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m0201946.,
~ ' ‘A_QLUSHER
`2,410,090>
SELF-LOCKING NUT
.
1
Filed June 29, 1944
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2,410,090
Patented Get. 29, 1946
UNiTED» s'r'res Parent orifice
2,410,090
SELF-Looms NU'r
Albert. C. Lusher, deceased, late of Waterbury,
Conn., by the Citizens and Manufacturers Na
tional Bank of Waterbury, administrator,
Waterbury, Conn.
Application .I une 29, 1944, Serial No. 542,685
8 Claims. (Cl. 151-21)
1
This invention relates to self-locking nuts.
An object of this invention is an all-metal self
locking nut of simple structure, of low manufac
turing cost and of highly eiiicient locking effect.
Gne embodiment of this nut comprises a cup-V n
shaped metal» shell of polygonal cross-section
having aA central bottom aperture. In the shell
is arranged an apertured threaded nut member
of the same external. configuration as the in
terior configuration of the'shellto prevent rota
2
with tapering tabs or projections I'I which are
bendable over the inset I4 to retain the inset and
nut member I2 in the shell.
The nut member bore and the tubular member
bore are identically threaded but the arrange
ment is such that the thread of the tubular mem
ber Itis slightly out of phase with the thread of
Thus,
the
threading of av
the nut member I2.
`
y
bolt through the nut member I2 and the tubular
10
tion of the nut member relative> to the shell. Asheet metal inset of polygonal configuration is
arranged in the shell and is held against rotation
by engagement with the interior polygonal sur
face of the shell. The shell has bendable means
portion I6 produces suiiioient friction on the bolt
threads securely to lock the nut thereto.
In the modification illustrated in Figs.- 3 and
d, the shell I0 andthe nut member I2 are identical
with the corresponding members of the ñrst em
bodiment and the shell I0 is provided with a
central bottom aperture Il. Also, the nut mem
for locking the inset and nut member in the
shell. The inset has a central tubular shaped
ber is provided with a threaded-bore I3. A sheet
metal inset Illa has a polygonal periphery cor
portion in axial alinement with the nut member
responding to the interior configuration of the
aperture and the nut member and tubular mem
I0 and restsv on the exposed face of the nut
ber are provided with identical but slightly out 20 shell
member I2--. The inset Ma is slightly conical so
of-phase interior threads. Upon threading of a
that there is clearance between the inset> and
bolt through the nut member and into the thread
nut member except at the edges thereof. A tubu
ed tubular portion ofthe inset, fríctional engage
lar interiorly threaded portion Ita projects from
ment is established between the Cso-operating
threads of such a nature as to'lock the nut se
25 the inset Illa.
curely to the bolt.
Other objects, novel features and advantages
of this invention will become apparent from the
following> specification- and accompanying draw
ing, wherein:
.
washer I8 has a beaded portion I9 conforming to
the interior ofthe shell I0 and'tabs I'I projecting
30 from the upper edge of the shell III-are bent over
the bead portion I9 to locky the washer» inset and
nut member in the shell. Preferably, the central
portion _of the Washer isradially slit at several
- Fig. l is a plan View of a self-locking nut em
bodying the invention;
Fig. 2 is a section on the' line 2-2 of'Fig. l;
Fig. 3 is a plan View of amodiñed form of self
locking nut embodying the invention, and
Fig. 4 is a section on the line 4-4 of Fig. 3:
A spring washer I3 rests on the
inset YIlla and has a central aperture through
which the tubular portion Ilia extends. The
places 20.»
35
n
The threads> in the nut member I2" and‘in the
~ tubular portion Via- are'identical but are slightly
out of phase. Thus, the threading of the bolt
A cup-shaped metal shell I0 of polygonal cross
through the nut member bore and through the
section is provided with a central bottom aperture
tubular portion produces suñicient friction on
II. In the shell I0 is arranged a standard type
the bolt to lock the nut securely thereto. The
nut I2 of polygonal configuration having its ex 40 provision
of the radial slits 20 allows the washer
terior walls engaging the inner walls of the shell
I8 to yield somewhat when the nut is assembled
I0 to prevent rotation of the nut member rela
on the bolt. When the bolt binds with the out
tive to the shell. A central threaded aperture
`of-phase thread of the tubular portion Ißa, the
I3 extends through the nut member in alinement
45 'washer will yield slightly to facilitate the intro
with the shell bottom aperture I I.
duction of the bolt.
In the shell Il! above the nut member I2 is
In each modification, the out-of-phase rela
arranged a sheet metal inset I4 having a flange
tion between the threads of the nut member and
I5, the exterior configuration of which conforms
the tubular portion of the inset is such that the
to the interior configuration of the shell I0 to
screwing in of a bolt passing through the nut
prevent rotation of the inset relative to the shell. 50
member into the tubular portion tends to move
The rim of the flange I5 engages the surface of
the tubular portion away from the nut member.
the nut member I2. The inset I4 is provided
The out-of-phase relation is obtained by simul
with a central tubular portion I6 extending to
taneously tapping the nut member and tubular
ward the nut member I2 in axial alinement with
portion after completion of the assembly thereof
55
the nut member bore I3. The shell I0 is provided
2,410,090
3
with the shell Il) and then moving the tubular
portion toward the nut member by a distance
less than one-half the thread pitch. In the first
modification, such movement is permitted by the
4
a sheet metal insert having a central barrel por
tion with an interior thread alined with the nut
blank thread and a ñanged portion of a resil
ient character having a peripheral edge of a
clearance between the inner end of the tubular '
shape complemental to the interior of said cupped
portion I6 and the nut member l2 While in the
second modiñcation such movement is permitted
shell and resting on the adjacent face of said
by reason of the conical shape of the inset.
What is claimed is:
_
l. A device of the character described com
prising a permanently assembled entity con
sisting of a metal cup-shaped shell of polygonal
cross-section having a central aperture in its
bottom, an apertured threaded nut member in
nut blank, the threaded barrel portion being re
moved from said nut blank and having its thread
out-of-phase relative to the thread of said nut
blank, the upper open end of said cupped shell
being inturned to hold the parts together as a
unitary structure.
'7. A self-locking nut unit comprising a sheet
metal cupped shell of polygonal shape having
said shell and having plane end surfaces one o1" 15 an apertured base end and an open end terminat
Which engages the cup bottom, and a sheet metal
ing in a series of lugs, a standard tapped nut
inset of polygonal conñguration having a right
blank seated in the base of said cupped shell
angle flange the rim of which engages the re
and of a size and shape complemental to the in
maining end surface of. said nut member with
terior of said cupped shell, and a sheet metal in
the remainder of said inset spaced from said
sert having a central barrel portion with an in
remaining end surface, said inset having a cen
terior thread alined with the nut blank thread
tral tubular threaded portion with its threads
and a nanged portion of a resilient character
out of phase With the threads of said nut mem
having a peripheral edge oi a shape comple
ber and said shell having bendable means for
mental to the interior of said cupped shell and
engagement with said inset to lock the inset and
resting on the adjacent face of said nut blank,
nut member in said cup.
'
the threaded barrel portion being removed from
said nut blank and having its thread out-of-phase
by said tubular portion extending from said inset
relative to the threads of said nut blank, the
toward said nut member.
'
lugs of said cupped shell being turned over
3. A device of the character described corn 30 against said insert flange for locking the same
prising a metal cupeshaped shell of polygonal
lin said nut unit.
cross-section, an apertured threaded nut member
8. A self-locking nut unit comprising a sheet
in said shell engaging the cup bottom, a central ‘
metal cupped shell of polygonal shape having an
aperture in the cup bottom in alinernent with
apertured base end and an open end, a standard
said nut aperture, a metal inset of polygonal con
tapped nut blank seated in the base of said cupped
figuration arranged in said shell and having a
shell and of a size and shape complemental to
central threaded portion With the threads there
the interior of said cupped shell, and a sheet
of out of phase with the threads of said nut
metal insert having a resilient ñange comprising'
member, a metal washer having an aperture re
the outer face of the nut unit, said ñange having
ceiving said tubular portion and having a beaded 40 a depending edge wall of a shape complemental
periphery conforming in configuration to the
to the interior of the cupped shell with its edge
interior of the metal shell, said shell having bend
resting upon said nut blank and the center por
able means engageable with the bead to retain
tion of said insert flange formed into a barrel
said Washer and said nut member in said shell.
directed toward said nut blank and having a
4. A device according to claim 3 in which said
tapped interior alined With the thread of said nut
Washer is provided with a plurality of radially
blank and out-of-phase relative thereto, the
arranged slits.
upper end of said cupped shell being bent over in
5. A device according to claim 3 in which
intimate contact with said flange to hold the nut
said washer is provided with individual resilient
blank, cupped shell and insert together as a unit.
lingers engaging the base of the inset.
' 6. A self-locking nut unit comprising a sheet
THE CITIZENS AND MANUFACTURERS
metal cupped shell of polygonal shape having an
NATIONAL BANK OF T«VA'I‘l-illìEllRY,
apertured base end and an open end, a standard
By THOMAS F. MOORE,
tapped nut blank seated in the base of said
Trust Oûîcer,
cupped shell and of a size and shape comple
Administrator of the Estate of Albert C. Lasher,
mental to the interior of said cupped shell, and
Deceased.
2. A device according to claim 1 characterized
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