Year: 1888

page_text: I, GEORGE H. GRIFFIN of Abingdon in the County of Washington and State of
Virginia, United States of America, Gentleman, .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 :-
My invention relates to an improvement in nut locks, and washers for the same and
the object and nature of the invention will be more fully set forth hereinafter and
particularly pointed out in the claims.
Referring to the drawings;
Figure 1, is a side view of a rail showing my improved nut 'lock in operative
position with a bolt and nut.
Figure 2 is a view of a bolt, partially in section and a nut and locking washer on
the same, and in section.
Figures 3 and 4, are perspective views of two different forms of washers.
Figure 5 is a plan of a blank from which the washer shown in figure 3 is bent,
and
Figure 6 is a face view of a die that can be used to form the blank.
In the drawings the reference letter a, indicatès a bolt having a longitudinal
groove b, through its screw threaded portion; c, is a nut to screw upon the bolt,
and on its outer face is provided with the radially extending slots or grooves d,
(figure 1) which are beveled on one side in a corresponding direction.'
The locking washer shown in figure 3, consists of a body portion e, provided with a
central aperture for the admission of the bolt, and an upwardly extending locking
tongue, formed integral with the body and of greater length than the thickness of
the nut. This washer is preferably stamped integral from a piece of spring metal by
the die shown in figure 6, having in its forming face a groove to form the body of the
washer in the desired shape (in the present case circular) and a straight groove
extending from one side of the body forming groove transversely, across the face of
the die through space between and beyond the opposite ends of the body forming
groove which extend within a short distance of each other and are separated from the
transverse groove by narrow bridges as shown. It will thus be seen that the body
forming slot will form the body e, of the blank shown in figure 3, having a central

page_text: opening and the free ends gg, located opposite each other, and the cross slot will
form the locking tongue f, of the blank extending from the inner edge of one side
of the body transversely across the central opening of the same-and between and
beyond the free ends g g. In order to prepare the washer for use the locking
tongue is bent upwardly into a plane at or about right angles from the plane of the
body as shown in figure 3.
The free ends gg, of the washer are preferably formed to spring in opposite
directions.
The washer shown in figure 4, is bent from a straight bar of metal, the bar being
first bent to form the circular body portion e, of the washer, and then the surplus end
of the bar is bent inwardly as shown at h, opposite the free end of the body, and then
upwardly at right angles to form the locking tongue f.
In assembling the parts of the lock, the washer is slipped upon the threaded end of
the bolt with its locking tongue.extending outwardly and resting in the groove of the
bolt, which groove is of such depth, that the outer side of the tongue, will lie beneath
the edges of the groove, and the nut is then screwed tightly down upon the washer,
and the end of the tongue is bent over into one of the slots in the outer face of. the
nut (see figure 1) thus forming an exceedingly tight and rigid lock that can not be
jarred or forced loose.
The invention is not limited to any peculiar method of forming the locking washers
as they can be bent, stamped, cast, or otherwise formed, as found most desirable,
and it is also evident that slight changes might be made in the form and arrange
ment of the parts described without departing from the spirit and scope of my
invention.
What I claim is ;
1st. The combination with a bolt provided with a longitudinal groove in its threaded
portion, and a nut to fit said bolt, of a washer provided with a locking tongue, and
formed of a single piece of metal, its locking tongue extending across the bore and
periphery of the washer; the free ends being bent to form springs and the tongue
being adapted to rest in the groove of the bolt and its outer end bent to fit in notches
in the outside face of the nut, substantially as described.
2nd. The herein described blank consisting of a body. portion provided with free
ends and a tongue formed integral with the body and extending across the central
opening of the same, substantially as described.
•
3rd. The herein described blank consisting of a body portion provided with free
ends, and a tongue formed integral with and extending from the inner edge of the
body portion across its central opening and between and beyond the free ends, as set
forth.
4th. A nut locking washer consisting of a single bar of metal bent into circular
shape to form the body portion of the washer with free ends, one of said ends being
bent inwardly and then upwardly to form the locking tongue extending at right angles
from the plane of the body, substantially as described.
5th. The combination of a bolt provided with a longitudinal groove in its threaded
portion, a nut, and a nut locking washer consisting of a single bar of metal-bent into
circular shape to embrace the bolt beneath the nut and having one of its free ends
extending upwardly through the groove in the bolt and bent down upon the outer
face of the nut and firmly lock the same-to the bolt, substantially as described.
Dated this 11th day of December 1888.