Lock-Washer. Page: 3 of 3
[1], 2 p. : ill. ; 23 cm.View a full description of this patent.
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1,342,559
formed an extension 6, which slightly tapers.
Also at the -time of the formation of the
washer, the extension is provided with an
indenture 7 at the point where the extension
5 is designed to be bent at an obtuse angle to
the body of the lock washer, and also. at the
same time the extension is given a partial
bend, as indicated in full lines in the side
elevation, as shown at 8. Also in the side.
'10 elevation of Fig. 2, the extension 6 is shown
completely bent in dotted lines in order to*
engage one face of the nut.
As previously stated, the indenture or
cut-away portion 7 acts to facilitate the com-
15; 'plete bending of the extension 6. Also at the
time of the formation of the washer, the
body thereof is formed with slits 9, which
are spaced and are adjacent the marginal.
edge of the opening 4. By the formation of
20 the slits a tongue 10:is caused to be formed
in the body of the washer. At a certain time
during the formation of the washer .this
tongue 10 extends normally radially from
the center of the opening, but when:the lock
25 washer is completely formed, this tongue is
bent as at 11 so that the tongue may extend
at right angles to, the body of the washer.
It is obvious that when the washer is ap-
Plied to the. shank of the' bolt, and the nut,
30 is screwed home on the shank, the pressure
of the nut in a direction toward the member
to be clamped will cause the tongue (which
is V-shaped and sharpened as shown at'12)
to pierce. into the member to be clamped..
35 The tongue will then prevent accidental ro-
tation of the lock washer.
The partial bend of the extension 6 is such
that one face of the extension will conform
to and en-age in one of the bevels 13 of the
40 nut 2. this- disposition of the extension
will not prevent the nut from freely rotat-
ing on the shank of the bolt, that is, while
the nut is in. the act of screwing home.
However, after the nut reaches home, it is
45 apparent that sufficient pressure may be ap-
plied to the extension 6, causing the same to
bend and its outer face will then conform to
one 'of the flat faces of the nut and since the
tongue 10 is in engagement with the mem-
50 ber to be clamped, the nut as well as the lockwasher are prevented from accidental ro-
tation.
The invention having been set forth, what
'is claimed as new and useful is :-
As a new article of manufacture, a lock 55
washer constructed from a single piece of
sheet metal comprising a body having a
central opening through which a bolt is
adapted to pass, whereby the body may be
interposed between a nut and an element to 60
be clamped, said body at a point adjacent
the marginal edge of the opening being pro-
vided'-with a tongue extending radially of
the opening and approximating the center
thereof, said tongue. having parallel' op- 65
posite edges and terminating in a V-shaped
extremity, the body adjacent to and alined
with 'the opposite parallel. edges of' the
tongue having parallel slits in planes offset
on. each side of the center -of the opening, 70
whereby the tongue.may be bent upon itself
at right angles 'to the body at a. point out-
wardly offset. from the- edge of the opening,
so as to prevent:contact with the surface of
a bolt when engaged through the opening, 75
said body at, points diagonally opposite the
end of the tongue having-enlarged cut away
portions, said body also at a point diamet-
rically. opposite the end of the. tongue hav-
ing an additional broad tongue caused to 80
be formed by said cut a'way portion, one
face. of said broad tongue at. a point ap-
proximating the edge of the opening having.
ia transversely extending groove of a gradual
curved depth in cross section, ,the broad 85
tongue lying normally at an, obtuse angle
to. the body to permit a tool to be inserted
between said tongue and the element, to be
clamped, whereby the broad, tongue may
be given a bend to contact with one of the 90
flat faces of a nut, the normalobtuse angle
of the broad tongue corresponding to the'
corner bevels of a nut, whereby the nut may
be turned to its limit on a bolt.
In testimony whereof I hereunto affix my 95
signature. in the presence of two witnesses.
CLINTON A. MEDBERY.
Witnesses:
Jos. A. Donor,
Z. M. BURGEr.2
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Reference the current page of this Patent.
Medbery, Clinton A. Lock-Washer., patent, June 8, 1920; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1258117/m1/3/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.