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Патент USA US2407830

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Sept. 17}, 1946.
T. R. GRIFFIN “
LOCK NUT‘
Filed June 5, 71943
nil
2,407,830
2,407,830
Patented‘ Sept. 17, 1946
STAT Es PATENT cert-cs1.
2.407330
no'oK NUT
Theodorei
Griffin; Belmont,1Ma‘ss., tas'sig'nor to‘ .
United- Carr: Fastener Qorporatio'n, Cambridge;
Masssea?corporation- of Massachusetts-‘
Animation-Juries; 1943, sesame: 4892851
3 “Claims. (01. 151-14’)
Tih'el- present '1 invention »~re1ate§ a. to tension nutsi
forfscrefw threaded’fastenings and aims generally?
nearly’ resemble" the? snaps “0f? the‘inlli?‘el'éil T3 as?
shown in Fig. 5.
to simplify and improve existingi riuts'i of? this’?
_
‘
The‘) terminal endsl l5 of the ?ngers; M‘ are
type.
One'iof4the primary?» ob’ie'cts of the invention
?t Iin‘tb and ‘ seat in- the threads 10f‘ the!‘ screw?‘ I33.’
Preferably the free terminal ends l5 of the ?ngers
is the provision of an improved tensional nut
l4 are normally disposed inwardly of the path
formed of sheet metal having a base and an
of the screw (as indicated in dotted lines, Fig. 4)
interiorly threaded barrel drawn therefrom with
so as to be expanded outwardly thereby and
a plurality of locking ?ngers tensionally engag
thus engage in the threads of the screw l3 under
10
ing the threads of a screw passed through the
tension of the resilient ?ngers Hi.
barrel beyond the end thereof to effectively resist
It will be observed from the drawing that as
unintentional rotation of the screw in the nut
the screw I3 is threaded through the nut barrel
in a withdrawing direction.
l0 into engagement with the axially spaced ?n
A further object of the invention is the pro
vision of a tension nut of the type above de 15 gers, the ends l5 of the ?ngers will be expanded
by the nut and will be seated in the threads. As
scribed which may be quickly and economically
the lead of the threads of the screw I3 is towards
manufactured.
the head end thereof the upper portions of the
Illustrative of theinvention, reference is made
bowed ?ngers l4 and the terminal ends I5 thereof
to the accompanying drawing showing preferred
20 will be twisted to a slightly inclined position fol
embodiments of the invention and in which:
lowing the lead of the screw as shown in Fig. 3.
Fig. 1 is a side elevation of one embodiment
The ?ngers I4 thus engage in any section of
of my improved tensional nut shown as applied
to a screw;
Fig. 2 is a plan view thereof;
thread with an inward tension as well. as an
upward thrust. The ends of the ?ngers l4 thus
Fig. 3 is a side elevation as viewed from a side 25 exert a resilient tension on the opposed inclined
faces of the threads of the screw and provide a
at right angles to Fig. 1;
drag to resist rotation of the screw in the nut.
Fig. 4 is a vertical sectional view of the nut;
This tension on the screw is sui?cient to resist
and
accidental rotation of the screw in unthreading
Fig. 5 is a side elevation of an installation em
or withdrawing direction so that an installation
ploying a slightly modi?ed form of tension nut,
parts of the installation being shown in section.
Referring to the drawing, the nut proper com
prises a tubular barrel [0 interiorly threaded as
embodying the tension nut of the present inven
tion is secure against unintentional loosening
after ?nal tightening.
It is not necessary that opposed ?nger ends
ing base 12 preferably disposed in a plane at right 35 I5 lie in the same plane and seat‘ in the same
convolution of the thread of the screw as shown
angles to the barrel. The barrel l0 and base l2
in Fig. 1. They may be disposed in different
are advantageously formed of sheet metal and
planes spaced axially from the end of the barrel
the barrel may be drawn from a blank contain
l0 and engage in different convolutions of the
ing the base by regular drawing operations, asv
40 screw as shown in Fig. 5.
will be readily understood.
at H , and integrally joined to a laterally extend
The nut is provided with screw thread engag
A conventional installation comprises one or
ing and locking means preferably integral with
more apertured pieces of work or parts l8 through
the barrel l0 and adapted to engage the threads
which the screw is passed and threaded into the
of the screw I3 at points spaced from the outer
nut on the side of the Work opposite the head of
end of the barrel. In the illustrated embodiment 45 the screw as shown in Fig. 5. The base l2 may
of the invention this locking means comprises a
simply bear upon the adjacent face of the work
plurality of outwardly bowed resilient ?ngers l4
or be rigidly secured to the work as by rivets
integrally joined to and extending outwardly
[9 as desired.
from the end of the barrel. For purposes of
Advantages of the invention are the simplicity
illustration, I have shown but two of such ?ngers 50 of construction, effectiveness of operation as well
l4 extending from opposite sides of the barrel
as economy in the cost of operation. As will
though it will be apparent that a larger number
be apparent, the barrel may be drawn to a greater
of ?ngers may be employed. The ?ngers 14 may
length than illustrated in the drawing and end
be bowed in such manner as to be substantially
sections removed from opposite sides to leave the
V-shaped as shown in Figs. 1 and 4 or to more 55
2,407,830
4
?ngers I4, which may then be bowed and shaped
metal and having a tubular internally threaded
to provide thread-engaging ends.
screw-receiving barrel and a base disposed at
right angles to said barrel, and locking means
integrally connected as a part of the nut for
engaging the screw beyond said barrel, said lock
Although I have illustrated and described pre
ferred forms of my invention, I do not wish to
be limited thereby because the scope of my in
vention is best de?ned by the following claims.
I claim:
ing means comprising a plurality of bowed
v
resilient ?ngers of relatively greater width than
thickness and having thread-engaging edge por
tions normally disposed withinthe path of the
1. A lock nut‘ for cooperation with a screw
passed through an apertured piece of work, said
nut being formed from a single piece of sheet 10 threads of the screw thereby 'to engage the
metal and having a tubular internally threaded
- threads of the screw under tension to resist turn
screw-receiving barrel and a base disposed at >
ing thereof in withdrawing direction.
right angles to said barrel, and locking means‘ ‘
3. A lock nut for cooperation with a screw
integrally connected with the end of the barrel
passed through an apertured piece of work, said
opposite the head for engaging the screw beyond
nut being formed from a single piece of sheet
said barrel, said locking means comprising'a 15 metal
and having'a tubular internally threaded
plurality of outwardly bowed resilient ?ngers
screw-receiving barrel, a plurality of wings in
having end portions normally disposed within
tegral with said barrel and extending beyond
the path of the threads of the screw and expand
ible thereby to engage the threads of the screw
one end thereof, said wings being bowed out
wardly and having ends inturned and formed
under tension to resist turning thereof in with
drawing direction.
»
with terminal edges adapted to engage under
tension in the threads of the; screw passed
'
2. A lock nut for cooperation with a screw
passed through an apertured piece of work, said
nut being formed from a single piece of sheet
through said :barrel.
25
THEODORE R. GRIFFIN.
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