Year: 1887

page_text: Date of Application, 19th Sept., 1887
Complete Left, 15th June, 1838
Complete Accepted, 20th July, 1838
We GEORGE ABRAHAM GOODWIN, and WILLIAM FIELD HOW, both of 2, Victoria
Mansions in the City of Westminster, Engineers do hereby declare the nature of this
invention to be as follows:-
The invention relates to nuts that maintain their position on the bolt or like
fastening on which they are screwed except when intentionally slackened or screwed
back.
The object is to make such nuts of a single piece of metal in a more simple and
inexpensive manner than heretofore.
Under the first part, we make a nut with one or more clip lugs or projections ou
the top face, such lugs being traversed by a continuation of a portion of the screwed.
hole of the nut, and having a thread formed thereon of a different pitch or diameter,
or both, to that in the screwed hole; in addition to the variation of the thread, the
clip lugs may be bent or pressed in.
Under the second part-we form nuts with clip lugs in the required position by
rolling, forging, or casting and the hole is formed and tapped in any usual manner, the
lugs being separately tapped.
Dated this Sixteenth day of September 1887.

page_text: We GEORGE ABRAHAM GOODWIN and WILLIAM FIELD How both of 2 Victoria
Mansions in the city of Westminster Engineers, 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 that maintain their position on the bolt or like
fastening on which they are screwed except when intentionally slackened or screwed
back.
The object is to make such nuts of a single piece of metal in a more simple and
inexpensive manner than heretofore.
+
Under the first part, we make a nut with one or more clip lugs or projections on the
top face, such lugs being traversed by a continuation of a portion of the screwed hole
of the nut, and having a thread formed thereon of a different pitch or diameter, or
both, to that in.the screwed hole; in addition to the variation of the thread the clip
lugs may be bent or pressed in or they may be pressed in only.
Under the second part, we form nuts with clip lugs in the required position by
forging that is to say by rolling or stamping suitably shaped bars with one or more
projections or recesses along them from which the nuts are cut off and when so cut off
the projections form the clip lugs the hole is formed and tapped in any usual manner
or the lugs may be separately tapped. If the nuts are made of a cast metal, the lugs
can be cast with the body.
Fig. 1 is a plan, fig. an elevation, and fig. 3 a section of a nut under our invention.
a body of nut, 6 lugs, c screw thread through body of nut, d screw thread on the inner
faces of the lugs the screw thread d is of different pitch to the screw thread c so that
when the nut is screwed home the thread in the lug portion will tightly grip the
thread on the bolt. The pitch of d may be greater or less than that of c; in the drawing
it is shown greater.
Fig. 4 is a section of a nut under our invention in which the diameter of the
thread d on the inner faces of the lugs is less than the diameter of the thread c through
the main body of the nut. The threads c and d have in this view the same pitclies
but the pitch of d may be greater or less than that of c if desired.
It will be obvious that the position and shape of the lugs may be varied and that
there may be more than two lugs on a nut or that only one lug or more than two lugs
may be used.
Fig. 5 is a sectional view shewing one apparatus for enabling a nut to be satisfactorily
made with threads of two different pitches under our invention. The body of the nut
is tapped in the usual manner, a piece e threaded externally to fit the body of the nut
and having an internal thread of the required difference of. pitch is then screwed into
the nut until a flange f on the said piece closes with the face of the nut. A tap g of the
required pitch and having an extension of the same pitch adapted to fit the internal
thread of the piece e is then used to tap the inner faces of the lugs. The extension h

page_text: first enters the piece e and guides the cutting edges of the tap y so that the threads in
the main body of the nut and in the lugs form a continuation one of the other.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that what
we claim is.
First. Nuts with one or more clips or projections having a thread formed thereon
substantially as set forth.