Improvement in Screw-nails.
Year: 1888

page_text: Date of Application, 17th Dec., 1888
Complete Specification Left, 17th Sept.. 1889-Accepted, 19th Oct., 1889
PROVISIONAL SPECIFICATION.
Improvement in Screw-nails.
We, HARTLEY ILLINGWORTH, of Junction House, Shipley, in the County of York,
Bankers Clerk, and SAMUEL PEEL RUSHWORTH, of 68, Briggate, Shipley aforesaid
Plumber, do hereby declare the nature of this invention to be as follows:-
This invention has for its object the construction of screws which when held in a
vertical position and knocked on the head by a hammer, they can be driven into wood
ly such means; and when so driven. the screw turns in the wood much in the same
way as if screwed in by a screw driver in the ordinary manner.
In order to accomplish our object, we form on cach nail, screw threads, the
number of threads varying according to the thickness of the nail; on small screws
one throad being sufficient. provided the thread is so formed as to ensure that the
largest surface of the thread is towards the top, or head of the screw.
Screws constructed as above described with threads of a quicker pitch than those
of ordinary scrows when driven into wood turn therein so that a screw driver is
required to remove the same when it is found necessary to unscrew one from the
wood.
Dated this 14th day of Drama 1000
JOHN WAUGH,
Agent.
COMPLETE SPECIFICATION.
Improvement in Screw Nails.
We, HARTLEY ILLINGWORTH, of Junction House, Shipley, in the County of York,
Banker's Clerk, and SAMUEL PEEL RUSHWORTH, of 68 Briggate, Shipley, aforesaid,
Plumber, 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 stateinent :-
This invention has for its object the construction of screws which when held in
the usual position and knocked on the head by a hammer or the like, can be driven
into wood by such means, and when so driven the screw turns in the wood somewhat
in the same way as if "driven" in by a screw-driver in the ordinary manner.
In order to accomplish our object, we form on each nail, screw threads, the number
of threads varying according to the thickness of the screw nail; on small screws
one thread being sufficient, provided the thread is so formed as to ensure that the
largest surface of the thread is towards the top or head of the screw.
In order that our invention may be more fully understood, we will further describe
the same by making reference to the accompanying drawings, in which
Fig. 1. represents a view of a four threaded screw constructed according to our
improvement.
Fig. 2. is a cross section, and
Fig. 3. is a view of a single threaded screw.
In carrying out our improvement we form on each nail A. one or a series of screw
thrands Bins of a aninke- nitch than those of ordinary the anmhar

page_text: By forming screw nails with threads cut as described they can be driven into wood
without the aid of a screw driver, the nails rotating as they are being driven in, so
that whenever it may be found necessary to remove a screw, it cannot be withdrawn
from the wood without the application of a screw-driver; thus by these means the use
of screw nails is greatly facilitated and the material into which they are driven more
securely held together than when plain or unthreaded nails are used.
Having now particularly described and ascertained the nature of our invention
and in what manner the same may be performed, we declare that what we
claim is―
Screws having a conical or circular head with a groove cut therein the threads
being undercut so as to present a large resisting area, constructed substantially in
the manner as shown and described.
Dated this 16th day of September 1889
JOHN WAUGH,
Agent.