Improvements in Nut Locks.
Year: 1890

page_text: Date of Application, 16th Aug., 1890-Accepted, 25th Oct., 1890
COMPLETE SPECIFICATION.
Improvements in Nut Locks.
I, CHARLES HALL THOMAS, of Bridge Street, City of Moncton, in the Province
of New Brunswick, in the Dominion of Cundi. Mechanic, do hereby declare tho
nature of my invention for IMPROVEMENTS IN NUT LOCKS 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 nut locks which screw on the bolts after the nuts are
in place.
The object of my invention is to secure and hold fast the nuts on bolts of any
size, placed in any position in any place work or structure where bolts with nuts
screwed thereon may be used and to so secure and hold the nuts that they may not
move or shake off but remain firmly in place.
I attain these objects by my invention illustrated in the accompanying drawings, in
which similar letters refer to similar parts throughout the several views.
Referring to the accompanying drawings-
Figure, 1. is a vertical section of the entire appliance or article.
Figure, 2. is a top view or plan of the invention.
Figure 3. shows a side elevation of the invention as applied to an ordinary railway
track, bolt partially screwed on.
Figure, 4. shows the side elevation of an ordinary fish plato attached to a rail at a
joint, with the locks placed in position, and screwed on the bolts after the nuts have
been put in place.
My invention is made of steel or any other metal or combination of metals that
will give sufficient tension spring and strength and of a width and thickness that
may be suitable for the size of the bolt and the work or structure on which the
bolt may be used.
It may be constructed by bending or folding a spring metal plate of the required
width and thickness upon itself, thus forming an angle with diverging planes 1 and 2
each provided with a circular aperture 3 and 4 respectively.
In the aperture 4 in plane 2 a thread is cut, the plane of the thread forming with
the plane 2 a slight angle of say four degrees or thereabout.
The aperture in plane 1 is formed without any thread therein and is of a size large
enough to clear the thread of the bolt.
The angle formed varies according to the pressure required upon the nut.
My invention is applied in use, by placing the plane 1 with aperture 3 which has
no thread
; on the inside and next to the nut and screwing the lock by means of
the thread in the aperture 4 up tight against the nut so as to press the planes 1 and 2
towards each other, and which may be brought in contact if required.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed 1 declare that what I
claim is-
-
1. In a nut lock, a spring metal plate bent upon itself to form diverging planes
V-shaped, each provided with a circular opening one of which is provided with a
thread which is made at a slight angle with the plane of the lock in which the thread

page_text: is made and which engages the bolt, the other plane having an opening of greater
diameter than that of the bolt, substantially as described.
T
1000
CHARLES HALL THOMAS.
Witness,
P. A. LONDRY,
Judge of the County Court of Westmorland,
Province of New Brunswick.
G. F. Redfern & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.