AN IMPROVED ADJUST- to be as follows:- ABLE BORING TOOL FOR METALS AND OTHER MATERIALS
Year: 1886

page_text: Date of Application, 3rd May, 1883.
Complete Left, 26th Feb., 1887.
Complete Accepted, 29th Mar., 1887.
I, THOMAS RICHARD SHILLITO of 89 Chancery Lane, in the County of Middlesex,
Engineer, do hereby declare the nature of said invention for "AN IMPROVED ADJUST-
to be as follows:-
ABLE BORING TOOL FOR METALS AND OTHER MATERIALS
"
:-
The boring tool of this invention is designed to render unnecessary the use of a
separate drill for a varying diameter of bores. It consists of two cutting pieces which
are mounted in a slot formed in a square metal bar or boring rod so as to be capable
of adjustment inwards and outwards to diminish or increase the radius of the outer
cutting edges of the said cutting pieces. The adjustment is effected by turning a dise
or pin which is fitted to the boring bar. Underneath, the disc or pin is provided with
two small studs which engage each in a groove formed in each of the cutting pieces.
When the disc or pin is turned it carries with it the two small studs and these latter
in their turn operate the travel of the cutting pieces nearer together or farther away
from each other according to the diameter it is desired to Lore. After adjustment in
this way the cutting pieces are firmly fixed in position by means of keys which pass
through the boring bar and bear against them.
This boring tool may be used in lathe or drilling machines.

page_text: An Improved Adjustable Boring Tool for Metals and other
Materials.
I, THOMAS RICHARD SHILLITO of 89 Chancery Lane in the County of Middlesex,
Engineer, do hereby declare the nature of said invention for "AN IMPROVED ADJUST-
ABLE BORING TOOL FOR METALS AND OTHER MATERIALS a communication to me from
abroad by Johann Uhle of Aachen, in the German Empire, Machinist, and in what
manner the same is to be performed to be particularly described and ascertained in and
by the following statement:-
The boring tool of this invention is designed to render unnecessary the use of a
separate drill for varying diameters of bores. I consists of two cutting pieces which
are mounted in a slot formed in a square metal bar or boring rod so as to be capable
of adjustment inwards and outwards to diminish or increase the radius of the outer
cutting edges of the said cutting pieces.
Referring to the accompanging drawing:
Fig. 1 is a front view. Fig. 2 a side view. Fig. 3 a plan. Figs. 4 and 5 hori-
zontal sections through line A B of Fig. 1. Figs. 6 and 7 detail views of the cutting
pieces.
In a slot formed in a square bar a are mounted two cutting pieces b, which may
be adjusted inwards and outwards by turning a disc or pin which is fitted to the
boring bar . Underneath, the disc or pin d´is provided with two small projecting
pins or studs c., which engage each in a groovey formed in each of the cutting
pieces b,, so that when dis turned it carries with it the two small pins or studs e,
and thereupon the two cutting pieces are either drawn or forced inwards or outwards
according to the diameter it is desired to hore. After adjustment in this way the
cutting pieces are firmly fixed in the desired position by means of keys A
protecting cover prevents the water used in the boring operation from penetrating
into the tool. For the purpose of giving the cutting pieces a good bearing the boring
bar a may be made wider at the corresponding part. Figs. 4 and 5 shew the cutting
pieces b, respectively in the closest inward and nearly farthest outward positions.
This boring tool is adapted for use in lathes or drilling machines.
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 :
A horing tool having two emiting pices, which by turning a disc or pin
provided with projections may be adjusted, and by means of keys, secured, for
boring different diameters of hore, substantially as described and shewn.
Dated this 26th day of February 1886.