Improvement in Bolts for Locking Nuts.
Year: 1890

page_text: Date of Application, 5th Aug., 1890
Complete Specification Left. 29th Aug., 1890-Accepted, 11th Oct., 1890
PROVISIONAL SPECIFICATION:
Improvement in Bolts for Locking Nuts.
I WILLIAM CHATTAWAY Work's Manager, 214 Great Bridge Street; West
Bromwich do hereby declare the nature of this invention to be as follows
--
I make (by drilling punching or any other convenient process) a hole in the
screwed end of the bolt; in the centre or any other part of the end contained inside
the screw thread; so that, when the nut is screwed sufficiently, and in its place, 1
insert a punch (or other tool suitable for the purpose) and by striking the said punch
or tool with a hammer (or by any suitable device) to spread out and enlarge the
end of the bolt just inside and outside the nut, and by so doing, lock it; thus
preventing the nut from working off by vibration or other causes.
These bolts may be fastened and the nuts removed any number of times with the
greatest facility. They are reliable and effective and especially useful as fish-bolts
or in any position where there is constant movement, jar or vibration.
Dated this 4th day of August 1890.
WILLIAM CHATTAWAY.
COMPLETE SPECIFICATION.
Improvement in Bolts for Locking Nuts.
I, WILLIAM CHATTAWAY, Works Manager 214 Great Bridge Street West
Bromwich in the County of Stafford do hereby declare the nature of my said
invention and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement :-
I make (by drilling, punching, or any other convenient process) a hole in the
screwed end of the bolt-in the centre or any other part of the end contained inside
the screw-thread-so that when the nut is screwed sufficiently, and in its place I
insert a punch (or other tool suitable for the purpose) and by striking the said punch
or tool with a hammer (or by any suitable device) to spread out and enlarge the
end of the bolt just inside and outside the nut and by so doing lock it; thus
preventing the nut from working off by vibration or other causes.
These bolts may be fastened and the nuts removed any number of times with the
greatest facility. They are reliable and effective and especially useful as fish bolts
or in any position where there is constant movement, jar or vibration.
In order that my invention may be clearly understood and more easily carried into
practical effect I have appended hereunto a sheet of drawings upon which I have
illustrated an example thereof.
Figure 1 is a side view of the bolt before it is locked by my new method though it
is supplied with the means for doing so.
Figure 2 is an end elevation of the nut B shewing the hole a¹.
Figure 3 is a longitudinal section of the bolt as seen at Figure 1.
Figure 4 is a longitudinal section of the same bolt and nut after the nut is locked
as seen at a².
Figure 5 shows one kind of suitable punch to be used in locking the nut but this
may be greatly varied in both section and otherwise as a square, hexagon or other
polygonal section would serve the purpose and sometimes be more effective.
The drawings show an ordinary bolt and nut such as would be used for fish plates
on railways. As seen at Figure 2 I drill the hole a' in the end either at the centre
or nearer one side. I then apply the end p of the punch P and by striking it a
smart blow or two the metal is opened out in a similar manner to that shown at
Figure 4 by a and this enlargement acts like a rivet head to prevent the nut from
Price fid

page_text: running back under vibratory or other actions. It will be evident that I may make
the hole deeper or shallower of any size or shape but a simply drilled hole serves
the purpose.
When the hole is made on one side the centre it is also very effective.
The bolts may be made of any suitable metal.
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 1
claim is
.
The improvements in bolts for locking nuts substantially as herein set forth and as
shewn upon the drawings.
Dated this 28th day of August 1890
GEORGE BARKER,
77, Colmore Row, Birmingham, Agent for Applicant.