IMPROVEMENTS IN THE CONSTRUCTION OF BEDS OF LATHES AND THE TABLES OF PLANING MACHINES
Year: 1859

page_text: LETTERS PATENT to Thomas Greenwood and John Batley, of Leeds, in
the County of York, Machinists, for the Invention of "IMPROVEMENTS
IN THE CONSTRUCTION OF BEDS OF LATHES AND THE TABLES OF PLANING
MACHINES."
Sealed the 11th April 1860, and dated the 16th November 1859.
PROVISIONAL SPECIFICATION left by the said Thomas Greenwood and
John Batley at the Office of the Commissioners of Patents, with their
Petition, on the 16th November 1859.
We, THOMAS GREENWOOD and JOHN BATLEY, of Leeds, in the County of
York, Machinists, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN THE CONSTRUCTION OF BEDS OF LATHES AND THE TABLES OF
PLANING MACHINES," to be as follows:-
The object of our Invention of improvements in the construction of the beds
of lathes and the tables of planing machines, is so to make the sliding parts of
these machines that the capability of resistance of such parts to lateral or
other thrust is increased, while at the same time the moving parts can slide
freely and without unnecessary friction.
In constructing a lathe according to our improvements, we so arrange the
parts that the thrust of the cutting tool is against a vertical slide on the same
side of the lathe bed as the cutting tool, and the back part of the saddle or
upper slide is held down by a right-angle slide on the side of the lathe bed
opposite to the cutting tool. An inclined slide on the front part of the lathe

page_text: bed keeps the saddle or upper slide against the vertical slide, so that the
saddle or upper slide can move freely without any shake or play. A slight
modification of the above will be found applicable for the tables or sliding
parts of planing machines for wood.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Thomas Greenwood and John Batley in the Great Seal
Patent Office on the 16th May 1860.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, THOMAS
GREENWOOD and JOHN BATLEY, of Leeds, in the County of York, Machinists,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixteenth day of November, in the year of our
Lord One thousand eight hundred and fifty-nine, in the twenty-third year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
us, the said Thomas Greenwood and John Batley, Her special license that we,
the said Thomas Greenwood and John Batley, our executors, administrators,
and assigns, or such others as we, the said Thomas Greenwood and John
Batley, our 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
Invention for "IMPROVEMENTS IN THE
Islands, and Isle of Man, an
CONSTRUCTION OF THE BEDS OF LATHES AND THE TABLES OF PLANING MACHINES,'
upon the condition (amongst others) that we, the said Thomas Greenwood
and John Batley, 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 I, the said John Batley (on behalf of myself and
of the said Thomas Greenwood), do hereby declare the nature of our said
Invention, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement, reference being
had to the Drawing hereunto annexed, and to the letters and figures marked
thereon (that is to say):-

page_text: The object of this Invention is so to construct slide rest lathes and planing
machines as to enable the sliding parts thereof effectually to resist the lateral
thrust caused by the contact of the cutting tool with the work under operation,
and that without increasing to any material degree the friction of such sliding
parts on their supporting slides.
In carrying out our Invention, we so construct the contact parts of the bed
and of the sliding saddle or table, that the lateral pressure caused by the thrust
of the cutting tool, say, of the lathe, is thrown against the vertical face of a
slide on the same side of the lathe bed as the cutting tool. The back part of
the saddle or upper slide is also held down by a right-angled slide on the side
of the lathe bed opposite to the cutting tool. An inclined slide on the front
part of the lathe bed keeps the saddle or upper slide against the vertical slide,
so that the saddle or upper slide can move freely without any shake or play.
In the accompanying Drawing our Invention is shewn as applied to a slide
rest lathe only, but this illustration will suffice to explain its application to
planing machines also. The Figure represents the lathe in cross section, for
the purpose of exhibiting the arrangement of the slides or contact surfaces of
the lathe bed and saddle.
A is the bed of the improved lathe; B, the saddle, which slides on the
bed A, and carries the tool holder C with its tool or cutter D.
On the same
side of the lathe bed as the cutting tool is a slide a, formed with a vertical
face, against which the vertical face of a slide 6 projecting down from the
under side of the saddle B works. The slide a is provided with an inclined
face a, against which the saddle also bears. This arrangement ensures the
preservation of close contact between the vertical faces of the slides a and b,
notwithstanding the wear of these rubbing surfaces. The back part of the.
sliding saddle is secured to the bed A by means of a plate c attached by screws
to the under side of the saddle, and overlapping a lip or rib projecting from
the side of the bed A. From this explanation it will be readily understood,
that the lateral thrust which is caused by the contact of the tool with the work
under operation, will be received by the slide a on its vertical face, and thus
the saddle will be prevented from yielding, even to any great excess of lateral
pressure.
When constructing planing machines according to this Invention, we make
the same provision on the under side of the traversing table as on the saddle
of the lathe for throwing the lateral thrust on the bed of the machine, and in
like manner we provide the planing machine bed with the means described
for receiving and sustaining that thrust.
Having now set forth the nature of our Invention of "Improvements in

page_text: the Construction of the Beds of Lathes and the Tables, of Planing Machines,"
and explained the manner of carrying the same into effect, we wish it to be
understood that under the above in part recited Letters Patent, we claim the
means herein-before described for enabling sliding saddles beds or tables to
resist the lateral thrust of planing and other cutting tools.
In witness whereof, I, the said John Batley, have hereunto set my
hand and seal, the Fourteenth day of May; in the year of our
Lord One thousand eight hundred and sixty.
Witness,
JOHN WAINWRIGHT,
Leeds.
JOHN BATLEY. (L.S.)