Improvements in Nut Locks or Devices for Securing Screw Nuts and the like.
Year: 1890

page_text: Date of Application, 12th May, 1890
Complete Specification Left, 9th Feb., 1891-Accepted, 14th Mar., 1891
PROVISIONAL SPECIFICATION.
Improvements in Nut Locks or Devices for Securing Screw Nuts
and the like.
I, STEPHEN ALLEY, of Sentinel Works, Polmadie, in the County of Renfrew,
North Britain, Engineer, do hereby declare the nature of this invention to be as
follows, that is to say :-
My said invention has for its object to construct nut locks or devices for securing
screw nuts and the like in an improved manner, and so as whilst suitable for various
applications to be specially advantageous when applied to moving parts or parts
subjected to vibration. My improved device is distinguished from many which
have been tried or proposed for the same purpose by the fact that it comprises no
loose or separate parts liable to become detached or to be mislaid and not available
when required.
My device is applicable to an ordinary screw bolt and nut, or in connection with
a screwed spindle, rod, or tube, on which a nut or other internally screwed piece is
adjustable for fixing or holding parts together or for determining their adjustment
in relation to each other or to other parts.
In a simple modification applicable, for example, to the bolt and nut for
securing the bearing cap at the crank-pin end of a steam-engine connecting rod,
the locking bit is a latch or tongue permanently jointed within a slot formed for
it in the bolt, and the nut is made with a number of notches, slots, or indentations
around its outer part. When the mut is being put on the bolt end the latch lies
in a longitudinal position; and when the nut has been screwed as far as required
the latch is turned out across and so as to engage in one of the notches, slots, or
indentations, in the nut.
The latch is held in the locking position by a small strong spring completely
enclosed in a socket in the bolt, and arranged to act on a squared or flattened part
formed on the inner end of the latch.
In some cases, as for example when the bolt, spindle, rod, or tube is large.
there may be two diametrically opposite latches.
Dated this Tenth day of May 1890.
COMPLETE SPECIFICATION.
Improvements in Nut Locks or Devices for Securing Screw Nuts
and the like.
I, STEPHEN ALLEY, of Sentinel Works, Polmadie, in the County of Renfrew,.
North Britain, 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, that is to say :--
My said invention has for its object to construct nut locks or devices for securing
screw nuts and the like in an improved manner, and so as, whilst suitable for
various applications, to be specially advantageous when applied to moving parts or
parts subjected to vibration. My improved device is distinguished from many
which have been tried or proposed for the same purpose by the fact that it
comprises no loose or separate parts liable to become detached or to be mislaid
and not available when required.

page_text: My device is applicable to an ordinary screw bolt and nut, or in connection
with a screwed spindle, rod, or tube, on which a nut or other internally screwed
piece is adjustable for fixing or holding parts together or for determining their
adjustment in relation to each other or to other parts.
And in order that my said invention and the manner of performing the same
may be properly understood I hereunto append a sheet of explanatory drawings
to be hereinafter referred to and showing two simple modifications of my improved
nut lock.
Figure, 1, on the accompanying sheet of drawings is an elevation showing the
locking device as in the position occupied when a mut is being put on a bolt.
Figures 2 and 3, are, respectively a plan and an elevation showing the device
as in its locking position and
Figure 4, is a vertical section.
Figures 5 and 6, are a plan and a vertical section of a second modification.
In these drawings the same reference letters are used to mark the same or like
parts wherever they are repeated.
In the simple modification shown in Figures 1 to 4, of the drawings and
applicable, for example, to the bolt, and nut for securing the bearing cap at the
crank-pin end of a steam-engine connecting rod, the locking bit is a latch or
tongue, L, permanently jointed by means of a pin, P, within a slot formed for
it in the bolt, B, and the nut, N, is made with a number of notches, slots or
indentations, I, around its outer part. When the nut, N, is being put on the
bolt end, B, the latch, L, lies in a longitudinal position as shown in Figure 1,
and when the nut, N, has been screwed as far as required the latch, L, is turned
out across and so as to engage in one of the notches, slots or indentations, I, in
the nut, N, as shown in Figures 2, 3 and 4, of the drawings.
The latch, L, is held in the locking position by a small strong spring, S,
completely enclosed in a socket in the bolt, B, and arranged to act, through a
pin, C, on a squared or flattened part formed on the inner end of the latch, L.
In some cases, as for example when the bolt, spindle, rod, or tube is large there
may be two diametrically opposite latches, L, as shown in Figures, 5, and 6, of
the drawings in which figures the latches, L, are shown as in their locking
position.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. The combination and arrangement of parts constituting my improved nut
lock or device for securing screw nuts and the like substantially as hereinbefore
described and shown in Figures 1 to 4, of the accompanying drawings.
2. The combination and arrangement of parts constituting my improved nut
lock or device for securing screw nuts and the like substantially as hereinbefore
described and shown in Figures 5 and 6 of the accompanying drawings.
3. As a nut lock or device for securing screw nuts and the like, the combination
of one or more latches or tongues jointed to the bolt, rod, or tube, and notches,
slots, or indentations formed in the outer part of the nut substantially as
hereinbefore described.
Dated this Seventh day of February 1891
EDMUND HUNT,
Applicant's Agent.