AN EXPANDING BORING AND FINISHING TOOL FOR LATHES to be as IMPROVED follows
Year: 1884

page_text: We HENRY HORNER of 99 Russell Street in the town of Lougborough Engine
Fitter and Turner and WILLIAM ADCOCK also of 99 Russell Street in the same
place Engine Turner do hereby declare the nature of an invention for AN
EXPANDING BORING AND FINISHING TOOL FOR LATHES
to be as
IMPROVED
follows:-
Self adjusting boring bit or finishing tool to be used in connection with a lathe
or drilling machine to consist of the following parts that is to say 1. A flat piece
or bar of steel of any requiring length with sliding cutters projecting from either
sides at or near the end thereof 2 the said cutters to be expanded or contracted
by means of a compound or double or novelty wedge to be inserted in the centre
of and to slide in the centre of the said piece or bar of steel now known as a
finishing tool 3 the said wedge to be adjusted and worked by the action of a
screw also inserted in the centre of the said bar of steel such screw being controlled
from the outside by a key thereto 4 the said bar cutters wedge and screw to be
covered by adjustable plates and blocks of wood capable of adjustment to the
circumference of the holes required to be perfected or finished.
W. T. PAGE, Jr.,
Agent for the Applicants.

page_text: COMPLETE SPECIFICATION.
We HENRY HORNER of 99 Russell Street in the Town of Loughborough Engine
Fitter and Turner and WILLIAM ADCOCK also of 99 Russell Street in the same
place Engine Turner do hereby declare the nature of an invention for AŃ
IMPROVED EXPANDING BORING & FINISHING TOOL FOR LATHES & DRILLING
MACHINES and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
It is necessary in the first place to state that the common finishing bit or tool
now in use is a solid flat bar of cast steel turned & filed to a cutting edge at one
end or at the sides at or near the end then hardened & ground to standard size
with woods or broaching bits screwed on at each side. After finishing about
20 holes the cutting edges of this common bit or tool wears too small and has
then to go through a process of softening haminering larger turning hardening
& grinding & new woods which not only deteriorates the quality and temper of the
metal but also exposes it by reason of defects in the hardening & grinding process
to the risk of again going over the same process. By the tool proposed to be
patented the patentoes, claim that among other great advantages this hazardous
process will be obviated and that the tool or bit will finish over 7,000 holes. The
improved tool is composed of the following parts-A flat bar of bessemer steel
No 1 16 in: long by 1.%, x shown on the plan or drawing hereunto annexed and
signed by us and at or near the end of such bar cast steel cutters Nos 2 & 3 are
inserted in a slide and projects from each side of such bar at an angle of 70 degrees―
The cutters are capable of expansion by means of a double or novelty wedge N 4
which is fitted into a groove cut in the middle of the said bar and is itself worked
by a screw and wheel the said wheel to be turned by a small lever which fits five
slots in the wheel also inserted in the middle of the said bar at a distance of about
4 inches from the end that enters the hole required to be finished The adjustable
plates 5 & 6 of steel with woods are 4 inches long × 11 which overlapping at
the end of the bar are secured when in required position by a / screw which is
screwed into the end of the bar itself. These plates of steel are also secured at a
distance of about 4 inches from the end by screws which fasten them to the bar of
steel itself in four different places. Over these plates of steel are secured blocks of
wood which give greater stability to the whole bit or tool The plates of steel are
capable of expansion to standard size by means of an independent fork wedge
No 7 which slides on the end of the bar. If it is desired the bit or tool can be
used independently of the plates or wood and in that case the cutters project at
an angle of 45' from the bar of steel.
Having now particularly described and ascertained the nature of our said
Invention, and in what manner the same is to be performed, we declare that what
we claim is
1. Boring holes in iron or steel by means of the tool herein described instead
of the one now in use.

page_text: 2. An improvement in boring bits or tools by the use of a double or novelty
wedge which regulates the draw of and expands the cutters herein before
described.
3. An improvement in boring bits or tools inasmuch as the plates of steel
are secured and kept in positions by the woods hereinbefore described.
4. Expansion of the woods and plates by means of the independent fork
wedge.