Pointed Screw Nails.
Year: 1889

page_text: Date of Application, 30th Jan., 1889
Complete Specification Left, 8th Nov., 1889-Accepted, 14th Dec., 1889
PROVISIONAL SPECIFICATION.
Pointed Screw Nails.
ROBERT LIVESEY BAILES of 72 Herrington Street Sunderland Commission agent
and EDWARD WILLIAM CAMPBELL of 14 Aubrey Terrace Sunderland Clerk, County
of Durban, do hereby declare the nature of this invention to be as follows:-
To manufacture with every description of metal. Pointed nails of all sizes with a
worm so that on being driven by the hammer or other force they will turn round and
thus be as secure as the present screw.
Dated this 29th day of January 1889.
ROBERT LIVESEY BAILES.
EDWD. W. CAMPBELL.
COMPLETE SPECIFICATION.
Pointed Screw Nails.
ROBERT LIVESEY BAILES of 72 Herrington Street Sunderland Commission Agent
and EDWARD WILLIAM CAMPBELL of 14 Aubery Terrace Sunderland Clerk 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 consists in manufacturing with every description of metal, pointed
nails of all sizes with a worm, or screw, so that on being driven by, a hammer or by
pressure they will turn round and secure themselves similarly to the present screw.
Such pointed screw nails are constructed of all sizes, with one or more threads of
any convenient form. The thread, or threads, may stop at any distance from the
point or may be carried up to the head. The pointed screw nail may taper from the
head to the point or may be parallel part of the length and taper the remainder, or
may be without taper except at the point. The heads may be any convenient shape
suitable for driving or withdrawing or both.
The pointed screw nail has such an easy pitch of screw that on being driven by a
hammer or by pressure it revolves proportionately to the number of turns in the
screw, thus securing itself in the material, and it will not usually be necessary
to bore holes.
Fig. 1 shows a section through a pointed screw nail having one thread.
Figs. 2. 3. and 4 show sections having two, three, and four threads respectively.
Fig. 5 shows a form having two threads travelling up to the neck or head.
Fig. 6 shows a modification with the thread continued part of the length.
Fig. 7 shows a form tapering downwards to the point.
Fig. 8 shows an example having one thread extending the whole length of the
screw nail.
Fig. 9 shows a form suitable for fastening down Railway, or Tramway, chairs to
wooden sleepers, they will generally be constructed with square heads to enable them
to be withdrawn by means of a box key, or spanner.
Fig. 10 shows another variety for use with flat bottomed rails. This form will
asually have a square or oblong head which may project at any part or equally all
round to facilitato withdrawal by a spanner or box key &c.
Fig. 11 shows a form suitable for rivets for boots and shoes preferably made of
rass.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the saine is to be performed we declare that what we
claim is
1. An improved manufacture of pointed screw nails, of all sizes, in every description
of metal, with the pitch of screw of such an easy nature that on being driven with a
hammer, or by pressure they revolve according to the direction of the thread.
2. Constructing pointed screw nails of all sizes having one two three four or
more threads as in Figs. 1, 2, 3, & 4.
3. Constructing pointed screw nails of all sizes with the thread running from
the point to the head as in Fig. 5.
4. Constructing pointed screw nails of all sizes with the thread traversing part
of the length only as in Fig. 6.
5. Constructing pointed screw nails of all sizes having a taper from the neck
to the point as in Figs. 7 and 8.
6.-Constructing pointed screw nails having a taper part of the length only.
7.-Constructing pointed screw nails for use on Railways or tramways with
square or oblong heads for facilitating withdrawal by means of spanners or box ke
&c. as in Figs. 9 and 10.
8.-Constructing pointed screw nails of all sizos for use as rivets &c. in boot and
shoe making as in Fig. 11.
Dated this Thirtieth day of October 1889.
ימA
DATT S
ROBERT L. BAILES.
EDWD. W. CAMPBELL.