An Improved Nut Lock Washer.
Year: 1892

page_text: Date of Application, 29th Feb., 1892-Accepted, 2nd Apr., 1892.
COMPLETE SPECIFICATION.
[Communicated from abroad by THE ECLIPSE PATENT NUT LOCK WASHER
COMPANY, LIMITED, of Newtown, near Sydney, in the Colony of New South
Wales.]
An Improved Nut Lock Washer.
1, OLIVER IMRAY, of No. 28 Southampton Buildings, Chancery Lane, in the
County of London, Chartered Patent Agent, 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:-
This invention relates to a washer for use under the nut of bolts or under the
head of screws or screw-bolts which washer will prevent the oscillation or vibration
or other influences on the bolt or screw from loosening or unfastening the nut or
screw. This invention has been devised in order to provide a washer or plate
which being easily and conveniently stamped or cut out in certain peculiar fashions
will of itself form an effective and efficient lock on the nut or on the head of the
screw or bolt.
This improved nut lock washer consists of a metal plate or washer having a hole
for the bolt or screw or having a series of such holes and having cuts or slits forming
a three sided square or oblong or rectangle around such hole in such a way and of
such a size that the two opposite sides of such square or oblong are adapted to grasp
or embrace the nut or the head of the bolt. Instead of having the three slits or
cuts a modified construction of this lock washer would have four cuts or slits cach
two of which form a right angle and each right angle being diagonally opposite the
other so that the two angles would be adapted to grasp or embrace the nut or the
head of the bolt. A further modification might have but two cuts or slits forming
one angular catch or a still further modification might have two distinct but joined
cuts or slits at each corner or cardinal point of the washer or around the hole
forming four distinct augular catches. The plate or washer must of course have
some means or contrivances for holding it from turning except when it takes over
two or more bolts or screws. For woodwork it may have turned down corners or
turned down edges to enter and hold on the wood and for that and other work it
might have set screws pins or like means of holding it or it may be of such a shape
(say with flanges edges to grasp the work or say to but against some protuberance
on the work) as to hold itself from turning.
But in order that this invention may be clearly understood reference will now be
made to the drawings herewith in which
Figure is a perspective view of a rail joint with fish plates and this improved
nut lock washer in use on each bolt.
Figure 2 is a plan of a plate or washer having double mut locks for use on a
double or bulb headed rail.
Figures 3 and 4 are plan and edge view respectively of an improved lock washer
constructed according to this invention in the particular form in which I prefer to
use it for railway joints.
Figure 5 is a plan of a modification of same with two angular catches or stops.
Figures 6 and 7 plan and edge view respectively of an improved lock washer
having turned over corners for catching in woodwork soft metal and such like and
it is shown as having one angular catch whereas it might be of the other forms
shown.
Figure 8 is a plan of a modified lock washer having four angular catches or stops
and a stop pin or set screw.
In Figure 1 an independent nut-lock washer A is placed upon each bolt of the
joint which at each hole is stamped or cut away as shown in Figure 3. Figure 2
shows a nut-lock washer for taking over two bolts Figures 3 and 4 as well as

page_text: Figure 2 show how each washer is punched or stamped. Partly around the hole B
is the flattened horse-shoe shape orifice. C which orifice has flats C1 and C2 circular
inside C³ and rounded ends C. In the modifications Figures 5 to 7' there are
shown slits which need not necessarily be parallel slits but may partake of the
character of the orifice C around the hole in Figures 2 to 4. The.. nut-lock:
washer A in Figure 3 is prevented from turning by its base which is preferably
slightly concave (and its opposite side or top preferably paral el or convex) taking
on the flange of the rail or other protuberance on the article on which it is used.
But the washer may have other means of preventing it turn g such as set pin or
screw as in Figure 8: turned over corners as in Figures 6 and 7'or flanges suitable
to the object on which it is used or where the bolt is prevented from turning by a
flat or key fitting a corresponding flat or keyway on or in the bolt.
:.
Any method or manner of manufacturing this improved washer might be utilised
but it is preferred that they should be made by one movement of a press which
-carrying a die and a matrix would out of bar or plate iron or other metal punch the
bolt hole and make the necessary orifice or slits or cuts.
1:
In use it is only necessary to prevent the washer from turning by any of the
methods mentioned and to screw up the nut or the bolt so tightly that the nut or
the head will be "
"square. on to the slits when a chisel or wedge or other article
will lift the outer part of the plate or washer so as to take round or embrace two
or more of the faces or sides of said mnt.or head.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
First: An improved nut-lock washer (adapted to be. fixed against turning)
having the bolt hole and surrounding such bolt hole on three sides an orifice or
cuts or slits so that the outer part will. form a grip for the nut or the head of a
screw bolt substantially as herein described and explained.
Second. An improved. nut-lock washer or plate constructed substantially as
herein described and explained and as illustrated in Figures 1 to 4 of the
drawings.
Third. The modified constructions of improved lock washer constructed sub-
stantially, as herein described and explained and as illustrated respectively in
Figure 5 Figures 6. and .7/and Figure 8 of the drawings.
Dated this 29th day of February One thousand eight hundred and ninety-two.
ABEL & IMRAY,
Agents for the Applicant.