Improvements in Tools for Extracting Broken Wood-screws, Pianoforte Pegs, and the like.
Year: 1887

page_text: Date of Application, 20th June, 1887,
Complete Left, 20th Mar., 1888
Complete Accepted, 11th May, 1888
Improvements in Tools for Extracting Broken Wood-screws,
Pianoforte Pegs, and the like.
I HENRY THOMAS of 686 Holloway Road Upper Holloway in the county of
Middlesex Engineer do hereby declare the nature of this invention to be as
follows:-
My invention consists of a small tool by the use of which wood screws may be
withdrawn without damaging the hole, or wood work from which it is removed, broken
castor screws, and the like, when the head may have been faulty and forced off by the
screw driver or decayed by rust &c. Thus enabling a new one to be inserted in its
place with great facility without damage to the woodwork.
In carrying my invention into practice I employ a small steel rod at
one end of which formed in one piece is a socket of a slightly larger diameter.
On the inside of which is cut a left-hand thread the said socket is also
provided on its face with a series of sharp projections forming a circular cutter
which may be brought into action when required, that is to say, where a screw is
broken off flush with the wood, for the purpose of clearing a small space to allow the
thread on the inner side of the socket herein before described to catch the screw stem
it will be seen that the thread of the tool being opposite to that of the screw will
cause a jamb and commence to turn the same out.
Dated this 20th day of June 1887.

page_text: Pianoforte Pegs, and the like.
I HENRY THOMAS of 686 Holloway Road Upper Holloway in the county of
Middlesex, 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, reference being had to the accompanying drawing
forming a part of this specification :-
My invention relates to improvements in tools for the purpose of extracting screws
from wood-work, furniture &c. after their heads may have rusted or broken off under
the pressure of the screw-driver, it is also suitable for extracting piano-forte pegs
when broken off flush or below the surface of the wood, by the application of my
improved extractor, screws, pegs, and the like may be withdrawn without damaging
the article from which it is removed.
The said invention is illustrated in the accompanying drawing in which
Figure 1. is a longitudinal section of a tool constructed in accordance with my
invention and
Figure 2. is a side elevation of the same and
Figure 3 is a face view of same shewing teeth forming cutter.
In carrying my invention into practice I construct of suitably tempered steel a tool
as herein described and for the purposes specified. The extracting end of which,
being preferably of a conical form, on the inside of the said cone a is cut a left-hand-
thread which jambs on to the screw, or pin, to which it is applied and at this point
commences to turn the same out.-On the face of the cone a I cut a series of teeth c
for the purpose of cutting a clearance around screws or pins which may be broken
off below the surface of the wood.-The worm d allowing any cuttings to escape from
the cutters c.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is.―
In a tool such as is herein referred to the conical end a having the left-hand
thread band series of teeth or cutters c substantially as herein set forth and for the
purposes specified.