Improvements in Machinery or Apparatus for Deep, Boring.
Year: 1890

page_text: Date of Application, 1st Oct., 1890
Complete Specification Left, 26th June, 1891-Accepted, 1st Aug., 1891
PROVISIONAL SPECIFICATION.
Improvements in Machinery or Apparatus for Deep, Boring.
I THOMAS SHELDON COLEMAN of Union Street Burton on Trent in the County
of Stafford Mechanical Engineer do hereby declare the nature of this invention, to
be as follows:-
My invention consists of machinery or apparatus for deep boring the parts of
which are constructed and arranged in the manner hereinafter described; which
said machinery is used in the manner hereinafter described.
The cutting tool which I prefer to employ has a cutting edge of the configuration
of the letter S and is carried by a stem having a square or angular figure in cross
section. The upper end of the stem is turned at right angles. The stem of the
said tool capable of a limited vertical sliding motion in a holder fixed. at the
bottom of a tube which tube occupies the boring. The said tool while capable of
a limited vertical sliding motion in the holder is incapable of turning-therein the
part of the said holder in which the angular stem of the tool fits being of a corre-
sponding angular figure. The said tool can consequently only turn by the turning
of the tube at the bottom of which the holder is fixed. In order to operate the
tool a ram or driver working loosely in the tube is suspended from a cord or chain
by which cord or chain the ram is worked; that is the said ram is rapidly. raised
and allowed to fall so as to deliver a series of blows on the top of the stem of the
cutting tool. The tube in which the ram works is at the same time slowly. turned..
The vertical motion of the tool is limited by the lower part and the turned upper
end of the stem. By the action of the ram and tool the boring is rapidly deepened
the debris being washed up outside the tube in the space between the exterior of
the tube and the interior of the boring. The tubes employed have sockets at top
into which the unsocketed ends of the tubes added as the boring progresses are
screwed:
The holder by which the tool is carried has a movable part by the removal of
which part the tool can be taken out for resharpening or replacement and the
resharpened or replaced tool secured in the holder by the restoration and fixing of
the removable part.
The tool described may be employed in connection with machinery or apparatus
other than that described and the ram and appliances connected therewith may. be
used with tools of different kinds.
1000
W. T. WHITEMAN,
• Agent for the Applicant.
-
COMPLETE SPECIFICATION.
Improvements in Machinery or Apparatus for Deep Boring.
I THOMAS SHELDON COLEMAN of Union Street Burton-on-Trent in the County.
of Stafford Mechanical Engineer do hereby declare the nature of my invention and
in what manner the same is to be performed to be particularly described, and ascer-
tained in and by the following statement:-
My invention consists of machinery or apparatus for deep boring the parts of
which are constructed and arranged in the manner hereinafter described; which
said machinery is used in the manner hereinafter described.
The cutting tool which I prefer to employ has a cutting edge of the configuration
of the letter S and is carried by a stem having a square or angular figure in cross

page_text: section. The upper end of the stem is turned at right angles. The stem of the
said tool is capable of a limited vertical sliding motion in a holder fixed at the
bottom of a tube which tube occupies the boring. The said tool while capable of
a limited vertical sliding motion in the holder is incapable of turning therein the
part of the said holder in which the angular stem of the tool fits being of a corre-
sponding angular figure. The said tool can consequently only turn by the turning
of the tube at the bottom of which the holder is fixed. In order to operate the
tool a ram or driver working loosely in the tube is suspended from a cord or chain
by which cord or chain the ram is worked that is the said ram is rapidly raised
and allowed to fall so as to deliver a series of blows on the top of the stem of the
cutting tool. The tube in which the ram works is at the same time slowly turned.
The vertical motion of the tool is limited by the lower part and the turned upper
end of the stem. By the action of the ram and tool the boring is rapidly deepened
the debris being washed up outside the tube in the space between the exterior of
the tube and the interior of the boring. The tubes employed have sockets at top
into which the unsocketed ends of the tubes added as the boring progresses are
screwed.
The holder by which the tool is carried has a movable part by the removal of
which part the tool can be taken out for resharpening or replacement and the
resharpened or replaced tool secured in the holder by the restoration and fixing of
the removable part.
The tool described may be employed in connection with machinery or apparatus
other than that described and the ram and appliances connected therewith may be
used with tools of different kinds.
Figure 1 of the accompanying drawing represents in section a deep boring to
which my improved machinery or apparatus is applied the tube occupying the
boring and the cutting tool holder being represented in section;
Figure 2 represents partly in elevation and partly in vertical section the lower
part of the tube and the cutting tool and tool holder drawn to a larger scale ;
Figure 3 represents a plan of underside of the same;
Figures 4 and 5 represent horizontal sections of the same; the section Figure 4
being taken on the line A. B Figure 2 and the section Figure 5 on the line C. D
Figure 2.
The same letters of reference indicate the same parts in the several figures of
the drawing.
e is the tube situated in the boring g; h is the cutting tool the cutting edge of
which has the configuration of the letter S (see Figures 3. 4 and 5); ; is the stem
of the cutting tool having the oblong or angular figure represented the upper end
of the angular stem i being turned at right angles to form the stop and head k of
the tool.
The stem i is capable of a limited vertical sliding motion in a holder at the
bottom of the tube e occupying the boring g. The holder consists of two nearly
semi-tubular pieces marked respectively and the half being permanently fixed
by screws soldered in their places to the inside of the tube or rivetted or otherwise
fixed to the inside of the tube and the other half being capable of removal by
removing its fixing screws for the purpose of withdrawing the tool for resharpening
it. After the tool has been resharpened it is restored to its place in the tube and
the removable half of the holder replaced and fixed as represented.
It will be seen by an examination of the drawing that the angular stem i of the
cutting tool fits and works in the recess or opening at m between the halves of the
holder the said recess or opening having a corresponding figure to the said stem
so that while the cutting tool h is capable of a limited rising and falling motion in
its holder it can only turn by the turning of the tube e at the bottom of which the
holder is fixed. The vertical motion of the tool is limited by its expanded or
working part striking the bottom of the tube and the turned up top k bearing
against the top of the holder (see Figures 1 and 2). The tube e situated in the
boring is made in lengths each length of tubing having at top a socket n (see

page_text: Figure 1) into which sockets the tubes added as the boring progresses are
screwed.
The cutting tool h is operated by the ram or driver p (see Figure 1) working
loosely in the tube e the said ram or driver being supported from and worked by a
cord or chain q passing to the top of the boring.
In using the apparatus the ram or driver p is rapidly raised and allowed to fall
so as to deliver a series of blows on the top or head k of the cutting tool h the
tube e being at the same time turned so as to carry the cutting tool with it. By
this action of the ram and tool the boring is rapidly deepened the debris being
washed up outside the tube in the space between the exterior of the tube e and the
interior of the boring g as will be understood by an examination of Figure 1.
I do not limit myself to the S form represented of the cutting tool as the apparatus
may be used with tools of different kinds.
Having now particularly described and ascertained the nature of my inven-
tion and the manner in which the same is to be performed I declare that I
claim as my invention of "Improvements in machinery or apparatus for deep
boring
"
First-The combination with a tube occupying the boring of a cutting tool so
connected to a holder at the bottom of the tube that the said tool is capable of a
limited vertical motion in the said holder and can only turn by the turning of the
tube and holder for the purposes and substantially as hereinbefore described and
illustrated in the accompanying drawing.
Secondly-Operating the cutting tool at the bottom of the tube occupying the
boring by means of a ram or driver working loosely in the tube and suspended from
and being operated by a cord or chain passing to the top of the boring substantially
as hereinbefore described and illustrated in the accompanying drawing.
Dated the 26th day of June 1891.
W. T. WHITEMAN,
Agent for the Applicant.