IMPROVEMENTS IN SELF-ACTING MACHINERY FOR TURNING, PROVISIONAL SPATION PLANING, AND BORING THE HEAVY PARTS OF ENGINEERING CON. STRUCTIONS
Year: 1873

page_text: LETTERS PATENT to John Thomas Tannett, John Craven, and
Samson Fox, of Leeds, in the County of York, Engineers, for the
Invention of "IMPROVEMENTS IN SELF-ACTING MACHINERY FOR TURNING,
PROVISIONAL SPECIFICATION left by the said John Thomas Tannett,
John Craven, and Samson Fox at the Office of the Commissioners
of Patents, with their Petition, on the 21st May 1873.
We, JOHN THOMAS TANNETT, JOHN CRAVEN, and SAMSON Fox, of
Leeds, in the County of York, Engineers, do hereby declare the nature.
of our said Invention for "IMPROVEMENTS IN SELF-ACTING MACHINERY FOR
TURNING, PLANING, AND BORING THE HEAVY PARTS OF ENGINEERING CON.
STRUCTIONS," to be as follows:-
The object of this Invention is to be able to operate by one or more
cutting tools upon the top, side, or sides of any piece of heavy machinery
or mechanical construction at one fixing. For these purposes a revolving
table upon a fixed bed is used in combination with planing brackets

page_text: travelling longitudinally backwards and forwards upon suitable slides
which are a part of the fixed beds, these brackets carrying a breast or
cross slide furnished with suitable saddles and tool holders. Or the
brackets and breast may remain stationary whilst each vertical side or
sides of the object or article to be planed or surfaced may be placed in
the desired position by the use of a revolving table. The saddle or
saddles carrying the tool boxes upon the cross slides or breast have a
suitable planing or to-and-fro motion, whilst the necessary up or down
traverse is communicated to the cross slide or breast.
For the purposes of turning, boring, or circular surfacing a fixed or
stationary vertical boring bar is provided or applied, having a sliding
boring head or cutter boss for internal surfaces; whilst the exterior
cylindrical surfaces may be operated upon by communicating a rotary
motion to the revolving table, the brackets, cross slide, or breast being
so placed and actuated as to either surface or turn the upper or vertical 1
sides of the article or object to be operated upon.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Thomas Tannett, John Craven, and Samson
Fox in the Great Seal Patent Office on the 21st November 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JOHN
THOMAS TANNETT, JOHN CRAVEN, and SAMSON Fox, of Leeds, in the
County of York, Engineers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-first day of May, in the year of
our Lord One thousand eight hundred and seventy-three, in the thirty-
sixth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto us, the said John Thomas Tannett, John Craven, and
Samson Fox, Her special license that we, the said John Thomas Tannett,
John Craven, and Samson Fox, our executors, administrators, and
assigns, or such others as we, the said John Thomas Tannett, John
Craven, and Samson Fox, our 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, should and
lawfully might make, use, exercise, and vend, within the United King.

page_text: dom of Great Britain and Ireland, the Channel Islands, and Isle of
Man, an Invention for "IMPROVEMENTS IN SELF-ACTING MACHINERY FOR
TURNING, PLANING, AND BORING THE HEAVY PARTS OF ENGINEERING CONSTRUC
TIONS," upon the condition (amongst others) that we, the said John
Thomas Tannett, John Craven, and Samson Fox, our executors or
administrators, by an instrument in writing under our hands and seals,
or under the hand and seal of one of us, 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 John Thomas Tannett, John
Craven, and Samson Fox, do hereby declare the nature of our said
Invention, and in what manner the same is to be performed, to be par-
ticularly described and ascertained in and by the following statement,
reference being had to the accompanying Drawings, and to the letters
and figures marked thereon, that is to say:-
Our said Invention has for its object the affording facility for operating.
by one or more cutting tools upon the top, side, or sides of any piece of
heavy machinery or mechanical construction at one fixing. For these
purposes a revolving table upon a fixed bed is used in combination with
planing brackets travelling longitudinally backwards and forwards upon
suitable slides which form a part of the fixed bed, these brackets
carrying a breast or cross slide furnished with suitable saddles and tool
holders. Or the brackets and breast may remain stationary whilst each
vertical side or sides of the object or article to be planed or surfaced may
be placed in the desired position by the use of a revolving table. The
saddle or saddles carrying the tool boxes upon the cross slide or breast
have a suitable planing or to-and-fro motion, whilst the necessary up-or-
down traverse is communicated to the cross slide or breast.
For the purposes of turning, boring, or circular surfacing a fixed or
stationary vertical boring bar is provided or applied, having a sliding
boring head or cutter boss for internal surfaces; whilst the exterior
cylindrical surfaces may be operated upon by communicating a rotary
motion to the revolving table or brackets, cross slide, or breast, being
so placed and actuated as to either surface or turn the upper or vertical
sides of the article or object to be operated upon.

page_text: And in order that our said Invention may be fully understood we shall
now proceed more particularly to describe the same, and for that purpose
shall refer to the several Figures on the annexed Sheet of Drawings, the
same letters of reference indicating corresponding parts in all the
Figures.
Figure 1 of our Drawings represents a plan, Figure 2, a side elevation,
and Figure 3, an elevation of the front end of our improved machine.
This improved machine consists of a fixed or stationary bed A
(Figure 1), carrying the table B, on the under side of which is a circular
V rib or projection fitting into a corresponding V recess provided for
receiving the same in the fixed bed A; this table can be rotated at will
by means of the worm and worm wheel C, motion being given to the
same by the cone gearing and shaft D¹, D³, D³; a pair of brackets or
uprights E, secured and braced together at the top by the cross bar F,
are fitted so as to slide or travel to and fro when required upon the
planed surfaces of the fixed bed A, motion being given to the same by
the twin screws a¹, a³, which are driven by the reversing motion shafts
and bevel wheels 61, 62, 63, 6'; by these means the brackets or uprights E
with the breast or cross slide G and tool holders combined are traversed
backwards and forwards at a suitable speed for planing longitudinally,
or they may be used for moving the same into position when required
for boring or cross surfacing; sliding vertically on these brackets or
uprights E is the breast or cross slide G, which is traversed up and
down by means of the screws H, H, these screws being actuated simul-
taneously by a cross shaft I and two pairs of bevel wheels J, J, in the
usual well known manner; upon this cross slide or breast are two saddles
K, K, fitted with tool holders having horizontal, vertical, and angular
movements for adjusting the position of the cutting tools; these saddles
and tool holders may be set to travel to and fro across the breast or
cross slide G, either at a planing or cutting speed, or at a feed traverse
speed, the latter being effected by the feed motion shown on the side of
the bracket E¹, and the planing or cutting speed when required by the
driving motion shown on the side of the bracket E².
For boring or turning purposes the article to be operated upon is fixed
to the table D, and is caused to revolve by the worm and worm wheel
motion C and D¹, D², D³. The vertical boring bar L provided with a
boring head or block M. carrying cutters fits into a bearing and foot

page_text: step N1, N2, fixed to and under the stationary bed A, the top end of the
bar being held in position by the bearing O upon the cross bar F. The
boring bar L may remain stationary whilst the table B and the article
upon it may revolve, the boring head or block with cutters having a
vertical feed traverse or motion given to it by means of a screw fitted
with the self-acting motion P¹, P2; or the table B and the article fixed
upon it may remain stationary and the bar L caused to revolve by means
of the worm wheel, worm, and driving motion Q¹, Q³, the boring head or
block being traversed at the necessary feed speed by the means before
described. It is obvious that the table B when caused to revolve may
be used as a divider for securing accuracy in each change of its position.
Having now described and particularly ascertained the nature of our
said Invention, and the manner in which the same is or may be used or
carried into effect, we would observe in conclusion that what we consider
to be novel and original and therefore claim as the Invention secured to
us by the herein-before in part recited Letters Patent is,―
First. The application and use to and in self-acting machinery for
turning, planing, and boring the heavy parts of engineering construc-
tions of a fixed bed provided with a platform or tablo that is free to
revolve so as to be able to bring the article into any position at one
fixing, substantially as herein-before described.
Second. The imparting a continuous rotatory motion to the said plat-
form or table in the manner of a horizontal surfacing plate for the
purpose of boring and turning heavy articles secured thereon, as herein-
before described.
Third. The combination of travelling brackets or uprights connected
by a cross bar and breast and cross slide with a revolving table or plat-
form for planing longitudinally whilst the article remains stationary,
substantially as herein-before described.
Fourth. The application and use of the planing saddles and tool
holders for planing either crosswise, horizontally, or vertically all or any
of the parts of an article which may be brought into position by means
of the before-mentioned revolving table or platform, substantially as
herein-before described.
Fifth. The application and use of the said revolving table as a divider
for securing accuracy in each change of position, as hercin-before
dogarihod

page_text: Sixth. The general canstruction and arrangement of apparatus for
boring, turning, and planing at one fixing the heavy parts of engineering
constructions, substantially as herein-before described and illustrated by
the Drawings annexed.
In witness whereof, we, the said John Thomas Tannett, John 5
Craven, and Samson Fox, have to this our Specification set our
hands and seals, this Nineteenth day of November One thousand
eight hundred and seventy-three.