IMPROVEMENTS IN MACHINERY FOR SAWING AND CUTTING METAL
Year: 1874

page_text: LETTERS PATENT to William Craven, of the Vauxhall Ironworks,
Manchester, in the County of Lancaster, and Carl Bollé, of
Manchester, aforesaid, Engineers, for the Invention of "IMPROVE-
PROVISIONAL SPECIFICATION left by the said William Craven and
Carl Bollé at the Office of the Commissioners of Patents, with their
Petition, on the 16th December 1874.
We, WILLIAM CRAVEN, of the Vauxhall Ironworks, Manchester, in
the County of Lancaster, and CARL BOLLÉ, of Manchester, aforesaid,
Engineers, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN MACHINERY FOR SAWING AND CUTTING METAL," to be as
follows:-
-
Our improved machinery consists of a vertical or other saw, which is
moved up and down or to and fro by means of a crank pin in a disc
acting on a lever, which is connected by a link to the saw frame; tho
angle of the saw blade can be regulated by set screws, so that each tooth
of the saw may act in succession on the metal to be sawn.

page_text: The article to be operated upon is fixed on a sliding table which is
moved towards the saw by a grooved cam acting on a lever which
is connected to a ratchet wheel on the screw of the slide. In some cases
a cross slide is also used, which cross slide must be actuated by a ratchet
wheel and screw. The saw blade is connected to square or polygonal
blocks, and can be set to the angle required.
The machinery for giving the to-and-fro motion to the saw and the
other details may be varied.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Craven and Carl Bollé in the Great Seal
Patent Office on the 12th June 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, WILLIAM
CRAVEN, of the Vauxhall Ironworks, in the County of Lancaster, and
CARL BOLLÉ, of Manchester, aforesaid, Engineers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Sixteenth day of December, in the year
of our Lord One thousand eight hundred and seventy-four, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto us, the said William Craven and Carl Bollé,
Her special licence that we, the said William Craven and Carl Bollé, our
executors, administrators, and assigns, or such others as we, the said
William Craven and Carl Bollé, 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 Islands, and Isle of
Man, an Invention for "IMPROVEMENTS IN MACHINERY FOR SAWING AND
CUTTING METAL," upon the condition (amongst others) that we, the said
William Craven and Carl Bollé, our executors or administrators, by an
instrument in writing under our, or their, or one of our or 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

page_text: calendar months next and immediately after the date of the said Letters
Patent.
NOW KNOW YE, that we, the said William Craven and Carl Bollé, 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 (that is to say) :-
Our improved machinery consists of a vertical or other saw, which is
moved up and down or to and fro by means of a crank pin in a disc
acting on a lever, which is connected by a link to the saw frame; the
angle of the saw blade can be regulated by set screws, so that each tooth
of the saw may act in succession on the metal to be sawn.
The article to be operated upon is fixed on a sliding table, which is
moved towards the saw by a grooved cam acting on a lever which is
connected to a ratchet wheel on the screw of the slide. In some cases a
cross slide is also used, which cross slide must be actuated by a ratchet
wheel and screw. The saw blade is connected to square or polygonal
blocks and can be set to the angle required.
The machinery for giving the to-and-fro motion to the saw and the
other details may be varied.
And in order that our Invention may be fully understood and readily.
carried into operation, we will proceed to describe the accompanying
Sheet of Drawings, reference being had to the figures and letters marked
thereon.
Fig. 1 is a front view, and Fig. 2 a side view of our improved
machinery for sawing and cutting metal.
a is the driving shaft on which is the pinion a¹ gearing into the
wheel b, in the face of which is the crank pin b' taking into the sliding
block c² of the slotted lever c. The end of this lever is connected by the
link d to the frame e in which the saw blade f is secured. The frame e
is connected to the slide e³ by two bolts; the lower one forms the fulcrum
on which the frame can be moved forward for the purpose of varying the
angle of the saw blade; the ends of the saw blade are fixed to the square
or polygonal blocks f¹, fitting into corresponding holes in the frame e, to
enable the saw blade to be set so as to cut in any direction. We wish
to remark here that two or more saw blades may be secured to the
frame e.
The angle of the saw blade can be regulated by the set

page_text: WILLIAM CRAVEN. (L.s.)
CARL BOLLÉ.
(L.S.)