Improvements in Screw Nuts.
Year: 1894

page_text: Date of Application, 19th Nov., 1894
Complete Specification Left, 1st Jan., 1895-Accepted, 2nd Feb., 1395
PROVISIONAL SPECIFICATION.
Improvements in Screw Nuts.
I, JOHN LEWIS WILES, of 30 Barden Road, Tonbridge, in the County of
Kent, Manufacturer, do hereby declare the nature of this invention to be as
follows:--
The invention has for its object improvements in screw nuts, and relates more
particularly to those of small size, with a view to afford a better grip for a spanner
as compared with ordinary nuts, and the diminution of injury by the spanner to the
faces of the nuts, at the same time making them of sufficient strength.
For this purpose I form the nut with three long faces and three short faces at
the junctions of the long faces, that is to say, the nut is of a generally triangular
form but has the angles formed by the faces of the nut cut off a short distance so
as to form three short faces at such parts.
In order to give a nut of this shape a suitable bearing surface and thereby
prevent it from cutting into and thus disfiguring or injuring the surface against
which it is screwed, I form on the underside of said nut a circular bearing
surface, which, in addition to affording the above named protection, also adds
to the strength of the nut.
Dated this 19th day of November 1894.
JOHN L. WILES,
By Harris & Mills,
23, Southampton Buildings, London, W.C., Agents.
I, JOHN LEWIS WILES, of 30 Barden Road, Tonbridge, in the County of
Kent, Manufacturer, 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 has for its object improvements in screw nuts and relates more
particularly to those of small size, with a view to afford a better grip for a spanner
as compared with ordinary nuts and the diminution of injury by the spanner to
the faces of the nuts, at the same time making them of sufficient strength.
The invention is illustrated in the accompanying drawings, in which :-
Fig. 1 is a plan of a nut constructed according to my invention.
Figs. 2 and 3 are elevations of the same in different positions, and
Fig. 4 shows a nut with a spanner applied thereto.
For this purpose I form the nut with three long faces a and three short faces a¹
at the junctions of the long faces, that is to say, the nut is of a generally triangular
form but has the angles formed by the faces of the nut cut off a short distance,
so as to form three short faces a' at such parts.
In order to give a nut of this shape a suitable bearing surface and thereby
prevent it from cutting into and thus disfiguring or injuring the surface against

page_text: which it is screwed, I form on the underside of said nut a circular bearing surface b,
which, in addition to affording the above named protection, also adds to the
strength of the nut.
When using an ordinary adjustable spanner with parallel faces, one of the jaws
fits against a long face of the nut and the other jaw fits against the opposite short
face as shown in Fig. 4. It will also be seen that the spanner may be placed
upon the nut in six different positions in exactly the same manner as with a
hexagon headed nut.
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 :
1. A nut having a triangular form and being strengthened by a circular bearing
surface, substantially as herein shown and described.
2. A nut formed with three long faces a and three short faces a³ and an enlarged
circular bearing surface b, substantially as herein shown and described and for the
purpose stated.
Dated this 1st day of January 1895.
HARRIS & MILLS,
23, Southampton Buildings, London, W.C., Agents.