Nut-Lock
Year: 1897

page_text: Date of Application, 14th Dec., 1897-Accepted, 15th Jan., 1898
I, WILLIAM EDWARD WALDRON, of the Borough of Washington, County of
Washington, State of Pennsylvania, United States of America, Student, do hereby
declare the nature of my invention for new and improved "Nut-Lock," and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
This invention relates to certain new and useful improvements in nut-locks,
the object being to furnish a locking-nut which is applicable to bolts of ordinary.
construction, and when applied thereto will prevent the nut unscrewing from the
bolt, the locking, member of the nut impinging against the base and sides of the
threads, so that the engagement between the hocking-bolt and thread will not
injure the threads.
My invention also consists in the improved means for throwing or holding the
locking-bolt out of engagement with the thread of the bolt when it is desired to
remove the nut.
In the drawings, Figure 1 is a sectional view of the nut, showing it applied
to a bolt; and Fig. 2 is an end view, partly in section.
A refers to the bolt, which is of ordinary construction. The lock-nut B is pro-
vided with an aperture b, which is formed by boring a hole through one side of
the nut, so that it will intersect the threads thereof. This hole or aperture does not
extend quite through the nut, being closed at one end, while the other end, which
is open, is provided with threads, and the aperture may have longitudinal
recesses with which the edges of the locking dog will engage to hold the same in
proper alignment with respect to the threads of the bolt A. In the aperture
or hole 6 of the nut is first placed a coiled spring c. Then a locking dog or bolt
is placed in the aperture so as to rest upon the spring. The aperture is then
closed by a screw e, said screw having an extension or pin e¹, formed integral there-
with, which is of less diameter than the threaded portion of the screw.
The locking dog or bolt-d is provided with two straight sides of the same pitch
or angle as the thread of the bolt, and the same may be triangular in cross-section
as a preferred form. The other side may be straight, as shown in Fig. 1, to
present a locking dog or bolt which is triangular in cross-section, or it may be
round, the essential features being that the locking dog or bolt presents two sides
which converge to a point, which will impinge against the threads of the bolt.
This locking bolt or dog tapers longitudinally, the larger end bearing upon the
spring, while the smaller end lies adjacent to the end e¹ of the screw. The lock-
ing dog or bolt is preferably serrated, so that it will better grip or bite the thread
of the bolt.
A
In operation the nut can be screwed on the bolt in the usual way, and when
being screwed on the thread of the bolt engaging with the locking dog or bolt of
the nut will force the same against the spring and allow the nut to be turned.
movement of the nut in a reverse direction immediately moves the locking dog or
bolt in an opposite direction, so as to cause it to bite or engage with the sides and

page_text: base of the threads of the bolt, so as to hold the parts securely in engagement with
each other. When it is desired to remove the nut, the screw e is turned sufficiently
to move the locking-dog out of engagement with the thread of the bolt. The
screw can then be taken off in the usual manner. The screw also serves to close
the aperture.
Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed, I declare that what I
claim is
1. In a nut-lock a nut provided with an aperture closed at one end and threaded
at the other a longitudinally-tapered locking-dog positioned in the aperture and
a spring also located in the aperture to effect a movement of the locking-dog
toward the open end of the aperture; together with a screw for moving the lock-
ing-dog toward the spring, substantially as shown.
2. In a nut-lock the combination with a bolt, of a nut provided with a recess a
locking-dog or bolt which is tapered longitudinally and provided with angular sides
which are adapted to engage with the thread of the bolt, a spring for effecting a
movement of the locking-dog in one direction and a closure for the aperture, as
a screw for moving the locking-dog in an opposite direction, from which it is
moved by the spring.
3. In a nut-lock a nut provided with an aperture closed at one end and
threaded at the other, a spring c located at one end of the aperture, a screw having
a reduced end e¹ and a locking dog or bolt positioned in the aperture between the
spring and screw, said locking-dog being tapered longitudinally and provided with
converging sides with roughened 'faces, said sides being of the same angle as the
angle of the threads of the bolt, substantially as shown and for the purpose set
forth.
1007
MARKS & CLERK,
18 Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.