An Improved Nut Locking Device.
Year: 1892

page_text: Date of Application, 30th Dec., 1892
Complete Specification Left, 16th Sept., 1893-Accepted, 21st Oct., 1893
PROVISIONAL SPECIFICATION.
An Improved Nut Locking Device.
I, CHARLES EDWARD SHORTT, of Foxton, in the Provincial District of
Wellington, in the Colony of New Zealand, Accountant, do hereby declare the
nature of this invention to be as follows:-
The object of my invention is to provide a ready, cheap, and effectual means
of locking nuts upon bolts and more especially such bolts as are subject to great
vibration such as those used for the fish bolts of railways and tramways and the
like; and in such a manner that the nuts may be interchangeable and can be
applied to any bolt having a similar thread.
I accomplish these objects by drilling a hole transversely through the nut at
right angles to the bolt or thereabout and in such a position that the said hole
cuts away a portion of the internal thread of the said nut and I make the hole
of such a size that a pin may be driven tightly into the said hole without bending
or injury.
This pin I form (by preference) of round hardened steel, slightly tapered and
with the entering end ground off to a square or inclined surface.
When the nut is completely screwed up in its place the pin is driven into the
hole and in its passage cuts away a portion of the bolt or the thread of the bolt
forming a transverse groove which effectually prevents the nut from turning or
becoming loose and the nut is completely locked until the said pin is removed.
Dated this 29th day of December 1892.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for Applicant.
COMPLETE SPECIFICATION.
An Improved Nut Locking Device.
I, CHARLES EDWARD SHORTT, of Foxton, in the Provincial District of
Wellington, in the Colony of New Zealand, Accountant, 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 :-
.
My invention relates to an improved nut locking device and the object of my
improvement is to provide a ready, cheap, and effectual means of locking nuts upon
bolts and more especially upon such bolts as are subject to great vibration such as
those used for the fish bolts of railways, tramways, and the like; and I do this
in such a manner that the nuts may be interchangeable and can be applied to any
bolt having a similar thread.
I attain these objects by the mechanism illustrated on the accompanying
drawings, in which—
Figure 1 is a vertical section of the bolt and nut.
Figure 2 is a plan of the same.
Similar letters refer to similar parts in both the views.
(a) is a bolt of ordinary manufacture.
(b) is the nut which has a hole (c) formed through it as shewn.
(d) is a pin or key formed to fit into the hole (c).
The pin or key (d), I form (by preference) of round hardened steel, slightly
tapered and with the entering end (d') ground off to a square or inclined cutting
surface.

page_text: When the nut is completely screwed up in its place the pin (d) is driven into the
hole (c) and in its passage cuts away a portion of the bolt or part of the thread of
the bolt forming a transverse groove in the said bolt which effectually prevents the
nut from turning or becoming loose; the nut being thus completely locked until
the said pin is removed.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed I declare that what I
claim is,
In a bolt and nut a hole such as (c), formed on the nut so as to receive a pin or
key (d), having a cutting edge as and for the purposes substantially as described
herein and illustrated in the accompanying drawing.
Dated this 14th day of September 1893.
MARKS & CLERK,
13, Temple Street, Birmingham, Agents for the Applicant.