An Improved Nail, specially adapted for Fixing Corrugated Iron or other Corrugated Material.
Year: 1892

page_text: Date of Application, 22nd Feb., 1892-Accepted, 28th May, 1892
COMPLETE SPECIFICATION.
An Improved Nail, specially adapted for Fixing Corrugated Iron or
other Corrugated Material.
We JOSEPH JAMES MACKY Commission Agent and JOHN MITCHELL
Architect both of Auckland in the Provincial District of Auckland New Zealand do
hereby declare the nature of our invention for AN IMPROVED NAIL SPECIALLY
ADAPTED FOR FIXING CORRUGATED IRON OR OTHER CORRUGATED MATERIAL
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 to an improved combination of a shank and head together
forming an effective nail for the purpose of securing corrugated sheets.
The object of the invention is to provide a nail with a flexible head made of hard
metal and of such a nature that when driven it will adjust itself perfectly to the
corrugations or ridges of the material to be fixed reducing the risk of indenting or
bruising to a minimum.
Reference is to be had to the accompanying drawing which forms a part of this
Specification on which similar letters of reference indicate the corresponding detail..
Figure 1 represents a section Figure 2 an elevation and Figure 3 a plan.
Our invention consists of one or more concavo convex embossed dises or washers
in combination with the shank and head of ordinary nails of suitable pattern.
The disc A of any desired shape or pattern stamped out of flexible metal such.
as iron or steel scalloped or ornamental, octagonal, square or round; having an.
embossed dome in the centre as shown on Figure 1.
The disc or washer B. is for the purpose of giving additional strength to the
centre of the dome of the flexible disc or washer A thereby preventing injury to.
the same by the act of driving or by the action of the corrugated material in
expanding or contracting under the influence of heat or cold.
The method of combining the several parts will now be described. The discs
having been stamped with a perforation in the centre; the shank of the nail is to.
be passed through them; the flexible one A on top and the disc B below both
being driven tightly home on a mandril, and by attrition adhering closely to the
shank of the nail. This combination is now to be galvanized, or dipped in tin,
solder, or other suitable cementing material thus forming a solid combination
headed nail.
This nail is far superior to the nail and washer, or the lead headed nail in
ordinary use for the purpose named; because the galvanized disc A being stiffened
in the embossed dome by the washer or disc B. the flexible flange will when the
nail is driven adjust itself to the ridges or corrugations and will by oxidation
hermetically seal itself to the iron and thereby prevent any possibility of leakage
or of the combination head being forced off by the expansion of the iron as so.
frequently occurs with the lead washer or with the lead headed nail.
Having now described our invention and in what manner the same is to be
performed we would have it understood that we do not confine ourselves to any
size shape or pattern for our combination headed nail; but what we claim is that
which we are now about to state and is that for which we desire to secure Letters
Patent for the United Kingdom of Great Britain.
1st. One or more concavo convex hard metal embossed washers or discs in
combination with a nail of suitable pattern forming an elastic or flexible head for
the purpose of fixing any kind of corrugated material substantially as described.
2nd. A nail of suitable pattern having a head formed by the combination of one
or more concavo convex hard metal embossed and perforated discs or washers.

page_text: cemented each to each and to each other by soldering, dipping, tinning, galvanizing
or other process substantially as described.
Dated the 25th day of April One thousand eight hundred and ninety-one.
Witness,
JOHN M. ALEXANDER,
Solicitor, Auckland.
JOSEPH J. MACKY.
JOHN MITCHELL.