Year: 1887

page_text: Date of Application, 5th Mar., 1887.
Specification Accepted, 5th Apr, 1887.
I JAMES MACTEAR of No. 2 Victoria Mansions, Victoria Street, Westminster S. W.
in the County of Middlesex Chemical Expert and 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 :-
My Invention has for its objects the locking of nuts such for instance as are used
for securing the chairs to the sleepers and for fish plates of Railways so as to prevent
them from becoming loose from vibration or otherwise but can be used for the Locking
of Nuts generally.
With these objects in view I make a metal washer plate having at its ends two
holes or slots through which I pass the bolts.
In the centre of this washer plate I cut two vertical slots through which I pass
another metal plate hereinafter called the locking plate. The portion between these
slots is forced up to a slight extent and through the openings thus formed I pass
the said locking plate of such a length that when lying flat on the washer plate its
ends will bear against the nuts on the bolts and prevent them from turning. The
way in which I carry my Invention into effect is as follows. The locking plate
having been passed through the slots in the washer plate I turn the ends up
sufficiently to clear the nuts which 1 screw home in the usual way and then I hammer
the ends of the locking plate into the position required for securing the nuts i.e.
its ends or edges against the sides of the nuts.
Or I may cut the forced up part at its centre and turn the two laps thus formed
up to allow of the locking plate to fit into its position and then flatten them down
upon the locking plate.
Or I may cut out two or more pairs of flaps in the washer plate as shown in the
Drawing which accompanies this specification and flatten them down upon the locking
plate.
Or I may cut out of the washer plate in such a way so as to form flaps. These
flaps when the nuts are screwed home are turned over so as to enable them to
engage with the sides of the nuts and then hammered or flattened into their position.
This form is especially applicable to fish plates of Railways, as a corresponding

page_text: number of flaps can be cut out to the number of nuts required and can also be
cut to engage with hexagonal or other shaped nuts.
The edges of the parts engaging with the sides of the nuts can either be turned 'at
right angles to the washer plate or left plain.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a side elevation and Fig. 2 a section of my Invention applied to a fish
plate. The washer plate & Locking plates are both shown in position. a, a are the
nuts which are screwed home. e and e¹ the slots and d the raised
and its ends press
plate. The locking plate e is passed through these slots end up part of the washer
upon the nuts and when the nuts are screwed home I hammer the ends of the
locking plate e into position i.e. against the sides of the nuts. Fig. 2 shows the edges
turned at right angles.
Fig. 3 is a plan of a washer plate with pieces of metal cut out in such a way as
to form flaps which when turned over and hammered down engage with the sides
of the nuts and prevent them from turning. fare the spaces which are left by the
flaps being cut out of the washer plate b. The edges of these flaps 9 9 engage
with the sides of the nuts a, a and prevent them from turning. This form of a locking
plate is especially applicable to Fish plates as any number of flaps can be cut out
and of any shape according to the requisite number of nuts and shape requiring to be
locked.
Fig. 4 represents a plan of a washer plate with two pairs of flaps h, h, h, h cut out
which lap over the washer plate when in its position i.e. against the sides of the nuts
and are hammered down upon the locking plate e thus keeping it in its position.
Fig. 5 is a section taken on the line A. B. Fig. 4.
Having now particularly described and ascertained the nature of my said Invention
and in what manner the same is to be performed I declare that what I claim is :-
The use of the various parts in combination as hereinbefore described and
illustrated.