Year: 1887

page_text: Date of Application, 1st Feb., 1887.
Specification Accepted, 1st Mar.. 1887.
I JUSTIN HERBERT BURDICK, residing at Utica, in the County of Dane and State
of Wisconsin, one of the 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 :-
The invention relates to nuts and consists in certain peculiarities of construction
whereby the same are adapted to always remain firmly in place upon the ends of bolts
without the use of any extra or jam nuts and without the danger of becoming
loosened by vibration or jarring of the said bolts.
In the drawings,
Fig. 1, is an end elevation of one form of the invention.
Fig. 2, is a similar view of the same upon a bolt.
Fig. 3, is an end elevation of another form in place upon a bolt and
Fig. 4, is a side elevation and
Figs. 5 and 6, are the two end elevations of still another form of the device.
The improved nut is preferably made of a steel band or band of other clastic
material, the two ends of which are brought together but not welded or joined, thus
leaving a slit between the said ends which slit may be either straight, inclined or
irregular. It will be understood however that the device may be made in a variety
of ways, it only being essential that the described slit or opening exists as stated so
that the adjacent edges of the nut may separate at the required time as hereinafter
explained.
In carrying out the invention the nuts may be made in either one of several ways.
First, the entire nut may be tapped, free for the bolt, and then one end may be
somewhat flattened, so as to render the bore elliptical at said end or the whole nut
may be thus flattened, rendering the entire bore elliptical, the object being in either
case to make the nut fit the bolt so tightly that the nut must open slightly in going
on, thereby by reason of its spring or elasticity, causing it to grasp the bolt firmly
nd enabling it to adapt itself to slightly varying sizes of bolts and still fit tightly.
The nut may also be tapped free and only a ring on the rear portion of the nut
artially separated from the rest of the nut by a deep groove (as shown by Fig. 4) left
[Price Gd.]

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grasp the bolt, as stated, this said ring portion being similarly somewhat flattened
to render its bore elliptical, so as to grasp the bolt tightly as described, and be firmly
held in place yet without danger of springing the bolt.
In the several forms of the device illustrated, A, represents the forward end of the
improved nut, and, A', the rear end. B, is the bolt.
The first three figures illustrate the simplest form of the device, and either the
rear end or the whole nut may be somewhat flattened on opposite sides causing the
bore to become elliptical as clearly indicated by the full and dotted lines, respectively,
in Fig. 6, or one side only of the nut may be somewhat flattened or driven inward
(either at the rear end or throughout the entire nut) as shown in Fig. 1. The
exterior of the nut may be either round as shown in Figs. 1, and, 2, or polygonal as
in Fig. 3. In Fig. 4, there is shown a groove, a, separating the front and rear ends
of the nut, the latter being made thinner than the front end and reduced to a mere
ring, as such construction will aid the said rear end in springing or separating.
Fig. 6, shows the rear end or ring of the form shown in Fig. 4, flattened or
rendered elliptical and Fig. 5 simply illustrates the front end of the form shown in
Fig. 4, without any flattening or inward driving.
If desired in any instance, the forward ends of the nuts might even be tapped a
little larger than the general diameter of the bore to enable the nuts to readily catch
the thread of the bolts.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed, I declare that what I claim is ;
A nut of steel or analogous elastic material formed with a longitudinal slit from one
end to the other and with one or more sides of the nut somewhat flattened or driven
inward, whereby the nut in its normal condition has a bore at a variance from a true
circle at the point or points where such flattening occurs.