BY
WAC/W
United States Patent O??ce
1
,
3,033,284
Patented May 8, 1962
2
3,033,284
LINK CHAIN
Martin T. Ulrich, Box 287, Fremont, Calif.
Filed June 23, 1958, Ser. No. 743,666
2 Claims. (Cl. 160-235)
This invention generally relates to hinge or chain con
structions adapted for use with folding panels or the like,
Referring ?rst to the end portion 8, the blank in this
area is ?rst provided with a pair of slots 14 of relatively
narrow width, and parallel to and equally spaced from the
opposed edges 16 and 17 of the link. These slots pro
vide corner tongues which are ?rst bent upwardly from
adjacent the bottom of the slot at right angles to the
planar portion 7 to de?ne Webs 18, and the ends of the
tongues are then bent over the portion 7 to provide ?anges
and is more particularly directed towards a link chain in
19 and de?ne with the webs 18 ‘and subjacent link por
which the respective links or members are pivotally at 10 tions U-shaped tabs 2% for receiving the slats 12 as best
tached without requiring the use of conventional pins or
seen in FIGURE 3 of the drawing.
pintles, and also to a novel table top utilizing the chain
The medial section of end portion 8 is rolled upwardly
and towards the other end portion to provide a cylindrical
of this invention.
An object of the present invention is to provide a chain
in which the respective links may be stamped or similarly.
formed from flat blanks of material with portions of the
blanks constituting the pivotal connection between adja
cent links.
element 21 positioned longitudinally beyond the tab webs
18. As will be later made clear, element 21 constitutes
a pin or pintle, vand is accordingly offset slightly upwardly
from the portion 7 to facilitate its pivoting or rocking en
gagement with a pin-receiving element later to be de
scribed. It will also be noted that a transverse slot 23
Another object of this invention is to provide a chain
of the character described in which the interengaged por 20 is provided inwardly of the pintle element 21 which ex
tends substantially to the previously discussed longitu
tions of adjacent links provide a substantially continuous
dinal slots 14.
pintle and loop so that full ‘and smooth pivotal action
between the links is obtained.
'
Reference is now made to the other end 9 of the link,
which, as will be understood, would also constitute the
of the’ type describedpin which the respective members 25 portion of an adjacent link which cooperates with the
just described end portion 8. This end has a pair of longi
upon the formationrthereof, are provided with tongues or
tudinal slots to de?ne corner tongues which are deformed
the like for ready engagement with slats or panels, with
A further object of the invention is to provide a device
one of each of the latter being secured to one of the links.
into tabs which are directed towards the tabs on the end
portion 8. However, the slots are of greater transverse
table top or the like incorporating a chain of the type 30 width than the slots 14, thereby leaving a center tongue 26
Yet another object of this invention is to provide a
described and which is formed of a plurality of slats or
panels, whereby the table top may be rolled into a com
of substantially the same width as the transverse extent
pact inoperative position, and which in its planar or opera
tive position substantially completely hides the chain and
upwardly into a generally cylindrical loop 27, but in the
its method of attachment to the slats.
The invention possesses other objects and features of
advantage, some of which with the foregoing, will be set
forth in the following description of the preferred form
of the invention which is illustrated in the drawing accom
panying and forming part of the speci?cation. It is to
be understood, however, that variations in the showing
made by the said drawing and description may be adopted
within the scope of the invention as set forth in the claims.
Referring to said drawing:
of the groove 23. The tongue 26 is subsequently rolled
initial formation of the individual links, this rolling op
35 eration is not performed, since the latter is effected only
when a pair of links are brought into adjacent relationship
‘and at that time, this ?nal rolling is effected.
It should be readily understood that in connecting adja
cent links, the tongue 26 of one link is inserted upwardly
through the slot 23 of an adjacent link and then rolled
over the pintle 21 to provide a pintle-receiving element of
generally tubular form ‘and being freely spaced from the
pintle so as to permit free rotary movement therebetween.
Notwithstanding the absence of a conventional separate
FIGURE 1 is a perspective view of one of the links 45 pin, generally cylindrical pintle and pintle receiving sur
faces are de?ned by the elements 21 and 27 with their
of the present invention, the phantom lines representing
attendant desirable features of ease of movement and
a portion of the blank before its deformation into ?n
rugged strength.
ished form.
With the chain construction as hereinabove described,
FIGURE 2 is a side elevational view on a reduced scale
of a plurality of interengaged link members in opera 50 the chain may be rolled about a drum or the like having
tive position on a plurality of table top slats.
FIGURE 3 is a cross-sectional view of a pair of inter
an extremely small radius. In fact, adjacent link mem
bers are extremely free to rotate about the pintle axis and
consequently permits a relatively tight winding of a length
of the chain.
trating the parts in their rolled up or inoperative posi 55 The tabs 20, as above explained, permit the ready en
gagement of the chain on the panels or slats 12 where
tion.
engaged link members.
FIGURE 4 is a view similar to FIGURE 2, but illus
Attention is ?rst directed to FIGURE 1 of the drawing,
wherein one of the novel link members of the instant
invention is best disclosed. As was hereinbefore ex
the chain is used on a folding panel partition, table top,
garage door or the like. While it would be possible
to have the respective panels embraced within the depth
plained, each link member 6 is preferably stamped or 60 of the U-shaped tabs, it has been found more desirable
otherwise formed from a ?at metal blank. This blank
to provide panels of greater thickness. As will be seen
is of rectangular form, having a width equal to the width
in the drawing, each slat 12 is provided with a notch
of the ?nished link 6, and a length substantially in excess
31 extending from the lower surface thereof to approxi
of the link length. The center portion of the blank is
mately one-half the thickness of the slat de?ned by angu
not deformed in any manner and constitutes the planar 65
larly related walls 32 and 33‘. At the juncture of these
central portion 7 of the link 6. However, the respective
Walls, thin slots 34 may be cut into the slat for the pur
pose of receiving the tabs 19 or 20. The slots 34 are
preferably narrower than the thickness of the tabs so that
and likewise de?ne means for attachment to a panel or
slat 12. As will be understood, one end, such as the end 70 upon assembling the parts, the metal tabs are forced into
end portions 8 and 9 are deformed and offset so as to
provide for a pivotal connection with each adjacent link,
8 constitutes the pintle portion of the link, while the
other end de?nes the pintle-engaging loop.
the slots, cutting into the surrounding wood and ?rmly
holding the wooden panels together, and permitting their
3,083,284
3
4
ready movement from the planar operative position shown
slot of an adjacent link and rolled into tubular form
in FIGURE 2 of the drawing to the rolled up or inop
erative position illustrated in FIGURE 4. When in its
around said cylindrical portion.
extended operative position, the panels 12 provide a sub
stantially continuous planar upper surface 36 with the
respective panels in practically abutting relationship, with
the chain completely hidden from the upper surface.
However, due to the ?exibility of the chain, it permits the
2. Apparatus of the character described comprising a
plurality of slats, each of said slats having identical
notches formed at the edges thereof and each of said
notches extending from one surface of the slat to medially
of the thickness thereof, a link chain including a plurality
of interconnected links, each link comprising a central
planar portion having tabs adjacent the corners thereof
From the foregoing description, it will be appreciated 10 and means formed integrally with each of said links
pivotally connecting adjacent links together, the tabs at
that l have provided a link chain incorporating an integral
one end of each link being directed towards the tabs at
pintle of desirable cylindrical form permitting full move
the other end thereof, the length of each central planar
ment and maximum strength, and which likewise has
portion being slightly less than the Width of said slats,
incorporated therein a novel tongue or tab arrangement
15 said links extending in longitudinal alignment along said
for attachment to panels or slats.
rolling up of the unit as illustrated.
What is claimed is:
l. A link chain comprising a plurality of interengage
able links, each of said links having a generally rectangu
lar planar central portion with each end thereof having
surfaces of each slat and said tabs extending into the
a pair of longitudinal slots dividing the end portions into
References Cited in the ?le of this patent
slats in parallel relation to said surface, and said pivotal
connecting means being disposed substantially entirely
within a recess de?ned by adjacent notches.
three tongue elements, the outermost elements on each
UNITED STATES PATENTS
end being bent upwardly and then towards the other end
to provide panel-receiving tabs, a central element on one
end being rolled into generally cylindrical form having its 25
axis disposed transversely of said central portion and
positioned longitudinally beyond its adjacent tabs, means
de?ning a transverse slot positioned inwardly of and
adjacent said cylindrical rolled portion, a central ele
ment on the other end of each link passing through the 30
1,194,611
1,831,629
2,061,548
Fishel _______________ __ Aug. 15, 1916
Mambourg ___________ __ Nov. 10, 1931
Cameron ____________ __ Nov. 24, 1936
251,589
9,281/27
Great Britain _________ __ Mar. 16, 1927
Australia ____________ __ Mar. 25, 1927
FOREIGN PATENTS
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