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- Dec. 31, 1946.
‘ 2,413,510
R. w. LUCE
FAS TENER
„2
Filed March 25, 1942
18
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INVENToR.
_
@CHA/20 1MM/CE
A.
BY
fw _
ATTORNEY
2,413.5?.0'
Patented Dec. 31,` 1946
UNITED STATES ' PATENT OFFICE
2,413,510 `
l.
ì
FASTENER
`
l Richard W. L_uce, Southport, Conn.'
Application March 25, 1942, Serial N0. 436,117
23 Claims. (C1. ,g4-_221)
The invention herein disclosed relates to a fas
tener of the kind that is commonly termed a cowl
fastener.
'
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f
Fasteners of the kind mentioned are generally
designed and constructed such that the engag
ing parts thereof may be readily and easily re
leased and reengaged.
Such fasteners are uti
2
These objects and certain advantages that will
hereinafter appear are realized in the embodi
ments of the invention illustrated in the accom
panying drawing and described'in detail below.
rlîhe drawing includes:
Fig. 1 which is a plan of a cowl fastener con
structed in accordance with this invention;
Fig..2 which is a transverse section of the same
lized to secure cowls or covers whichV when re
taken on the line 2_2 of Fig. l;
moved access may be had to mechanism ’covered
Fig~ 3 which is a plan of the same partly in
thereby. For this purpose, such fasteners are 10
used extensively in airplane construction and
vfrequently consists of two interengaging parts,
section;
e
'
Fig. 4 which is a section taken on the line 4-4
ofFig. l; and
.
'
one of which is rigidly secured to one of the ele
Fig. 5` which is an end elevation of resilient
ments or -members to be secured together and
the other of which isprovided with a head for 15 washer forming a part of the construction.
engaging the other member.
'
In a fastener of this kind, it is desirable that
a cushion be provided against repeated shock
loading to which a rigid fastener is repeatedly
subjected in use. And in additionthe parts must
be locked in fastening position to prevent rela
tive movement and consequent loosening and sep
aration under the forces resulting from vibration
and shock.
As such fasteners have been con
The cowl fastener illustrated in Figs. l to 4
includes a fastener element and a device for re
taining the fastener element. The latter com
prises a base la having oppositely extending
wings l with openings therethrough, through
which openings 2a rivets 2b extend to secure the
base to a plate 2 which constitutes one of the
members- to be secured together. The plate 2
generally constitutes a rigid part of the structure
structed, heretofore. and prior to the invention 25 and'to this plate a cowl or other cover repre
sented by a plate 3 is secured by several fasten
herein disclosed, they include a ,single resilient
.element that is arranged such that iteifects the
ers of the kind herein disclosed.
The base has
a central substantially circular section 4 from
locking of the elements in fastening position and
which the wings l extend. Centrally of the sec
also carry the load. In some instances, the re'
silient element forms one of the interengaging 30 tien d, the base is provided with an opening 5
which, when the base is secured to the plate 2,
elements of the fastener and it is directly- and
is axially alined with an opening 6 in the plate 2.
.rigidly secured to one of the members to be fas
These openings are provided to receive the fas
tened together. In other instances, the 'resilient
tener' 'l which extends through an opening 8 in
element is arranged to >act between the'two ele
ments of the fastener, one of which is4 rigidly » the plate 3 and the openings 5 and E. It is to be
noted that the ropenings 5 and ß are substantially
secured to one ofjthe members to be secured
larger than the opening through the plate 3
together. The resilient element in this latter
which may be countersunk as indicated.
construction serves to maintain the two elements
On. opposite parts of the'circular sectionV Il,
of the fastener in locked interengaging relation
40, there are provided arcuate edge flanges 9 and
and alsocarries the load. '
'
w
_
An object of this invention isito .provide a cowl
fastener that includes a resilient' cushion ar
lll extending - perpendîcularly from the base.
Each of these flanges extend along an arc of ap
proximately ninety degrees. From the flange 19,
ranged to accommodate variations in thickness
two tongues or tabs ll and l2 extend. Like tabs
Aof kmembers tor be fastened‘f-together and toY pre
-vent shock loading of thev fastener in service. 4:5 er extensions I3' and i4 extend from the flange
ill'. These tabs when bent inwardly, parallel to
Another object of the invention is to .provide a
the base, serve to hold a fastener retaining mem
fastener of this kind in which the locking of the
ber secured to the base.
elements in fastening position is independent of
The retainer member is constructed from a
the'cushion for absorbing the shock loading. A
further objectof Vthe Vinvention is to provide a l single piece 'of metal and includes a substantially
circular section l5 that is received between the
fastener of this kind that is so constructed as to
flanges 3 and it and over which the tabs extend.
_have the property known as “float`,” that is such
.VTheï-diameter ofthe circular section l5 is less
' .that _the secured» element is shiftable‘ to .takecare
>-of sllght. misalinement in the fastener openings ^ than the insidediarneter of the flanges 9 and Il)
55 sothat the section l5. has limited movement with
in the members to be fastened together.
2,413,510
3
4
respect to the base in all lateral directions. Cen
is between the stops and the detents 25 and 26
trally of the circular section I5, there is formed
(see Fig. 1) . The spring elements with the detents
on the section I5 a boss I6, pierced centrally
so engaging the pin secure the fastener 1 against
thereof to provide an opening for the fastener
accidental movement under the iniiuence of
and arranged to provide two oppositely inclined, 5 forces resulting from vibration and shock ordi
inwardly extending surfaces I1 and I8 which in
narily encountered in service, The fastener 1
effect form partial convolutions of a helix in
is however readily turned to release position by
oppositely directed planes inclined to the surface
the application of manual force as through a coin
of the base. Intermediate the ends of these sur
inserted in the slot in the head.
faces, which constitute rigid cam surfaces, the 10
The spring washer 21 interposed between the
base of the boss I6 is slotted as at I9 and 20.
base and the retainer member serves two purposes.
The end edge of each inclined surface, the end
Frequently, plates of a speciñed gauge or thick
edge distant from the plane of the circular sec
>'ness vary slightly in thickness. The washer 21
tion I5, is provided with an extension, extensions
accommodates such tolerances in plate thickness.
2l and 22, which extends substantially perpen 15 In addition, during service, particularly on air
dicular to the surface and constitutes a stop.
planes, fasteners of this kind are repeatedly shock
At diametrically opposite points, the section I 5
loaded. The spring 21 acts as a cushion to ab
is provided with extensions 23 and 24 whichex
sorb the shock and the fastener is not therefore
tend between the fianges 9 and I0 and are re
subjected to repeated shock loading.
versely bent to form resilient spring sections axi 20
It will be observed that the locking spring ele
ally spaced from but in cooperating relation with
ments23 and 24 are so related to the fastener
respect to the inclined surfaces I1 and I8. The
that they are not -affected by the load. Their
end edges of the resilient elements 23 and 24 are
only function is to hold the detents 25 and 25
.shaped as indicated in Fig. 1 to provide an open
in position to retain the fastener 1 in fastening
ing for the end of the fastener element 1, Inter 25 position on the inclined surfaces I1 and I8. If the
mediate the side edges of the element 23 a, detent
spring 21 should fail under repeated shock load
25 is :formed therein which extends in the direc
ing, it has no effect upon the locking action of
tion of the inclined surface I1 and to the end edge
the spring elements 23 and 24 and there is, there
of the element 23. A similar detent 26 is formed
fore, no danger of the fastener loosening and sep
in the resilient element 24.
30 arating.
Interposed between the retainer member, the
Generally, a number of such fasteners are uti
sectionv I5 thereof, and the base, the circular seo
lized to retain a cover plate or cowl in position. In
tion 4 thereof, there is a resilient washer 21. Pref
most instances, the several holes in the cover plate
erably, this washer 21 is, as illustrated in Fig. 5,
3 do not all accurately aline with the correspond
sinusoidal in form to permit the retainer mem 35 ing fastener holes in the rigidly secured plate 2.
ber to move, a limited amount, towards the base,
The float of the retainer, the ability to move a
and to provide a resilient force normally separat
limited extent in all lateral directions, serves to
ing and tending, under load, to separate these
accommodate any such misalinement. In addi
members axially of the openings therethrough.
tio-n, the provision of rigid inclined surfaces pro
The device above described is adapted to be used 40 `vides a rigid securing of the plates together in
with the fastener 1 to secure two members to
the manner, for example, of a nut and bolt.
gether, The fastener 1 primarily consists of a
It will be apparent that other resilient members
rod headed at one end to provide a head 28. The
might be used to replace the washer and, for ex
head 28 is slotted diametrically, preferably with
ample, resilient tongues might well be cut in the
a concave slot 2S which will receive the edge of f’ ’ retainer 'element and extend therefrom towards
a coin. Adjacent the opposite or unheaded end
the base. As the retainer member is preferably
of the rod, a pin 33 extends through the rod di
made from heat treatable steel and is heat treated
ametrically thereof. Preferably, the rod is first
such tongues would provide the desirable resil
inserted through the opening 8 in the plate 3
iency.V It will also be obvious that various other
and then the pin is driven through an opening 50 changes may be made by those skilled in the art
provided therefor in the rod. The fastener ele
in the details of the embodiments of the inven
ment is thus retained by the plate 3 when the plate
tion Ydisclosed in the drawing and described
is removed.
above within the principle and scope of the inven
In securing the two plates together, the fas
tion as expressed in the appended claims.
tener 1 is entered through the plate 2, the base,
I claim:
the washer 21 and the retainer member. To ex
1. A device of the kind described comprising in
tend through the floating member, the pin must
combination a base adapted to be secured to one
be alined with the slots I9 and 20. In this posi
of two members to -be fastened together, the base
tion, with the plates in contact, the rod extends
having an opening therethrough, a surface ad
through such that the pin is in position, shown in 60 jacent said opening, shiftable with respect there
>broken lines in Fig. 3, and in a plane to engage,
to and inclined to the plane o-f vthe base, and a
upon rotation, the inclined surfaces I1 and I8.
resilient element adjacent the inclined surface
The fastener 1 is then rotated counterclockwise,
and spaced therefrom axially oi' the opening
as seen in Fig; 2, and the pin 30 rides up the
through the base, the resilient element being po
inclined surfaces, drawing up the fastener, and
sitioned to engage a member moved along the in
drawing the plates 2 and 3 together, The de
clined surface.
tents 25 and 26 of the spring elements 23 and
2. A device of the kind described comprising in
24 are spaced, axially from the inclined surfaces,
combination a‘ base adapted to be secured to one
a distance less than the diameter of the pin 3Q;
of two members to b'e fastened together, the base
As the pin is moved around, and engages the de
having an opening therethrough, -a member se
tents, the spring elements are forced axially and
cured to the base yand having limited movement
snap in position behind the Din. The fastener is
with respect thereto in all lateral directions, said
turned until the pin engages the stops 2I and 22
member including’an inclined surface for engag
and when in this position, the plates 2 and 3 are
ing a fastener entered therein, and means for
firmly secured together. In this position, the pin - Ol retaining a fastener engaged by the inclined sur
¿2,413,510
through` thebase, inclined, .helical surfaces ad
iacent the opening and spring sections arranged
.face and in fastening position on. theînclined
surface.l
1 .
,in juxtaposition withrespect to the inclined sur
3~. A device of the; kind described comprisinggin
4combinatien Va base adapted to beSeQllIîed to one
ffrìße.
base having an opening for a fastener, and a mem
ber securedto the base and having limited move
ment with respect thereto in all lateral directions,
vthe-,member including a section _arranged parallel
.to the base havingan opening therethrough sub
stantially alined lwith the opening >through the
baserinclined, helicalsurfaces adjacent the open
ing and spring sections arranged in juxtaposition
with respect to the _inclined surface, _and resilient
meansacting between the base and the member.
arotary v,operative fastener of the type
_1,1
clined fastener engaging su-rface for engaging a
fastener entered therein and resilient members
`overlapping the inclined surface for engaging an
`element of a fastener riding on the inclined sur
-
4. A device of the kind described comprising a
base adapted to be secured -toone of two members
to be fastened together the base having an open
ing therethrough to receive a fastener, a member
>shifi‘ably secured to >the base, resilient means
spacing the .member and the base axially of the
opening through the base, the member including
2.0
.a rigid inclined fastener engaging surface for en
gaginga fastener element entered in the device.
'
y
.in combination abase adapted to be securedto
Oneof two members _to be fastened together,> the
having an opening therethrouglrto receive a fas
tener, and a member secured to the base andhav
ing >limited movement with respect thereto in_,all
lateral directions, said member including anin--
face.
,
n IQ. A device ofthe kind described comprising
of two members tobefastened togethen the base
5. A device of the kind described comprising in
combination a base adapted lto be secured to» one „ ,
of two members tofbe fastened together, the base
having an vopening therethrough to receive a co
operating fastener element, _a member shiftably
.secured to the base and including a rigid fastener
engaging surface arranged to cooperate with a
fastener, and means in cooperating relation with
`respect tothe fastener `engaging surface for re- l
taining a fastener engaged by the fastener en
gaging surface in' fastening position.
y
6. A-device'of ythe kind described comp-risingin
rcombinaticm a base adapted to ‘be secured to one
V.of two members to be fastened together, the base
having-'an openingtherethrough to- receive a coop
comprising „a rotary studformed with a radially
extending arm and a socket member formedwith
a. base shiftably attached to an apertured sup
port and adapted _to interlock with the stud arm
upon turning movementof the latter, of an at
taching member ,comprisingl a plate secured to
>said suppQrt, said plate being formed with op
r.posedchannel-shaped guides loosely encompass
ing portions of said-socket member.
,1.2. ,In a rotary roperative fastener of the _type
comprising a ro-tarystud formed with a radially
extending arm and a socket member formed `with
a base* shiftably attached to an~ apertured sup
DOlît and adapted _to interlock with the stud arm
upon turning movement of the latter, of an at
taching Amember comprising ar plate secured to
said support, the sides of said plate intermediate
ythe'fastening'attaching said plate „to said sup
-port being. channelled for shiftably receiving a
portion of »said socket members.
13. A1n a rotary operative fastener of the type
cured to the base> and includingvra, rigid fastener di] comprising a rotary stud formed with a radially
extendingarm anda socket member formed with
_engaging surface arranged to cooperate with _a
a base shiftablyattached ,to an apertured sup
fastener, and means `in cooperatingrelation with
port and adapted, to interlock with the stud arm
respect te the fastener engagingsurface vfor re
upon turning movement Vof the latter, of an at
taining a fastener engaged ’by the fastener. engag
ing surface in fastening position, land resilient ‘t taching member comprising a platesecured to
` saidsupport, fthe sides of said plate intermediate
means engaging- the member and the base.- v'
.the .fastening attaching said plate to said sup
7. A device of the >kind described y,corrnprising in
portv being channelled >and presenting opposed
combination a baseadapted to be secured‘toone
of two members to be fastened. together, the base ` A guides forshiftably receiving a portion of said
erating fastener ele-ment, 'a member _shiftably se
havingan opening therethrough, a member se . 5.0. -socket member.
14. Ina rotaryoperative fastener of the type
cured to the base and having limited movement
with respect thereto _in all lateral directions, the
member including a Vfastener engaging surface
comprisingxa rotary stud formed with a radially
about the opening -.through the base _andresilient
abase shiftably `attached to »an apertured rsup
extending .arm and a socket member formed with
members-adjacent the fastener" engaging surface. ív ' port-and adapted to interlock »with the studarm
8. A device of the kind described comprising in
combination a base adapted to be secured to one
of two members to be fastened together, the base
having an opening'thcrethrough, a member se
cured to the base and having limited movement
with respect thereto in all lateral directions, the
member including a fastener engaging surface
about the opening through rthe base and resilient
members adjacent the fastener engaging surface,
and resilient means engaging the member and
the base.
I
9. A device of the kind described comprising
in combination a base adapted to be secured to
one of two members to be fastened together, the
base having an opening for a fastener, and a i
upon turning movement of ' the latter, of i an
attaching member comprising a plate secured to
said' support, and presenting opposed guides
loosely embracing opposed portions of said socket
member permitting lateral shifting of said socket
base on said attaching plate.
15. In a rotary operative fastener of the typecomprising a rotary stud formed with a radially
extending arm and a socket member formed with
a base shiftably attached to an apertured sup
port and adapted to interlock with the stud arm
upon turning movement of the latter, of an at
tachingmember comprising an apertured plate
secured to said support, and presenting opposed
guides loosely embracing opposed portions of said
movement with respect thereto in all lateral direc
socket member permitting lateral shifting of said
socket base over the aperture of said attach
tions. the member including a section arranged
ing plate.
parallel to the base having 'anV` opening there
through substantially alined with the opening
comprising a rotary stud formed with a radially -'
member secured to the base and having limited -
,
16. In a rotary operative fastener of the type
-faii'agsro
7
extending arm and Aa socket member formed with
a base shiftably attached to an apertured sup
port and adapted to interlock with the stud arm
upon turning movement of the latter, of an at
taching member comprising a plate- secured to
said support, and presenting opposed guides
loosely embracing opposed sides of said socket
member.
.
17. A socket fastener member for attachment
to an apertured support comprising a stud-re
8
20. In a rotary operative fastener of the type
comprising a, rotary stud formed with a radially
extending arm and a socket member formed with
aV base shiftably attached to an apertured sup
port and adapted to interlock with the stud arm
upon turning movement of the latter, of an at
taching member comprising an apertured plate
secured to said support, and presenting opposed
guides loosely embracing opposed portions of
said socket member permitting lateral shifting
ceiving socket having an elongated base formed
of said socket base over the aperture of said
with a stud-receiving aperture and a raised stud
attaching plate, said plate being formed with
spaced stop means for engaging sides of said
engaging seat adjacent said aperture, the ter
minal end portions of said base being disposed
base to limit shifting` of the socket member in a
in a plane spaced from the plane of said seat 15 direction at right angles to said guides.
and constituting bearing sections, an attaching
21. A fastener for use in securing together-an
member for connecting said socket member to
apertured support and a part to be attached
said support comprising an elongatediplate sup
thereto which is provided With a rotatably
porting said socket and having its terminal ends
mounted stud, said fastener comprising- a stud
beyond said bearing sections ñXedly attached> to y20 engaging fastener member for cooperative en
said support, said plate providing a supporting
gagementI with the rotatable stud, retainer means
surface for said Vbearing portions and being
adapted to be mounted on the support and sup
formed with an intermediate aperture overlying
porting said stud-engaging fastener member and Y
said support aperture and transversely disposed
means on said retainer overlying a portion of
loop means on said plate overlying said bearing 25 said fastener member whereby lateral shifting
portions, said socket member being bodily shift
of said-stud~engaging fastener member in a plu
able upon said attaching member.
rality of directions relative to the >aperture of
18. In a rotary operative fastener of the type
comprising a rotary stud formed With a radially
said support; may be effected.
y
Y22. A fastener= for use in securing together an
extending arm and a socket member formed with 30 apertured support >and a part to be attached
a base shiftably attached to an apertured sup
thereto ' whichV is provided with a rotatably
port and adapted to interlock with the stud
'mounted stud, said ¿fastener comprising a stud
arm upon turning movement of the latter, of
engaging fastener member provided with spaced
an attaching member comprising a plate se
bearing portions and 'retainer means adapted to
cured to said support, the sides of said plate 35 be mounted on the support and provided with a
intermediate the fastenings attaching said plate
bearing surface for slidably engaging said bear
to said supportV being channelled and presenting
opposed guides for shiftably receiving a portion
ing portions- of said fastener member, said re
»of said socket member, and means for limiting
shifting movement of said socket member in a 40
direction at right angles to said guides;
19. In a rotary operative fastener of the type
tainer being formed with means overlying and
spaced from said bearing portions.
~23. InV a fastener'for Cowling or the like, a
supporting structure adapted to be rigidly at
tached to anapertured support, a fastener ele
comprising a rotary stud formed With a radially
ment comprising a metal strip having a central
extending arm and a socket member formed with
aperture and rigid cam means adjacent the aper
a base shiftably attached to an apertured sup 45 ture adapted to receive and interlock with a co
port and adapted to interlock with the stud‘arrn
operating rotary fastener element upon turning
upon turning movement of the'latter, of an at
taching member comprising a plate secured to
movement o-f the latter,- said strip having bear
said sup-port, the sides'of said plate‘_intermediate
ingrsections beyond said aperture adapted to bear
slidably on theV supporting structure in ya plane ’
the fastenings attaching said plate to said sup 50 spaced from the said cam means, and means on
port being channelled and presenting opposed
said supporting structure overlying said bearing
guides for shiftably receiving a portion of said
sections for loosely attaching said strip to said
socket member, said plate'. being formed with
spaced stop means for engaging sides of said
base to limit shifting of the' socket member in
a direction at right angles to said guides.
supporting structure, said strip being bodily shift
ablenlaterally in `at least twoîdirections later
ally relative toY said supporting structure.
RICHARD W. LUCE.
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