Year: 1888

page_text: I, JOSEPH EMILE LANSARD, of 216 Goswell Road, in the County of Middlesex,
Engineer, do hereby declare the nature of this invention to be as follows:-
This Invention relates to an improved nut-lock for securing the nuts of railway fish
plates, and machinery generally; and it consists in forming notches in the under-face
of the nut and in the employment between the nut and the part to be held, of a spring
washer adapted to engage on the one hand with the part to be held and on the other
with the under face of the nut.
The washer is severed or cut across, from the inner to the outer circumference, and
one portion is so formed as to act as a spring nib or catch which, when the nut is
screwed home, will engage with one of the series of notches in the nut and thereby
prevent the nut accidentally unscrewing independently of the washer which is
itself prevented from turning, by engaging with the part against which it abuts.
For this purpose, the washer which is of tempered steel, may have rasp-like teeth
punched up on its under face, or it may have a small dowel-pin fixed or formed on it,
which will enter a corresponding hole in the part against which it abuts.
Or, the washer may fit on, or engage with, a squared or other part of the bolt itself,
so as to be prevented from turning.
The engagement of the spring nib or end of the washer, may be such that it will
yield and allow the nut to be unscrewed by a spanner, although it will not permit it
to work loose by vibration.
Or, it may be such that the spring nib must be forcibly disengaged from the nut
before the latter can be unscrewed.
In either case, a packing piece may be pivoted to the washer and so applied behind
the spring part of the washer as to prevent it yielding until such packing piece is
removed.
Instead of employing a spring washer, the spring may be on the nut itself, and a
split washer inserted between the nut and the part against which it abuts.
Dated this 24th day of February 1888.
J. E. LANSARD.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.

page_text: I, JOSEPH EMILE LANSARD, of 216, Goswell Road, in the County of Middlesex,
Engineer, 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 an improved nut-lock for securing the nuts of railway fish-
plates applicable also to nuts and set screws generally; and it consists in the
employment, between the nut and the part to be held, of a spring detent which may
be formed on or attached to a washer and which is adapted to engage with notches
formed in the under face of the nut or set screw head, as the case may be, the washer
being prevented from rotating as hereafter described.
Reference is to be had to the accompanying drawings forming part of this specifi-
cation wherein figures 1 and 2 shew the spring in one with the washer. Figures 3
and 4 shew the spring made separate and rivetted to the washer. Figures 5 and 6
shew another form of washer, with the spring made separate, as in figures 3 and 4,
and screwed to the washer, the device being shewn in figure 5 as applied to a set
screw. Figure 7 shews an under face view and section of a spring washer similar to
figure 6 except that the spring is rivetted on and the washer has a lug to prevent it
turning. The same letters of reference indicate like parts in all the figures.
с
In figures 1 and 2 the washer a is severed or cut across radially from the inner to
the outer circumference, and one portion b is so formed as to act as a spring and is
provided with a nib or catch b' which when the nut is screwed home will engage with
one of the series of radial notches c in the under face of the nut or set screw head and
thereby prevent accidental unscrewing. For this purpose the washer for about one-
third, more or less, of its circumference from the point where it is severed is made of
diminished thickness by the removal of metal from the rear-side or otherwise as shown
in figure 1 so as to leave a vacant space at the under side of the washer whilst a
radial nib b' is formed at the extremity of this spring portion b, such nib standing up
from the face of the washer so as to engage in the radial notches c of the nut or set
screw head. The washer is, in this case, hardened and tempered and is itself prevented
from turning by engaging with the part against which it abuts. This engagement
may be effected either by means of rasp-like teeth punched up on the under face of
the washer or by a small steady pin d entering a corresponding hole in the part against
which the washer abuts. Or, the washer when used for locking a nut may fit on a
squared or other part of the bolt so as to be prevented from turning, as will be readily
understood.
The nib 6 would be bevelled so as to offer little or no obstruction to the screwing
up of the nut or bolt and may either be of the form shewn in figure 3, so that the
spring nib must be forcibly disengaged from the nut or set screw before the latter can
be unscrewed or the nib may be bevelled on both sides, as in figures 1 and 2, so as to
yield and allow the nut or bolt to be unscrewed by a spanner although it will not

page_text: permit it to work loose by vibration. In either case, a packing piece e may be pivoted
to the washer as in figure 2, and (after the nut has been screwed home) turned round
so that it comes behind the nib 6' in order to prevent it yielding until such packing
piece is removed.
Instead of forming the spring in one with the washer, I prefer to stamp the latter
out of sheet iron, as in figures 3 and 4, and to rivet or otherwise attach a spring b
having a nib b¹ as above described, said spring being of less thickness than the
washer and applied to work in a cavity therein and to engage with the notches
in the nib or set screw head as above described. The rivet à may also act as a
steady pin.
Instead of using a spring of the curved form shewn in figures 3 and 4, 1 may use a
straight spring as in figures 5 and 6, the washer being enlarged at one side to admit
of fixing the tail end of the spring to it which is effected by a set screw d screwing
into a tapped hole in the washer the point of the screw being received in a plain hole
in the part against which the washer abuts and acting as a steady pin to prevent the
washer rotating. In this case, the spring may be released from the notches c by
slacking the screw d. The spring may be rivetted to the washer as in figure 7, and
the washer may have a steady piece or lug d¹ bent up at its under side to engage in a
notch chipped out in the part to be bolted.
Instead of the spring being fixed to the washer, it may be fitted in a recess in the
nut or set screw head and engage with a notched or split washer inserted between the
nut or set screw head and the part against which it abuts, the washer being prevented
from turning by a steady pin, as before.
It will be observed that the radial notches c are comparatively narrow and remove
but little of the bearing surface of the set screw head or nut. It will also be obvious
that the sides of the notches may be perpendicular to the face as in figure 1, or be
bevelled or inclined as in figure 5.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, 1 declare that what I
claim is :-
1. The combination with a nut or set screw head having radial grooves in its under face,
of a washer having a spring nib formed on or attached to it and adapted to engage
with said notches, as described, and free to yield or spring backwards under the
pressure of the nut or set screw head, as described.
2. The combination with a washer having a spring nib formed on or attached to it,
as described, of a pivoted packing-piece adapted to be introduced behind the spring-
nib for the purpose of locking it in engagement with a radial groove in the nut or set
screw head, as described.
3. The herein described construction of washer with spring nib formed on or
attached to it, and with a steady pin or lug, as and for the purpose specified.
4. The combination with a nut or set screw, having a spring detent fixed in a cavity
therein and of a notched or split washer adapted to engage with the spring detent and
with the work, as described.
J. E. LANSARD.
By A. M. & Wm. Clark,
53, Chancery Lane, London,
Patent Agents.