AN IMPROVED NUT LOCK
Year: 1885

page_text: I, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Wm. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent
Agents, do hereby declare the nature of the said Invention for "AN IMPROVED
NUT LOCK" a communication to me from abroad by William Marion Rice of
Kankakee City in the County of Kankakee and State of Illinois, United States
of America to be as follows:-
This invention relates to means for preventing nuts from working or becoming
loose and the invention consists in the combination with a bolt having threads in
reverse direction, of a cup shaped spring washer, which bears against the object to
which the bolt is applied.
The bolt at its extreme end is turned down so as to form a stem or smaller
portion and it bears upon its largest diameter and for a portion of its length,
a right hand screw thread, and upon the stem, a left hand screw. thread, each
screw thread having its appropriate nut. In applying the bolt, the washer is first
passed on the threaded end of the bolt, so as to come against the article or object
through which the bolt is passed, and the main nut is first screwed on the larger
part of the bolt, having the right screw thread and then a smaller nut is screwed
on the stem. By this means the combined effect of the washer and the locking
nut is to prevent the main nut from turning or becoming loosened by jars or
shocks.

page_text: I, ALEXANDER MELVILLE CLARK, of the firm of A. M. and Wm. Clark, of
53, Chancery Lane, in the County of Middlesex, Fellow of the Institute of Patent
Agents, do hereby declare the nature of this Invention (a communication to me
from abroad by William Marion Rice of Kankakee City in the County of
Kankakee and State of Illinois United States of America) and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement:―
The object of this Invention is to prevent nuts from becoming loose and the
Invention consists in the combination of a spring-washer with right and left
handed nuts screwing upon correspondingly threaded portions of the bolt of
different diameters.
Reference is to be had to the accompanying drawings forming part of this
specification in which a side view of a bolt provided with this improved nut lock
is shown, parts being in section.
The bolt A which may have any suitable head is provided with the right handed
screw thread B and with the left handed screw threaded end portion C of less
diameter. A cup-shaped spring washer D is interposed between the work or
object E through which the bolt is passed and the main nut F and bears against
the work in the manner shown. The nut F is screwed on the part of the bolt
having the right screw thread B and a smaller nut G is screwed on the oppositely
threaded part of smaller diameter. The combined effect of the spring washer D
and nut G is to prevent the main nut F from turning or becoming loosened by
repeated jars, vibrations, shocks, etc.
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 ;-
The combination with the bolt A having the screw thread B and the oppositely
screw-threaded end portion C of less diameter, of the cup shaped spring washer D
and the nuts F and G screwing on the parts B and C, substantially as herein
described and shewn in the drawing.