A NEW OR IMPROVED BORING INSTRUMENT
Year: 1872

page_text: LETTERS PATENT to Alexander Prince, of the Office for Patents,
4, Trafalgar Square, Charing Cross, in the County of Middlesex,
for the Invention of "A NEW OR IMPROVED BORING INSTRUMENT."-A
communication from abroad by Julius Von Sparre, residing at
Oherhanson in the Kinodam of D…………
PROVISIONAL SPECIFICATION left by the said Alexander Prince at
the Office of the Commissioners of Patents, with his Petition, on
the 8th July 1872.
I, ALEXANDER PRINCE, of the Office for Patents, 4, Trafalgar Square,
Charing Cross, in the County of Middlesex, do hereby declare the
nature of the said Invention for "A NEW OR IMPROVED BORING INSTRUMENT,”
(a communication to me from abroad by Julius Von Sparre, a resident
at Oberhausen, in the Kingdom of Prussia,) to be as follows:-
This Invention relates to a new or improved construction of boring
instrument whereby the operation of turning the boring chisel is effected

page_text: by a vertical instead of a rotary movement, the instrument being operated
by a rising and falling action of all portions.
The instrument consists of an outer main tube or hollow cylinder sup-
ported by a strap terminating with a vertical stem, on which are fixed
slotted guides for the stirrup of the borer. The stirrup is provided at its
upper extremity with two wings set on a boss, the wings serving to
prevent, by their resistance, the rotating motion of the stirrup itself
while the instrument is in operation beneath the water.
The shaft to which the chisel or borer is fixed is held firmly, or in one
piece, with a second hollow cylinder or tube entering the lower extremity
of the first or outer tube, and being free to turn therein. This interior
tube is furnished with a cross pin or stop which gears in a slot or slots cut
in the outer cylinder, so that the interior tube is able to turn to a certain
extent of a revolution in the upper or wide part of the slot, and to rise
and fall in the lower or narrow part thereof, the slots being provided with
an angular or oblique step descending from the wide to the narrow
groove. The upper part of the interior cylinder has two vertical guiding
grooves cut therein, to receive two corresponding forks descending from
a third cylinder set in the upper part of the first or outer cylinder.
The third cylinder is provided with a strap and vertical stem, and is
supported by a pall or cutch within the first cylinder. On the stem and
beneath the level of the pall a sliding boss is placed attached to two
vertical rods which pass on each, side of the strap of the first cylinder,
and are connected to a disc or float, so that the rising or falling of the
float elevates or depresses the sliding boss, and disengages or brings into
gear the pall with the stem, so as to release the stem and strap of the
third cylinder, and permit it to descend with its fork to the second
cylinder, or vice versa. The third cylinder is likewise provided with a
cross pin, gearing in a slot or slots cut in the first outer tube, the slot
being formed the true width of the slot from its upper part downwards,
terminating in an enlarged or curvilinear open groove to permit the turn
of the pin with its cylinder.
The apparatus or instrument works under water, and is actuated by
means of a wire rope attached to a ring above the winged boss.
The resistance of the water causes the disc or float to rise and release
the pall. The third cylinder, guided by its cross pin, falls down its slot,
entering the curve, and the second cylinder is turned from right to left

page_text: by the fork. The lower pin of the cylinder slides on the oblique step of
its slot, and then the fall of the chisel shaft and cylinder takes place for
the entire length of the slot; consequently it will follow that by the
reversal of these motions, caused by the continuous elevation and
depression of the cylinders by means of the wire rope, the chisel will be
turned intermittently, and the boring will be effected as first described.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Alexander Prince in the Great Seal Patent Office
on the 8th January 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ALEXANDER
PRINCE, of the Office for Patents, 4, Trafalgar Square, Charing Cross,
in the County of Middlesex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eighth 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 Alexander Prince, Her special licence
that I, the said Alexander Prince, my executors, administrators, and
assigns, or such others as I, the said Alexander Prince, my executors,
administrators, 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." A NEW OR IMPROVED BORING
INSTRUMENT," (a communication to me from abroad by Julius Von
Sparre, a resident at Oberhausen, in the Kingdom of Prussia,) upon
the condition (amongst others) that I, the said Alexander Prince,
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 Alexander Prince, do hereby declare
the nature of my said Invention, and in what manner the same is to be

page_text: performed, to be particularly described and ascertained in and by the
following statement and accompanying Drawings, that is to say :-
This Invention relates to a new or improved construction of boring
instrument, whereby the operation of turning the boring chisel is effected
by a vertical instead of a rotary movement, the instrument being
operated by a rising and falling action of all portions.
The instrument consists of an outer main tube or hollow cylinder
supported by a strap terminating with a vertical stem, on which are
fixed slotted guides for the stirrup of the borer. The stirrup is provided
at its upper extremity with two wings set on a boss, the wings serving
to prevent, by their resistance, the rotating motion of the stirrup itself,
while the instrument is in operation beneath the water.
The shaft to which the chisel or borer is fixed is held firmly, or in one
piece, with a second hollow cylinder or tube entering the lower extremity
of the first or outer tube, and being free to turn therein. This interior
tube is furnished with a cross pin or stop which gears in a slot or slots
cut in the outer cylinder, so that the interior tube is able to turn to a
certain extent of a revolution in the upper or wide part of the slot, and
to rise and fall in the lower or narrow part thereof, the slot being pro-
vided with an angular or oblique step descending from the wide to the
narrow groove. The upper part of the interior cylinder has two vertical
guiding grooves cut therein to receive two corresponding forks descending
from a third cylinder set in the upper part of the first or outer cylinder.
The third cylinder is provided with a strap and vertical stem, and is
supported by a paul or catch within the first cylinder on the stem and
beneath the level of the paul, a sliding boss is placed attached to two
vertical rods which pass on cach side of the strap of the first cylinder,
and are connected to a disc or float, so that the rising or falling of the
float elevates or depresses the sliding boss, and disengages or brings into
gear the paul with the stem, so as to release the stem and strap of the
third cylinder, and permit it to descend with its fork to the second
cylinder, or vice versa. The third cylinder is likewise provided with a
cross pin gearing in a slot or slots cut in the first outer tube, the slot
being forked the true width of the slot from its upper part downwards,
terminating in an enlarged or curvilinear open groove to permit the turn
of the pin with its cylinder.

page_text: The apparatus or instrument works under water, and is actuated by
means of a wire rope attached to a ring above the winged boss.
The resistance of the water causes the disc or float to rise and release
the paul. The third cylinder, guided by its cross pin, falls down its slot,
entering the curve, and the second cylinder is turned from right to left
by the fork. The lower pin of the cylinder slides on the oblique step of
its slot, and then the fall of the chisel shaft and cylinder takes place for
the entire length of the slot. Consequently it will follow that by the
reversal of these motions, caused by the continuous elevation and
depression of the cylinders by means of the wire rope, the chisel will be
turned intermittently, and the boring will be effected as first described.
In order that the Invention may be better understood and explained
in detail, I have hereunto attached a Sheet of Drawing made upon a
scale of about three inches to the foot, letters of reference being marked
on similar parts on all the Figures alike.
Figure 1 represents a vertical section of the improved boring tool in
the position it would assume when in its highest position ready for its
downward stroke, and Figure 2 represents the same in elevation.
In these Figures the instrument, as shewn, consists of an outer main
tube or hollow cylinder a supported by a strap or fork e terminating in
the vertical stem e', on which are fixed the slotted guides f governing the
moventent of the stirrup g of the borer. This stirrup is provided at its
upper extremity with the wings h set on a boss c', these wings serving to
prevent, by their resistance, the rotating motion of the stirrup itself while
the instrument is in operation beneath the water. The shaft or tool
holder d, to which the chisel or borer d' is fixed, is held firmly by the
second hollow cylinder or tube c, or may form a portion of the same;
this cylinder or tube enters the lower extremity of the first or outer
tube a, and is free to turn therein. The interior of this tube c is provided
with a cross pin or stop i, which gears with, and is governed in its
motion by, the slots q, q', cut in the outer cylinder a, the formation of
which will allow the inner cylinder c, when the pin i is in the upper
portion of the slot q, to turn a portion of a revolution therein, and when
in the lower portion q' thereof, to be capable of vertically rising and
falling therein. The junction of the slots q, q', being provided with an

page_text: angular or oblique step descending from the wider portion of the slot q
to the narrower portion g². The upper part of the interior cylinder c is
also provided with two vertical guiding grooves s, s, cut therein to receive
two corresponding forks or males 81, 8¹, descending from the third
cylinder b, which is set in the upper part of the first or outer cylinder a.
This third cylinder is provided also with the strap or fork e² ter-
minating in the vertical stem e², and is supported by the paul or catch m
which is placed within the cylinder a. On the stem e³, and beneath the
level of the paul m, a sliding boss or collar n is placed, which is con-
nected to two vertical rods o¹, o', which project from the same and pass
on each side of the strap e to a point above the same, where they are
connected to a disc or float o, so that the rising or falling of such float
elevates or depresses the sliding boss or collar n, and so disengages or
brings into gear the paul m with the stem e², so as to release such stem
and strap e of the cylinder b, and permit it to descend with its fork s to
the second cylinder c, or vice versa. The third cylinder 6 is likewise
provided with a cross pin k gearing in the slot or slots t cut in the first
or outer tube a. This slot is equal in width to the pink from its upper
part downwards, where it terminates in a larger or curvilinear opening or
groove that will admit of a slight turn of the pin k with its cylinder b.
The apparatus or boring tool when working under water is actuated by
means of a wire or other rope, which is attached to the ring u above the
winged boss h.
The boring tool or instrument, by the following description, when in
operation under water will readily be understood on referenco to the
Drawing and lettered description herein contained. The resistance of
the water causes the disc or float o to rise and release the paul m, which
allows the third cylinder b, guided by its cross pin k, to fall down or
descend the slot t of the outer cylinder a, until it enters the curved
enlargement forming the termination of such slot, the action of which
gives to the second inner cylinder or tube ca turn from right to left.
The lower pin i forming a portion of the cylinder b, having by this
descent fallen upon the inclined or oblique portion of the slot I, is by
the turn of the before-mentioned cylinder c caused to enter the lower or
narrow portion of such slot, and thus allow of the free descent or fall of
the chisel shaft or tool holder d a distance equal to the entire length of
the slot q', thus giving by these successive descents or falls of the

page_text: cylindrical portion of the boring instrument and tool holder a partial
rotation to the boring tool. Consequently it will follow that by the
reversal of these motions, caused by the continuous elevation and
depression of the cylinders through the medium of the wire rope or other
equivalent, the chisel will be turned intermittently, and the boring will
be effected as first described.
Having now described the nature of my said Invention, together with
the method of carrying the same into practical effect, I wish it to be
distinctly understood in conclusion that I claim, the novel and peculiar
arrangement and construction of the apparatus forming the boring tool,
as herein described, together with its employment and use in the manner
and for the purpose as substantially described, set forth, and fully illus-
trated in the Drawing annexed.
In witness whereof, I, the said Alexander Prince, have hereunto
set my hand and seal, this Eighth day of January; in the year
of our Lord One thousand eight hundred and seventy-three.
Witness,
ALEX. C. M. PRINCE,
Office for Patents,
4, Trafalgar Square,
Charing Cross.
ALEX. PRINCE. (L.S.)