Improvements in or connected with Look-nuts.
Year: 1896

page_text: Date of Application, 19th Nov., 1896-Accepted, 9th Jan., 1897
COMPLETE OF PULICATION
Improvements in or connected with Look-nuts.
We, JOHN JONES HARRIES and EDWARD HOBART BURGESS both of 5, Park Hill
Terrace Charlton Road, Charlton, London, Gentlemon, 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 improvements in or connected with lock-nuts, the object of
which is to provide simple means for keeping the nut of any ordinary bolt or the like
fast or secure when once screwed up, in such a manner as to prevent its coming
loosened by reason of vibration or any other cause, while the means we employ is
extremely simple aud there is nothing to be deranged or to get out of order by
constant use.
In order that our invention may be fully understood, we will now proceed to
describe same with reference to the accompanying drawings in which Fig. 1 is a
side elevation of a bolt fitted with our improved locking nut and washer, shown
as screwed up, and Fig. 2 is a similar view with the parts separated. Fig. 3 is an
underside view of the nut and Fig. 4 is a plan of the washer.
According to our invention the underside of tho nut n is cut away or tapered,
while the washer w is correspondingly formed and by this means, when the parts
are screwed up the thickened ond of the nut a bears or rests upon the thin side
of the washer while in a like manner the thickened side a' of the washer corresponds
with the thin side of the nut as shown (Fig. 1). It will thus be seen that any jolting
or the like tending to shift the nut would compel the thickened or deepened side a of
the nut to ascend a slight inclined plane, formed by the tapered washer, and which it
is unable to do when acted upon merely by the slight forces of any ordinary vibration.
The washer and the nut may be provided with any small mark or nick upon the sides,
of same, as shown in Figs. 1 and 2, to indicate the parts which are to be brought
opposite one another, and in tightening up the nut it is necessary before giving the
fioul turn to bring the washer round to such a position that the said marks are
opposite one another approximately, or to such a position as will allow of their being
brought opposite to one another when the nut is finally tightened.
b merely represents a plate or other article upon which the nut is to be tightened.
In order to further prevent the nut turning independently of the washer or to
provent the nut and washer turning together when subjected to vibration or the
like, the under surface of the nut and both surfaces of the washer may be roughened
or serrated, or it may only be found necessary to roughen the two surfaces of the
washer.
Having now particularly described and ascertained the nature of our inven-
tion, and in what manner the same is to be performed, we declaro that what we
claim is :-
1. The improvements in or connected with locking uuts, consisting of a nut having
a cut away or inclined under surface in combination with a washer having a
correspondingly and oppositely formod cut away or inclined top surface, substantially
as herein described and shown and for the purposes specified.

page_text: 2. The improvements in or connected with locking nuts, substantially as herein
described and shown, and for the purposes specified.
Dated this 19th day of November 1896.
F. G. CASSELL
(Of Cassell & Co.),
22, Glasshouse Street, Regent Street, London, W.,
Agent for the Applicants.