Improvements in Nut Locks.
Year: 1892

page_text: Date of Application, 17th May, 1892-Accepted, 18th June, 1892
COMPLETE SPECIFICATION.
Improvements in Nut Locks.
I, EDWARD WASHINGTON TAYLOR, of Salt Lake City, in the territory of
Utah. United States of America, Gentleman, 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:—
This invention relates to a device for locking nuts on bolts, and it has for its
object the provision of means at a minimum expense whereby a nut may be locked
upon a bolt from movement in either a backward or forward direction and may
allow the nut to turn in one direction and lock the same from movement in an
opposite direction only when desired.
A further object of the invention is to adapt the improvements for use on a
right or left hand threaded nut and bolt, and a further object is to provide means
for insuring a proper action of the locking devices and retain the locking key or
keys in their seats so as to prevent them from being casually displaced.
The invention will be fully understood from the following description and claims
when taken in connection with the annexed drawing, in which:
Fig. 1 is a diametrical section of a nut embodying my improvements the same
being illustrated as applied to a part of a bolt.
Fig. 2 is a perspective view of the nut removed, with the locking keys in
position.
Fig. 3 is a plan view of the nut showing the bolt and two of the keys applied.
Fig. 4 is a perspective detail view of the nut illustrating one of the beveled or
cam-faced grooves for the reception of the locking key or pin, and
Fig. 5 is a view of one of the keys or pins removed.
Referring by letter to said drawing:
A indicates a nut which may be of rectangular or other suitable form in outline
and provided with the usual screw-tapped or threaded bore as shown. This nut is
provided at a suitable point within its threaded bore with a beveled or cam-faced
groove a. This groove which extends across the threads in the nut and from one
side to the other thereof, is of such depth at its deepest portion as to permit a key
or locking pin to be placed therein and barely touch the threads of the bolt when
the nut has been turned, but to engage or contact with the threads of said bolt
sufficiently to be carried up the beveled or cam-face of the groove or recess and
bind therein to form a lock between the nut and bolt. It is desirable in order to
more effectively retain the locking key or pin in position to provide the recesses
with a roughened surface or file-like teeth which extend the entire length of the
groove or recesses as better shown in Fig. 4 of the drawing.
B indicates the locking key or pin. This pin which is formed of metal may be
of any suitable shape in cross-section although it is preferable to have it of a
circular form and in order to work more effectively this pin or key may be also
roughened or provided with file-like teeth extending lengthwise as shown."
b, indicates a groove or recess in the threaded bore of the nut which is of a
shape and form the same as the groove a, and arranged in a reverse manner
thereto. This groove b, which is arranged reversely to the groove a, and is
designed to work as a lock in a reverse direction is here illustrated at a point
diametrically opposite to the groove or recess a, although it is obvious that it may
be placed at any suitable point in the threaded bore.
From the construction shown and described it will be seen that in using a right
hand threaded nut and it is desirable to lock said nut from backward movement it
is simply necessary to use a key in the groove a. When it is desirable to use a
left hand threaded nut it is simply necessary to use a key in the groove b, to.

page_text: prevent unturning or backward movement and when it is desirable to use either a
right or left hand threaded nut and prevent the same from turning in either
direction after it has been screwed home, both keys should be used.
The locking key which I have shown is provided with an angular branch or
head at one end and when the key or keys have been placed in position they may
be better held in their seats by upsetting a part of the face of the nut against
the head of the key.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. The combination with a bolt, of a nut provided with two beveled grooves
in its threaded bore on opposite faces thereof, each having its cam-face arranged
reversely to the other, and pins or keys adapted to be inserted in said grooves to
engage said faces and lock the nut from movement on the bolt in either direction,
substantially as specified.
2. The combination with a bolt, of a nut provided with two beveled grooves in
its threaded bore, each having its cam-face arranged reversely to the other, and
pins or keys adapted to be inserted in said grooves to engage said faces and lock
the nut from movement on the bolt in either direction, substantially as specified.
3. The combination with a bolt, of a nut provided in its threaded bore with a
beveled or cam-faced groove, and the cam-face provided with file-like teeth
running lengthwise thereof and a key or pin arranged in said groove and adapted
to lock the nut on the bolt, substantially as specified.
4. The combination with a bolt, of a nut having a beveled or cam-faced groove
in the threaded bore thereof, said groove having file-like teeth in its face and a key
or pin having its surface provided with file-like teeth running lengthwise thereof
and adapted to engage the cam-face of the groove and also the threads of the bolt
to lock the nut thereon, substantially as specified.
Dated this 17th day of May 1892.
W. P. THOMPSON & BOULT,
Agents for the Applicant.