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Патент USA US2404372

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July 23, 1946. '
Filed Aug. 13, 1943
8 Sheets-Sheet l
July 23, 1946.
Filed Aug. , 13,
1943 .
‘a She'e'ts-Sheet 2
4 . T131?
12' ‘
. 46
‘ I ;‘ I: ~lzvwzzrok.v
July 23, 1946.
R. |_. HALLOCK ’
Filed Aug. 1:5, 194s
>8 Sheets'-Shéet 4
July 23, 1946.
Filed Aug. 13, 1943 '
8 Sheets-Sheet e
July 23, 1946..
Filed Aug. 13, 1943
Y‘ 44/4201
64“ -z-;,
8 Sheets-Sheet 7
my 23, 1946.
R. L. HALLock
" 2,404,372
Filed Aug. 13, 1943
8 Sheet's—Sheet 8 '
Patented July 23, 1946
, Robert Lay Hallock, Larchmont, N. Y., assignor to ‘
Elastic Stop Nut Corporation of America, Union,
N. J ., a corporation of vNew Jersey
Application‘August 13, 1943, Serial No. 498,520
23 Claims.
(01. 85-32)
This application is a continuation-in-part» with
respect to my copending application Serial No.
478,408, ?led March 8, 1943, and as to subject
' ensuing portion of this description taken in vcon
junction with the accompanying drawings in
matter common thereto constitutes a division
v I
» Fig. 1 is a perspective view of an installed
The present invention relates to fastening. de
vices and more particularly relates to fastening
devices for joining two or'more bodies together
Figs. 2‘ and
unit 3embodying
are plan and
the sectional
spectively of a stamping or blank for forming
the basket member in accordance with a preferred
by a screw threaded connection such as a bolt or
; ,.
screw and nut. Still more particularly the in 10 method of manufacture,
vention relates to such devices in which the fas
and 3 respectively showing the blank after a sec-,
tening element, such as a nut, is to be held to a
ond blanking operation, ’ V 1
member made of softer material than that of the
Figs. 6 and 7 are views corresponding to Figs. 2,
fastening device, as for example, plywood, plastic
materials and the softer metals such as aluminum 16
and magnesium and the alloys thereof, brass, etc.
and 3 respectively
forming operation,showing the blank after-a first;
Figs. 8 and 9 are views correspondingtoFigs. 2'
The general object of the present invention is to
provide, a new and improved fastening device
which may be ?rmly secured to a'body of softer
and 3 respectively showing the blank after a‘ sec—
0nd and ?nal forming operation,
Figs. 10‘ and 11 are plan and end views respec-v
material, and which will holdsecurely with rela 20 tively
of a fastening unit-comprising. a basket
tion thereto a fastening element such as a nut
member and nut, withthe nut in a'prenmma‘ry
against all normally encountered ‘torque and
assembled position in the basket,’ ’ Y
thrust stresses that may be imposed thereon. To
Figs. 12 and 13 are views corresponding ‘res c
this end the invention contemplates theprovi
sion of an improved form of basket member which 25 tively to Figs. 10 and 11 showing the nut turned
in the basket to an intermediate assembled .posi
can be ?rmly secured to softer material, which
tion, I
_ q.
will e?ectively hold against axialor rotativeldis
Fig. 14 is a plan view showing the baskétlpo'si
placement a nut or the like when, a screw or
tioned over an aperture in a body to which is '
bolt is threaded therethrough, which is relatively
light in weight, whichwill prior to, installation ill?
?rmly but removably grip theifasteninghelement
with which it is intended to coact to-- thereby
readily and cheaply be manufactured from ‘sheet
material withminimum waste thereof by ‘mass
production methods, which requires that only a
single aperture ‘be provided in the body to-which
it is to be attached, which can be securely. at-,
tached'to very thin, plate structures as Welles
to heavier bodies, which occupies minimum space
and which may readily‘be correctly installed by
structureshown in Fig. 15,
. Figs. 17 and 18 are top and end-views respec
be shipped and handled as such prior to installa
tion, which is capable of- being installed with or
without the nut or fastening element being as
sembled therewith prior to installation, which
-wi_ll permit a defective fastening element to be
removed after installation. without permanent
fastening element can be, installed, which can
Fig. 16 is an end view, partly in section?of the,
provide a fastening assembly or unit which can
deformation of the basket so that a replacement
15 is a side , view showing
I unit after a
preliminary settingoperation,
tively of the unit after the ?nal setting operation,
Fig. 19 is a section taken on .the line ,l9-—l9 of
Fig. “17,
Figs. 20 and 21 are views similar to Figs. 2 and 3
respectively, showing a different ‘form' of blank;
Fig. 22 is a view. ofv a blank for forming a basket I
' adapted tobe attached to metal bodies, particu
larly thin metal sheets,
Figs. 23 through 26 are fragmentarysectiorial
views showing a method'of shaping certain parts '
of the blank shown in Fig. 22,
Figs. 2'7 and 28 are elevation and plan views re,
spectively of the basket'fo'rm'ed' from thejblank“
shown in Fig. 22,
Figs. 29 through 31 are views showinglthe'éing relatively inexperienced and unskilled labor with 50
r r
as little as a singleinstalling operation. requiring '
no special tool.
; l
3; I’
t 7
Further and more detailed aspects of the inyenf
tion, together with the advantages to be, derived
stallation of a unit including the basketshown in . '
Figs. 27 and 28,
Fig. 32 is a view ‘of a blank for running a‘ (mg
‘ ent embodiment of; basket,
is‘a plan view of a ‘basket formed’ from’ 7
from its use, will appear more fully fromthe 5.5, theFig..,33
blank of ‘Fig. 32, .
4 .
34 and sides 36 of each notch 32 is approximately
Fig. 34 is a plan view of another form of basket,
120 degrees. The reason for this con?guration
will appear later.
Fig. 35 is a fragmentary vsectional view of a
unit embodying the basket shown in Fig. 34,
. The blank above described is then subjected
Fig. 36 is a plan view of a blank for still an
other form vof a basket,
to a shearing operation for transversely parting
the bridge 22 along the line 40 to provide two
separate legs 42, the free ends of which terminate
in transversely extending feet 44. If-ldesired in
Fig. 37 is a sectional view of the blank after
certain forming, operations thereon,
' V
Fig. 381s a view similar to Fig. S'Tshowingthe
blank after a further shearing operation,
the blanking operations the blank it. may be
scored along lines indicated by the dotted lines
Fig. 39 is a top plan view of the basket in a .10.
' ‘in Figs. 2 and 4 to aid in the subsequent bending
semi-formed stage,
effected‘ by the forming operations.
‘Figs; 40 and 41 are sections showing amethod
of forming the hooks as shown in Fig. 39, , ,
Fig. 42 is a view similar to Fig. 39 showing the‘ I
‘Fig.’ 43 is a fragmentary section showing the
unit comprising the basket and’. a skirtlessnut'i -
7 tion. or: the. blank to form ?ngers Ali‘: while the feet
44 are._ bent downwardly substantially at right
7 ready to be installed,
1 Fig. 44 is a view similar to Fig. 43 showing the
unit installed,
Fig. 45* is a plan-view
angles to the plane of the base as shown more
in Fig. 7.
_ .
20 clearly
' 'In- a succeeding forming operation the wings-28
blank of" still~v an; a
" other‘ embodiment'hof' basket member, ' "
are bent“- upwardly to‘ positions ‘substantially- at
right angles to the base portion, as shown in
Figs. 8' and 91, t-hus‘bri‘nging- fingers til-‘into! opposed
confronting relation'with the notches 32- facing
each other, the wings-with- their associated ?n
,1 Figs. 46 and 4'7 are fragmentary sections ‘show
- ing a‘ method of forming- hooks from the blank
shown injli‘ig. 45, ~
1 Figs‘. 48 and‘ 491are- planviews of the basket
gers/prov-iding what ‘may’ be termed re-entrant
member with‘the'hooks as shown in Figs. 46~and
confronting arm's. In the same operation’th‘e '
prongs 2b‘ are bent downwardly at-right angles
to‘the plane of the base and the legs‘42 are also
‘ 47 respectively,
Figs. 50 and 51 are viewsof a'u'nit‘compri'sing'
b'asketjmember- and nutin- positions ready‘ for
installation" and‘ installed; respectively, and Y
bent downwardly-j butv only; to'-- an inclined posi- '
tion‘ as‘ shown more clearly inv Fig. 91' ,The‘legs'
1 Fig. 52 is a fragmentary view illustrativeof a
‘ 42with7thei'r feet 44' provide what maybe termed
hooks and‘ f or reasons‘ which will hereinafter more
different- ?naljpositioniassumed by‘ feet‘ of“ the
kind shown
Figs; 45 to 511.
fully appear these‘ portions preferably- arei'bent
downwardly‘ to positions such‘ that? theou'ter'cor
i Fig. 1 shows in elevation and in installed‘ po-l
sition one’ form‘ of, fastening device‘ embodying
ners 4'87 ofthefeet? are‘ tangent to a circle indi
the invention-andof a type adapted'tosbe secured
to a body of relatively thick material;
In the ?rst forming operation the blank is
‘shaped to the form. shown in Figs. 6 and '7, the
portions‘ to each side of the notches 35! being bent
up at right angles to the plane of the base .por- ~
cated by? the-‘dotted line 501' which coincides with
the-curved outer walls of the openings‘; [8‘ and 26
vicercomprisescamanchoring or basket member‘ l8
‘secured ,toéa ,sheet1l2 of plywood‘ or other,ma-_
lteri'a'l' ‘softer rtharrthati'of'the member 1H}? and;
- holding in operative pos'tion .a hexagonal-inut'r
l 4-througlrwhieh a:- bolt or screw is vto'be'thread
which; have‘ now" been merged' to' provide a central
' '
The basket member in the form shown in-Fi'gs;
I‘ 8 and 9V is-_ ready
for assembly with the fasten
ing‘ element‘ with‘ which it‘ is to cooperate, which
edif'rorm. below the sheet I! througha- suitable 45 in- the present: instance‘ is- the hexagonal nut M
aperture‘ there-int While in the illustrated‘ ex
, which'ras shown in Figs. 10- and‘ 11: comprises a
amplethe nut, which will be described more vin
‘detail later‘, hasia-hexagona-l- body‘, it willbe un
main hexagonal body portion having the wrench
engaging faces or flats 573‘ and a circular- upper
portion or rim 54'; these two' portions being
and described herein only byway of example and 50
,7 1 joined by a‘ chamfered face 56;!An annular skirt
that the” principles of ‘the invention- may equally
58' depends around'the bore of the nut from the
' ' ld'erstood" that’ thisspecific shapeof nut isv shown‘
well'be applied to other'speci?‘c shapes inputs or
base face; 60.
equivalent fastening elements. '
.member suitable for-use witha hexagonal nut of '
' -
.theibasket in the position shown in Figs. 10 and
11. In this position two diametrically opposed
edges of the hexagonal portion of the nut pro
forming. operations’ which’ will‘ now‘ be described‘
with~ reference‘ to' the‘ production of e, vbasket
. nut and'basket member thenut is ?rst placed in
imeta‘l' and‘ islformed‘ by‘ a series of’ blanking and
1thekind‘ shown in Fig". 1.
In order to effect preliminary assembly‘ of the '
The basket member I'll: is'rnade'r-ifrom ‘sheet '
ject into the recesses 30' in- the arms of the basket
member and the adjacent: flats 53 bear vagainst ‘
In‘ the first‘ operation‘ member el'il' is-blanked'
4'5" adjacent to the
vfaces 62 formed oniingers
‘ out from sheet material‘to havethe form shown 60 notches‘32‘. As will beobservedl'f‘r'om Fig. 10 the
thisv form the‘ blank has a ‘i
in Figs;2"an~d‘ 3.’
centralbase portion 16 in, the central‘ part of
[3" and: 20' are
§ which two- elongated‘ openings,-v
is- left a; bridge
1 formed and" between
i or web 22 from theopposite sides of which pro
At the‘scorners‘ of’ thebase portion
I'G; triangular‘ points, or‘prongs', 26 are formed;
“ Along the major sides of the c'entraliportion', lat
erall'y extending‘ wings tac'are provided‘, each hav
diametrically opposed‘ edges ofjthe nut overlie
therecesses 310 so1 that the extent ‘to which the
nut can be pushed‘ downwardly into» the basket is >
byrabutment' o-fbase 60 of the nut against
65 limited
The length- of' the"
the bottom‘ of these‘ recesses.
isifurther notched‘ asiat‘32‘and,
1 as will be noted from"Fig.- 2, the sides; 34 of:
notches. 32f'are parallel" to; the met-crane of- the
member while the included angle between’isides‘
‘ a the position" relative to the
1 ing'a‘ rectangular " notch- 31's located centrally‘ atv
hematerial'at each side, of each '
1 its outer edge.
of thenotches 30
flange" 5815- made such that when the“ nutis
pushed downwardly as far as" it will go when in
basket member shown
in Fig; lo, the flange will: project through'the
central ' aperture 5-2 in thebaise'p'ortion, as‘ will.
beseen'in Fig. 11, but will not project suiii'ci'ent- ~ '
- ly to: further bendl outwardlyf'th'e depend-ing- legs
A2‘.- ‘In‘ the position of the‘ parts shown in! Figs».
‘ 10'and'1’1" the nut will be properly centered in; the
basket but may be in this position with a rela
tively loose ?t, although if desired theremay be
some measure of frictional contact between the
sides of the nut and the ?ngers. It is to be noted
that in this position of the parts the, arms 28 are
substantially un?exed.
The position of the parts shown in Figs. 10 and
11 is what may be termed'a preliminarily assem
bled position from which the nut is moved. to an
over the aperture in the vsheet before the prongs
26 make contact with the surface of the sheet.
After' the basket has been placed over the aperture and centered by means of the feet it is then
preliminarily ?xed to the surfaces of the sheet by
a blow or pressure‘v which operates to embed-the
‘ prongs-26 in the material of the sheet as shown
in Figs.'15 and 16. This'may be accomplished
any suitable'for'm of forked tool such as
intermediate position of assembly which oper 10'
that indicated by dotted lines 65 in Fig. 15 vwhich
ates to make of the two parts a single unit fric
will bridge the nut and bear against the exposed
tionally held together with sufficient force to con
portions of the centralbase of the basket.
stitute a unitary structure for handling, shipping
With the basket ‘seated flush against the sur
and installing purposes but still requiring fur
face of the sheet, the ?nal installing. operation,
ther change of position of the parts relative to
which operates to lock the basket to the sheet and
each other to a ?nally assembled position ‘when
p which valso operates to move the parts of the unit
the unit is installed. As will be seen from Fig. 11,
to ?nally assembled and substantially locked po
the position of the nut in the preliminarily as
sition; is effected by a blow on thetop- of the
sembled position is such that portions of the'?ats
nut or other pressure which‘ will operate to force
extend above the ?ngers 46 and with the nut in 20 the nut downwardly into the basket until the
this position 'the' ?ats are engaged by a wrench or
base face 60 seats against the central base por
any other suitable tool and turned’relative to the
of the basket. This movement effects two
basket to the position‘ shown in Figs. 12 and 1,3.
things simultaneously. »When the nut is moved
In this position, edges between adjacent flats 53
from the ‘position shown in Fig. 16 to the position
are forcedlinto the notches 32 of the fingers '46
shown in Fig. 181the ?ange 58 of the nut acts to I
and portions of the ?ats are engaged by thesides
embed the hooks formed by the legs 42 and feet
34 and 36 of the notches. It will be apparent
44 into ‘the side wall of the aperture 64,? thus
from, a consideration of Figs.' wand 12 that for
locking the basket against removal axially from
this to beeffected the arms 28 will havert'o be
the sheet unless the hooks are torn forcibly
sprung outwardly as shown in Fig. 13, this being
through the material ‘of the sheet. .At the same
accomplished by what‘amounts to cam action by
time the downward movement of they nut moves
the ?ats of the nut when the latter is'turned.
the chamfer 56 to a position below, the level of
As previously noted, the angle between the sides
34 and 36 of the notches is 120 degreesso that
for a hexagonal nut the ‘sides of the notcheswill
solidly engage the ?atsf Obviously, if the por
tion of the nut to be gripped is of different con
?guration, the notches in the ?ngers 36 should
be shaped accordingly.
With the parts in the position relative to each
other shown in Figs. 12 and 13, the nut is tight
fingers 46 and these ?ngers snap over this cham
fer to engage the circular‘ portion54 of the nut
1 as shown in Figs 17 and 18. As will be more ~
clearly seen from Fig. 1'7 the ?ngers in moving, -
to this position move. so as. to overlie :the hex?
agonal portion of thebody. of the nut and hold it
against axial displacement fromthe basket. under
the in?uence of any normal force likely to be
exerted against. the nut in a direction tending to
ly gripped frictionally by the ?exed arms, 28, and
force it out of thebasket. The‘ flats, lying-beg
due to the fact that the notches 'in'the' ?ngers
the wings 28, serve to prevent ‘rotation of
engage the different faces of thje-n'utand’the
the nut in the basket.
fact that the skirt or shank 58' of _ the nut‘ islor'
v_ V
4.5 ‘ Asiwill-"beobserved from Fig. 19, thelegs- 42 are
cated in the central aperture 52v of the base por
bent ‘on: ai'substantial radius as, indicated at 66
tion of the basket, the nut-is evidently securely
it is inorder to effect this that the openings
held in the basket not only against removal there;
l8 and-20 shown in Fig.2 are made-elongated
from in ordinary handling but also against "cock
rather-(thanhalf-circularin form so that-the legs
ing” in the basket. At the same time the'assern 50 will
be. bent initially from‘ a position outside the
bly is not of a permanent nature to the extent
of the circle 50 (Fig. 8). By bendingthese
that either one of the parts needs to ‘be perma
legs onfan appreciable'radius, any tendency of
nently deformed in order to effect disassembly,
the base portion of the basket to distort or bulge
so that if, for example, it were‘ found after as
is avoided’ and a further embedding of the hooks
sembly of a unit that either one of the parts were
in theisideewall of'the aperture 64 is effected. '
In the device illustrated the ‘nut shown is of 'a ,
defective the two parts could readilyv be sepa
rated and the good part reassembled with va part
replacing the defective one.
known self-lockingtype in which a locking in
sert 68 of ?bre or other elastic material is carried
in the nut body for engagementv with the threads
of a boltor'screw threaded through the nut from
The unit as above described is ready for at
tachment to an apertured body of plywood or
other material softer than the metal of the
basket such as the sheet l2 which, as indicated
in Fig. 15, is provided with an aperture 64 the
the underside of the sheet 'I 2. . In any such instal-v
lation the normal forces acting on the unit will
be axially downward as viewed in. Fig. 19 and the
substantial area of the base portion of the basket
diameter of which is preferably substantially the
same, but with a slight clearance, as the diameter
of the skirt 58 of the nut. In securing the unit
to the sheet, the basket is placed over the aper
affords means ‘for distributing'the load over an
appreciable area ‘of the'surface'of the sheet l2,‘v
thusminimizing the possibility of pulling the unit
ture with the legs 42 projecting into the aper
ture and from Fig. 14 the utility of bending these
legs downwardly to a position such that the cor-,
ners of the feet 44 assume a predeterminedposi
tion relative to the basket will .be-apparent.
From this ?gure it ‘will'be‘ seen that with'the
feet positioned as described they‘will'act ascene
tering members for exactly centering the basket
through the sheet even if the latter is of relatively '
weak material. The unit wilLalso besubjectto
certain torque forces, and effective resistance ‘ato
these forces is effected; even. though theimaterial
of l the sheet is: relatively- soft,. by means 1ofljthe
prongs 26.v which‘ are‘ located at Ya substantial
radius‘ y-from 1 the axis _of_ they :nutl, ;_-jThese, prongs
or their equivalent are notLinall jcases essential,
‘ 7 2,404,372:
central base- portion isalSmpreferabIy provided’.
howeverrsince- the extent as whichthe hooks-are
withreen-forcing ribs. or other-projections to avoid
' embedded in thezwall of theaperture 6G- i-scon- V ‘ possible. distortion of the base when theforce. re:
‘siderable and. if ther‘material of the. sheet. has
any great degree of‘ density and. strength :the
hooks. themselves may well. be ample. to keep? the
unit from. turning, under' the: influence of - any
torquelikely: to be applied‘ to ity in normalservice.
While-,in .its?'nally' installed position the unit
‘ quired
to embedthe prongs is transmitteditcythe
basket from the nut, rather than directly‘ from
‘ an installing’tool as shown inFlg. 15.
In ‘Figs. 2,0» and 211 there- is illustrated‘. a form
‘ ' of blank suitable for single operation installation,
constitutes a substantially locked assembly, itis ,
possible to‘ remove the nut from-the basket for
replacement without injuryto the basket.’ Such
the prongs 26a in this instance; being relatively‘
sharper than the prongs 26 shown in Fig, 2.; ' I.
have found: that prongs having an‘ included’ angle.
I of about 30° will readily penetrate most mate- '
‘removal can be effected. by a combination of
rials softer. than themselvesdueto axial force
torque and axial thrust applied to the. nut up
applied toz-thebasket by the skirt of the‘nut» bear
wardly and away from the basket, asfor example,
15 ing on the legsv of the‘ basket, and will also‘ pro
[by a threaded boltsuch
vide adequate’ holding power against rotational
this: bolt ,isscrewed upwardly into the nutv until
displacement of-the unit.’ ‘Inthe present form‘,v
‘the endof the thread is reached and is then simul-’ ' I the flatV base portion‘ lb of the blank for the/basi- J
forced upwardly the cam
;taneously twisted and
ket member isv also deformed toprovide» reenforcplus- the axial force
actionof the ?ats of the nut the’
gripping ?ngers 20. ing or stiffening projections or ribs tBa'. These.
latter are readily formed by suitably shaped’
: exerted on the under sides of
can be made to force the resilient arms 23 out
‘ wardly to permit the nut to ‘assume. its position of
‘ preliminary assembled relation to the basket as
blanking dies so that no additional manufacture;
ing operations are required. It willbe evident
thatpstarting ‘with a blank-asshownin Figs. 20
and 21', the. subsequent shaping; and-assembling
‘ shown- in Figs. 10 and. 11‘. From this position the
; nut can. readily be withdrawn from the basket;
operations maybe as, previously described. and a»;
‘ Likewise the nut can be removed bya similar com
' description thereof therefore need not be repeat“
1 bination
ed; Installation of} the unit, however, may
7' be 7
made by a single operation‘in 'relativelydense‘
1 bolt into the. nut from the top to a point where
1 thethr'eadv end is reached so that torque ' and
30: material. It is also to» be noted thatif the mate»
'1 axial pull from above- can be applied to the nut.
rial to which the device is to be attached is¢rela~v
3 Replacement of a removed nut from an installed ;
tively-soft, the form shown inFig. '1 and. related:
?gures is capable of being installed by a single
basket; is e?ected in the same way as previously
1 describedin connection ‘with the assembly of an
} uninstalled ‘unit. While the unit might be. re
rllheforms Iof
. ,‘ moved by a strong ‘axiallyapplied'force alone,
7 i as by a blow; this is not desirable since without
1 the cam action on the arms produced by torque
. and tending to spread them, the ?ngers might ‘
‘ be permanently'deformed by thenut.
While, as. previously described, the unit may
1 readilyv be installed by usebf a: iorkedtool for
setting the basket and thereafter by directly
. .
A special tool suitable forzthis purpose is dis
" closed ‘in and forms a part of the claimed subject
V .
' .
are, however, .many- cases where nuts are'req-uired
to be attached to thin metal sheets such as in}
'strument panels'andthe thin metal skin or other:
parts ,of'aircraft. I-leretofore such. installations
haverbeenmade by forming the nut bodywith- one
striking the 'nut ‘with a hammer or, it ‘
may be desirable in some instances, depending .
upon the nature of the nutior other fastening. ele
ment secured in the basket to employ >-a 7 special
are intended primarily for-installation on bodies
of relatively: thick materiali (as distinguished
from thin metal plates.) which is relatively \soft';
such for example as plywood or plastic. There
lugs . or tabs projecting laterally
from ‘the’ base, to provide a- so cal1ed"“anchor V
'or more, thin y
01-. tabs, of which are either riveted:
metal sheet to which the vnut is
- or welded to
nut?’ the tab;
' attached.v Such installations involve a. multi-q
plicity of operations and in the case of riveted
matter 'of .my aforesaid application, Serial No. 50 anchor nuts, require the making of‘ accurately
478,408, of‘ which this is a continuation-in-part.
located. rivet holes.v Moreover, the necessary lat-;
~ I'have found that forlmany kinds ofinstalla
eral extent of the tabs often makes installation
tions, the force required to bend ‘the: depending,
of an. anchor-nut. diihcult if notimpossible-where
space'limitations require a smallsize unit;
hooks outwardly toward their installedv position,‘
The principles of the present invention are
i which force is exerted
move from its intermediate ‘assembled’ position
readily applicable to the production of a device
(Figs. 1'5, 16), iscapable of producing. a down-:
capable of being attached to metal-bodies, inclu
ward: axial thrust- on the basket'member, when
sive of. thin plates, of aluminum or other metal
downward force is exerted on the nut, su?'icient
softer than that of which the basket member. is
60 made, and in Figs. 22 to 28, ‘there is illustrated,
rial to which the basket member is attached be-_
'one'form of device suitable for this purpose; ' '
, As shown in. Fig.' 22, the blank Hi5, advane.
fore relative. movement between the nut and base
to cause the corner prongs to penetrate the mate
ket member operates to spread the hooks and lock
theunitin place. . Thus it is possible in many in
tageously . of steel or’ metal. having equivalent
physical properties of hardness and resiliency, is
stances to effect installation by a single opera 65 cut to. provide a central basevportion I192 andop
posedwing. portions I011, recessed. respectively at
,tion, such. as a hammer blow or pressure exerted
onfthe' nut. or even by screwing a threaded mem-‘
I06- to provide ?ngers , I138. The ?ngers are
ber intothe nut and drawing the unit home by
axial-force exerted on the nut from the member
notched at H9», the: form of therec'esses and.
screwed into- it
'When; it is desired to provide. a unit that is par
' ticularly- adapted? to bersecuredjto'relatively dense
scribed. . Inv the present'case the wings ar'erto'be;
notches in the; wings being as previously, de
bentup'respectively alongi'the" lines l l2 audit will
be' observed that. thev endzedges of-the \tringsare
material by a single operation the basket member
shaped: sondetvhatdi'ffeitently than the" ‘correg.
is advantageously provided withrelatively very
spending edgesain' the“~'previousl'y described form:
sharp‘), prongs 'to_ facilitate penetration and the»
In‘this instance the edges diverge fromthe line
of bending to a place intermediate the height of
for example struck withla‘ hammer, the force of
the‘ blow operatingto movegthe unit to the posi-_
tion‘ shown inFig. '30 without relative movement
between‘the nut and the basket.’ The reason
the wing, as at I I4. The edges of the outer parts
of the wings converge, as at I I6. The reason for
this con?guration will later be explained.
In the center of the base portion the blank is
cut, to provide an aperture I I8 in the form of a
to the conical form. of the hooks formed from
cross, resulting in the formationof four triangu
lar tabs I20, for formation into pointed hooks.
hooks are‘ relativelyrigid; and require a greater
The ends of theblank are cut to ,formoppo
sitely projecting relatively short and blunt tabs
I22, adapted to be bent respectively along the
why. the initialactionisylike this‘isbecause, due
the tabs I20 and bearing-the feet IZUa, thesen
axial-force tobeimposed on them by _‘the skirt
10 58 (of the‘ nut I4 before bendingoutwardly than
is requiredto make the, prongs I48 penetratenthe
surface of-the metalsheet.‘ Followingthis lni-"
tial action, ‘which operates to seat theybase _of
ed hooks are formed to shape from the tabs I20 15 the basket on, the surface of ‘the sheet, the force‘
of, theblow, resisted by the now ?rmly supported
before the wings and the end tabs are bent to
basket; moves the nut relative to the latter and
shape, and one suitable way of forming the hooks
Preferably, although, not necessarily,‘ the point
spreads the books so that the feet I20a pene
is shown in Figs. 23 to 26.v Referring to these
trate the wall of the aperture 64a as shown in
?gures, I26 represents a die‘, having a bore I28
?ared at its upper end by a countersink I30. 20
This movement also causes the ?ngers I08, to
The upper surface of the die adjacent to the
snap :QVBI', ‘the’ top of the nut and as previously
boreis frusto-conical having a surface I32 meet
combination‘of torque and thrust
ing the countersink surface I30 preferably at ' pointed, outha
on the nut enables it to be snapped out, of the
right angles as shown. The blank I00 is ?rst
basket.- "In this connection ityis to be noted that
forced down on the die by a suitable punch (not
once, the basket is attached, the hooks, the feet
shown) to bend the tabs I20 upwardly, as shown
of which are embedded in the aperture in the
in Fig. 23 and then a circular punch I34v is forced
sheet; are su?icientlygstrong to-hold the basket
attached to the plate without?the skirt 58 of a
surface I30 and ‘also shear the tips to form 80 skirted nut of the kind used to apply the basket.
Consequently, if after installation the original
sharply pointed feet I20a. With the ‘feet thus
nut becomes defective forany reason, it can be
formed, the blank is placed over a sectional or
into the bore I28 of. the die ‘(Fig. 24')‘ to bend the
tips of the tabs I20 down against the countersink
replaced by astandard ‘skirtless n-ut, which’ is
of snbstantial‘advantagein (the ?eld Where spe~
split die I36 (Fig. 25) having a bore the upper
portion I38 of which is conical and which is
cial nuts may not be available. It is for this rea
son that; the end tabs, I212 j are} preferably? pro- ‘
conically undercut or counterbored at I40. YA
punch I42 having a frusto-oonical nose I44 is
then forced into the bore to bend the tabs down
vided in order to act asvguidesto prevent the
‘.‘cqcking” of», standard nuts,’ whichlack the skirt
to form hooks having sharply pointed outturned
feet I‘20a as seen in Fig. 26.
that in itself acts asa guide.
, g ;
Figs. 27 and 28 show the‘ blank bent to form» 40 > Inall of the previously described forms of bas
ket ‘member, two parallel and directly opposed
the retaining arms from the wings I04, the ?n- I
nut holding arms ‘have been provided. This ar
rangement may, however, be varied and since-six ‘
sided-Vv or ,f‘hex” nuts are most commonly used,
there is shown in Figs. 32 and 38 another form
ger portions I08 ?rst being bent up and the wings
then being bent up along lines II2, as previously
described. In the present instance, however, the
dies and punches for bending the material along
of basket particularly suited for such nuts. In
this the blank 200. for the basket has a central
these lines are made so that the material is
sheared along the lines I46, shown in Fig. 22, to
provide sharp prongs I48 which projectndown
base‘yportion 202 from' which three. projecting
Wings 204 are formed, these wings being recessed
tojprovide notched ?ngers 208' of the kind pre- 7'
wardly from the plane of the base portion of the
These prongs, as will be observed from
-_ viously described. The wings are. bent up to form
Figs. 27 and .28, are in effect continuations of the
arms having inturned confronting ?ngers of the
kind previously described, between which ajhe'x
nut is inserted ‘in the position shown by the dot
upright or side wall portions of- the retaining
arms of the basket. ‘The metal at the base of
the prongs is not bent or otherwise severely
stressed by this operation and due to the divers
ing end edges II4 of these wall portions the
prongs are solidly backed up by the relatively
rigid side walls and have, therefore, “relatively
great penetrating power without bending or
breaking, in spite of their comparatively small
The tabs I22 at the ends of the blank are
also bent up as shown in Figs. 27 and 28.
In Figs. 29 to 31 is shown the manner in which
the device just described is installed by a single
operation, the hooks having the feet I20a' being
shown rotated at 45° out of their true position for
clarity of illustration. Fig. 29 shows the unit‘of
basket member and nut ready to be attached to
a thin metal sheet I 2a having an aperture 64a
the'diameter of which is only slightly greater
than the distance across the points of opposite‘
feet 120a, so that the latter can function-to cen-f
ted line outline 2 I 0 in
v, .
33, the nut subsequente
1y being'turned to the 1 gripped position shown
by- the "full line 2I2. In the» example shown, the
blank -is provided with a central aperture 2I8
forming three ‘tabs 220 for formation into hooks
of the» kind described in conection with‘ Figs. 23
to 26. ' ‘For assisting in holding the basket against
a rotation, prongs 24-8 are formed to be bent down
for penetration into the surface of the body to
which‘sthe basketis to_be attached. Otherwise,
the_,featuresvof ‘this form of basket and its man
. ner of cooperation with, ‘a nut are as previously
described and need not be repeated. in detail. 1 V
In some cases, it may be desirable to ?x the
.7 basket to a'fcon'vex rather than a ‘?at surface.
and forsuch applicationsit'may be advantageous
7.0. to‘locate the rotation resistingprongs so that they
‘ penetrate close. to the perimeter of the, aperture,
in the sheet to which‘ the basket is?ked. »A form
ter theunit while at the same time having cleare
of basket with prongsilocatedclose' ‘to the ‘aper
ance to movefreely into theaperture. With the
unit placed as shown in Fig. 29, the nut is then 75 ture engaging hooks is shown in Figs.v 34 and‘35.
In‘ this basket the base portion 302-;‘is sheared to
erates to‘ seat the basket on the plate‘ [2a by
causing penetration of the iprongs 448 and which
also, by ?attening the frusto-oonical ring por
, provide» triangular prongs
j trate the ‘surface of the plate i211, adjacent the
1 aperture’liéa. In this instance vthe plate Ila has
1 been shown convexly curved, andlfrom Fig‘. 35vit
" will be- apparent'that prongs located, some» dis-1
1 tance radially away from the aperture would not
tion 450, operates to cause the feet 420a to pene
As WilLbe
} trate the walls of the aperture 64a.
observed from Fig. 43 the pointed feet have what
may be said to be a sharp spade-like con?gura- .‘
‘ fully penetrate the surface,>if at all.
tion. and as they are bent outwardly to engage
Itwill of ‘course be evident that the feet 120a,
the wall ofthe aperture the bevelled faces of the
aperture, will 1 resist
feet assist in causing the feet to dig into the wall
embedded in the 'wallaxial'
of the’
displacement, and. the it:
of the aperture.’ It is to be noted in this connec
tion, however, that the curvature of the legs 454‘
i rotational »as well as
1 resistance-‘against’ rotational displacement may‘
1 be -,enhanced by shaping thetabs 1.20 when 'they ‘
which gives them a conical form makes vthese
parts relatively quite rigid so that they have am
for'medfrcm these tabs, as well as the feet 120a, ‘ ' ple- strength to force th feet into the wall of-the
areplbent outwardlytopenetrate the wall of they
‘aperture.~4 It is-to be noted in this connection, ‘
In this form of the device, the hooks engaging.
however, that for securing the basket to-r?at .
the wall of the aperture are not backed up in their
sheets, the use of prongs-located some distance
spread position by a skirt on the nut but vit has’
from the aperture is usually preferable because
found that the strength of hooks of the '
of the greater moment arm obtainedvfori resist 20' kindillustrated- is ample to prevent them from
ing torque tending; to turn the
bending under the in?uence of any axial force 7
are 'ibent‘ so
that the side edges‘ of the hooks
materialrof the sheet is relatively soft, prongs lo- , '
thatnormallywould be encountered tending ‘to
cated very close to the aperture, or hooks specially shaped/to resist torque as well as axial thrust,
'~ of the plate. ~ The strength of these hooks is such
" may tearthe material of the sheet when prongs
that under excessive axial thrust they willtear
7 located further from
pull or push thevbasket away from'the surface
the aperture’ would hold
through- the metal of ‘a softer plate before bending
‘without tearing underthe same torsional stress.‘
out of their embedded-positions. >
All of the several forms‘ of ‘basket hereinbefore
described are adapted for use with skirted nuts.
This does not require the production of “special?
nuts, since skirted nuts, known in'the trade as.
“clinch” nuts, are used in large quantities andv
are readily available. --However, the invention is
applicable to the production of baskets coopera
ble with standard skirtless nuts to provideunits
capable of being applied in the same manner as
Inthe ‘previously described embodiments‘ the
skirt onthe nut, after‘the unit is installed; oper
ates tor?x the position of the nut laterally with
respect to the basket. ’ For many kinds of uses,
it is desirable for the nut- to have a certain amount
, of lateral play in'any direction in. orderto permit
7 the nut to center itself within the con?nes of
the basket with'respect to a screw or bolt which
may not'be exactly centered relative to the aper
ture in the. plate» to which the basket is ?xed.
' The present form of unit permits of lateral move-v
already described, "and in ‘Figs. 36 through 44 this’
type of unit and its application isshown. Aswill .
be seen from-Fig. 36,v the blank is of the general 46 ment between the nut and basket since after the
form‘previously, described having a central‘ base
nut hasbeen moved to installed position in which
portion- 1102 with oppositely disposed wings 404'
the ?ngers have snapped up over the tops of the
and/recessed at?BB to provide the notched ?n-g
?ats of thenut, the nut is'then free to move lat
gers 4&8. The blank is also formed with the end
erally in the basket provided the basket is formed
tabs 422V and is sheared at MS to provide for the
with suitable clearance between the arms at the'
sides ,of the basket and the retaining tabs at the
ends.v >When such clearance ‘is provided, as is
" Inthis instance: this portion of the blank is
provided with a star-shaped aperture 4l8?from
indicated at 456, the nut may be said to ?oat in
the basket, it being understood of course, that the
amount of the clearance provided in order to
permit the nut to float in the basket is limited to
an extent which will not permit the nut to rotate
the points of which radial slits 4 I 9 are sheared by
a second op‘eratiomso as to provide six tabs 420.
' By means/of asuitable die 4'26 and cooperating
punch 42'l,__the tabs 420'arebent as indicated in
Figs. 39 and 40 to provideupwardly bent por
I between the'retaining arms.
tions at the bases of the tabs which
In some cases’ it may be desirable to attach a
form a frusto-conical surface 450 interrupted by
basket to a plate or other body of material, the
the slots 452Iresulting from the spreading of the
hardness of which is only slightly less than that
slits 1H9. The tipends‘of the tabs 420 are bent
of'the'material of which the basket is made, and
downwardly to form the leg portions 4540f the
in Figs. 45 through'52 there is shown an embodi
hooks and as seen in Fig. 41 thejtips are sharp
ment particularly suitable for attachment to
" ened into pointed feet
bodies of relatively hard material, as for ex
434 cooperating with the die 426.. After these 60 ample heat treated aluminum alloys. In this
pointed feet have been formed, the' leg portions
embodiment, the blank has a base portion 502v
"1.154 are bent down was to depend vertically as
from which extend wings 504 having ?ngers 508,
and'e'nd tabs522, aspreviously described; In the "
shown in Figs. {i2 and 43. It will be understood
that by suitable bending operations thewings‘of
the'blank are bent to provide the nut retaining
arms and ?ngers as previously described.’
65 present instance the blank is ?rst punched to
In Fig. 43, the basket is shown located over a
plate 12a having an aperture 64a ready to be in- '
stalled by the action of a skirtless nut Ma which
is" in assembled position in the basket, as pre
viously described, with the base of the nut rest
ing on the uppermost portions of the bent tabs.
In Fig544; the ‘unit is shown in installed posi
tion, installation having for example been ef
provide a central aperture 5I8 shaped to providev
six_equi-distantly spaced recesses separated by
sharp points 5'2l. Radiallyoutwardly from each
of these points a small hole 558' is punched and
after these holes have beenformed the base is slit‘v
along the lines 5 l 9 by a shearing operation. This
result'siin the formationiof siX tabs520 each‘ of‘
which has at its free end a pair of spaced sharply‘
pointed feet {29a} "As seen in’ Fig-46; the tabs‘
are bent "sol-that their: root 5 portions ‘form ‘a >
, fected by a blow on the top of the nut which‘ op 75
2,404,372 a
frusto-conical surface 550 as previously described
in connection with Fig. 4.0. In this instance, how
ever, the leg portions are convexly curved in ver
tical plane as shown at 554-, the feet vI 20a- being
sheared by a punch 534 as previously described.
The tabs are then bent by a subsequent form 5
ing operation to the form shown in Fig. 47 by
great, the number of feet which it is possible to
employ is such that the total holding power is
sufficient tolretain the basket against axial. dis
placement by any force less than :that required‘
to tear the feet through the metal of the body to
which the basket is attached.
In the various drawings herein referred to, the
means of a suitable die 56:) and punch‘ 562.
scale'is substantially larger than~many of'the
Fig. 48 shows in plan view the shape of the
tabs in the intermediate state shown in Fig; 46 10 units actually used. ‘Such units are of particu
lar utility in small sizes wherein for example the
and Fig. 49 shows in plan view the ?nished form
basket member may bemade of sheet‘steel as
of the basket with the hooks corresponding to
thin as .020 inch, with the hooks short enough
theform shown in'Fig. 47. From Fig. 49 it will
to engage-the aperture wall of sheets as thin
be seen that the feet at the ends of the-tabs curve
radially outwardly.
I ~
as .025-.040 inch. While'in all cases it is desirable
‘In Fig. 50, a unit consisting of the basket and 15 that the feet penetrate the wall of the aperture
it will be clear that an e?ective attachment can
a skirtless hex nut l4a‘is shown in position to be
be made even if the sheet is so thin thatthe
attached to plate In and’ in Fig. 51 the-unit is
feet project partially or wholly on there'verse side
shown in installed position. As will be seen from
of the sheet. In such cases the resistance'of the
Fig. 51, the sharply pointed feet are forced'into
the wall of the aperture 64a at a downwardly no feet to torque on the unit is diminished, which
sloping angle, this form of attachment being ef
is undesirable.
so that when the downward force'for' attaching
the basket is transmitted through the nut the
prongs 548 penetrate plate I2a so that the-basket
is seated ‘or substantially seated before the frusto
conical roots 550 of‘ the hooks bend to fo'rcethe'
feet outwardly into the material of the plateJ- 1
various features of ' the invention in different
combinations, and in certain instances using some
of such features to the exclusion of others, may
be produced withinthe scope of the invention,
which is to be understood as embracing ‘all forms
of devices falling within the purview ‘of the ape
In some instances it may be‘desirable to‘cause
pended claims.
more directly radially outwarddirec- I
What is claimed is:
tion so that they assume the ?nal posr'ltioriiindi
cated in Fig. 52. This is readily accomplished by
proper selection of the size of'theholes 558; ‘The
consequently weak sections at the roots of the
hooks, bending of the hooks to force the- feet out
ferent speci?c forms of devices embodying the
the feet of the hooks to penetrate the wall of-th'e'
larger these holes‘ are made the weaker become
the sections" at the roots of the tabs520 and con;
sequently the books‘, will bend at their roots upon
the application of less force than if holes 558‘were
smaller. Thus, withrelatively large holes 558 and
From the foregoingdescription of numerous
embodiments it will be apparent that-many dif
fected ‘by making' ‘the-hooks» sufficiently ‘strong
1. A basket member for attaching a fastening
element to a body havingan aperture, ‘said mem-_
ber including means'eng‘aging'said element to
hold it in assembled relation with the basket
member, means for penetrating the/wall of said
aperture to hold the basket member in assembled
relation with said body and means for penetrating
engagement with the surface of said‘ body to re~
strain the basket member against rotation. ‘
2. A basket member for attaching. a fastening
ade to occur before su?icient
element .to an aperturedfbody of material "softer
prongs 548 very far into the surface ‘of the plate. 45 than that of the basket member, said member
including an apertured base portionfor engag
Only a small amount'of bendingv of the hooks is
ing the surface’ of said body, prong portions pro
suf?cient to'cause the feet lZlla to engage the wall
jecting downwardly from said base ‘ portion ‘for
of the aperture, such engagement'taking place
penetrating engagement with the surface of said
under the assumed conditions before the} base" of
force has been applied to the‘nut to force the
the'basket has been seated on the surface of ‘the 50‘ body, additional downwardly projecting portions
having their free ends positioned to substantial- '
1y engage.
H the
wall of' an aperture in said body
basket, in order to seat itself on the plate, after
when inserted herein, whereby to guide said bas-v
the points of the feet have engaged the wall of
ket member. and center the aperture in the base
the aperture, in conjunction with the further
bending action incident to the ?attening out of 55 portion thereof with respect to the aperture
plate. The further downward movement'qf. the
the frusto-conical portions of the tabs, will oper
said bodybefore said prong portions engage'the
surface of said body, and portions projecting up
ate to cause the feet to dig into the wall of the
wardly from said. base portion for holding a fas
aperture while at the same time bending up
wardly to a position such as is shown in Fig. 52.
tening element in assembled relation with said
basket member.
It will thus be seen that the amount of force
3. A basket member for attaching a fastening
required to bend the hooks outwardly can read
element to an apertured body of material softer,
ily be varied so that any desired relation, between
than that of the basket
this force and the force required to cause pene
including an apertured b ' member, said member, .
tration of the prongs 548, can be secured. From
this it ‘follows that by proper selection of di
mensions the penetration of prongs and the feet
can be made to occur in sequence, or moreor
penetrating the surface of said body to restrain
said member against turning relative to said body,
means for engaging and penetrating the wall of
less simultaneously, as desired.
an aperture in said body to restrain said member
It will be apparent that in this form of the
against axial displacement from said body and
basket, a large number, in this case 12, of very
sharply pointed feet can be provided, which are 70 means for engaging a fastening element to ‘hold
it in assembled relation with said member.
capable of penetrating material which is not a’
4. A basket member for holding a‘ nut having
great deal softer than the material of, which the
,a polygonal body portion comprising a base por:
feet are made. Even though'individual feet‘ are
tion, and a plurality of spaced resilient arms proL'
quite small and the extent of‘ the penetration not
75 jecting upwardly from said base portion, said
‘arm's ‘having :i'ntur'ned notched ?ngers to grip
into 1a basket member-for ‘attachinga‘nut or the
like to a (body of softer material, comprising a
plate "having a central base portion, wing ,por
tions extending from opposite sides of said base
portion, the outer edge of ‘each wing portion be
‘ i'ping-ly engage between them the corners formed.
;by the intersections of‘a plurality ofthe ?ats'iof
"said bodyportion when the nut »_is,, inserted be
‘ tween saidiarms.
ing-centrally recessed to providev oneachowing
two spaced projecting corners, said wings vbeing
adapted'to be bent upwardly from said base :por
tion to provide resilient arms and said vcorners
being ‘adapted to be ‘bent inwardly over said base
‘ , 5. A basket member‘for holdinga nuthavi-ng
, , a'polygonal 'body'portion comp-rising a base por
tion and resilient arms at opposite sides ofrsaid
7' base portion, said arms carrying spaced. ?ngers
located in, confronting relation and said ?ngers
5 being notched togrippingly engage'betweenthem
portion to provide spaced ‘confronting ?ngers for
gripping g-a =nut between them ‘at a plurality of
spaced places, said base portion having 'a cen
trally ‘located ‘bridge with an ‘aperture at each
, the corners iormedby the intersections ofi-a plu
? rality of the ?ats of said body portion when the
nut is inserted between said arms.
I v
side thereof and said bridgebeing adaptedto
be transversely par-ted to provide two legs adapt
ed to be bent down to _~for;m hooksdepending-rrom
V 6. A basketimember for holding afeut having a
' 1 hexagonal body portion comprising a'baseportion 1
and parallel resilient arms at opposite “sides of
the‘ perimeter ‘of 'a central "opening for-med by
spaced‘ confronting
, saidebase ,portion carrying
1 ?ngers at ‘their free en ,ds', said ?ngers being 20
notched to engage ‘the ?ats of said‘body when
the'latter is located between the arms with cer,_-,
tain of its ?ats parallel with-said arms and said
arms being recessed to permit the nut-to be in
serted to a limited extent between said arms in
a'di?e‘rent' position of rotationin ‘which corner
portions of said body overlie" the recesses in said
, __
12. *A sheet metal blank adapted to be formed
into ‘a basket member for attaching a nut or the
like to a body of softer material, comprising a
base portion having extending triangular sharp
corners adapted to be bent down to form prongs
25 for penetrating“engagement- with said body, a
‘ arms, said arms being resilient 'and’adapted to be
?exed outwardly by said body when the latter is'
1 7 turned from its ‘inserted position ‘to the ?rst "men
themerg-ing of said apertures.
centrally located’ bridge having an aperture at
each side thereof, said bridgebeing ‘adapted to
be transversely parted to provide twolegs adapt
ed to bed-bent downwardly from the perimeter 6f
the opening “formed by the merging oi said aper
tioned position in which the ?ats are ~_ené;aged'by
tures, and wing portions at opposite sides of said
the notches in said ?ngers.
‘base portions adapted to be ‘bent upwardly and
'7. A basket member for holding ‘a nut having a ' shaped to ‘form arms for holding a nut in position
hexagonal body portion comprising abase por
over-said opening.
tion and'three equidistantly spaced resilient a'rms
i3.'Afastening unit comprising, in combina
carrying spaced confronting ?ngers at their free
tion, a . basket 'n'ie‘mberv and a fastening element,
ends, said ?ngers ‘being notched to engage the
said basket member having resilient arms ‘pro
viding in urned ?ngers for gripping said element
between them, said element ,havingya body por
tion of non-circular'perimeter, said ?ngers be
ing spaced to permit said body portion tobe
?ats of said body when the latter is located be
tween the arms with certain of its “?ats parallel
with said arms and ‘said'arms ‘being recessed to
' permit the nut to be inserted to a ‘limited extent it
between said arms in'a‘different position of me
inserted therebetween in a ?rst position of ‘rota
tation‘in which corner portions of said body over- I
lie the recesses in said ‘arms, said arms ‘being re
silient and adapted to be ?exed outwardly by said
"body when the latter is turned from its inserted
position to the ?rst mentioned position in which
basket member
in which
' "
gaging and spreading said fingers to ?ex said
arms when turned to a second position of rota
the?ats are engaged by the notches ‘in said ?n:
8. A basket member including a base ‘portion’
having an aperture, retaining portions extending
upwardly from the base portion for holding a
fastening element, and a plurality of hooks ex
tending from the periphery of ‘said aperture, the
the minor diameter of the non-circular body
portion is between said ?ngers and the non
circulai- perimeter of said body portion en
,root portions of said hooks being bent upwardly
ti'oiiin which the major diameter of the non-cir
cularv body portion is between said ?ngers, where
h by to hold the parts in frictionally engaged as
séiiibled relation.
,14. A fastening unit comprising a basket mem
ber- and a nut having, a polygonal body portion,
said basket member having resilient arms pro
viding inturned ?ngers for gripping said nut be
tween them, said ?ngers being spaced to permit
the insertion of said nut between them in’ one
position of rotation relative to said basket meme
from the plane of said base portion and the leg 55
portions of said hooks being bent downwardly
to depend below the plane of said base portion,
whereby to provide portion-s adapted to move
outwardly for engagement with the wall of an
her and being notched to engage a plurality of
aperture in a, body'to which said memberis to 60
the ?ats of said body portion in a second‘ ,posi-l
’ '
be attached when the root portions elf-said hooks
tion of’ rotation in which said arms are ?exed
' are bent down into the
away from each other to cause said ?ngers to
grip the nut between them to hold
9. A basket member as set forth in claim 8, in
parts in assembled relation and to restrain
which the envelope of the upwardly bent root 65 the
the nut against turning relative to said basket
portions of said books is a frusto-conical surface.
_ 10. A basket member of the-character described ,
comprising a base portion, means including an
arm portion bent upwardly froin'the plane of
l the base portion ‘for engagement‘with a fasten
ing element in the basket vand a prong constitut
ing a continuation of said arm ‘portion project
ing downwardly below the plane of said base por
15. A fastening unit comprising, in combina
tion, a basket member adapted to be secured to
another body, said member having a base por
70 tion and resilient arms projecting therefrom pro
vided with inturned ?ngers at their free ends,
and a fastening element inserted between said
Y ?ngers, said element having a base adapted to
ll. A sheet metal blankadapted to be formed 75 seat against the base portion of’ said basket mem
ber and having a non-circular body portion fric
tionally gripped between said fingers when the
it in assembled relation with said basket member
and to permit it to be disassembled therefrom
base of the element is spaced from the base por- ~
due to the spring action of said arms and means
tion of said member, the axial extent of said
projecting from the side of said base portion op
body portion being such as to permit said ?n
gers to move inwardly to overlie a portion of 5 posite said arms for penetrating the wall of said
it when said element is moved inwardly to seat \ aperture to hold the basket member in assembled
relation with said body.
its base on the base portion of said basket mem
20. A basket member for attaching a fasten
ing element to an apertured body of material
16. A fastening unit comprising, in combina
softer than that of the basket ‘member, said mem
tion, a basket member having an apertured base
ber including an apertured base portion for en
portion, hook portions depending from the pe
gaging the surface of said body, resilient arms
riphery of the aperture adapted to be spread to
projecting upwardly and inwardly from said'base
engage the wall of an aperture in a body to
portion and overlying a portion of said element
which said member is to be secured and resili
ent arms provided at their free ends with in 15 to releasably secure it in assembled relation with
the basket member and to permit its removal
turned ?ngers, and a fastening ‘element compris
therefrom due to the spring action of the resil
ing a non-circular body portion having a base
ient portions, and hook portions projecting
adapted to engage the base portion of said mem
downwardly from the periphery of the aperture
ber and a skirt depending from said base adapt
ed to pass through the aperture in the base por 20' in said base portion for penetrating the wall of
an aperture in said body to hold the basket mem
tion of the basket member to spread said hook
ber in assembled relation therewith.
portions, said element being inserted between
21. A basket member for attaching a fastening
said arms and said body portion being frictional
element to an apertured body of material softer
ly gripped between said ?ngers with said skirt
than that of the basket member, said member
in registry with the aperture in the base portion
including an apertured base portion for engaging
of the basket member and with the base of said
body portion spaced therefrom, the axial length
of said body portion being such as to permit said
the surface of said body, resilient arms project
ing upwardly and inwardly from said base por
tion and overlying a portion of said element to
fingers to move inwardly to overlie a portion of
it when said element is moved inwardly to ‘seat 30 releasably secure it in assembled relation with the .
basket member and‘ to permit its removal there
‘said base on the basket member and to cause said
from due to the spring action of the resilient
skirt to spread said hook portions.
portions, and hook portions projecting down
‘17. A fastening unit comprising, in combina
wardly from the periphery of the aperture in
tion, a nut and a basket member adapted to be
said base portion, said hook portions having out
secured to a body having an opening therein, said
wardly projecting pointed feet at their free ends
basket member having a base portion provided
for penetrating the wall of an aperture in said
with an aperture adapted to register with said
body to hold the basket member in assembled re
opening, portions depending from‘ the perimeter
lation therewith.
of said aperture for insertion in said opening and
‘22. A basket member for attaching a fasten
upwardly extending resiilent arms frictionally
ing element to an apertured body of material
gripping the body portion of said nut between
softer than that of the basket member, said mem~
them over said aperture, said nut having a de
ber including an apertured base portion for en
pending skirt adapted to pass through said aper
gaging the surface of said body, resilient arms
ture and into said opening to spread and cause
projecting upwardly and inwardly from said base
said depending portions to penetrate the wall of
portion and overlying a portion of said element
said opening when the nut is moved to a position
to releasably secure it in assembled relation with
in which the base of said body portion is seated
the basket member and to permit its removal
against the base portion of said basket member.
_ therefrom due to the spring action of the resil
18. A fastening unit comprising, in combina
tion, a nut and a basket member adapted to be 50 ient portions, and hook portions projecting down
wardly from the periphery of the aperture in said
secured to a body having an opening therein, said
base portion, said hook portions having trans
basket member having a base portion provided
versely extending feet at their free ends for pene
with an aperture adapted to register with said
trating the wall of an aperture in said body to
opening, portions depending from the perimeter
of said aperture for insertion in said opening and
hotldh. said member in assembled relation there
upwardly extending resilient arms frictionally
23. A fastening unit comprising, in combina
gripping the body portion of said nut between
tion, a basket member and a nut, said member
them over said aperture,‘ said nut having a de
having an apertured base portion, nut retaining
pending skirt adapted to pass through said aper
ture and into said opening to spread and cause
said depending portions to penetrate the wall of
said opening when the nut is moved to a‘position
in which the base of said body portion is seated
against the base portion of said basket member
and said arms carrying inturned ?ngers located
to overlie parts of said body portion when the
nut is moved in the latter position.
19. A basket member for attaching a fastening
element to a body having an aperture, said mem
ber including a base portion and resilient spring 70
portions, and bent hook portions depending from
said base portion at the periphery of said aper
ture, the roots of said hook portions being bent
to project above the plane of said base portion
for engagement by the base surface ‘of said nut
to spread the free ends of said hook portions out
wardly for engagement with a body to which the
unit is to be attached upon axial movement of the
nut relative to the basket to seat the nut and
thereby cause said roots to be bent into the plane
of the base portion of the basket.
arms yieldably engaging saidelement to secure
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