IMPROVEMENTS IN MACHINERY OR APPARATUS FOR DRILLING, TURNING, OR CUTTING AND SHAPING METALS OR OTHER MATERIALS
Year: 1869

page_text: LETTERS PATENT to James Pitt, Joseph Pitt, Edward Pitt, and
William Pitt, of Cleckheaton, in the County of York, Machine
Makers, for the Invention of "IMPROVEMENTS IN MACHINERY OR
APPARATUS FOR DRILLING, TURNING, OR CUTTING AND SHAPING METALS OR
OTHER MATERIALS."
Sealed the 24th May 1870, and dated the 27th November 1869.
PROVISIONAL SPECIFICATION left by the said James Pitt, Joseph Pitt,
Edward Pitt, and William Pitt at the Office of the Commissioners
of Patents, with their Petition, on the 27th November 1869.
We, JAMES PITT, JOSEPH PITT, EDWARD PITT, and WILLIAM PITT,
of Cleckheaton, in the County of York, Machine Makers, do hereby.
declare the nature of the said Invention for "IMPROVEMENTS IN MACHINERY
OR APPARATUS FOR DRILLING, TURNING, OR CUTTING AND SHAPING METALS OR
OTHER MATERIALS," to be as follows :-
This Invention consists of a rotary spindle mounted in a headstock
fixed upon a suitable bed or frame, and on one end of which is fixed.

page_text: a drill, cutter, or shaping instrument suitably formed for the purpose
required to be effected. On this spindle are also ordinary cone pullies
for driving same. Also another headstock is supported upon the said
frame, which is moveable or capable of sliding thereon towards or further
from the former, and carrying an excentric clutch or compound face
plate having clams, jaws, grippers or holders capable of sliding or being
moved nearer to or further from its centre simultaneously by projections
thereon entering excentric grooves formed in one part of the said plate,
and by turning or twisting the other part thereon the said clams are
expanded to receive and contracted as required, so as to grip and hold
the bars of metal or other material which may be placed betwixt them,
to be operated upon by the drill or other cutting instrument employed,
the moveable headstock being moved towards the drill or cutter by screw,
spindle, lever, or other suitable means.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said James Pitt, Joseph Pitt, Edward Pitt, and William
Pitt in the Great Seal Patent Office on the 27th May 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JAMES
PITT, JOSEPH PITT, EDWARD PITT, and WILLIAM PITT, of Cleckheaton,
in the County of York, Machine Makers, send greeting.
.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-seventh day of November, in
the year of our Lord One thousand eight hundred and sixty-nine, in
the thirty-third year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto us, the said James Pitt, Joseph Pitt,
Edward Pitt, and William Pitt, Her special licence, that we, the said
James Pitt, Joseph Pitt, Edward Pitt, and William Pitt, our executors,
administrators, and assigns, or such others as we, the said James Pitt,
Joseph Pitt, Edward Pitt, and William Pitt, our exccutors, adminis-
trators, and assigns, should at any time agree with, and no others, from
time to time and at all times thereafter during the term therein ex-
pressed, 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 OR
APPARATUS FOR DRILLING, TURNING, OR CUTTING AND SHAPING METALS OR OTHER

page_text: MATERIALS," upon the condition (amongst others) that we, the said
James Pitt, Joseph Pitt, Edward Pitt, and William Pitt, our executors or
administrators, by an instrument in writing under our, 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 we, the said James Pitt, Joseph Pitt, Edward
Pitt, and William Pitt, do hereby declare the nature of our said Inven-
tion, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement and accom-
panying Sheet of Drawings (that is to say) :-
This Invention consists of a rotary spindle mounted in a headstock
fixed upon a suitable bed or frame, and on one end of which is fixed a
drill, cutter, or shaping instrument suitably formed for the purpose
required to be effected. On this spindle are also ordinary cone pullies
for driving same. Also another headstock is supported upon the said
frame, which is moveable or capable of sliding thereon towards or further.
from the former and carrying an eccentric clutch or compound face plate
having clams, jaws, grippers, or holders capable of sliding or being
moved nearer to or further from its centre simultaneously by projections
thereon entering eccentric grooves formed in one part of the said plate,
and by turning or twisting the other part thereon the said clams are
expanded to receive and contracted as required, so as to grip and hold
the bars of metal or other material which may be placed betwixt them,
to be operated upon by the drill or other cutting instrument employed,
the moveable headstock being moved towards the drill or cutter by screw
spindle, lever, or other suitable means.
In order that the Invention may be clearly understood, we herein
give reference to an accompanying Sheet of Drawings illustrating the
same.
"DESCRIPTION OF THE DRAWINGS."
Fig. 1 is a side elevation of a machine constructed according to this
Invention; and Fig. 2 is a vertical cross section of the same.
..
A is the rotary spindle mounted in the headstock B, fixed on the
frame or bed C. On one end of this spindle are two cutters D, and

page_text: between which is a drill or square centre E. These cutters fit in slots
formed in the spindle, and are set and fixed therein by means of a ring F
and set screws G, shewn full size at Fig. 3.
The drill is shewn at Fig. 4, and the cutters at Fig. 5. Other forms of
cutters are shewn at Figs. 6 and 7, which may be fitted into the same
or other slots in the spindle. On the other end of the spindle are fast
and loose pulleys for driving the same, which may be cone pullies if
required. His a loose or moveable headstock on the same bed mounted'
in slides in the usual manner, and moved by hand wheel I and screw J.
This headstock carries an eccentric clutch or compound face plate K,
having grippers or holders M capable of being moved nearer to or
further, from the centre simultaneously by means of hand wheel and
screw N.
The particular construction of this plate and grippers are shewn more
clearly at Figs. 8 and 9,.where it will be seen that the plate is in two
parts, one part having radial slots for the grippers to move in, while
the other part has oblique slots which the grippers pass through, and
which by turning this plate on the other they are moved nearer to or
further from the centre, as will be readily understood.
In witness whereof, I, the said William Pitt, for and on behalf of
myself and the said James Pitt, Joseph Pitt, and Edward Pitt,
have hereunto set my hand and seal, this Twenty-fifth day of
May, in the year of our Lord One thousand eight hundred and
seventy.
Signed, sealed, and delivered
by the said William Pitt,
in the presence of
J. W. TASKER,
Clerk to W. Tasker,
Patent Offices,
Halifax & Bradford.
W. PITT. (L.S.)