Improvements in Lock Nuts.
Year: 1897

page_text: Date of Application, 23rd Aug.. 1897
Complete Spanification Loft 23rd May 1808 Accented 2nd July 1808
PROVISIONAL SPECIFICATION.
Improvements in Lock Nuts.
I, GEORGE ALBERT BOLTON, Mechanical Engineer, of 37, Daubeney Road, in
the County of London, do hereby declare the nature of my said invention to be
as follows:-
The object of this invention is to provide a lock nut which, when once screwed
home shall remain in place securely and not be loosened either by vibration
shock, or otherwise.
In accordance with this invention I make the lock-nut in two parts one which
I shall hereinafter call the nut, the other which I shall hereinafter call the cap.
The nut has a lower portion which is in all respects like an ordinary nut.
Made in one piece therewith and rising therefrom is a cone, the base whereof (of
The nut and cone
less diameter than the nut) rises from the lower part or nut.
are threaded to fit the bolt or male screw. The cone has one or more slits extend-
ing from the top to the base.
The cap is externally of the shape of an ordinary nut, internally its lower part
is a hollow cone closely fitting over the cone on the nut; the upper part of the
cap has a thread fitting the male screw or bolt.
In some cases I insert in the slit or slits of the cone on the nut holding pieces,
these are slips of steel preferably having a knife-edge on one side. The slips
may also have an extension at their lower end that is to say they may be shaped.
Now when the nut is in place the cap is screwed down upon it, the conical
part of the cap compresses the split cone on the nut and thus holds the nut in
place. Where the slips hereinabove mentioned are used they serve as an additional
security preventing the nut "running back" and thereby becoming loose.
Toted this 23rd day of August 1897.
BERNHARD DUKES,
220, High Holborn, London, W.C., Agent for the Applicant.
Improvements in Lock Nuts.
I, GEORGE ALBERT BOLTON, Mechanical Engineer, of 37, Daubeney Road, in
the County of London, 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 provide a lock nut which when once screwed
home, shall remain in place securely and not be loosened either by vibration,
1
thamvico

page_text: In accordance with this invention I make the lock nut in two parts, one which
I shall hereinafter call the nut, and another which I shall hereinafter call the cap.
The nut has a lower portion which is in all respects like an ordinary nut.
Made in one piece therewith, and rising therefrom, is a cone, the base whereof (of
less diameter than the nut) rises from the lower part or nut.
The nut and cone are threaded to fit the bolt or male screw. The cone has
one or more slits extending from the top to the base.
The cap is externally of the shape of an ordinary nut, internally its lower part
is a hollow cone closely fitting over the cone on the nut; the upper part of the
cap has a thread fitting the male screw or bolt.
In some cases I insert in the slit or slits of the cone on the nut, holding-pieces;
these are slips of steel preferably having a knife-edge on one side. The slips
may also have an extension at their lower end, that is to say, they may be L-shaped.
Now when the nut is in place, the cap is screwed down upon it, the conical
part of the cap compresses the split part on the nut and thus holds the nut in
place. The slips hereinabove mentioned prevent the nut running back, as if it
is attempted to turn the nut before the cap is removed, or if vibration, say, tends
to do so, the slips cut into the thread and prevent movement of the nut, it will
thus be evident that this lock-nut holds the part or parts on which it is used with
absolute security.
I have illustrated this invention in the accompanying drawings in which:
Fig. 1 is an elevation of a screw-bolt with the whole device on it, ready to be
put into operation.
Fig. 2, is a view similar to the former, with the cap and nut in section.
Fig. 3 is a plan of the nut.
Fig. 4, is an elevation, on an enlarged scale, of one of the slips, and
Fig. 5, is a plan of Figure 4.
Like letters represent like parts in all the figures of the drawings in which A
is the bolt, B, is the nut on the upper part of the nut B, is provided the cone b,
which has slits b₁, C, is the cap the interior of which, at its lower part forms a
hollow cone as shown at c, fitting the conical portion of the nut. D are the slips;
these have knife-edges as shown at d, and may have extensions d¹ if desired. I
prefer to make the slips of steel although other suitable material may be employed.
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 lock-nut consisting of the nut properly so called the nut having a cone with
one or more slits for the reception of slips (these slips having knife-edges and, if
desired, lateral extensions) and of a cap, all constructed and arranged, and operat-
ing, as and for the purposes set forth.
T
00 1
י
1000
མ་
BERNHARD DUKES,
226, High Holborn, London, W.C., Agent for the Applicant.