IMPROVEMENTS IN MACHINERY FOR BORING ROCK AND OTHER MINERAL
Year: 1865

page_text: LETTERS PATENT to Frederick Bernard Doering, of Bayswater, in the
County of Middlesex, Civil Engineer, temporarily resident at Altendorf,
in the Kingdom of Prussia, for the Invention of "IMPROVEMENTS IN
MACHINERY FOR BORING ROCK AND OTHER MINERAL."-A communication
from Carl Sachs, residing at Oberhausen, Prussia.
Sealed the 8th June 1866, and dated the 18th December 1865.
PROVISIONAL SPECIFICATION left by the said Frederick Bernard Doring
at the Office of the Commissioners of Patents, with his Petition, on
the 13th December 1865,
I, FREDERICK BERNARD DŒERING, of Bayswater, in the County of Middlesex,
Civil Engineer, temporarily resident at Altendorf, in the Kingdom of Prussia,
do hereby declare the nature of the said Invention for "IMPROVEMENTS IN
MACHINERY FOR BORING ROCK AND OTHER MINERAL," to be as follows:-
This Invention consists in constructing boring machinery as hereafter
described. Between two horizontal shafts forming side supports I fit
horizontally a steam or air cylinder; one of these shafts is threaded for the
purpose of moving the cylinder forward as the work proceeds. A piston
works in the cylinder, and carries a piston rod which passes through the
front end of the cylinder, and has a drill or other boring tool fixed on its
front end; the piston rod also passes through the back end of the cylinder,
and is attached to a cross head which slides in slots ent in the horizontal

page_text: shafts. The upper ends of two arms pass through the cross head, while their
lower ends are pivoted to a transverse rod attached to a tail piece depending
from the cover of the cylinder; as the cross head moves in and out the arms
move forwards and backwards upon their pivots. Tappets are keyed to the
arms or to the transverse rod, and move with them. Ono tappet works a
rod connected to a slide valve for opening and closing the steam ports of the
cylinder. The tappet nuts are kept from moving by means of keys. The
other tappet works a vertical rod, which through the intermediation of a
paul and ratchet wheel imparts rotary motion to the piston rod, and conse-
quently to the drill; this operation only takes place on the return stroke of
the piston rod. A key on the piston rod and a slot in a collar in which the
ratchet wheel is screwed allow of the piston rod moving backwards and
forwards freely, but compel it to turn with the ratchet wheel. One end of a
lever pivoted at any convenient part works in a slot in the vertical rod before
mentioned, and receives motion therefrom; the other end of this lever works
by means of a paul a second ratchet wheel by which the machinery is moved
forward. The teeth of this ratchet wheel are divided so that the piston must
mako nearly a full stroke to enable the paul to catch a tooth of and move the
ratchet wheel; the machinery cannot, therefore, move forward faster than the
drill penetrates the rock. The machinery is attached at each extremity of
the two horizontal shafts to any suitable frame or carriage firmly secured
between the floor and the roof or sides of the gallery in which the machinery is
at work. The machinery is moved back upon this supporting frame by suitable
gearing worked by a handle or otherwise when required to commence a fresh
drill
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Frederick Bernard Doering in the Great Seal Patent Office
on the 18th June 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FREDERICK
BERNARD DŒERING, of Bayswater, in the County of Middlesex, Civil Engineer,
temporarily resident at Altendorf, in the Kingdom of Prussia, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Thirteenth day of December, in the year of our
Lord One thousand eight hundred and sixty-five, in the twenty-ninth year
of Her reign, did, for Herself, Her heirs and successors, give and grant unto

page_text: me, the said Frederick Bernard Doering, Her special licence that I, the said
Frederick Bernard. Dæring, my executors, administrators, and assigns, or
such. others as I, the said Frederick Bernard Doering, 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 MACHINERY FOR BORING ROCK AND
OTHER MINERAL," (communicated to me by Carl Sachs, a person resident at
Oberhausen, Prussia,) upon the condition (amongst. others) that I, the said
Frederick Bernard Doering, 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 Patent.
NOW KNOW YE, that I, the said Frederick Bernard Doering, do heroby
declare the nature of the said Invention, and in what manner the sanie
is to be performed, to be particularly described and ascertained in and by
the following statement thereof, reference being had to the Drawings hereunto
annexed, that is to say:―
This Invention consists in constructing boring machinery as hereafter
lescribed. Between two horizontal shafts forming side supports I fit hori-
zontally a steam or air cylinder. .One of these shafts is threaded for the
purpose of moving the cylinder forward as the work proceeds; a piston works
in the cylinder and carries a piston rod which passes through the front end of
the cylinder and has a drill or other boring tool fixed on its front end. .I
also carry the piston rod through the back end of the cylinder and attach it to
a cross head which slides in slots cut in the horizontal shafts. The upper
ends of two arms pass through the cross head, while their lower ends are
pivoted to a transverse shaft or rod attached to a tail piece depending from
the cover of the cylinder, as the cross head moves in and out the arms nove
forwards and backwards upon their pivots. Tappets are keyed to the arms
or to the transverse shaft, and move with them. One set of tappets works
a rod connected to a slide valve for opening and closing the steam ports of
the cylinder; the tappet nuts are kept from moving by means of keys. The
other tappet works a rod, which through the intermediation of a paul and
ratchet wheel imparts rotary motion to the piston rod, and consequently to the
drill. I prefer this operation to take place on the return stroke of the piston

page_text: rod. A key or feather on the piston rod and a slot in a collar on which the
ratchet wheel is screwed allow of the piston rod míoving backwards and
forwards freely, but compel it to turn with the ratchet wheel. One end of a
lever pivoted at any convenient part works in a slot in the rod before mentioned
and receives motion therefrom; the other end of this lever works by means
of a paul a second' ratchet wheel by which the machinery is moved forward.
The teeth of this ratchet wheel are divided so that the piston must make
nearly a full stroke to enable the paul to catch a tooth of and move the
ratchet wheel; the machinery cannot therefore move forward faster than the
drill penetrates the rock.
Figure 1 of the accompanying Drawings is a side elevation; Figure 2 a
longitudinal section; and Figure 3 an elevation of the rear end of a boring
machine constructed according to this Invention.
A is a steam or air cylinder fitted horizontally between two fixed shafts B,
C forming side supports. The shaft C is threaded as shown. D is a piston
working in the cylinder A, and carrying or formed in a piece with a piston
rod E, which passes through the front end of the cylinder, and has a boring
tool fixed on its front end; I also carry the rod E through the back end of
the cylinder and attach it to a cross head a which slides in slots b, b, cut in
shafts B, C. G, G, are two arms, the upper ends of which pass through the
cross head a, and the lower ends of which are pivoted to a transverse shaft I
attached to a tail piece J depending from the cover L of the cylinder. As
the cross head a moves in and out with the piston rod E, the arms G, G,
move backwards and forwards upon their pivots. Tappets H, H and K are
keyed to the shaft I or to the arms G, G, and move therewith. One set of
tappets H, H, works by means of two nuts c, c, a rod N connected to a slide
valve M for opening and closing the ports d, d; of the cylinder 'A.. e is the
inlet port. The tappet nuts c, c, are kept from moving by means of keys o, o.
The tappet K works a vertical rod or spindle P, which through the inter-
mediation of a paul Qand a ratchet wheel R screwed to a collar T on the
piston rod E imparts rotary motion to the piston rod, and consequently to the
drill or boring tool. This arrangement for imparting rotary motion to the
boring tool is an essential feature of the Invention, and I prefer the operation
to take place on the return stroke of the piston rod. A key or feather S on
the piston rod E and a slot in the collar T on which the ratchet wheel R is
screwed allow of the piston rod moving backwards and forwards freely, but
compel it to turn with the ratchet wheel. U is a lever, oue end of which works
in a slot in the vertical rod P and receives motion from this rod; the other
end of the lever U works by means of a paul V a ratchet wheel W, which by

page_text: gearing into the thread of the shaft C moves the machinery forward as the work
progresses. The teeth of the wheel W are, as before mentioned, divided so
that the piston D must make nearly full stroke to enable the paul V to
catch a tooth and move the wheel; the machinery cannot, therefore, move
forward faster than the drill penetrates the rock. This direct method of
moving the drill and machine forward and only as fast as the hardness of the
material operated upon will allow is an important feature in this Invention.
Z is a bevil wheel keyed to the wheel W and in gear with another bevil
wheel X, which is operated by a handle Y when it is required to move the
machine back upon its supporting frame to commence a fresh drill.
A modification of the machine before described is represented in Figures
4 to 9; Figure 4 is a side elevation; Figure 5, a longitudinal section ;
Figure 6, a plan; Figure 7, an elevation of the rear end; Figure 8, a
section through the line x, x, looking forward; and Figure 9 a front elevation.
In this modification the second ratchet wheel W, by means of which the for-
ward motion is imparted to the machine, is placed on the collar T in front of
the ratchet wheel R, and has keyed thereto a toothed wheel X which gears into
another toothed wheel Y working on the fixed threaded shaft C. The ratchet
wheel W is in this modification rotated by a paul V on a vertical rod P¹,
worked by a small lever or tappet G¹on the shaft I.
A second modification is represented in side elevation in Figure 10, in plan
in Figure 11, in back elevation in Figure 12, and in longitudinal section in
Figure 13. Here the cross head and the back prolongation of the piston rod
are dispensed with. The shaft I which carries the tappets is worked from a
collar A' on the piston rod E in front of the cylinder A. The collar A¹ is
connected by rods B¹ to levers C¹ pivoted at D¹. These levers C₁ take the
place of the arms G in the previous arrangements, and have connected to
them rods E attached by links F¹ to the shaft I; as the piston D moves
backwards and forwards these levers and rods are also caused to oscillate,
and the shaft I receives a reciprocating motion on its axis to work the tappets.
The shaft I in this modification is for convenience connected to the valve cover
instead of to the cylinder cover. The machine is attached at each extremity
of the two horizontal shafts to any suitable frame or carriage firmly secured
between the floor and the roof or sides of the gallery in which the machine
is at work.
And having now described the nature of the said Invention, and in what
manner the same is to be performed, I declare that I claim as the "Improve-
ments in Machinery for Boring Rock and other Mineral,"
First, the arrangement and combination of parts of boring machinery

page_text: substantially as herein-before describe.l and represented in the accompanying
Drawings.
Second, fitting a steam or air cylinder between two horizontal shafts, one of
which is threaded substantially as and for the purpose herein-before described
and represented in the accompanying Drawings.
Third, the arrangement, substantially as herein-before described and repre-
sented in the accompanying Drawings, of a shaft carrying tappets or levers
which act upon one or more rods or spindles, and through them upon pauls
for taking into ratchet wheels, by means of which rotary motion is imparted
to the piston rod and to the boring tool and a forward motion to the engine
as the work proceeds.
Fourth, the combination, substantially as herein-before described and repre-
sented in the accompanying Drawings of the slide valve with the shaft carrying
the tappets or levers by which the rotary movement is given to the piston rod
and the forward movement to the engine.
In witness whereof, I, the said Frederick Bernard Doering, have here-
unto set my hand and seal, this Ninth day of June, One thousand
eight hundred and sixty-six.