In: PROVEMENTS IN MACHINERY FOR SAWING WOOD
Year: 1872

page_text: LETTERS PATENT to Charles Barlow, of 23, Southampton Buildings,
Chancery Lane, London, Patent Agent, for the Invention of "In:
PROVEMENTS IN MACHINERY FOR SAWING WOOD."A communication from
abroad by Walter R. Davies, of Louisville, Kentucky, United States:
of America.
Sealed the 22nd October 1872, and dated the 17th August 1872.
PROVISIONAL SPECIFICATION left by the said Charles Barlow at the
: Office of the Commissioners of Patents, with his Petition, on the
17th August 1872.
I, CHARLES BARLOW, of 23, Southampton Buildings, Chancery Lane,
London, Patent Agent, do hereby declare the nature of the said In-
vention for "IMPROVEMENTS IN MACHINERY FOR SAWING WOOD," a communi-
cation to me from abroad by Walter R. Davies, of Louisville, Kentucky,
United States of America, to be as follows:-
This Invention, as communicated to me, consists of novel arrange-
ments of machinery for sawing wood, whereby an oscillating and
reciprocating movement is given to the saw frame and saws. This:
"

page_text: reciprocating motion is given to the saw frame & saws by means of a
rack and pinion wheel actuated by a crank handle.
Sheet 1 of the annexed Drawing shows an elevation, and Figure 2 a
plan of the said machinery for sawing wood.
A represents the vertical supports or frame; b, the reciprocating saw
frame; C, the crank secured to the frame by the bracket K; D, the
saw table; e¹ is the rack, and E the pinion; I, shows a rope to which a
weight is attached, by means of which the saw frame is elevated. By
turning the crank rotary motion is given to the spur or pinion E', which
works in the rack e, thereby giving a reciprocating motion to the saw
frame.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Charles Barlow in the Great Scal Patent Office on
the 17th February 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
BARLOW, of 23, Southampton Buildings, Chancery Lane, London, Patent
Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventeenth day of August, in the year
of our Lord One thousand eight hundred and seventy-two, in the thirty-
sixth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said Charles Barlow, Her special licence
that I, the said Charles Barlow, my exccutors, administrators, and
assigns, or such others as I, the said Charles Barlow, my 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 WOOD," a communication to me from abroad by
Walter R. Davies, of Louisville, Kentucky, United States of America,
upon the condition (amongst others) that I, the said Charles Barlow,
my executors or administrators, by an instrument in writing under my,
or their, or one of their hands and seals, should particularly describe

page_text: 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
Scal Patent Office within six calendar months next and immediately
after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Charles Barlow, do liereby declare
the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by
the following statement:-
The said Invention relates to improvements in machinery for sawing
wood, intended more particularly for sawing planks into blocks to be
employed in paving streets or roadways, and consists in imparting to the
saw frame which carries the saws an oscillating or curved reciprocating
motion by means of a rack and pinion, in combination or not with a
counterbalance weight, or by any other suitable means.
And in order that the said Invention may be clearly understood, I
shall now proceed to fully describe the same, referring to the accom-
panying Sheet of Drawings, in which the same reference letters are
employed to indicate corresponding parts in all the Figures.
Fig. 1 is a front elevation of the improved sawing machine; Fig. 2 is
a corresponding side view of the same; and Figs. 3 and 4 represent
respectively a side and front elevation of the upper portion of the saw
frame drawn to a larger scale.
A is a strong wooden or other frame, provided at its upper end with
metal straps or bearings B, by which it is suspended, so as to be capable
of oscillating on journals formed on the overhead driving shaft C. This
shaft works in bearings D on the main framing E, and is fitted with a
driving pulley E', to which rotary motion is imparted from any suitable
prime mover. The saw spindle F which carries the circular saws G,
works in bearings H in the lower ends of the frame A.
In the Drawing the saw spindle is represented as fitted with 3 saws G,
but the number and distance apart of these saws will be varied to suit
the size of the blocks to be produced. The saws receive a rotary motion
from the driving shaft C by means of driving straps I, which pass over
pulleys Kx L, carried respectively on the driving shaft C, and on the
outer ends of the saw spindle F. The plank or balk of timber to be
sawn into blocks is fed up to the saws by means of a chain or a rack

page_text: and pinion motion, or otherwise, over the rollers M, carried in bearings
in the feeding table N. The plank being kept against the raised or
projecting part O to insure its being presented to the action of the saws.
in a perfectly straight direction. The size of the blocks to be sawn from
the plank is regulated by a stop P, which stop is made to project through
an opening in the saw bench Q by means of the lever R, to which the
stop P is attached. The plank to be cut is fed into the machine up to
the stop P, which is made to project above the surface of the saw bench
as the plank is being fed along the table N. The distance between the
stop P and that saw which is nearest thereto, determines the length of
the block to be sawn from the plan, the other two or more saws being
fixed on the spindle F at a corresponding distance from the first saw,
and from cach other by the collars S. The necessary pressure of the
saws against the plank to be cut into blocks is imparted by means of a
weight suspended at one end of the rope T, which rope is passed over
the ground over the grooved pulley U, and is attached at its opposite end
to the lower end of the saw frame. This weight is sufficiently heavy to
cause the saws whilst rotating to cut through the plank and sever there-
from two or more blocks at one operation, according to the number of
saws employed. The blocks after having been severed from the plank,
are removed from the saw bench, and the saws brought back in readiness
for the next cut by means of the pinions V keyed on the shaft W, working
in bearings in the brackets W', which pinions gear into the fixed rack X,
and are actuated by the crank bandles Y. The plank is then fed forward
until its end comes in contact with the stop P and the pinions thrown
out of gear or allowed to run freely on the rack, when the weight sus-
pended on the cord T will again cause the saws to come into action and
make another cut. This operation is repeated until the whole of the
plank is cut into the blocks, which will be of the required size, according
to the distance the saws are arranged from each other upon the spindle F.
If desired the cord and weight may be dispensed with, and the
necessary pressure imparted to the saws by means of the racks X and
pinions V.
In order to insure a parallel motion to the saws, guide rollers Z are
fitted to the saw frame, which rollers bear against the sides of the curved
racks X, and thereby prevent any lateral motion to the saw frame, and
thus prevent injury to the saws, and insure the blocks being drawn at a
right angle to the length of the plank.

page_text: If desired the saw bench may be made to rise and fall by means of a
treadle or other suitable contrivance in order to regulate the depth of
the cut according to the thickness of the plank to be cut into blocks.
B
Having now described the nature of the said Invention, and in what
manner the same is to be carried into practical effect, I wish it to bo.
distinctly understood that what is considered to be novel and therefore
desired to be claimed as new and useful is,―
1st. Imparting to the saw frame of sawing machines an oscillating
or reciprocating motion, substantially as herein-before described and
illustrated by the Drawings.
.
2nd. The application and uso of a rack and pinion, or racks and
pinions in combination or not with a counterbalance weight, for im-
parting an oscillating or reciprocating motion to the saw frame, sub-
stantially as and for the purpose herein-before described and illustrated
by the Drawings.
3rdly. The system or mode-of sawing planks or balks of wood into-
blocks, whereby two or more blocks are severed from the plank at one
operation, substantially as herein-before described and illustrated by the
Drawings.
-
In witness whereof, I, the said Charles Barlow, have hereunto set
my hand and seal, this Seventeenth day of February, in the year