Improvements in Locking Nuts on Screw Bolts.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in Locking Nuts on Screw Bolts.
ROBERT TURNBULL of 14 Beaconsfield Street Newcastle upon Tyne, Naval
Architect, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in locking nuts on screw bolts, and to
provide a simple and reliable locking between nuts and bolts, by a key being driven.
in between the nuts.
On the end of the screw bolt I make a saw cut to a little below the depth of
the second nut..
.
The first nut is screwed on in the ordinary way, tight against the iron work
which is to be secured.
The second nut, has a cut or cuts across the back or that part going against the
first nut; this is screwed on by hand, until it touches the first nut.
If the cut in the nut coincides with the saw cut in the bolt, the key is driven
in between the nuts. If the cut in the nut and the cut in the bolt do not coincide,
the second nut is turned back until they are fair; then the key is driven in. This
locks both bolt and nuts together securely and reliable.
This is especially adapted for uniting fish plates used on railways, bolts on marine
or land engines, vehicle axles or in fact wherever vibration, or tremor in structures.
is felt.
Dated this 19th day of September 1895.
ROBERT TURNDULL.
Improvements in Locking Nuts on Screw Bolts.
ROBERT TURNBULL 14 Beaconsfield Street Newcastle upon Tyne Naval Architect,.
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 improvements in locking nuts on screw bolts, and to
provide a simple and reliable locking between nuts and bolts by a key being driven in
between the nuts.
On the end of the screw bolt I make a saw cut to a little below the depth of the
second nut.
The first nut is screwed on in the ordinary way, tight against the iron work which
is to be secured.
The second nut has a cut or cuts across the back or that part going against the first
nut; this is screwed on by hand, until it touches the first nut.
If the cut in the nut coincides with the saw cut in the bolt, the key is driven in
between the nuts. If the cut in the nut and the cut in the bolt do not coincide, the
second nut is turned back until they are fair; then the key is driven in. This locks.
both bolt and nuts together securely and reliable.
This is especially adapted for uniting fish plates used on railways, bolts on marine,.
or land engines, vehicle axles, or in fact wherever vibration, or tremor in structures.
is felt.

page_text: Keterring to the drawings
Figure 1 is a longitudinal view of bolt and nuts in a locked position.
Fig. 2 is an end view of bolt nuts and key.
Fig. 3 is a plan of bolt showing saw cut.
Fig. 4 is a plan of lock nut showing saw cut in the back.
Fig. 5 is an end view of the first nut presumed to have become slack through wear,
and again screwed up tight. The key driven a little further in securely relocks it,
proving that the first nut is locked on any part of the circle it stops at.
A is the bolt.
5
ROBERT TURNBULL.