A SAWING MACHINE UPON AN IMPROVED CONSTRUCTION
Year: 1811

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
BARTON, of Tufton Street, Westminster, in the County of Middlesex, Engineer,.
send greeting.
WHEREAS His most Excellent Majesty King George the Third, did, by
His Letters Patent under the Great Seal of the United Kingdom of Great
Britain and Ireland, bearing date at Westminster, the Ninth day of September,
in the fifty-first year of His reign, give and grant unto me, the said John
Barton, my exors, admors, and assigns, His especial licence, full power, sole
privilege and authority, that I, the said John Barton, my exors, admors, and
assigns, during the term of years therein mentioned, should and lawfully might
make, use, exercise, and vend, within England, Wales, and the Town of Berwick-
upon-Tweed, and also in all His Majesty's Colonies and Plantations abroad, my
Invention of "A SAWING MACHINE UPON AN IMPROVED CONSTRUCTION;" in which
said Letters Patent there is contained a proviso, that if I, the said John Barton,
shall not particularly describe and ascertain the nature of my said Invention,
and in what manner the same is to-be performed, by an instrument in writing
under my hand and seal, and cause the same to be enrolled in our High Court
of Chancery within six calendar months next and immediately after the date
of the said Letters Patent, that then the said Letters Patent, and all liberties
and advantages whatsoever thereby granted, shall utterly cease, determine, and
become void, as in and by the same, relation being thereunto had, may more
fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
John Barton, do hereby declare that the nature of my said Invention, and in

page_text: what manner the same is to be performed, are particularly described and ascer-
tained by the Drawings hereunto annexed, and the following description
thereof, and references thereto, that is to say:
The veneer saw as made as follows:-A broad plate of steel, very thick, and
ground out concave or otherwise (as shewn in Plate 2) to the teeth, and a
part may be left parallel to work steady between the guides that keep the saw
strait in the wood; close behind the guides, a back or stiffener, made concave or
otherwise suitable, is put by solder or any proper method, or the saw made in
the solid to this shape. On each edge of the log, fixed to the frame, are two
guides which the saw slides through, and on the back of the saw a guide is
fixed, which is to answer the purpose of keeping the saw steady, or give the saw
more or less wood, as this guide, as well as those on the front of the saw above
and below the log, are regulated by adjusting screws. The log or plank must
be kept firm against the roller or breast just before the saw on the other side
by leavers, pullies, and weights or springs, and kept up by a rack or screw
motion. The log moves forward by a rack or chain, or any common method.
Saws inay be used between two plates solidly fixed, and the saw move as a
slide, as in Plate 4. The method of cutting of plank or board is by circular
saws working above and below the timber, as shewn in Plate 5. Saws may be
used in a similar manner, as shewn in Plate 3, or they may be fixed at the
end of a segment by being made to a proper radius.
Fig. 1 A, the log; B, the frame; C, the saw; D, the parallel motion;
E, the crank; F, the roller on the end of the crank that lifts the lever G, which
by a catch turns the ratchet H, and turns the roller I, the teeth of which.
work in the holes of the rack J, and draw the log A forward just before the
saw is going to make the down stroke; G, the lever to lift the ratchet by the
catch; H, the ratchet on the same spindle as teeth, to draw the rack; I, the
teeth or pinion roller, to draw the rack; J, the rack going under the log, and
drawing from the other end; K, the spring, which has a hollow in front, in
which the pin L, by the side of the saw back, is forced by the oblique piece N
just before the saw is at the top; L, a pin by the side of the rack of the saw,
to hold the saw firm in the hollow of the spring K at the down stroke; M, an
oblique block, to force the saw forward before making the cut; N, another
oblique block, to throw the saw backward to go easy up; O, the roller, against
which the log passes, and is kept up by two rollers and weights.
Fig. 2: A, the side of the saw; B, the concave part of the saw, to reduce it
to a thin edge; C, the parallel or plain part, which slides 'between the guides,
which are fixed to the frame on each edge of the log; d, the back or stiffener;
D, this guide and another parallel with it at the other edge of the log are

page_text: screwed to the upright frame; e, two guides opposite on the other side of the
saw, which are screwed to the rails and regulated by screws F, through the
rails; F, regulating screws through the rails, to adjust guides; G, a guide at
the back of the saw, by which, by means of a screw through the rail, the saw
is more or less inclined to the log, as required; H, a roller, against which the
log passes.. The centre of this is just before the teeth of the saw.
The log
must be kept firm against this roller with the pressure on the other side the
log.
Fig. 3 A, the log or plank; B, the frame; C, the saw; D, two guides at
top and 'two at bottom, to keep the saw in a parallel line; E, E, connecting
rods, to keep the saw steady to its cut; F, connecting rod to the wheel'G, by
which the machine is drove from 'the first power. N.B.-This plan is best
for the saw to be thrown backward, and shewn in Figure 1.
Fig. 4 A, the log; B, the saw. These teeth must be set on one side, for
the saw, to have a proper inclination. C, C, the fencers to guide the saw, which
are adjusted by screws, so that the saw may work close, yet free; D, rollers on
which the log goes forward; E, frame to tighten the saw, which is done by the
screw L;, F, the connection by which the ratchet G is moved at each stroke
of the saw; G, the ratchet; II, the spiral worm, on the same spindle as the
ratchet; I, the wheel, with oblique cogs, driven by the spiral worm H; J, the
wheel, with teeth, on the same spindle as the wheel I, the teeth are made to
fit the links of the chain L, in any of which links a hook may be fixed, to hook
on behind the log to draw it forward; K, rollers, over which the chain passes
to keep it out of the way of this log; L, the veneer, partly cut off.
Figure 5: A, the wheel or first power; B, rope, chain, or strap, to drive the
saws; C, C, the saws, one spindle may drive the other by pinions on the
same spindles as the saws; D, D, pullies, on same spindles as the saws; E, E,
pullies, with different sized grooves, to bring the log slower or faster, as may be
required; F, F, a wheel, with bevel teeth on the same shaft as the roller F,
which, as it turns, draws the wood forward, being pressed between this roller
and the roller G, by means of the weight L; G, the pressure roller, which
turns on the fulcrum M; H, the band, which drives the pulley E, and on the
same spindle is the spiral worm K, to drive the wheel F; this band fits either
of these grooves, as the pullies D and E are of a size, only put reverse ways;
I, adjusting screws, to make the saws range to meet each other in the middle
of the log; J, the spindle; K, the spiral worm; L, the weight; M, the
fulcrum of lever G; N, the log or deal, on the end of which is marked the
radius of the saw corf. The size of the machine must depend upon the

page_text: Inrolled the Seventh day of March, in the year of our Lord One. thousand
eight hundred and twelve.