Nut-Lock. Page: 2 of 2
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U\TITED STATES PATENT OFFICE.
GEORGE F. CAPRON, OF EL PASO, TEXAS.
NUT-LOCK.1,256,436.
Specification of Letters Patent.
Patented Feb. 12, 1918.
Application filed January 9, 1917. Serial No. 141,418.
To all whom it may concern:
Be it known that I, GEORGE F. CAPRON,
a citizen of the United States, and resident
of El Paso, in the county of El Paso and
5 State of Texas, have invented certain new
and useful Improvements in Nut-Locks, of
which the following is a specification.
The present invention relates to nut locks.
It is the object of this invention to pro-
i0 vide a device, by means of which a nut can
be effectively locked on a threaded bolt or
stud against accidental movement and which
is adapted to be detached without damaging
the nut or bolt, and which will permit of
15 a nut being removed and replaced whenever
desired without destroying the thread.
Other improvements and novel details in
the construction and arrangement of the
various parts of the nut lock will be brought
20 out more in detail in the description to fol-
low, which, for a clear understanding of the
invention, is to be considered in connection
with the accompanying drawings, forming
a part hereof, and wherein is disclosed for
25 the purpose of illustration, convenient and
satisfactory embodiments of the invention.
It is to be noted, in this connection, that
the minor changes in the construction and
arrangement of the parts may be made with-
30 out departing from the spirit of the inven-
tion and the principle of operation of the
various parts.
In the drawings:
Figure 1 is a side elevation of my inven-
35 tion. part thereof being in section;
Fig. 2 is an end elevation of the same, and
Fig. 3 is a perspective view of a T-shaped
locking pawl.
Referring more particularly to the draw-
40 inus wherein similar characters of reference
designate like and corresponding parts
throughout the various views in which the
bolt 1 is provided with the common form
of threaded end 2. The lock nut of my in-
45 vention is provided with a substantially T-
shaped recess having its stein or radially ex-
tending portion thereof substantially wedge-
shape. The side 3 of the said wedge-shaped
recess being at an angle, and the opposite
50 side 4 extending radially from the centerthereof. The larger surface of the wedge-
shaped recess being adjacent the periphery
of the opening in the center of the nut for
accommodating the bolt 1.
The T-shaped locking pawl of my inven- 55
tion comprises a body portion 5 having a
laterally extending wedge-shaped member
6 intermediate the ends thereof.
In use the pawl is inserted in the T-
shaped recess and retained therein by bend- 60
ing the edges 7 of the nut adjacent the ends
of the groove into the cut-out portion by
means of a hammer. The spring stein 6 will
be flexed to the sides 3 of the groove when
the nut is being placed on the bolt to permit 65
the rotation of the same. It is obvious that
the nut cannot be displaced unless the pawl
is first removed, as upon a tendency of the
nut to unscrew the spring stein 6 will bite
into the thread and lock the nut on the bolt. 70
To remove the nut from the bolt all that is
necessary is a chisel and a hammer first re-
moving the portion 7 and then sliding the
pawl out of the opening.
From the above description taken in con- 75
nection with the accompanying drawings,
it can be easily seen that I have provided a
nut lock that is simple in construction, that
can be cheaply manufactured and when as-
sembled can be placed upon the market and 80
sold at a minimum cost.
Having thus fully described my inven-
tion, what I claim as new and desire to se-
cure by Letters Patent is:
In combination with a nut having a sub- 85
stantially T-shaped recess formed therein, a
portion of which terminates at a point ad-
jacent the bolt receiving opening therein, a;
T-shaped pawl receivable in said recess and
held therein against displacement by bend- 90
ing portions of the nut over the ends there-
of, the lateral portion of said pawl being
rigid and the longitudinal portion thereof
being flexible and projecting into the bolt
receiving opening, as and for the purpose 95
set forth.
In testimony whereof, I affix my signa-
ture hereto.
GEORGE F. CAPRON.Copies of this patent may be obtained for five cents each. by addressing the "Commissioner of Patents,
Washington, D. C."
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Capron, George F. Nut-Lock., patent, February 12, 1918; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1257464/m1/2/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.