Year: 1894

page_text: .
I, JAMES NEWNS of 174, Clares Gardens, Oulton Place, Chester, Machine
Fitter, do hereby declare the nature of this invention to be as follows,
This invention relates to an improved construction of lock nut, and is intended to
provide a simple and inexpensive device by which the nut may be fixed easily and
Beourely..
"
.
An ordinary nut is formed with deep longitudinal grooves or recesses, cut
vradially on the inside or threaded part of the nut, thus cutting away part of the
thread, so that it only extends for about half the internal oircumference..... On top
of this is fitted the locking arrangement consisting of a nut of similar shape, but
preferably of much less depth having legs projecting from its under surface and
taking into the recesses above mentioned. These legs only occupy about half
the recesses, so that the nuts can be turned a short distance relatively to each other.
A screw thread corresponding to that in the ordinary nut is formed ou the legs so
that when the nuts are placed together, the thread will be broken only at the parts
which are not filled up by the said legs. The two sections thus form practically
one nut, divided into upper and lower parts, the upper one being capable of turning
through a small portion of a circle rolatively to the lower.
I
When the nut has been screwed down to the proper position, the upper portion
is given a turn farther, the slots permitting of the legs moving, slightly.... This
causes: the two parts to bite together and on to the thread of the bolt, thus fixing
the nut securely, and preventing it being loosened by any strain that may occur,
and to further increase the efficiency of the locking arrangement, the recess may be
out slightly eccentric, so that on turning the locking piece the legs may be caused
to bite tightly on the bolt. I
1
I preferably arrange the parts so that when fitted together they may have the
¡ appearance of a single nut, the depth of which is, about the same as that of the usual
form of nut.
If the parts do not fit quite closely togethor, a thin washer may be placed between
them allowing for any slight play. After the nut gets loose through wear it can
be tightened by removing a small portion from the sides of the legs."
This arrangement is applicable not only to the ordinary hexagonal nuts, but to
circular or other shaped nuts, and also to any arrangement for the purpose of
locking screws. No separate parts are required in fixing, the device, being
manipulated as if in one piece.
dodhtontember 1904.

page_text: I, JAMES NEWNS, of 174 Clares Gardens, Oulton Place, Chester, Machine
Fitter, 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 :—
My invention relates to a simple and efficient lock nut and is illustrated in the
accompanying sheet of drawings in which
Fig. 1 represents a bolt provided with my "Improved look nut in its unlooked
position, the nut being in section.
Fig. 2 represents inside plan views of the two parts forming the lock nut,
Fig. 3 is a plan view of the nut in its 'unlocked position and
Fig. 4 is a similar view illustrating the nut looked.
3 "
.
.: 1
In carrying my invention into practice I provide on the part b forming one part
of the lock nut radial projections c which are adapted to enter recesses or groovesic
cut on the inside or threaded part of the nut btwhich forms the remaining part of
my improved lock nut. The said grooves or recesses o do not extend entirely
*round' in the nut but leave threaded portions o¹.
"
The two parts bb being placed together, the projections centering the recesses c
as shown in Figs. 1 and 3, the parts forming the nut are then screwed upitogether
still the part b butts against the fish plate or whatever it may be requiredito fasten
together.
34
The part is then given a slight turn as shown in Fig. 4; thereby looking the two
parts securely together.
11
'
I may in order to more securely look the said parts form the grooves of eccentric
so that the said projections c may tightly when turned engage with the same.
By reason of the projections entering the grooves or recesses all chance of the
"part 6 becoming detached is avoided should the said part work loose,tasithé parts
dannot separate till the entire nut is screwed back off the bolt. 1.
Li
Should the parts not fit together tightly I place between the 'same any
suitable form of washer...
4 1
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.-
ניד
(1) A lock nut comprised of two parts bb' the part 6 having projections adapted
to enter grooves recesses in the part, & substantially as, and for the purposes
specified.
..
T
(2.) A lock nut as set forth in the above claim, but having the grooves or recesses
eccentric so as to tightly engage the projections substantially as set forth.go
(3.) A lock nut substantially' as described with reference to the accompanying
drawings.
Dated' this 18th day of June 1895.
י.
1.
1
'