LOCK NUTS
Year: 1885

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I HENRY BURGESS YOUNG, Engineer, of Victoria Parade, Barnstaple, in the
County of Devon, do hereby declare the nature of my Invention for "LOCK NUTS'
to be as follows:-
The object of my Invention is to make a nut, complete in itself, that will not
become loose on a bolt or screw by vibration; to accomplish this I take an ordinary
forged nut and saw it so as to partially divide one end from the other, I then make
it sufficiently hot to hammer or press down the uncut part enough to close the saw
cut, the nut is then to be tapped, and one end, opposite the uncut part, sawn
through from one side into the bolt hole; jaws will thus be formed which by being
squeezed or forced slightly inwards will elastically grip a bolt or screw sufficiently
tight to prevent its becoming loose by vibration.
A modification consists in partially dividing the ends of the nut by two opposite
saw cuts in the same plane and sawing through one end at both sides into the bolt
hole; the heating and closing, tapping, and pressing the jaws inward, is to be
performed in this as in the previous instance.
I HENRY BURGESS YOUNG, Engineer, of Victoria Parade, Barnstaple, in the
County of Devon do hereby declare the nature of my invention for "LOCK NUTS"
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 my invention is to make a nut, complete in itself, that will not
become loose on a bolt or screw by vibration; to accomplish this I take an ordinary.
forged nut and saw it so as to partially divide one end from the other, I then make
CD en

page_text: it sufficiently hot to hammer or press down the uncut part enough to close the saw
cut, the nut is then to be tapped, and one end, opposite the uncut part, sawn
through from one side into the bolt hole; jaws will thus be formed which by being
squeezed or forced slightly inwards will elastically grip a bolt or screw sufficiently
tight to prevent its becoming loose by vibration.
A modification consists in partially dividing the ends of the nut by two opposite
saw cuts in the same plane and sawing through one end at both sides into the bolt
hole; the heating and closing, tapping, and pressing the jaws inward, is to be
performed in this as in the previous instance.
DESCRIPTION OF DRAWINGS.
Figs. 1. and 3. are side views and Figs. 2. and 4, top views shewing how a nut
may be made according to this invention.
Firstly, the blank or forged nut is transversely sawn as shewn by Fig. 1. and to
the depth shewn by the dotted lines in Fig. 2, it is then made hot enough to allow
of the solid part, a. being hammered or crushed down close as shewn by Fig. 3; it
is then to be tapped parallel throughout, after which the top is to be sawn through
from the side to the bolt hole and the jaw, b, which has been thus formed, forced
slightly inwards and the nut completed as shewn by Fig. 4.
A modification is represented by Figs. 5. 6. 7. and S. Two opposite transverse
saw cuts are bere made as shewn by Figs. 5. and 6, the solid parts, c. are to be
beated and crushed down so as to entirely close. the cuts as shewn by Fig. 7, the
top is now to be sawn from both sides into the bolt hole and the jaws d. pressed
inwards and the nut completed as shewn by Fig. 8.
Having now described the nature of the said Invention and in what manner the
same is to be performed, I declare that what I claim is
First. Constructing Lock Nuts substantially in the manner herein shewn and
described.
Second. Closing the transverse cuts so that there may be no clear or intervening
space between the top and bottom parts of the nut substantially in the manner
herein shewn and described.
Third. Parting the top from one or both sides of the nut into the bolt hole to
form lateral jaws and forcing the same inwards so that when the nut is screwed on
a bolt the elastic jaw grip will prevent its unturning, substantially in the manner
herein shewn and described.