Improvements in Nails.
Year: 1892

page_text: Date of Application, 23rd Mar., 1892
Complete Specification Left, 23rd Jan., 1893-Accepted, 25th Feb., 1893
PROVISIONAL SPECIFICATION.
Improvements in Nails.
I, HENRY JOHN CUBITT KEYMER of Marine Cottage, Gorleston in the
County of Norfolk, Engineer, also of Overgang, Brixham, in the County of
Devon, do hereby declare the nature of this invention to be as follows:-
My invention relates to the manufacture of nails, and has for its object a special.
means of saving much material now used in common practise amongst users, by
making the nail hold more firmly than heretofore although shorter.
According to my invention the point of the nail is at the termination of the
shank or body of the nail split or made with fangs or projections all being united
at the nail point but expanding outwards in the direction of the head of the nail.
In practise I find these nails hold more tenaciously than any others one third
longer.
H. J. C. KEYMER..
COMPLETE SPECIFICATION.
Improvements in Nails.
I, HENRY JOHN CUBITT KEYMER, of Marine Cottage, Gorleston, in the
County of Norfolk, 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 relates to nails and has for object to increase their tenacity or
holding power in the material into which they may be driven, whereby the nails may
be made shorter than hitherto, thus effecting an economy.
According to my invention the nail is formed with a pyramidal or tapering point,
the corners of the base of the pyramid or tapering end forming shoulders which
project outwards from the shank.
:-
In the accompanying drawing :-
Figure 1 is an elevation of a nail made according to my invention the tapering
point being of square pyramidal shape.
Figure 2 is a plan of the same.
Figures 3 and
are similar views to Figures 1 and 2 but shewing the tapering
point made wedge-shaped or chisel-edged.
Figure 5 is a view of the point end of the nail taken at a right angle to
Figure 3.
Figures 6 and 7 are also similar views to Figures 1 and 2 but shewing the
tapering point of triangular pyramidal shape.
Similar letters in all the figures indicate similar parts.
a is the shank of the nail which is preferably of round section like an ordinary
French nail but much shorter with relation to its thickness, and is the usual head
of the same.
c is the pyramidal or tapering point and d are the shoulders in which such
point terminates the said shoulders projecting as shewn from the sides of the
shank u.
With this construction when the nails are driven into wood for example the
tapering point c with its projecting shoulders d will cut a passage the size of which
in parts will not exceed the diameter of the shank a and the fibres of the material
which have been compressed by the passage of the nail will expand until the

page_text: material embraces the whole periphery of the shank. The shoulders d projecting
from the shank will then offer great resistance to the withdrawal of the nail
notwithstanding the comparative shortness of the latter. By making the nails so
much shorter than usual a considerable economy is obviously effected in the quantity
of material used in their manufacture.
Any suitable machinery may be employed for the manufacture of my improved
nails.
I am aware that it has before heen proposed to make nails with tapering points
terminating in a shoulder formed by cutting a recess in the shank; this plan
however I do not consider to be of much advantage inasmuch as not only is the
point of the nail much weakened but the space allowed for the expansion of the
wood or other material being limited to the recess in the shank the tenacity of
the nail is but slightly if at all, increased whereas in my nail there is no weakening
of the shank and the available space for the expansion of the wood extends from
the shoulder d to the head b of the nail.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A nail having a pyramidal or tapering point the corners of the base of the
pyramid or tapering end forming shoulders projecting outwards from the shank,
substantially as and for the purpose hereinbefore described.
2. The manufacture and use of the improved nails herein before described and
illustrated in the accompanying drawing.
Dated this 23rd day of January 1893
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.