Year: 1897

page_text: Date of Application, 23rd Apr.. 1897-Accepted, 19th June, 1897
improv
31544
I, OLIVER ISAAC DAVIS, residing at No. 236 Main Street Westville, in the County
of New Haven, and State of Connecticut, United States of America Machinist,
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 nut locks, and the object thereof, is to provide an
improved device of this class which is simple in construction and operation, and
which is adapted to be used wherever nut locks are required; a further object
being to provide an improved nut lock, the use of which does not necessitate any
change in the formation or construction of the rod, shaft or spindle, in connection
with which the nut and nut lock are employed.
The invention is fully disclosed in the following specification, of which the
accompanying drawing forms a part, in which :-
Fig. 1, is a side view of an ordinary screw threaded bolt provided with my
improved nut lock, the nut being shown in section;
Fig. 2, a transverse section on the line 2, 2, of Fig. 1 ;
Fig. 3, a view similar to Fig. 1, showing a slight modification;
Fig. 4, a similar view, showing my improvement applied to a wagon, or carriage
nut; and,
Fig. 5, a section on the line 5, 5, of Fig. 4.
In the drawing forming part of this specification, the separate parts of my
improvement are designated by the same numerals of reference in each of the
views, and in the practice of my invention, reference being made to Figs. 1, 2,.
and 3, I provide a shaft, bolt, or rod 5, which is provided with a screw thread 6,
which is of the usual or any preferred form, and mounted thereon, is a nut 7, which
is also of the usual form with the following exception.
Formed in one side of the screw threaded b.re of the nut 7, is a transverse
groove 8, the outer wall of which is inclined in a direction opposite to that in which
the nut is turned in order to remove it as shown at 9, in Fig. 2, and placed in the
groove 8, is a metal cylindrical key plug 10.
When the nut 7, is provided with the groove 8, as shown and described, and the
cylindrical key plug 10, the said nut may be screwed onto the shaft, rod or bolt 5,
in the usual manner, or said key plug may be placed in the groove 8, after the nut
is screwed into position, and when said key plug is in place it will be impossible to
remove the nut as the wedge-shaped form of the groove 8, will press the key plug
into the threads 6, and said nut cannot be turned.
Any suitable means may be employed for holding the key plug 10, in place, and
in Fig. 1, the groove 8, is closed at one end as shown at 11, and it will he
understood that the article or device against which the nut 7, abuts at the opposite
side will hold the key plug in position, and said key plug may be conical in
form, if desired, which would also, prevent the longitudinal movement thereof
when in place.
In Fig. 3, the key plug is provided at one end with a shoulder or projection 12,
which operates in a corresponding notch or recess formed in the nut 7, and the
key plug is bent or provided with an arm 13, at its opposite end which is formed
thereon after it is placed in position.