IMPROVEMENTS ROCK REAMERS, WHICH INVENTION IS APPLICABLE TO OTHER PURPOSES
Year: 1875

page_text: IN
LETTERS PATENT to Benjamin Joseph Barnard Mills, of the Firm of
Harris and Mills, of 23, Southampton Buildings, in the County of
Middlesex, Patent Agent, for the Invention of "IMPROVEMENTS
ROCK REAMERS, WHICH INVENTION IS APPLICABLE TO OTHER PURPOSES." -A
communication from abroad by Darius William Siprell, of Rivière
du Loup En bas, in the County of Temiscouata, in the Province of
Quebec, Canada, Machinist.
Sealed the 25th June 1875, and dated the 22nd January 1875.
PROVISIONAL SPECIFICATION left by the said Benjamin Joseph
Barnard Mills at the Office of the Commissioners of Patents, with
his Petition, on the 22nd January 1875.
:
I, BENJAMIN JOSEPH BARNARD MILLS, of the Firm of Harris and
Mills, of 23, Southampton Buildings, in the County of Middlesex,
Patent Agent, do hereby declare the nature of the said Invention for
IMPROVEMENTS ON ROCK REAMERS, WHICH INVENTION IS APPLICABLE TO OTHER
PURPOSES," a communication to me from abroad by Darius William
Siprell, of Rivière du Loup En bas, in the County of Temiscouata, in
the Province of Quebec, Canada, Machinist, to be as follows:-

page_text: cavities in a drilled hole without enlarging the mouth of the orifice or
bore to receive an explosive charge, or for enlarging the bore of any
metal or other tube uniformly or tapering, or for forming one or more
enlarged chambers therein at any part of the bore; and it consists, —
First. In the combination with a supporting frame of a tubular
reaming shaft, having a central rod for ejecting or retracting through
slots in said shaft, the reaming wings pivotted thereto.
Secondly. In combination with such supporting frame and tubular
shaft a screw shaft for rotating the tubular reaming shaft in the process
of reaming.
Thirdly. In combination with such screw shaft and rotating reaming
shaft a supporting frame having adjustable screw extension and con-
tracting legs to adjust and fix the said frame securely, and a guide
barrel to keep the reaming shaft in its axis of rotation.
Fourthly. Providing the legs of the supporting frame with feet for
anchoring the frame to the surface to retain the same fixedly.
Fifthly. The combination of the rotating endless screw shaft, a
rotating toothed disc, and tubular screw shaft for rotating the reamer
shaft.
Sixthly. In combination with the hollow reaming shaft and tubular a
screw shaft the application of set screws for retaining the reaming shaft
adjustably at any desired height in the bore.
Seventhly. In combination with the reamer shaft and central rod the
nut and screw mechanism for extending and retracting the reamer
wings and retaining them adjusted at any desired extension.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Benjamin Joseph Barnard Mills, in the Great Seal
Patent Office on the 22nd July 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, 1, BENJAMIN
JOSEPH BARNARD MILLS, of the Firm of Harris and Mills, of 23, South-
ampton Buildings, in County of Middlesex, Patent Agent, send
greeting.
TO ALL TO WHOM THESE PRESENTS SHALL COME, 1, BENJAMIN
JOSEPH BARNARD MILLS, of the Firm of Harris and Mills, of 23, South-
ampton Buildings, in County of Middlesex, Patent Agent, send
greeting.

page_text: WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-second day of January, in
the year of our Lord One thousand eight hundred and seventy-five, in
the thirty-eighth year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto me, the said Benjamin Joseph Barnard
Mills, Her special license that I, the said Benjamin Joseph Barnard
Mills, my executors, administrators, and assigns, or such others as I,
the said Benjamin Joseph Barnard Mills, 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 "IMPROVEMENTS IN ROCK REAMERS,
WHICH INVENTION IS APPLICABLE TO OTHER PURPOSES," a communication to me
from abroad by Darius William Siprell, of Rivière du Loup En bas, in
the County of Temiscouata, in the Province of Quebec, Canada,
Machinist, upon the condition (amongst others) that I, the said
Benjamin Joseph Barnard Mills, 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 Benjamin Joseph Barnard Mills, do
hereby declare the nature of the said Invention, and in what manner
the same 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, and to the figures and letters marked
thereon, that is to say;-
This Invention relates to a reamer for forming a cavity or a series of
cavities in a drilled hole without enlarging the mouth of the orifice or
bore to receive an explosive charge, or for enlarging the bore of any
metal or other tube uniformly or tapering, or for forming one or more
enlarged chambers therein at any part of the bore; and it consists,-
First. In the combination with a supporting frame of a tubular
reaming shaft having a central rod for ejecting or retracting through
slots in said shaft, the reaming wings pivotted thereto.

page_text: Secondly. In combination with such supporting frame and tubular
shaft a screw shaft for rotating the tubular reaming shaft in the process
of reaming.
Thirdly. In combination with such screw shaft and rotating reaming
shaft a supporting frame having adjustable screw extension and con-
tracting legs to adjust and fix the said frame securely, and a guide
barrel to keep the reaming shaft in its axis of rotation.
Fourthly. Providing the legs of the supporting frame with feet for
anchoring the frame to the surface to retain the same fixedly.
Fifthly. The combination of the rotating endless screw shaft, a
rotating toothed disc, and tubular screw shaft for rotating the reamer
shaft.
Sixthly. In combination with the hollow reaming shaft and tubular
screw shaft the application of set screws for retaining the reaming shaft
adjustably at any desired height in the bore.
Seventhly. In combination with the reamer shaft and central rod the
nut and screw mechanism for extending and retracting the reamer
wings and retaining them adjusted at any desired extension.
In the accompanying Drawings Figure 1 is an elevation of the
improved reamer; Figure 2 is a vertical section of the same.
A is the table or supporting frame; B are the legs hinged thereto and
capable of being shortened or lengthened by means of screws a; C are
hooked feet to admit of the frame being securely held by anchoring the
feet in the rock; D is a tube, the upper end fixed in the table A, the
lower end taperingly constructed to enter the mouth of the hole to be
reamed and to receive snugly the reaming shaft hereafter referred to,
which turns therein in the process of reaming; E is a tubular screw
shaft rotating in the table A, which has a thread to receive the same;
F is a hollow shaft fitting into the shaft E and revolving therewith; G is
a rod in the shaft F; to the lower end of the rod G are pivoted two
reaming wings H, which when the rod is pushed downward project
through slots near the lower end of the shaft F by coming in contact
with the lower ends of the slots, thus extending the cutting wings hori-
zontally. When the rod is drawn upward the wings close together in
the shaft by their contact with the upper ends of the slots. It is obvious
therefore that by inserting the shaft F in the bore and projecting the

page_text: cutting wings a chamber will be reamed without enlarging the mouth of
the bore.
I will now describe the means for operating the reamer shaft F and
reaming wings:-I are set screws for holding the reaming shaft F in
the tubular shaft E fixedly so as to turn therewith; J is a nut screwing
on the end of the shaft F; K is a nut screwing on the rod G, which
nut K is provided with a crank handle for turning the same, thereby
lowering or raising the rod in the shaft F; L is a nut screwing on the
rod G to clamp the nut K on the nut J, thereby retaining the rod G in
any desired position fixedly; M is an endless screw shaft mounted on
the table A and engages with a toothed collar N fitted to a sleeve in the
table A, so that by turning the screw shaft by the crank handles O or
other suitable mechanism the toothed collar N turns the tubular screw
shaft E and with it the shaft F, thus giving reaming operation to the
cutters. The tubular screw shaft E has a vertical groove b cut therein
to receive the end of a pin projecting from the inside of the sleeve to
allow the screw tube E to descend while rotating.
If desired the cutters H may be extended by torsional mechanism or
other mechanical means, operated by the rod G, or its equivalent may
be employed, and I do not confine myself to the particular way shown,
which however I consider the preferable mode.
Means other than by set screws I may be employed for holding the
reaming shaft F in the tubular shaft E, and in cases when a long heavy
shaft and rod are employed a clamping device would be preferable.
The apparatus is capable by a proper regulation and operation of the
rod G and tubular screw shaft E simultaneously to cut a spiral thread or
worm in a tube of metal to receive a screw.
Having thus described the nature of the said Invention and the mode
in which the same is carried into effect, I would have it understood that
what I claim is,-
First. In combination with a supporting frame a tubular reaming
shaft F having a rod G therein for ejecting or retracting the cutters H,
as set forth.
Second. In combination with a supporting frame and tubular reaming
shaft F the tubular screw shaft E for rotating the shaft F and cutters H,
as set forth.

page_text: Third. In combination with the screw shaft E and reaming shaft F a
supporting frame having adjustable extension and contraction screw
legs B, anchor feet C, and guide tube D, as set forth.
Fourth. The combination of the rotating tubular screw shaft Ẹ,
rotating toothed collar N, and endless screw shaft. M for rotating the
reamer shaft, as set forth.
Fifth. In combination with the reamer shaft F and central rod G the
nut and screw mechanism J, K, L, as and for the purpose set forth.
;
Sixth. In combination with the hollow reaming shaft F and tubular
screw shaft E the set screws I or a suitable clamping device for retaining
the shaft F adjustably at any desired height.
In witness whereof, I, the said Benjamin Joseph Barnard Mills,
have hereunto set my hand and seal, this Twentieth day of
July, in the year of our Lord One thousand eight hundred and
seventy-five.
B. J. B. MILLS. (L.S.)