Improvements in Locking Nuts and Bolt Heads.
Year: 1889

page_text: Date of Application, 9th Aug.. 1889
Complete Specification Left, 8th May, 1890-Accepted, 14th June, 1890
PROVISIONAL SPECIFICATION.
Improvements in Locking Nuts and Bolt Heads.
JOHN KENNEDY SINTON, Inspecting and Consulting Engineer &c. 26 Sandhill
Newcastle-on-Tyne WILLIAM BYERS, Engineer, 23 Lincoln Street Gateshead do hereby
declare the nature of this invention to be as follows :-
We drill a hole through side of nut or bolt head or make a slit by saw cut sufficiently
deep for the purpose of passing a length of wire through the hole or slit from one nut
or bolt head to a neighbouring nut or bolt head, passing same in direction to prevent
nut or bolt head from slacking back, also countersinking holes to allow of head being
put on end of wire, or to bend the end of wire to prevent its being drawn out of hole
or slit through slacking pressure of bolts or nuts through jarring of machinery. Any
number of nuts or bolt heads can be locked by passing wire from one to another to
end of series.
13
11
ou
1
1000
JOHN KENNEDY SINTON.
WILLIAM BYERS.
COMPLETE SPECIFICATION.
Improvements in Locking Nuts and Bolt Heads.
We, JOHN KENNEDY SINTON, 26 Sandhill, Newcastle-on-Tyne, Inspecting and
Consulting Engineer, etc., and WILLIAM BYERS, 23 Lincoln Street, Gateshead-on-Tyne,
Engineer, 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 :-
Our invention relates to an improved method of locking nuts and bolt heads, and
is specially applicable to the nuts and bolt heads of railway fish plates. Our
improvements may also be advantageously employed for locking piston nuts and
bolt heads, the nuts and bolt heads of machinery in general, and in all other cases
where it is necessary to provide an efficient safeguard against any tendency of the nuts
and bolt heads to slack back.
According to our invention we drill a hole through the side of the nut or the
bolt head or make a slit by saw cut sufficiently deep for the purpose of passing a
length of wire through the hole or slit in the one nut or bolt head to a neighbouring
the wire in
nut or bolt head which is similarly provided with a hole or slit. We pass
such a direction as to prevent the nuts or bolt heads from slacking back. We
also countersink the holes to allow of a head being put on the wire or bend the wire
so as to prevent its being drawn out of the holes or slits through the slacking pressure
of the nuts or bolt heads as would occur through the jarring of the machinery or
through other cause.
In order that our invention may be thoroughly understood we have appended the
accompanying sheet of drawings.
Fig. 1 illustrates two nuts A locked together by a wire B passing through plain
holes drilled in the sides of the nuts. The wire B is passed from one nut to the
other, as shown, in such a manner as to prevent the nuts from slacking back or
becoming loosened from any cause, and the ends of the wire are turned or bent
down, as at bb, so as to prevent the wire from passing through the holes in
the nuts.
Figs. 2 and 3 illustrate a nut and bolt head respectively each of which is provided
with a plain hole C.
Fig. 4 illustrates a modified arrangement in which two nuts A' are locked together

page_text: by wires B¹ provided with heads.'. The holes C¹ drilled in the sides of the nuts are
countersunk at one end c¹ in order to receive the heads b¹ provided on the ends of the
wires. The ends of the separate wires B' are knotted or fastened together in any
suitable manner or by any suitable means.
Instead of employing two separate pieces of wire, such as B¹, with a head bat
one end, we may lock .the nuts together by means of a single wire provided at one
end with a head and at the other end left plain, the plain end of the wire being
passed through a plain hole and turned or bent down, as illustrated by Fig. 1.
In employing wires provided with heads to lock the nuts together we might
pass the wires through plain holes and thus dispense with the countersinking of
the holes.
Figs. 5 and 6 illustrate a nut and bolt head respectively each of which is provided
with a hole C which is countersunk at the end c'.
Fig. 7 illustrates a single nut A2 which is locked by a wire B², provided at one end
with a. head and at the other end left plain. The plain end is first passed through
an inclined hole drilled in the metal and is then turned or bent down.
Fig. 8 illustrates two nuts A' locked together by means of a wire B³ passed through
saw-cuts or slits C³, made in the lower surface or face of each nut. The ends of the
wire are turned down, as in the arrangement illustrated by Fig. 1, in order to
prevent the wire from passing through the saw-cuts or slits.
Figs. 9 and 10 illustrato a nut and bolt head respectively each of which is provided
with a saw-cut or slit C, and Figs. 11 and 12 illustrate a square shaped nut provided
with a saw-cut or slit.
In the accompanying drawings we have shown the application of the wire or
wires only to nuts; but it. will be readily understood that the application of the
same to bolt heads is identical.
Any number of nuts or bolt heads may be locked together in the ways herein
described and illustrated.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is.
The improved method of locking nuts and bolt heads substantially as described
herein and illustrated by the accompanying drawings.
D.11.
1000
JAMES STEVENSON,
Gray's Inn Chambers, 20, High Holborn, London, W.Ć., Agent for Applicants.