Improvements in Wood Screws.
Year: 1895

page_text: Date of Application, 8th May, 1895
Complete Specification Left, 10th Feb., 1896-Accepted, 4th Apr., 1896
Improvements in Wood Screws.
We, JOHN BELLINGHAM of Duncan Cottage, South End Road, Hampstead,
Merchant, and FREDERICK JAMES WHILLALL of 12, Eastcheap, London,
Commercial Traveller, do hereby declare the nature of this invention to be as
follows-
This invention relates to an improved construction of wood screws, and has for
its object to provide an arrangement by which the screw may be easily inserted in
wood or like imaterial without requiring a hole to be bored for its insertion.
The screw we propose to employ combines along with the ordinary throad a
gimlet or boring device which will piorco the wood or like material readily.
lu carrying out our invention, a screw of the ordinary form is employed, and a
groove is cut in it. This groove is of spinal form and extends from the point to
the upper end or head of the screw the spiral of the groove being of much greator
length than the pitch of the thread. The groove may extend one or more times
round the screw, the angle being about the same as that employed in gimlets, and
the most suitable one for cutting. The edge of the groove is sharp so that the
material is cut with case on pressing the screw in and turning it.
The groove may
extend along the outside of the screw to the head or upper extremity, or according to
a slightly modified arrangement a central hole may be formed through the upper
plain portion of the screw, opening into the upper end of the groove, which
terminates at the top of the thread.
With this sciew there will be no necessity for the use of a tool to prepare the
wood or like material, and the labour of inserting screws will thus be greatly
educed. To start the screw it can be gripped by the fingers and pressed into the
wood at the same time, sufficient grip being thus obtained to enable a sciew duiver
to be used. The groove will also increase the hold of the screw when inserted ns
the wood will press into the groove
The spiral groove will not weaken or lessen the stability of the sciew, as the
screw after being worked into the wood retains the sawdust or grains, thus filling
up the groove, the superfluous grains being free to pass away through the upper
ends of the groove or central passage above described
Dated thus 8th day of May 1895
GEO. II. RAYNER,
37, Chancery Lane, London, Agent for the Applicants.
Improvements in wood Sorews.
JOHN BELLINGHAM, of Duncan Cottage, South End Road, Hampstead, Merchant,
and FREDERICK JAMES WHITTALL, of 12, Eastcheap, London, Commercial
Traveller, 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.―
This invention relates to an improved construction of wood screws, and has for

page_text: its object to provide an arrangement by which the screw may be easily inserted in
wood or like material without requiring a hole to bo bored for its insertion
The scren we propose to employ combines along with the ordinary throad a
gimlet or boring device which will pierce the wood or like material readily
In carrying out our invention a screw of the ordinary form is employed, and a
groove is cut in it
This groove is of spal form and extends from the point to the
upper end or head of the screw, the spiral of the groove being of much quicker
pitch than that of the thread. The groove may extend one or more times Lound
the screw, the angle being about the same as that employed in gimlets, and the
most suitable one for cutting. The sharp edge of the groove is so shaped that the
material is cut with ease on pressing the screw in and turning it. The groove may
extend along the outside of the screw to the head or upper extremity or according
to a slightly modified arrangement an axial hole may be formed through the upper
plain portion of the screw, opening into the upper end of the groove, which
terminates at the top of the thread.
With this screw there will be no necessity for the use of a tool to prepare the
wood or like material, and the labour of inserting screws will be greatly reduced
To start the screw it can be gripped by the fingers and pressed into the wood at
the same time, sufficient grip being thus obtained to enable a screw driver to be
used. The groove will also increase the hold of the scren when inserted, as the
wood will press into the groove.
The shoulder or under part of the head of the screw may be formed with one
oi more cuts or grooves in the direction of the thread of the screw thus allowing
the head of the screw to countersink itself.
The spal groove will not weaken or lessen the stability of the screw, as the
screw after being worked into the wood or other material retains the sawdust or
grains, thus filling up the groove. the superfluous grains being free to pass away
through the upper ends of the groove or cential passage above described.
JOHN BELLINGHAM.
FJ MITTALL.