IMPROVEMENTS: IN THE MANUFACTURE OF WOOD SCREWS
Year: 1884

page_text: I ALFRED JULIUS BOULT of 323 High Holborn in the county of Middlesex,
Engineer, do hereby declare the nature, of the said Invention for "IMPROVEMENTS:
IN THE MANUFACTURE OF WOOD SCREWS "
to be as follows:
The object of this improvement is to prevent wood screws, or screw-bolts,
intended to be used in wood work of any kind from.splitting the wood, and at the
same time, causing them to bind firmly in the wood without possibility of their
working loose 'therein; and to this end I construct the stein or barrel of the screw,,
or bolt, as the case may be, with an annular collar or enlargement.
The head of the screw may have the usual nick, for the insertion of, the screw-
driver, or it may be made square hexagonal, or octagonal to adapt the screw-bolt-
to be used with a key or wrench. The stem or barrel is made smaller than usual
in screws having a thread and head of corresponding size, by this splitting of the
wood in driving home the screw or screw-bolt is prevented.
".
Near the head the stem or barrel, is enlarged to form a collar the lower end of
which is rounded or beveled where it imerges into the stem or barrel of the 'screw.*
This beveled enlargement or collar operates to keep the screw, or screw-bolt,
steady, and to hold it firmly in the wood when it is turned full into the same or
driven home so. that the improved screw, or screw-bolt will never split the wood;
yet, at the same time, it will bind as firmly and securely in the wood as when a
screw of much larger size is used, and by the use or which the wood into which it'
is driven would be apt to split.
I

page_text: I ALFRED JULIUS BOULT of 323 High Holborn in the county of Middlesex,
Engineer do hereby declare the nature of this invention for "IMPROVEMENTS IN
THE MANUFACTURE OF WOOD SCREWS," a communication from George Abner Stiles
of West Gardner Massachusetts, United States of America, and in what manner
the same is to be performed, to be particularly described and ascertained in
and by the following statement:-
The object of this improvement is to prevent wood screws, or screw bolts intended
to be used in wood-work of any kind, from splitting the wood, and at the same
time, causing them to bind firmly in the wood, without, possibility of their working
loose therein; and to this end the stem or barrel of the screw, or bolt, as the case
may be is constructed with an annular collar or enlargement more fully set forth.
Figure 1 is a side-elevation of three forms of the improved screws; Figure 2 is a
longitudinal sectional view of the same.
The letter A, denotes the head of the screw which may have the usual nick, B,
for the insertion of the screw-driver or it may be made square, hexagonal, or
octagonal to adapt the screw-bolt to be used with a key or wrench. C is the
stem or barrel, which is made smaller than usual in screws having a thread and
head of corresponding. size, by this splitting of the wood in driving home the
screw, or screw-bolt is prevented.
Near the head A the stem or barrel. C is enlarged to form a collar, D the lower.
end of which is rounded or bevelled where it merges into the stem or barrel of the
screw, as shown at E.
This beveled enlargement or collar D. E, operates to keep the screw, or screw
bolt, steady, and to hold it firmly in the wood when it is turned full into the same;
or driven home, so that the improved screw, or screw bolt, will never split the
wood, yet, at the same time, it will bind as firmly and securely in the wood as
when a screw of much larger size is used, and by the, use of which the wood into
which it is driven would be apt to split.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is
1st The method and means employed for preventing a wood-screw or screw-bolt
from splitting the wood into which it is driven, which consists in constructing the
barrel of the screw, or screw-bolt, smaller than the threaded part or screw below it;
substantially as and for the purpose shown and set forth.
2nd As a new article of manufacture, the wood screw, or screw-bolt having a
reduced stem or barrel provided with an annular enlargement or collar at its upper
end where it connects with the head; substantially as described and shown in the
drawing.
Dated this 17th low of Nonamban 1004