IMPROVEMENTS IN MACHINERY FOR SAWING WOOD
Year: 1873

page_text: LETTERS PATENT to John Robinson, of Rochdale, in the County of
Lancaster, Engineer, and John Smith, of the same Place, Engineer,
for the Invention of " IMPROVEMENTS IN MACHINERY FOR SAWING WOOD."
Scaled the 10th August 1873, and dated the 22nd February 1873.
PROVISIONAL SPECIFICATION left by the said John Robinson and
John Smith at the Office of the Commissioners of Patents, with
their Petition, on the 22nd February 1878.
We, JOHN ROBINSON, of Rochdale, in the County of Lancaster,
Engineer, and JOHN SMITH, of the same Place, Engincor, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN MACHINERY
FOR SAWING WOOD," to be as follows:-
Our Invention relates to those machines which are commonly called
board cutting machines, and consists in a method of mounting the saw
and saws thereon. For this purpose we provide the machine with guides,
within which are slides having pins projecting therefrom, and upon these
we place arms connected together on one side by the saw or saws, and
on the other by a tio rod, there being also a contral bar; these parts

page_text: therefore form a frame complete in itself, and carried by the aforesaid
pins and from which it may be removed at pleasure.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Robinson and John Smith, in the Great
Seal Patent Office on the 22nd August 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, John
ROBINSON, of Rochdale, in the County of Lancaster, Engineer, and
JOHN SMITH, of the same Place, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-second day of February, in the
year of our Lord One thousand eight hundred and seventy-three, in
the thirty-seventh year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto us, the said John Robinson and John
Smith, Her special license that we, the said John Robinson and John
Smith, our executors, administrators, and assigns, or such others as
we, the said John Robinson and John Smith, 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 thercin expressed,
should and lawfully might make, usc, 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
WOOD," upon the condition, amongst others, that we, the said John
Robinson and John Smith, by an instrument in writing under our
hands and seals, or under the hand and seal of one of us, should par-
ticularly describe and ascertain the nature of the said Invention, and in
what manner the same was to be performed, and cause the same to bo
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 Smith, do hereby declare the
nature of our said Invention, and in what manner the same is to bo

page_text: performed, to be particularly described and ascertained in and by the
following statement and accompanying Drawing, that is to say :—;
Our Invention relates to what are commonly called board cutting
machines, and consists in a method of mounting the saw or saws thereon.
For this purpose wo provide the machino with guides, within which aro
slides having pins projecting therefrom, and upon these wo place arms
connected together on one side by the saw or saws, and on the other by
a tio rod or rods, there being also a central bar; these parts thereforo
form a frame complete in itself, and carried by the aforesaid pins, and
from which it may be removed at pleasure."
When the saw or saws are to bo tightened, the arms being capable of
turning upon centres do not cause a binding effect upon the slides.
In the accompanying Drawing, Fig. 1 represents, a portion of a saw
frame constructed according to our Invention in front elevation, Fig. 2
a plan view, and Fig. 8 a detached viow of certain parts upon an
enlarged scale.
Ať is a portion of the framework of the machine provided with '
screws 6 and bovil gearing d, for the purpose of raising or lowering the
framo e, which carrios the saw or saws as usual. This frame is pro-'
vided with guido f for the reception of slides g, g', through which thero
pass pins, A, which also pass through arms i, , and a rod k, by which
means the two slides g, g', are connected together. To ono sido of tho
arms i,, is adapted the saw 7 by means of tightening scrows m in the
usual manner, and on the other sido the said arms are provided with a
tie rod » capable of being drawn or loosened by nuts o. To the slide g
is jointed the connecting rod p, by means of which the reciprocating
motion is given to the two slides, and consequently to the saw 2.
When it is desired to tighten the saw, it is done in the usual manner
by means of the nuts m, o, but according to the ordinary arrangement
of these saw frames, this operation might produce a twisting effect upon
the slides, and cause them to bind within their guides; but according to
our Invention the arms i, &, are capable of turning upon their centros
h, h', and the tension is divided between the saw / and the tie rod n, in
consequence of which the slides g, g', are not diverted from their true
position.
The contro pins h, h³, aro shown in Fig. 3 with circular heads
extending into the slidos 9, 9',; this is for the purpose of allowing a

page_text: slight swaying motion of the saw, but that as is well known is necessary
in this class of machines, and does not constitute any part of our Inven-
tion.
In the above description I have alluded to one saw only, but two or
more may be used on the same principle, so as to cut several boards at |
the same time.
Having thus described and ascertained the nature of our said Inven-
tion, and the manner in which the same is to be performed, I desire it to
be understood that we claim as secured to us under the above in part
recited Letters Patent, and for the purpose above set forth, the use of
the arms illustrated at 9,9³, capable of turning upon centres and carrying
the saw or saws and tie rod or rods.
In witness whercof, I, the said John Smith, have hereunto set
my hand and scal, this Twenty-first day of August, in the year
of our Lord One thousand eight hundred and seventy-three.
TOWN SMITH (7.0)