An Improved Nut-lock.
Year: 1889

page_text: Date of Application, 28th Dec., 1889
Complete Specification Left, 27th Sept., 1890-Accepted, 1st Nov., 1890
PROVISIONAL SPECIFICATION.
An Improved Nut-lock.
I WILLIAM WILSON HORN, of 151 Strand Middlesex, Patent Agent, (a communi-
cation to me from abroad by Jeremiah G. Leep of Red House Shoals, West Virginia,
United States of America, Inventor,) do hereby declare the nature of this invention to
be as follows
11
This my invention relates to a new and improved nut-lock, and it consists preferably
of a square nut having a V-shaped recess in one of its sides or faces. Adjacent to this
recess, and with but a thin partition between them is another recess, in which is
pivoted a dog or pawl, made with a bevelled end which comes against the partition
aforesaid. By the insertion of a chisel or other similar tool," into the aforesaid
V-shaped recess, the thin partition may be bent outwards against the dog, so as to
retain the point thereof tightly against the bolt.
Dated thin 97th dow of Thomas 1000
HORN & SON,
Applicant's Agents.
COMPLETE
SPECIFICATION.
An Improved Nut-lock.
I, WILLIAM WILSON HORN, of the firm of Horn & Son, of 151 Strand London
Middlesex, Patent Agent, do hereby declare the nature of this invention, (a communi-
cation to me from abroad by Jeremiah G. Leep of Red House Shoals, West Virginia,
United States of America, Inventor,) and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement :-
My invention is an improvement in that class of nut-locks in which a dog is pivoted
to the nut and its pointed free end held engaged with the thread of the screw-bolt by
contact with a flexible portion of the nut, which is bent or forced inward against it.
In carrying out my invention I construct the nut with a V-shaped recess alongside
the larger one in which the dog is pivoted, the wall or partition which separates them
being made as thin as practicable, so that it may be readily set inward against the dog
by means of a suitable tool inserted in said V-shaped recess.
Referring to the accompanying drawings,
Figure 1 is a side view of the nut removed from the bolt, taken from the outer
side of the nut.
Fig. 2 is a perspective side view showing the nut on the bolt, and the chisel
introduced to form the notch or recess.
Fig. 3 is a perspective side view showing the nut locked on the bolt.
Fig. 4 is a perspective side view of the nut with the dog removed, and
Fig. 5 is a detail view of the small chisel I prefer to employ.
The same letters of reference indicate corresponding parts in all the figures.
Referring to the several parts by letter, my invention relates to that class of nut-
locks in which the nut is locked on the bolt by a dog on the nut locking in a notch or
recess in the bolt.
A indicates an ordinary bolt formed with the usual screw-thread, and B indicates a
nut the central opening of which is formed with a screw-thread. This nut B has two
recesses cut or pressed in its outer face or side. The largest recess C is of the shape
shown, running from the central opening of the nut to one corner thereof and to the
edges on each side of said corner. A pivot-pin D is left standing near this corner,
being formed integral with the nut. The smaller recess E is cut or pressed just to the
left of the main recess C, leaving a thin wall F between the two recesses, which is
just over the outer shoulder and end of the ratchet G when the latter is in position
Price 67

page_text: The dog G is formed near its outer end with a circular opening g, through which
the pivot-pin D passes, and the outer edges of the ratchet are straight to conform with
the edges of the nut, so that the dog does not project to interfere with a wrench placed
on the nut to screw it on the bolt. The inner end of the pawl or dog curves in, so
that its sharp point is a little beyond the central line of the threaded nut-aperture.
In operation, the nut being screwed moderately tight on the bolt, a small chisel,
as H is slipped under the dog, as shown in Fig. 2, with its inner end touching the
bolt, when a single blow with a hammer will cause the chisel to form a longitudinal
notch or recess I in the bolt. I prefer to use the small chisel shown in Fig. 5, having
the point h. and wide edge h' at its operative end, as shown, the point / forming the
recess I on a bolt. The recess I being thus formed, the nut turned slightly,
tightening it still further, until the point of the dog drops in the recess I in the bolt.
The wide edge of the chisel is then driven in the small wedged-shaped recess E, forcing
the thin partition or wall F over against the beveled or inclined free end of the dog
and firmly locking its point in the recess I of the bolt, securely hold ng the nut at the
tightest point to which it has been forced or turned.
To unlock the nut, the chisel is first driven between the dg and the wall
to raise the former and then under the dog to raise its point out of the recess I,
when the nut can be removed, or screwed on tighter to take up wear, and again
locked, as before. The end of the pivot is enlarged by blows to hold the dog on it.
The nut can be firmly locked on a bolt without using the chisel to form any recess
in the bolt itself, by knocking down the thin wall or partition F to force the point of
the ratchet G into engagement with the bolt, the dog being so formed and arranged
that, when the partition F is knocked down against it, its sharp point will be pressed
into the bolt.
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
The nut having the V-shaped recess E, the recess C, and the thin flexible inter-
vening wall or partition F, and the dog G, pivoted in said recess (and arranged
with its free beveled end adjacent to said partition, whereby the latter may be forced
against the dog to hold it engaged with the bolt, as shown and described.
Dated this 27th day of September 1890.
HORN & SON,
Agents for the Applicant.