LOCKING NUTS ON BOLTS AND SCREWS
Year: 1886

page_text: Date of Application, 13th Aug., 1886.
Complete Left, 16th Mar., 1887.
Complete Accepted, 19th Apr., 1887.
.
ABRAHAM BARRACLOUGH 120 Hartington Road South Lambeth London, S.W.,
Engineer, do hereby declare the nature of my invention for LOCKING NUTS ON BOLTS
AND SCREWS, to be as follows:
The aforesaid invention consists of a simple thin Annular Washer, made of Steel or
other suitable.material, with a hole in the centre to suit the different sized Bolts, or
screws.
The rim of said Washer to hold on its inner surface two or more small tooth shaped
projections. The said teeth projecting towards the centre and turned downwards at
an angle permitting the Bolt or screw to pass through.
The manner in which the aforesaid invention is to be applied is as follows
The Apparatus or Washer with teeth projecting inwards and downwards, is placed
over the Bolt, or screw, and against the top of the Nut, then by a sharp blow on the
upper surface of the Washer, the Washer is forced hard down on to the Nut, and the
teeth or projections are forced into the thread of Bolt or screw, thereby securing a
perfect lock on the Nut.
I claim for my invention,
1st. A Washer Nut Lock carrying or having teeth projecting on the inner surface.
2nd. I claim a Washer Nut Lock operating from the outside of a Bolt or Nut, held
in position by teeth holding in the thread of Bolt or screw.
Dated this Twelfth day of August 1886.

page_text: ABRAHAM BARRACLOUGH, 120 Hartington Road, South Lambeth, London, S.W.,
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:—
My Invention consists of a simple thin annular Washer, made of steel or other
suitable material, with a hole in its centre to suit the different sized Bolts or screws.
The rim of said Washer to hold on its inner surface, two or more small tooth shaped
projections, the said teeth projecting towards the centre, and turned downwards at an
angle permitting the Bolt or screw to pass through.
The manner in which the aforesaid Invention is to be applied is substantially
described in the accompanying drawings.
Fig. 1. is a plan of Nut Lock, a, with its four projecting teeth b, b, b, b.
Fig. 2. is a section through centre of Fig. 1.
Fig. 3. shows a Bolt c, and Nut e, with Nut Lock a, in position ready to be applied,
with its teeth b, b, b, b, projecting downwards.
Fig. 4. is same as Fig. 3, except, that it shows an elevation of the Nut Lock a when
applied.
Fig. 5 is a view of Fig. 4, showing in plan the Nut Lock when applied.
The manner of applying the Nut Lock is as follows. The Apparatus or Washer a
with its teeth projecting inwards and downwards is placed over the Bolt c, down on
the top of the Nut e, as shown in Fig. 3 then by a sharp blow on the upper surface of
the Washer, the Washer is forced hard down on to the Nute, and the teeth b, b, b, b,
are forced into the thread of Bolt c, as shown in Figs. 4, and 5, thereby securing a
perfect Lock on the Nut e.
Having now particularly described and ascertained the nature of my said Invention,
and in what manner the same is to be performed, I declare that what I claim is,
1st. A Washer Nut Lock, carrying or having teeth projecting on its inner surface.
2nd. I claim a Washer Nut Lock operating from the outside of a Bolt and Nut,
held in position by teeth holding into the thread of Bolt or screw, substantially as
specified.
Dated this Sixteenth day of March 1887.