IMPROVE- MENTS IN DRILLING MACHINERY
Year: 1872

page_text: LETTERS PATENT to Edward Le Gros, of Stoke, Newington, in the
County of Middlesex, Gentleman, for the Invention of "IMPROVE-
MENTS IN DRILLING MACHINERY."-A communication from abroad by
PROVISIONAL SPECIFICATION left by the said Edward Le. Gros at
the Office of the Commissioners of Patents, with his Petition, on
the 3rd July 1872.
I, EDWARD LE GROS, of Stoke Newington, in the County of Mid-
dlesex, Gentleman, do hereby declare the nature of the said Invention
for IMPROVEMENTS IN DRILLING MACHINERY," a communication to me from
abroad by William D'Silva, of New York, United States of America, to
be as follows:-
The improvements relate to rock or other drilling machinery intended
to be worked direct by steam or compressed air, and consist in giving a.
rotary motion to a piston and conveying said motion to a fixed or move-
·

page_text: able drill by means of a spiral rod fixed within or attached to the said
piston, furnished with a suitable nut or other adjustment so that when
desired the piston may work direct in one direction and in the other
rotate.
Also in arranging the feed by means of tappets or other suitable
means that the piston may be forced back slightly before the point of
the drill or bit attached to it strikes the rock or material to be bored,
and thus form a cushion and prevent the piston from striking the end
of the cylinder, and so that the shocks or resistance the drill or bit
meets with may be received only on the drill and bit and not be com-
municated to the other parts of the machinery.
Also supporting the above, and the improved machinery generally on
adjustable tripod legs so that the machinery can be placed and work
in almost any position.
The accompanying Drawings will serve further to describe the nature 1
of the Invention and how the same may conveniently be carried into
effect.
Figure 1 is a side elevation; Figure 2, a front elevation; Figure 4,
sectional elevation; Figure 5, sectional plan; Figure 6, perspective view;
Figure 3, part plan.
2
A is the frame; B, legs; C, screws or nuts for adjustment; K, the
drill or bit; D, clamp for holding weights; E, the cylinder; I, the
piston; T, nut forming part of the device for turning the drill; S, spiral
rod; U, ratch; F, steam or air chest; B", B", glands; G, valve stem;
H, tappet levers; J, clamps for fastening drill to piston; L, trunnions 2
on which frame A rests; M, throttle; N, hose for admittance of motive
power; O, exhaust; P, feed screw; Q, crank by which feed screw P is
turned; R, feed shaft; V, V, pawls; Y, pawl; X, arm of pawl Y..

page_text: WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Third day of July, in the year of our
Lord One thousand eight hundred and seventy-two, in the thirty-sixth
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said Edward Le Gros, Her special licence that I,
the said Edward Le Gros, my executors, administrators, and assigns,
or such others as I, the said Edward Le Gros, my executors, admi-
nistrators, and assigns, should at any time agree with, and no others,
from time to time and at all times thereafter during the term therein
expressed, should and lawfully might make, use, exercise, and vend,
within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN DRILLING
MACHINERY," a communication to me from abroad by William D'Silva,
of New York, United States of America, upon the condition (amongst
others) that I, the said Edward Le Gros, my executors or administrators,
by an instrument in writing under my, or their, or one of their hands
and seals, should particularly describe and ascertain the nature of the
said Invention, and in what manner the same was to be performed, and
cause the same to be filed in the Great Seal Patent Office within six
calendar months next and immediately after the date of the said Letters

page_text: :
L
with may be received only on the drill and bit, and not be communi-
cated to the other parts of the machinery.
Also supporting the above and the improved machinery generally on
adjustable tripod legs so that the machinery can be placed and work in
almost any position.
The accompanying Drawings will serve further to describe the nature
of the Invention and how the same may conveniently be carried into
effect.
Figure 1 is a side elevation; Figure 2, a front elevation; Figure 4,
sectional clevation; Figure 5, sectional plan; Figure 6, perspective view.;
Figure 3, part plan.
A is the frame; B, legs; C, screws or nuts for adjustment; K, the
drill or bit; D, clamp for holding weights; E, the cylinder; I, the
piston; T, nut forming part of the device for turning the drill; S, spiral
rod; U, ratch; F, steam or air chest; B", B", glands; G, valve stem;
H, tappet levers; J, clamps for fastening drill to piston; L, trunnions
on which frame A rests; M, throttle; N, hose for admittance of motive
power; O, exhaust; P, feed screw; Q, crank by which feed screw P
is turned; R, feed shaft; V, V, pawls; Y, pawl; X, arm of pawl Y.
In witness whereof I, the said Edward Le Gros, have hereunto
•
set my hand and seal, this Thirtieth day of December, in the
year of our Lord One thousand eight hundred and seventy-two.

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWARD LE
GROS, late of Stoke Newington, in the County of Middlesex, but now
of Queen Victoria Street, in the City of London, Gentleman, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria by Her Royal
Letters Patent, bearing date the Third day of July, One thousand eight
hundred and seventy-two, No. 2008, did, for Herself, Her heirs, and
successors, give and grant unto me, the said Edward Le Gros, my
executors, administrators, and assigns, Her special licence, that I, the
said Edward Le Gros, my executors, administrators, and assigns, or
such others, as I, the said Edward Le Gros, my executors, administrators,
or assigns, should at any time agree with and no others, from time to
time and at all times thereafter during the term therein expressed,

page_text: .
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands,
and the Isle of Man, an Invention of "IMPROVEMENTS IN DRILLING
MACHINERY," a communication to me, the said Edward Le Gros, from
abroad, by William D'Silva, of New York, United States, America,
upon the condition (amongst others) that I, the said Edward Le Gros,
by an instrument in writing, under my hand and seal, should par-
ticularly describe and ascertain the nature of the said Invention, and in
what manner the same was to be performed, and cause the same to be
filed in the Great Seal Patent Office within six calendar months next
and immediately after the date of the said Letters. Patent.:
C
And whereas I, the said Edward Le Gros, by an instrument in
writing under my hand and seal, did declare the nature of the said
Invention and in what manner the same was to be performed, and
caused the same to be filed in the Great Seal Patent Office on the
Thirty-first day of December One thousand eight hundred and seventy-
two:
And whereas since the filing of the said Complete Specification by
me, the said Edward Le Gros, I have ascertained that so much of the
said Specification as describes the. giving a. rotary motion to the piston
was old at the date of the Letters Patent granted to me as aforesaid, and
I am therefore desirous of disclaiming that part of my said Specification,
and am also desirous of limiting the other improvements in the said
Specification described and illustrated by the Drawings theretò annexed,
herein-after particularly
as
set forth in-the-Amended-Specification-hereunto-annexed.
NOW KNOW YE, that I, the said Edward Le Gros, by and with
the
leave of Her Majesty's Solicitor-General, and for the reasons aforesaid,
do. disclaim and alter parts, of the description of the said Invention as
contained in the said Complete Specification in the manner fol-
lowing: :-
I strike out the words "in giving," which occur in line 27 of page 3
of the Queen's Printers' copy of the said Specification published in One.
thousand, eight hundred and seventy-two, and the words commencing
"a, rotary, motion," and the following words, down to and including the
words "other, rotate," which occur in lines 28, 29, 30, 31, and 32 of

page_text: page 3 of the Queen's Printers' copy, and I also strike out the word
"also," which occurs in line 33 of page 3 of the said Queen's Printers'
copy, and also the words "or other suitable," which occur in the said
line 33, and the following words, down to and including the word
slightly," which occur in line 34 of page 3 of the said Queen's Printers'
copy, and I substitute therefor the words, letters, and figures "placed
inside the cylinder proper, and operating as shewn in the accompanying
Drawings, and marked H, H', H", Figure 4, so that," and I also strike
out the words "and thus form," which occur in line 36 of page 3 of the
said Queen's Printers' copy, and also the word "and," which occurs in
the said line 36 of page 3 of the said Queen's Printers' copy, and
substitute therefor the words "is formed so as to," and I also strike out
the word "adjustable," which occurs in line 4 of page 4 of the said
Queen's Printers' copy, and introduce between the word "legs" and
the word "so," which occur in the said line 4, the words and letter
"connected with quadrants arranged and acting as shewn in the accom-
panying Drawings, and marked B," and I also introduce the word
"can" between the word "and," and the word "work," which occur
in the said line 4 of page 4 of the said Queen's Printers' copy, and I
also add after the word "position," which occurs in line 5 of page 4 of
the said Queen's Printer's copy, the words "No claim is made to the
telescopic extension of the legs as forming any part of this Invention;"
and I also introduce between the letter "G" and the word "valve,"
which occur in line 15 of page 4 of the said Queen's Printer's copy, the
words and figures "in Figures 1 and 2;" and I also strike out the word
"stem" which occurs in the said line 15 and substitute therefor the
word "stems;" and I also introduce between the letter "H" and the
word "tappet," which occur in line 16 of page 4 of the said Queen's
Printer's copy, the letters, words, and figures "H', H", Figure 4,
inside;" and I also strike out the letter ✗, which occurs in line 19 of
page 4 of the said Queen's Printer's copy, and substitute therefor the
letter "."
And in order that the effect of the said Disclaimer and Memorandum
of Alteration may be better understood I annex hereunto a copy of the
said Specification as it will appear when so altered and amended, the
Provisional Specification and the preamble and testing clause of
the Complete Specification being omitted.

page_text: The improvements relate to rock or other drilling machinery intended
to be worked direct by steam or compressed air, and consist in arranging
the feed by means of tappets placed inside the cylinder proper, and
operating as shewn in the accompanying Drawings, and marked
'H, H¹, H", Figure 4, so that before the point of the drill or bit attached
to it strikes the rock or material to be bored, a cushion is formed so as
to prevent the piston from striking the end of the cylinder, and so that
the shocks or resistance the drill or bit meets with may be received only
on the drill and bit, and not be communicated to the other parts of the
machinery. Also supporting the above and the improved machinery
generally on tripod legs connected with quadrants, arranged and acting
as shewn in the accompanying Drawings and marked B, so that the
machinery can be placed and can work in almost any position. No
claim is made to the telescopic extension of the legs as forming any part
of this Invention.
EDWARD LE GROS. (L.S.)

page_text: I hereby grant my fiat, giving leave to the above-named Edward
Le Gros, of Stoke Newington, in the County of Middlesex, Gentleman,
to file in the Great Seal Patent Office, with the Specification to which
the same relates, the above-written Disclaimer and Memorandum of
Alteration.