Nut and Bolt Lock Page: 3 of 4
[1], 3 p. : ill. ; 23 cm.View a full description of this patent.
Extracted Text
The following text was automatically extracted from the image on this page using optical character recognition software:
1,097,205
the head extends beyond the side faces of
the key and as the shoulder 26 is the limit
of the inward movement of the key there
will be a space between the cross part 28 and
5 the face 27 of the nut into which a claw bar
or other suitable tool may be inserted to
withdraw the key from the locking posi-
tion. At its lower edge 23 and near the end
25 the key 22 has a hollowed out or cut away
10 portion 29 which is for the purpose of
weakening the key slightly at the section a.
The recess 29 is of greatest depth adja-
cent its end farthest removed from the end
face 25, thus making the end of the key
15 weakest at the section a. The recess 29 is so
placed and shaped as to control the point
at the weakened section of key where bend-
ing or buckling commences and from which
it progresses in order to insure and maintain
20 complete contact of that portion of the key
adjacent to rounded shoulder 21 with said
shoulder. This action is further assured by
the tendency of end or face 25 of the key
22 to maintain its original position at right
25 angles to the edge 23 by reason of being
partly embedded in the thread 30 which
crosses keyway 12 in the bolt and being as-
sisted further by the flat portion of the edge
23 between the cutaway portion 29 and the
-30 end of key 25. The key 22 is of tough bend-
able metal and when driven into the regis-
tering keyways it assumes the shape shown
in Fig. 1. The flat end 25 of the key has a
tendency to remain at right angles to the
35 flat edge 23, being wedged by the action of
the deflecting thread 30 which extends
across the keyway, until rounded shoulder
21 arrests bending of key at that point
after which further progression of the key
40 into the keyway forces same to follow the
lines of cavity 20. The above described ac-
tion tucks or curls the end 31 of the key
backwardly and causes the inner upper edge
24 of the key to completely fill the cavity
45 and on further upsetting the said end will
raise the nut and take up all the slack be-
tween the threads, holding the bolt in close
contact with the nut at the opposite side to
where the key is in use. It will thus be seen
5o that when the key is inserted into the key-
way it is locked therein and bent upon itself
to produce a thickened portion at the end of
the key to wedge the parts together. The
distance between the shoulder 26 and end
55 face 25 is slightly greater than the distance
between the first thread 30 which it en-
counters and the end face 27 of the nut, the
additional length being sufficient to cause
the intermediate section a to buckle and
60 completely fill the cavity 20 by the time the
shoulder 26 engages the end face 27 of the
nut.
When the key is driven into the alined
seats the end face 25 first engages the thread
65 30 on the nut which extends across the key-way and-due to the driving of the key there-
against the key as well as the nut will each
receive a slight dent, and the part of the
thread in the keyway will be bent slightly
out of line with the rest of the thread and 7G
as -a result the thread will afford an addi-
tional locking action, its position being so
shown in Fig. 1. On continuing the driv-
ing of the key into the seat the same will
bend at the weakened section a into the 75
cavity 20, the edge 31 engaging the bottom
of the seat 12 and the shoulder 26 engaging
the end face 27 when the key is completely
driven in, the shoulder 26 thereby providing
a positive stopping point, so that the key S0
cannot be ruptured by being driven in too
far and to an extent where withdrawal as a
whole and in its entirety would be uncer-
tain or impossible. The key when driven
in and upset into the position shown in Fig. 85
1 jams the nut and bolt threads together,
acting in this respect in somewhat the same
manner as a wedge by reason of forcing edge
31 of the key into close contact with the
bottom of the groove in the bolt, thus also so
preventing endwise movement of the key
as the engagement of the point 31 at one side
and the cavity 20 and rounded shoulder 21
at the opposite side coSperate to hold the
key against movement. The edge of the 90
key which has been weakened is shaped dif-
ferently from the shape of the edge which
fits in the bottom of the seat in the nut and
as a result it will not be possible to insert
the key into the keyway in the wrong way, 100
or in any but the proper way, thus insuring
contact of the key head with the face of
the nut regardless of the position of the nut
on the bolt, also insuring the proper posi-
tioning of hollowed out section 29 in rela- 105
tion and presentation to cavity 20.
The locking of the nut to the bolt may be
made permanent and the removal of the
key may be rendered impossible by simply
cutting off the head of the key. However, 110
if it is desired to remove the key from the
locking position to tighten up the nut or bolt,
a claw hammer or other suitable tool may
be applied to the head and the key may
then be extracted. The end of the key is of 115
suitable metal to withstand bending a num-
ber of times. When the key is drawn out,
the rounded shoulder 21 which engages the
part of the key which has entered the cavity
will straighten out the bent part of the key 120
and the latter will assume substantially the
same shape that it had when driven into the
keyway. When the key has been removed
it is only necessary to give the nut a sixth
of a turn to arrive at another locking posi- 125
tion, whereupon the same key may be driven
in and will assume its locking position in
the cavity as before.
It will be seen that I have provided an
inexpensive locking means and one which is 130
Upcoming Pages
Here’s what’s next.
Search Inside
This patent can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Patent.
Ames, Ernest R. Nut and Bolt Lock, patent, May 19, 1914; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth858361/m1/3/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.