Improvements in Nut-locks.
Year: 1897

page_text: Improvements in Nut-locks.
I, CLIFFORD CORTLAND CUYLER, of Arago, in the County of Coos and State of
Oregon, United States of America, Inventor, do hereby declare the nature of this
invention and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement:-
My invention relates to improvements in nut-locks, and it pertains to nut-locks
having a specifically formed key adapted to be passed through the nut just at one
side of the thread and when turned to engage the threads on the bolt and thus lock
the nut against being detached until the key is again turned to release the bolt
threads.
The object of my invention is to provide a nut-lock in which the nut is provided
with an opening extending through the nut transverse the threaded opening and
just at one side thereof, the key opening extending partially into the thread-opening,
and to construct the key with a flat portion enabling it to be turned to allow the
passage of the bolt, but when turned to bring the round part of the key against the
thread it will engage the thread, thus wedging it and preventing the removal of
the nut, and to provide it at one end with a fin, projection, or feather which moves
in a slit communicating with the key-opening, whereby the key, when inserted in
the nut, is guided in the proper position to permit the free passage of the bolt
through the threaded opening of the nut, but when turned around will cause the
round portion of the key to engage the thread and also the fin or projection to form
a lock to prevent the removal of the key until it is turned to bring the fin in a line
with the said slit.
In the accompanying drawings,
Fig. 1 is a perspective view of a nut, showing my invention applied thereto.
Fig. 2 is a sectional view of the nut, taken longitudinally of the key.
Fig. 3 is a perspective view of the nut, showing the key turned in a locked
position.
Fig. 4 is a detached perspective view of the key.
Referring now to the drawings, A indicates an ordinary nut provided with the
usual central threaded opening B. The nut may be of any desired form without
departing from or affecting in any manner the spirit of my invention. A key-
pening D is formed through the nut transverse the threaded opening and just at
LD
077

page_text: one side thereof, but passing slightly through the threaded opening, as shown at d.
Also formed in the nut, longitudinal the key-opening at the side thereof opposite
the threaded opening in the nut, is the longitudinal slit b, the function of which
will be presently set forth.
The key G has the central body portion c and at one end a head d¹, which may
be angular, as here shown, or of any other form by means of which the key may be
readily turned after it is inserted in its passage-way or opening in the nut. The
opposite end of the key is provided with a fin or projection e, adapted to engage
the slit in the nut when the key is being placed in position for use.
Intermediate
the ends of the key it is cut away, as shown at f, sufficiently to leave the threaded
opening B of the nut free and uninterrupted by the key when it is in position in
the nut. Attention is called to the fact that this flat or cut-away portion f is at
the opposite side of the body portion of the key from the fin or projection, so that
when the key is placed in the nut and forced endwise through its receiving-opening
the flat or cut-away portion will be adjacent the threaded opening of the nut to
permit the free passage of the bolt therethrough without any interruption or impedi-
ment. Attention is also called to the fact that the cut-away portion is a distance
from the head of the key equal to the distance from the outside of the nut to a
vertical or central line drawn through the nut, so that when the head of the key
is made to engage the side of the nut the flat or cut-away portion is opposite or
adjacent to the threaded opening B of the nut.
From this description it will be seen that in placing the key in position in the
nut the flat portion is brought to the right position to permit the free passage of
the bolt therethrough. The nut having been placed upon the bolt a turn of the
key will cause the round portion to engage the threaded part of the bolt, as will be
readily understood, and thus lock the nut in position thereon.
The fin or projection on the end of the key is a distance from the head of the key.
equal to the width or diameter as the case may be, of the nut, so that after the key. is
placed in position with the head against the side of the nut the turning of the key will
cause its round portion to engage the thread of the bolt and at the same time turn
the fin or projection at the opposite end of the key to one side of the slit, so that
the key is then locked in its passage-way against removal, as will be readily under-
stood, without first turning it to bring the fin or projection in line with the said
slit. When in that position, it may be readily removed, as will be readily under-
stood.
"From the above description it will be seen that I produce a simple nut-lock con-
sisting of a key which, when turned, performs the double function of locking the
nut in position and of locking the key itself in position against removal.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is: :-
1. A nut-lock comprising the nut having the usual threaded opening, a key
passage-way extending through the nut transverse the threaded opening and pass-
ing through one side of the threaded opening and communicating therewith, and a
key adapted to pass through the said key-opening and having at one end a fin, and
intermediate its ends a cut-away portion 'a. distance from the head equal to the
distance from the outside of the nut to a central line drawn through the nut' trans-
verse the key, substantially as and for the purpose described.
2. A nut-lock comprising a nut having the usual threaded opening, a key-opening
extending transverse the threaded opening and communicating therewith, a slit
extending throughout the length of the key opening and at one side of the threaded
opening, and a key having an intermediate cut-away portion for the purpose
described, and a fin or projection at one end adapted to register with the said slit,
substantially as described.
3. A nut-lock comprising a nut having the usual threaded opening, a key-
opening extending transversely the threaded opening and communicating therewith,
i

page_text: a slit extending longitudinal the key opening, a key having an intermediate cut-
away portion, at one end a head and at the opposite end a fin or projection adapted
to engage the slit, the fin being a distance from the head equal to the width of the
nut, whereby the turning of the key will lock the nut in position and also the key
against removal, substantially as described.
Dated this 25th day of March 1897.
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.