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Патент USA US2266555

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Dec. 16, 1941‘.
E. JORDAN ETAL
LOCK WASHER AND METHOD FOR MAKINQ SAME
2,266,555
2,266,555
Patented Dec. 16, 1941
‘UNITED’ STATES‘: ‘PATENT ‘OFFICE
2,266,555
LOCK WASHER- AND METHOD FOR
-
MAKING SAME
Hamburg, Germany, and Wilhelm
Ernst Jordan,deceased,
late of Leipzig, Germany,
Steinhorst,
by Margarethe Steinhorst, executrix, Leipzig,
Germany, assignors, by direct and mesne as
Mayr, New York, N. Y.
’ signments, to Karl A.
Application April 28, ‘1939, Serial No. 270,568
'
In Germany April 29, I938
8 Claims.
particularly to lock washers having'a plurality of
radially inwardly or outwardly extending teeth
'
.
'
Lock washers of the‘ typeset forth above have
been proposed before. The flaps-were made to
partly overlap one another.
,
(Cl. 10-86)
The present application relates to a new look
washer and a method for producing same, more
or ?aps.
’
This was accom
smallertype of washers can be made at the same
time.- The present process is therefore ex
traordinarily economical.
' ‘
Further and other objects and advantages
of’ the present invention will be apparent from
the'accompanying speci?cation and claims and
shown in the drawing which, by way of illustra
tion, show what we‘ now consider to be a preferred
embodiment of our invention.
plished by ‘either applying a squeezing pressure
In the drawing:
to the middle portion of the ?aps and thereby 10 ‘Figure
1 is a top view of a strip of metal from
broadening the flaps or by reducing the original
which the lock washers are produced showing the
diameter of the washers by a suitable contracting
individual phases of the manufacturing process
operation. With the former process the extent
according to the present invention.
of overlapping is usually very small and a great
Figure 2 is a top view of a strip of metal from
15
pressure must be applied for obtaining the de
which the lock washers are produced showing the
sired squeezing or stamping effect. The latter
individual phases of a modi?ed manufacturing
method makes it necessary to completely stamp
process according to the present invention.
out every individual ring or washer before pro
vFigure 3 is a top view of a ?nished lock washer
ducing the flaps; this makes the manufacturing
process complicated and expensive and is a great’ 20 according to the present invention. '
disadvantage.
According to the present invention lock wash-‘
ers of the type set forth are continuously pro
Figure 4 is a large scale inside ‘view of a sec
tion of a lock washer according to'the' present
invention.-
>
'
~
’
Like parts are designated by like numerals
in
all ?gures of the drawing.
25
overlapping is obtained with comparatively little
The ?rst step, I,‘ of producing a lock washer
pressure. The swaging pressure is applied not
according to the present invention is to punch out
to the center of the flaps but to lateral portions
the holes I of the lock washers to be produced
of the ?aps whereby excess pressure from above
from
to make
a strip
the of
cutsmetal
3 which
2. The
extend
nextsubstantially
step, II,
is applied near one lateral end of a flap and ex
cess pressure from below near the other lateral 30 radially from the opening I so that ?aps 4 are
end of said ?ap. The flaps are therefore‘not so
produced. ~ The next step, III, consists of apply
much squeezed but are bent or twisted. Where
ing pressure on top of one lateral portion 5 of
as with the known stamping or squeezing process
the flaps 4 in the direction of arrow 5' in'Figure 4,
the flaps are weakened, with the process accord
and from underneath to the other lateral por
ing to the present invention the stability of the 35 tion
6 of the flaps in the direction of arrow 6’.
individual flaps is increased. No matter whether
The
?aps
are thereby bent and, if desired, by ap
the teeth of the lock washers, according to the
plying greater pressure swaged so that the flap
present invention, extend radially outward or
material is laterally permanently expanded and,
inward from a solid ring, the washers are pro
depending on the swaging pressure, a desired
40
duced in a continuous process from a continu
extent of overlapping is obtained. The pressure
ous strip of metal.
needed for making the material flow laterally
It is advantageous to leave a." spot connection
and overlap the adjacent ?ap is, with the method
between the washer and the material from which
according to the present invention, lower than
it is made until the ?nished washer-is ?nally
with the known methods'whereby pressure is ap
pushed out of ' said material. ’ Stamping and 45
plied to the center of the ?aps. The application
pushing out cannot be done in one process ‘step
of swaging pressure exerted near the sides of the
because the stamping is done between a stamp
?aps makes the material flow and expand much
and a matrix. In- case the flaps project towards
easier than the application of pressure at or close
the center of the washer, connection of two points
to the center of the ?aps. The swaging oper
50
of the circumference of the washer ring'with the
ation may be applied to only one lateral portion
material from which it is made is su?icient in
of the flaps or to both side portions. - During the
most cases. In case of washers with outwardly
next following process step, IV, the lock Washer
projecting teeth or flaps, a point of the outer rim
is almost completely punched out of material 2;
of two flaps is left connected with the raw mate
' this step is carried out by means of a stamp and
rial. More points may be left connected in case
a matrix and, after this step, the ?nished washer
of larger washers.
.
is
connected and held to the raw material at two
Because of the continuous production process
duced from a strip of material and su?icient
a plurality of washers can be made simultane
ously from the same strip of material in one and
the same process step. Twenty and more of the
points 1 only. The ?nal step V consists of push
ing the finished washer out of material 2 and
thereby severing the connections ‘I.
2
2,266,555
The shape of the; individual ?aps is apparent
from Figure 4.
In Figure 1 a part of a strip of metal is shown
on which the simultaneous operations for simul
taneously producing a plurality of lock washers
into the sheet metal, of making cuts in said sheet
metal which cuts are radially positioned with re
spect to said opening, of applying a swaging pres
‘ sure in opposite direction to the portions of the
‘metal adjacent to said cuts to effect overlapping
of the adjacent portions of the metal adjacent to
said cuts, and of simultaneously pressing the
washer partly out of said sheet metal and leav
always like operations take place simultaneously
ing it thereby connected, at a plurality of spots
in a row extending in the direction of movement 1.0 on its outer circumference, with said sheet metal,
of the material 2.
and ?nally pushing the ?nished washer out of
take place in rows extending across the strip of
material 2.
Figure 2 shows a strip of material in which
The pattern of Figure 2 may be combined with
that in Figure 1 and a great number of lock
washers may be produced simultaneously.
said sheet metal thereby severing the connecting
spots left at the preceding step.
.5. The method of simultaneously making lock
In Figure 2 the production of lock washers is 15 washers from a continuous strip of sheet metal
illustrated having teeth or ?aps which project
in continuous operation, said method compris
outwardly in contradistinction to washers having
ing the steps of punching the openings of said
teeth or ?aps which extend towards the center as
washers into the sheet metal, of making cuts in
illustrated in Figures 1, 3 and 4. In case of lock
said sheet metal which cuts are substantially ra
washers as per Figure 2 the bending and swaging 20 dially positioned with respect to said opening, of
operation III includes severing of the washer
applying pressure in opposite direction to di?er
from the work material 2 except for a plurality
ent parts of the metal adjacent to said cuts to
of spots 1 at which the washer is temporarily held
effect warping of the metal portion between ‘said
to the material; at the next step IV the washer
cuts. and of expanding the metal adjacent said
is ?nally severed and pushed out of material 2.
25 cuts and in a direction transverse to said cuts to
While we believe the above described embodi
effect overlapping of the portions of the metal
ments of our invention to be preferred embodi
adjacent to said cuts.
ments, we wish it to be understood that we do
6. The method of making lock washers from
not desire to be limited to the exact details of
a continuous strip of sheet metal in continuous
design and construction shown and described, for 30 operation, said method comprising the steps of
obvious modi?cations will occur to a person
punching the openings of said washers into the
skilled in the art.
sheet metal, of making cuts in said sheet metal
We claim:
which cuts are substantially radially positioned
1. A look washer comprising a solid ring por
with respect to said opening, of applying pres
tion and a plurality of flap members substantially 35: sure in opposite direction to parts of the metal
radially extending therefrom, said ?ap members
adjacent to said cuts to effect warping of the
being twisted and having lateral portions of re- '
metal portion between said cuts, of pressing the
duced thickness overlapping one another, anda
central portion of substantially unreduced thick
washer with its warped portions partly Out Of
said sheet metal and leaving it thereby connect
ed, at a plurality of spots on its outer circum
ference,‘ with said sheet metal, and then punching
the ?nished washer out of said sheet metal there
by severing the connecting spots left at the pre
ness.
2. The method of making lock washers from
a continuous piece of sheet metal, comprising the
steps of punching the openings of said washers
ceding step.
into the sheet metal, of making cuts in said sheet
metal which cuts are substantially radially posi 45; 7. The method of making lock washers from
tioned with respect to said opening, of applying
a continuous strip of sheet metal in continuous
a swaging pressure in opposite direction to dif
operation, said method comprising the steps of
ferent portions of the metal adjacent to said cuts
punching the openings of said washers into the
to effect turning of the metal between the cuts,
sheet metal, of making cuts in said sheet metal
and of thinning out the metal adjacent to the 50: substantially radially positioned with respect to
cuts to effect overlapping of the adjacent por
said opening to produce prong portions between
tions of the metal adjacent to said cuts.
said cuts, and of applying pressure in opposite
3. The method of making lock washers, from
direction individually to the lateral portions of
a continuous piece of sheet metal comprising the
the prong portions between the center thereof
steps of punching the openings of said washers
and said cuts to effect warping of the metal por
into the sheet metal, of making cuts in said sheet
tions between said cuts.
metal which cuts are substantially radially posi
8. The method of simultaneously making a
tioned with respect to said opening, of applying a
plurality
of lock washers from a continuous strip
swaging pressure in opposite direction to the por
tions of the metal adjacent to said cuts to effect 6.0. of sheet metal in continuous operation, said
method comprising the steps of punching the
overlapping of the adjacent portions of the metal
openings
of said washers into the sheet metal,
adjacent to said cuts, of pressing the washer
partly out of said sheet metal and leaving it
thereby connected, at a plurality of spots on its
outer circumference, with said sheet metal, and
finally pushing the ?nished washer out of said
sheet metal thereby severing the connecting spots
left at the preceding step.
4. The method of making lock washers, from
a continuous piece of sheet metal comprising the
steps of punching the openings of said washers
of making cuts in said sheet metal substantially
radially positioned with respect to said opening,
, and of individually applying pressure in opposite
direction to di?‘erent individual and separate por
tions of the metal adjacent to said cuts to effect
warping of the metal portions between said cuts.
ERNST JORDAN.
MARGARETHE STEINHORS'I‘,
Executrizc of the Estate of Wilhelm Steinh-orst,
Deceased.
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