An Improved Combined Plate and Nut for Railway and other Purposes.
Year: 1890

page_text: Date of Application, 21st Oct., 1890-Accepted, 6th Dec., 1890
COMPLETE
SPECIFICATION.
An Improved Combined Plate and Nut for Railway and other
Purposes.
We, THOMAS BARRETT, of Adelaide in the Province of South Australia, Bolt
and Nut Maker, and EDMUND ALFRED COPP, also of Adelaide aforesaid, Agent, do
hereby declare that the nature of our invention for "AN IMPROVED COMBINED PLATE
AND NUTF OR RAILWAY AND OTHER PURPOSES" and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:
Our invention relates more particularly to the fishplates or joints used for connecting
the ends of rails in the permanent way of railways or tramways, but is applicable
also to other similar purposes where a screw threaded bolt and loose nut are used in
conjunction with a plate and especially where it is of importance that the said bolts
should be prevented from becoming loose or unserewed by vibration or other cause.
The special feature of our invention consists in the construction of a plate which
combines a plate and nut in one piece, that is to say, the plate is rolled or other-
wise manufactured with a projecting piece or boss, which answers the purpose of a
nut, a hole being afterwards punched through both, and provided throughout with
an internal screw thread.
In carrying out our invention we prefer making the screw-threaded hole through
the plate and projecting piece or boss with tapering sides, and provide the projecting
piece or boss with one or two transverse slots or saw gates cut almost to the face of
the plate so as to allow its radial expansion.
The special construction of our invention permits of the cheeks or divided parts of
the projecting piece or boss having a much firmer grip of the bolt than is obtained
by any loose nut at present in use, and renders it practically impossible for the bolt
to work loose.
In order that our invention may be the better understood we will now proceed to
describe the same by reference to the accompanying drawings, in which
Fig. I is a side elevation of a shallow fishplate to which our invention is applied.
Fig. II an end elevation of the same.
Fig. III an end sectional elevation of the same.
Similar letters refer to similar parts in all figures.
A is a fishplate or other plate. B projecting piece or boss preferably circular.
B¹ transverse cut or saw-gate. B2 taper hole having an internal screw thread.
The boss B may be provided with one or two transverse cuts or saw-gates B', and
these should preferably be cut as deep as possible, without entering the face of the
plate A. We wish it to be understood that we do not claim the transverse cuts or saw-
gates B as our invention, nor do we claim the tapering of the screw-threaded
hole B², but
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :--
An improved combined plate and nut. consisting of a plate provided with a

page_text: and provided throughout with a screw threaded hole preferably tapering, substantially
as herein described and for the purpose indicated.
Dated this Fifteenth day of September 1890.