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Патент USA US2406712

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Aug. 27, 1946.
w. 'K. ROBBINS
2,406,712
CHAIN LINK
Filed Feb. 5, 1944
TTUHJVEY
Patented Aug.‘ 21, 1946
‘ .
UNITED
2,406,712 *
.. ,
STATES ~ PATENT
OFFICE -. - -
2,406,712
CHAIN LINK
William K. Robbins, Chicago, 111.
Application February 5, 1944, Serial No. 521,189
5 Claims. (01. 59-84)
1
The invention relates to improvements in chain
links and has for its primary object the pro
vision of a chain link made of separable mem
bers which may be readily assembled when de
sired, either with similar links or with integral
links to constitute a chain, which is capable of
economical production and highly e?icient in
this way a chain link is provided which may be
readily formed by stamping or forging opera
tions, and may therefore be economically pro
duced. "It will also be noted that the rivets l1
and the interlocking projections l3 are located
on opposite sides of the lines of strain on each
link limb which are approximately on lines
20-20 of Fig. 1, thereby adequately resisting
said strains with a minimum of material.
Other objects will appear hereinafter.
In the modi?cations illustrated in Figs. 4, 5,
The invention consists of the combinations 10 and 6 interlocking ribs 18 and corresponding
and arrangements of parts hereinafter described
grooves [9 are formed in the link parts to con
and claimed.
stitute' further interlocking elements between
use.
.
The invention will be best understood by ref
erence to the accompanying drawing forming a
part of this speci?cation and/in which
Fig. 1 is a face view of a chain link embody
ing the invention and shown in assembled con
.dition;
Fig. 2, an edge view thereof;
,
' them. Otherwise the constructions are substan
15 tially the same. Such a construction may be
readily made by ordinary forging operations and
will afford a very secure interlocking engage
ment between the link members. In this in
stance, a single rivet I1 is employed for secur
the link members together.
‘
Fig. 3, a view of theblank from which the 20 ingWhile
I have illustrated and described the pre- .
separable link members are formed;
ferred forms of construction for carrying the
Fig. 4, a view similar to Fig. 1 but showing a
invention into eifect, these are capable of vari
slightly modi?ed form of construction;
ation and modification without departing from
Fig. 5, an edge view of the link shown in Fig.
25 the spirit of the invention. I therefore do not
4; and
.
Fig. 6, a section taken substantially on line
6-4; of Fig. 4.
wish to- be limited to the precise details dis
closed, but desire to avail myself of such vari
ations and modi?cations as fall within the scope
The embodiment of the invention illustrated
of the appended claims.
in Figs. 1, 2 and 3 comprises two substantially
. °
U-shaped separable link members, each consist 30 I1. claim:
A chain link comprising two substantially
ing of a blank composed of two similar parts l0 _ U-shaped separable link members, each consist
folded into juxtaposition to constitute a com
ing of a blank composed of twosimilar parts
plete link half or member having limbs of twice
foldable into juxtaposition and provided with
the thickness of material as shown. The said
interlocking elements; and means for securing
35
blank, when formed, is provided with a central
said members against separation.
opening H, arranged as indicated along the
2. The construction ‘speci?ed in claim 1 in
central line of fold, with notches H! in each
which said interlocking elements consist of a
outer edge forming adjacent projections l3. The
head formed at the end of one limb of each link
blank is also provided with suitable rivet holes
member and a socket formed at the end and
14 and the arrangement is such that when the 40 between the members of the other limb to re
blank is folded centrally upon itself, the parts
ceive the head on the other link member.
ID are brought into juxtaposition with the cen- .
3. The construction speci?ed in claim 1 in
tral portions 15 separated slightly to form a re
which said interlocking elements consist of a
ceiving socket l6 adapted and arranged to re
head formed at the end of one limb of each link
ceive the associated projections l3 on the end of 45
‘member and a socket formed at the end and
the other limb of the other link member, as will
between the members of the other limb to re
be readily understood.
ceive the head on the other link member, there
The notches l2, the projections l3 and rivet '
being an inwardly spaced opening formed in each
holes M are thus also brought into registration
blank at the fold and a correspondingly posi
' with each other forming a composite head l3’, 50
tioned notch in the outer edge of each/of said
adapted and arranged to ?t into socket I6 and
parts forming a projection ?tting into said open
engage opening ll of the other link member to
ing in the other link member when they are
form interlocking elements between the link
assembled.
'
members and providing transverse rivet holes
4. The construction speci?ed in claim 1 in
for the reception ‘of the securing rivets II. In 55
3
2,406,712
which the securing means and interlocking ele
blank at the fold and a correspondingly posi
ments are located on opposite sides of the lines
tioned
notch in the outer edge of each of said
of strain.
parts forming a projection ?tting into said open
5. The construction speci?ed in claim 1 in
ing in the other link member when they are
which said interlocking elements consist of a 5 assembled; and securing means are provided for
head formed at the end of one limb of each link
each limb of said assembled members located on
member and a socket formed at the end and
opposite sides of the lines of strain from said
between the members of the other limb to re
interlocking openings and projections.
ceive the head on the other link member, there
being an inwardly spaced opening formed in each 10
WILLIAM K. ROBBINS.
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