IMPROVEMENTS IN LOCK NUTS AND BOLTS
Year: 1884

page_text: I THOMAS KILNER MELLOR of Wood Bank Halifax Old Road Huddersfield in
the County of York Stockbroker do hereby declare the nature of my Invention
for IMPROVEMENTS IN LOCK NUTS AND BOLTS to be as follows:-
This Invention has reference to those nuts and bolts known as bolt nuts such as
are used in cases where it is required that the nut when screwed up to its proper
position upon the bolt should not be liable to be shaken loose by any vibration or
inovement of the machinery of which it forms a part.
I accomplish this by inserting a pin or wire longitudinally between the nut and
the bolt and I make room for the insertion of this wire by cutting a key way or
groove across the threads of the bolt and of the nut. These grooves will be about
the breadth and depth of the threads across which they are cut and when brought
into position the one over the other a space or channel will be formed between the
nut and the bolt into which the wire can be introduced.
There may be one or more grooves in the nut or the bolt or in either of them
and they may extend the whole length of the threaded portion of the bolt and of
the nut or only partially so.
The end of the wire which is introduced between them will be brought to the
surface again by a groove at the bottom of the nut or by a hole through its
substance.
The two ends of the wire or pin will then be turned over or twisted together in
such a manner that the wire cannot become loose or fall away and so long as it
remains upon the bolt the nut cannot be unscrewed on account of the obstruction
caused by the wire.

page_text: I THOMAS KILNER MELLOR of Wood Bank, Halifax Old Road, Huddersfield in
the County of York, Stockbroker do hereby declare the nature of my said
invention for "IMPROVEMENTS IN LOCK NUTS AND BOLTS" and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement aided by the annexed drawing:-
This Invention has reference to those nuts and bolts known as lock nuts, such as
are used in cases where it is required that the nut when screwed up to its proper
position upon the bolt should not be liable to be shaken loose by any vibration or
movement of the machinery or structure of which it forms a part.
Reference is to be had to the accompanying drawings forming a part of this
specification in which:
Fig. 1 shews front view of one of the key ways or grooves and the wire and nut
in position therein.
Fig. 2 is a side view shewing another groove in spindle of bolt.
Fig. 3 is a like view, the bolt and nut being in section.
Figs. 4, 5 are plan views of Figs. 2 and 3 the latter in section.
Fig. 6 is plan view shewing nut and bolt having two grooves or key ways.
Fig. 7 example of bolt and nut securing plates etcetera
At A is the bolt in the threaded portion of which is cut or formed the recess or
groove B there may be two or more such grooves. E is the nut in which is bored
or formed the hole F, when the hole F is turned opposite or over one of the
grooves B. an inclined or angular passage way is formed for the wire G the latter
filling the said passage way and the space between the threads of the bolt and of
the nut whereby the two become locked and immovable so long as the wire is
therein, to secure the wire in position it is only necessary to bend or clench the
ends as shewn and for removal to straighten one end and the wire may be
withdrawn.
The number of grooves B and holes F may be varied as desirable for any use or
requirement.
I am
aware that longitudinal grooves and longitudinal keys have been
employed also cross pins passed through the bolt, and set screws have been
passed through the nut so as to bind upon the thread or bolt and to these I lay
no claim.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is:
The bolt, nut, and holding or locking wire in combination and as shown by
drawings and herein described.