Improvements in or relating to Bolts and Nuts.
Year: 1896

page_text: Date of Application, 27th July, 1896
Complete Specification Left, 19th Aug., 1896-Accented. 10th Oct.
PROVISIONAL SPECIFICATION.
Improvements in or relating to Bolts and Nuts.
I JAMES CORP of No. 1 Gower Place London W.C. in the County of
Middlesex Surveyor do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in bolts and nuts. Its object being to
prevent the nut turning or getting loose after being screwed up to its required
position thus forming a complete safety lock uut.
In carrying my invention into practice, I either use bolts and nuts specially
made for the purpose or any ordinary existing kind of bolts and nuts.
I cut a keyway or groove on one side of the screwed end of the bolt of any
desired length, I then make a key to fit the key way or groove, having one end
enlarged or bent to prevent the key slipping out when the nut is screwed up to its
required position the key being sufficiently long to project beyond the nut. I also
cut or form a groove or grooves in the top of the nut. The nut is then screwed up
to its required position with one of the grooves opposite the key. The projecting
end of the key is then bent over into the groove in the nut thus preventing the
nut turning round.
If preferable a key fornied with a projecting head on one side may be used
which may be driven tightly into the groove in the bolt the projecting head of the
key fitting into the groove in the top of the nut.
Or a washer may be cut in a form to fit the groove or keyway in the bolt so as
to prevent the washer turning round. The washer having a projecting tongue.
Grooves are cut in the base of the nut and the projecting tongue of the washer
bent up into the groove in the nut thus preventing the nut turning round.
Dated this 27th day of July 1896.
JAMES CORP.
I, JAMES CORP of No. 1 Gower Place London, W.C. in the County of
Middlesex, Surveyor, 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 :-
The object of this invention is to prevent the nut from turning round or
becoming loose after being screwed up to its required position, thus forming a
complete safety lock nut.
In describing my invention I refer to the accompanying drawings whereby it
will be seen in Figure 1. that a groove a is cut lengthways in the screwed part of
the bolt, across the thread and as far as the thread extends.
In Figure 2 it will be seen that grooves 6 of the same size as that in the bolt are
cut right across the top of the nut-six grooves for a hexagon nut & four grooves
for a square nut. The bottom of the nut is countersunk, as shown at c.

page_text: Figure 3 shows the key which has a countersunk head & projecting only on one
side of it.
Before screwing on the nut, the key--as shown in section in Figure 4-is inserted
into the groove of the bolt, with the countersunk head of the key in such position
as to ride freely within the countersunk part of the nut. When the nut is screwel
up to its required position that part of the key which projects beyond the nut is
bent over and into any of the grooves which may be desired, and the nut is thus
locked.
If desired, a countersunk washer can be used instead of countersinking the
bottom of the nut.
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
A combination of bolt, nut and key made substantially as herein described for
the prevention of nuts becoming unscrewed from bolts when employed for any
purpose whatsoever.
Dated this 19th day of August 1896.
JAMES CORP.