Improvements in and relating to Deep Boring Apparatus.
Year: 1895

page_text: Date of Application, 22nd July, 1895-Accepted, 31st Aug., 1895
COMPLETE SPECIFICATION.
Improvements in and relating to Deep Boring Apparatus.
I, JEAN FRANÇOIS LAUTRE of 12 Rue Blanchard-Latour Bordeaux in the
Republic of France, 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:-
This invention consists in improvements in boring apparatus which may be used
for instance for the sinking of Artesian wells or the like purposes, and for bringing
up to the surface and discharging the powdered or broken rock or earth of whatever
its nature that is cut or ground off by the cutter at the end of the boring shaft.
In the annexed drawings Figs. and 2 are elevational sections at right angles
to each other through the axis of the boring shaft and its supporting frame and
gearing.
The apparatus comprises a lower frame consisting of the metal plate A¹ and four
hollow or other columns A supporting an upper frame consisting of the plate B the
four columns A2 and the plate C. The plate B carries the bearings D of the
shafts E on which are the pulleys J' and the bevelled gear wheels F engaging with
the wheel F2. The arches G G on plate B carry the parallel guide bars J
supported rigidly by the bars I from the columns A². The bevelled wheel or
ring F rolls on balls K under it engaging in a circular groove in the plate B.
The plate C carries a plate L in which is a circular groove for the balls M
supporting the fly wheel or fly nut N engaging with the screw threaded spindle O.
This fly wheel may be moved by hand or by gearing from shaft E for the purpose
of raising or lowering the spindle O.
A hollow colun:n narrowed at its lower end, has at R two windows or opening
through which the chain therein may be unlinked after it has been secured
immediately below at S by means of a pin passed through the said holes S in the
column T or its extension pieces so as to engage with the links of the chain.
lower end of column Q is screw threaded to receive the hollow cylinder T or any
of the extending cylinders by which it may be indefinitely lengthened.
The
At the middle of the screw threaded part at the lower end of column Q, and
at a corresponding place of column T and of each of its extensions, is a hole for
passage of a locking bolt U which will also serve as a guide to the chain and in
case of breakage allow of the lower parts of the boring shaft being drawn out of
the ground by means of the chain.
Two windows W similar to those in the column Q, are also provided at the
lower end of the column T or of each extension thereof for the same purpose as the
windows R. The boring head X is fitted in the lower end of the column T by
means similar to those used to secure the columu T to column Q.
It will be understood that as each section of the column disappears in the ground
during the action of the borer, the upper column Q is unscrewed and another
section or extension of the column T is inserted and secured, the chain being also
extended by insertion of another length or lengths. To preveut the chain from
twisting when the upper column has to be unscrewed, there are in the head of the
supporting screw O, within the cylinder cap Y, two grooves B' serving as a housing
for two articulated bars which when extended serve to laterally hold the drum C
by means of pins which pass through these supporting bars and the said drum.
order to insert and withdraw these pins, windows or openings are made in the
column cap Y just above the shaft of the drum C'.
In

page_text: The boring head X has helicoidal ribs, for instance eight in number and is in its
general form of an ogival nature. These ribs are fitted with black diamonds so
arranged that in a turn of the head there is no plane left untouched. The detritus
is swept into the interior of the head through orifices of which there may be four
between the ribs on the helicoidal or ogival part and four in the neck at the upper
part of the head. Within the head is fitted a shaft on which the pulley revolves
around which the chain turns. Above the neck of the head, on the lower side of
the collar which is just above the said neck, are hinged fingers D' armed with
diamonds and supported by springs for the purpose of enlarging the bore sufficiently
-for-insertion of the lining tubes. The hinging of these fingers permits of the
subsequent withdrawal of the head if it is desired to change or repair it.
The tube E simply follows the downward movement of the other parts and
consists also of sections fitted thereto at the same time as the sections of the boring
shaft. The sections of tube E' may be fixed together by countersunk screws
engaging with a sleeve previously rivetted in the end of the previous section.
Rotary movement is given to the bore shaft consisting of columns Q. T through
the gear F F from shafts E, the wheel F2 being connected to the column Q by
means of a groove and feather. Rotary movement is given to the pulley C¹ and
thus to the endless chain within the bore shaft, through the bevelled gear G¹ L'
and pinion I from the interiorly toothed crown wheel or ring H¹ which, during the
movement of the hore shaft is held from revolving therewith by its guides J but
rises and falls with the bore shaft, that is to say with the column Q. Between
the head of screw O and its bearing in cap Y are balls F¹ for minimizing the
friction.
On the chain at suitable intervals are pockets for dredging up the detritus in the
boring head X and throwing it out through the chute N' communicating with a
passage way in the thickness of the wall of column Q at the lower end thereof.
Roller guides O¹ to the number of four in each tubular section of the bore shaft
prevent friction of the chain or its buckets with the wall of the hollow bore shaft.
Having now particularly described and ascertained the nature of this said inven-
tion and in what manuer the same is to be performed I declare that what I
claim is ;-
1. The construction of boring apparatus with means for removing the detritus
consisting of a bucket chain within the hollow sectional shaft thereof substantially
as set forth.
2. The construction of the individual parts of the apparatus as illustrated with
reference to the description thereof.
:
HERBERT HADDAN & Co.,
18 Buckingham Street, Strand, London, W.C., Agents to Applicant.