Improvement in Lock Nuts.
Year: 1887

page_text: Date of Application, 13th June, 1887.
Specification Accepted, 16th Aug., 1887.
[Communicated from abroad by WILLIAM AUGUST PUNGS, of Detroit, County of
Wayne, and State of Michigan, Inventor.]
Improvement in Lock Nuts.
I, WILLIAM PHILLIPS THOMPSON F.C.S. M.I.M.E. of the Agency for Foreign Patent
Solicitors 6, Lord Street Liverpool in the County of Lancaster and 323 High Holborn
in the County of Middlesex Civil 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:
-
The invention relates to an improvement in Lock-nuts and consists essentially of
the combinations of devices and appliances hereinafter described and more particularly
pointed out in the claims.
In the drawings Figure 1 is a sectional view of the invention before the nut is screw
tapped. Figure 2 is a similar view after the tapping is completed.
Figure 3 illustrates the invention as applied to a fish-joint. Figures 4 and 5
illustrate modifications.
A represents a nut provided an orifice a which may be bored therein before
the nut is screw tapped. Said orifice may communicate, preferably with the bore of
the nut, but may run parallel therewith and adjacent thereto as shown in Figure 4.
B is a metallic pin constructed to fit closely in said orifice, where the orifice
communicates with the interior of the bore, the adjacent face of the pin is flush with,
or substantially flush with the inner periphery of the nut. The pin may be thus
engaged in said orifice before the nut is screw tapped, as shown in Figure 1. The
outer end of the pin is projected to a suitable extent beyond the face of the nut, as
shown at b, a corresponding space being left in the inner end of the orifice so as to
permit the pin being subsequently forced inward, and its outer end brought flush with
the face of the nut when the nut is locked.
When the pin has been partially located in the orifice, as shown in Figure 1, the
nut is screw tapped and the adjacent face of the pin screw cut simultaneously
therewith. C is the bolt of ordinary construction. D is a fish plate. It will be
observed that the pin, when the orifice runs parallel to the bore of the nut projects
from the face side of the nut adjacent to the fish plate, and that consequently when
the nut is applied to the bolt, the projecting pin will be forced against the face of the
fish plate, and as the nut is further turned home upon the bolt, the pin will be driven
into its orifice, and its screw threads be thereby caused to impinge upon the external

page_text: faces of the screw threads upon the bolt, in such a manner as to effectually lock the
nut in place, as shown in Figure 3. The pin may be made of any suitable metal, as
of steel or brass. If of steel it will slightly upset the threads of the bolt and make the
removal of the nut all the more difficult. Still with a wrench no difficulty will be
experienced in effecting its removal. A soft metal pin, however, will ordinarily serve
every purpose to prevent any accidental or incidental disengagement of the nut, and
will do no damage to the threads of the bolt. The pin, as so applied is the equivalent
of a jam-nut without the necessity of employing an extra nut for that purpose.
No change in the construction of the bolt is required, and the nut may be provided
with the orifice without material expense.
Instead of constructing the orifice parallel to the bore of the nut it may be located
at an angle thereto as shown in Figure 5, in which case the pin may be caused to
impinge upon the threads of the bolt by the blow of a hammer.
This nut lock, although illustrated as applied to a fish joint, is intended for use
upon any bolt where it may he found desirable.
The pressure of the pin is in one direction as the nut is being applied, and in the
opposite direction when a contrary pressure is applied to the nut. Thus an effectual
resistance is offered in both directions.
Instead of the orifice communicating with the bore of the nut it may be located
adjacent thereto, leaving a thin portion of the nut between the pin and the bolt, in
which case the orifice and pin may be tapered, when as it will be evident, the pin,
without being screw cut, will force the intermediate portion of the nut inward, and
cause it to impinge upon the threads of the bolt, to hold the nut.
Having now particularly described and ascertained the nature of the said Invention,
and in what manner the same is to be performed, as communicated by my foreign
correspondent, I declare that what I claim is :
1st. A nut lock consisting of the combination with a bolt of a nut provided with an
orifice communicating with the bore of the nut, and a locking pin engaged in said
orifice, the bore of the nut and the adjacent face of the pin screw cut, substantially, as
and for the purpose described.
2nd. A nut lock consisting of a bolt having in combination therewith a nut provided
with an orifice adjacent to the bore of the nut, and parallel thereto, a movable locking
pin located in said orifice, the bore of the nut and the adjacent face of the pin scrow
cut, the construction being such that the pin may be forced inward and caused to
impinge upon the surface of the threads upon the bolt, substantially as described.
3rd. A nut lock consisting of a bolt having in combination therewith a nut provided
with an orifice adjacent to the bore of the nut, a movable locking pin partially located
in said orifice and projecting therefrom upon the inner face of the nut, the construction
being such that the pin will be forced into the orifice as the nut is screwed upon the
bolt, and the nut locked upon the surface of the threads upon the bolt, substantially as
described.
4th. The combination with a fish plate or analagous device of a bolt, a nut
constructed with an orifice parallel to the bore of the nut, a pin located in said orifice
and projecting from the face of the nut adjacent to the fish plate or analagous device,
the construction being such that when the nut is forced upon the nut, the projected
end of the pin will be brought into contact with the fish plate or other article and be
driven into the orifice, substantially as described.
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