IMPROVEMENTS IN BAND SAW Dublin, for the Invention MACHINES
Year: 1868

page_text: LETTERS PATENT to George Finnegan, of Upper Abbey Street,
the Invention of "IMPROVEMENTS IN BAND SAW
Dublin, for the Invention
MACHINES."
Sealed the 4th December 1868, and dated the 6th June 1868.
PROVISIONAL SPECIFICATION left by the said George Finnegan
at the Office of the Commissioners of Patents, with his Petition,
on the 6th June 1868.
I, GEORGE FINNEGAN, of Upper Abbey Street, Dublin, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN BAND.
SAW MACHINES," to be as follows :—
The Invention relates to an improved arrangement of band sawing
machine adapted more especially for the purpose of "opening" large
logs of round or square timber and of cutting them up into boards
and planks of any thickness desired.
Heretofore band saw machines have been so arranged that the saw
shall cut in vertical planes, by which arrangements it was necessary

page_text: when the band saw was strained around rollers mounted one above
another that the table or bench to which the timber was fixed should
either be cut through to allow the saw to pass from the upper to the
lower rollers, or that the timber to be cut should be fixed to the side
of a table or bench passing by the side and clear of the band saw;
or in cases where the band saw was strained around rollers mounted
side by side on vertical axes it was necessary to fixed the timber to
. a vertical table or bench mounted upon the frame of the machine
and caused to move past the saw in a vertical plane, and thus although
the endless saw in these cases travels horizontally the cutting edge
or teeth of the saw projecting upwards or downwards must necessarily
cut in a vertical direction.
Now my improvements consist in mounting the band saw upon two
rollers revolving on horizontal axes, the pullies or rollers being placed
on opposite sides of the machine and at the same level or elevation,
oue pulley being on each side of the travelling table which carries
the log. By this arrangement the endless saw as it passes from one
pulley to the other will not only travel horizontally, but will also cut
the timber in a lateral or horizontal direction. I mount the rollers
in suitable bearings, which are capable of sliding vertically in or upon
the standards or framing of the machine and of being fixed at any
.desired height therein so as to render them capable of adjustment to
the timber to be cut, which may be supported in any suitable manner,
but I prefer to fix it by "dogs" to a table provided with rollers
capable of running upon suitable rails, the centre of the table being
supported by rollers mounted upon fixed axes of motion, and I prefer
to give motion to such table or bench by means of a screw driven
by a cone pulley fixed thereon; and I give motion to the band saw
ras heretofore by a strap or band passing around a pulley fixed on the
axis of one of the drums or rollers around which the band saw is strained,
whilst I take up the slack of such driving strap or band-by means
of a weighted roller or other compensating motion, as is-well understood.
By these means I am enabled readily to adjust the, position of the
saw to the timber and to fix the latter to the top of a solid table
or bench capable of travelling in a horizontal plane whilst I am enabled
also to dispense with the cellar or space which is often required under-
neath band saw machines arranged as heretofore.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,.
filed by the said George Finnegan in the Great Seal Patent Office
on the 5th December 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
FINNEGAN, of Upper Abbey Street, Dublin, send greeting..
,
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Sixth day of June, in the year of our
Lord One thousand eight hundred and sixty-eight, in the thirty-first
year of Her reign, did, for Herself, Her heirs and successors, give-and
grant unto:
the said George Finnegan, Her special licence that
I, the said George Finnegan, my executors, administrators, and assigns,.
or such others as I,, the said George Finnegan, my executors, 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 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. BAND SAW
MACHINES," upon the condition (amongst others) that I, the said George
Finnegan, my executors or administrators; by an instrument in writing
under my, or their, or one of 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 calendar
months next and immediately after the date of the said Letters.
Patent.
NOW KNOW YE, that I, the said George Finnegan, do hereby
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 thereof, that is to say :--
""
This Invention relates to an improved arrangement of band sawing
machine adapted more especially for the purpose of "opening" large
logs of round or square timber and of cutting them up into boards and.
planks of any thickness desired..
Heretofore band saw machines have been so arranged that the saw.
shall cut in vertical planes, by which arrangement it was necessary

page_text: when the band saw was strained around rollers mounted one above
another that the table or bench to which the timber was fixed should
either be cut through to allow the saw to pass from the upper to the
lower roller, or that the timber to be cut should be fixed to the side
of a table or bench passing by the side and clear of the band saw;
or in cases where the band saw was strained around rollers mounted
side by side on vertical axes it was necessary to fix the timber to a
vertical table or bench mounted upon the frame of the machine and
caused to move past the saw in a vertical plane, and thus although
the endless saw in these cases travels horizontally the cutting edge
or teeth of the saw projecting upwards or downwards must necessarily
cut in a vertical direction.
[
Now my improvements consist in mounting the band saw upon two
rollers revolving on horizontal axes, the pulleys or rollers being placed
on opposite sides of the machine and at the same level or elevation,
one pulley being on each side of the travelling table which carries
the log. By this arrangement the endless saw as it passes from one
pulley to the other will not only travel horizontally but will also
cut the timber in a lateral or horizontal direction. I mount the rollers
in suitable bearings, which are capable of sliding vertically in or upon
the standards or framing of the machine and of being fixed at any
desired height therein so as to render them capable of adjustment to
the timber to be cut, which may be supported in any suitable manner,
but I prefer to fix it by "dogs" to a table provided with rollers capable
of running upon suitable rails; and I give motion to the band saw
as heretofore by a strap or band passing around a pulley fixed on the
axis of one of the drums or rollers around which the band saw is
strained, whilst I take up the slack of such driving strap or band by
means of a weighted roller or other compensating motion, as is well
understood. By these means I am enabled readily to adjust the position
of the saw to the timber and to fix the latter to the top of a solid
table or bench capable of travelling in a horizontal plane whilst I am
enabled also to dispense with the cellar or space which is often required
underneath band saw machines arranged as heretofore.
And in order that my Invention may be more fully understood and
readily carried into effect I will proceed, aided by the accompanying
Dismings mom fully to describe the same

page_text: Figure 1 is an elevation of a band saw machine constructed according
to my Invention; Figure 2 is a sectional plan of parts thercof taken at
the line 1, 1, Figure 1; and Figure 3 is a sectional plan of parts thereof
taken at the line 2, 2, of Figure 1.
a, a, is the band saw, which according to my Invention is mounted
upon rollers b, b, placed on opposite sides of the machine and mounted
on horizontal axes b', 6', so as to cause the saw to cut in
a horizontal
plane. The timber to be cut is supported upon the travelling bed or
table c, upon which it is fixed by "dogs," as will be well understood.
The axes 6, 6, are carried in bearings 6, 62, which are capable of sliding
upon V pieces d', d', formed on the standards or frames d, d. The
bearings 6, 6, are connected together by a cross bar or frame b³ having
two guides or supports b', ', fixed thereto to guide and support the
band saw a close up to its work. Motion is given to the band saw a
by means of a pulley 65 mounted on one of the axes 6' as usual, and I
adjust the saw to its work by means of screws e, e, taking into suitable
nuts formed in or carried by the bearings 62, 63, such screws e, e, being
geared together by bevilled pinions f¹, f', on the shaft or axis f taking
into bevilled pinions e¹, e¹, fixed on the upper ends of the screws c.
And in order to lower the saw I give motion to the screws e by means
of a hand wheel g' fixed on an axis g, which also carries a bevilled
pinion taking into a bevilled pinion e² fixed on the lower end of one
of the screws e; but when it is desired to raise the saw for the purpose
of fixing a fresh log to the bed or table c I give motion to the shaft
or axis g by means of a strap or band i, which by means of the
fork is shifted from the loose pulley to the fast pulley having
on its axis a toothed pinion which takes into and gives motion to a
toothed wheel fixed on the shaft or axis g.
If desired motion may be given to the bed or table c by means of a
screw driven by a strap or band passing around a cone pulley fixed
thereon, as referred to in my Provisional Specification, but if so provision
must be made to stop the motion of the bed or table c simultaneously
with the saw if from any cause the latter should cease running. The
mode however of giving motion to the bed c which I have found to
answer well is that shewn in the Drawings, of which the following is

page_text: a description:-The bed or table c is supported by rollers c capable of
running on fixed rails c², and on the under side of the bed or table c is
fixed a toothed rack which is taken into by and receives motion from
a toothed pinion ¹ fixed on the shaft or axis k, on one end of which
is fixed a toothed wheel driven by a toothed wheel fixed on one
end of the shaft or axis 1, the other end of which carries a bevilled
wheel which when the machine is in the act of sawing is driven
by a bevilled pinion m¹ keyed on the lower end of the shaft or axis m.
This shaft or axis m receives motion from a worm or screw 6 on one
of the shafts or axes 6¹ taking into a worm wheel m² keyed on the
shaft or axis m, and capable of rising and falling thereon by means
of a long keyway, as will be readily understood. But when it is
desired quickly to return the bed or table c for a fresh cut the bevilled
pinion m¹ is taken out of gear with the bevilled wheel by means of
the clutch lever m³ (shown in Figure 2), when the strap or band
is shifted off the loose pulley n* on to the driving pulley n¹ fixed on
one end of the hollow shaft or axis n³, the other end of which has
formed on or fixed thereto a bevilled pinion n³ which takes into and
gives motion to the bevilled wheel on the shaft or axis 1. Or if it
be desired to run the bed or table c quickly in, the opposite direction
then the driving strap or band is shifted on to the driving pulley n* fixed
on one end of the shaft or axis n' (passing through the hollow shaft n²),
the other end having fixed thereon the bevilled pinion no, which gives
motion to the bevilled pinion in the contrary direction. It will of
course be readily understood that when a quick speed is given to the
bed or table c in the direction for cutting the band saw will be raised
above the timber fixed on the bed or table c. And in order to change
the speed at which the bed or table c is driven for cutting I employ
change wheels of suitable sizes to take the places of the toothed wheels k
and ', as will be readily understood.
Having thus described the nature of my Invention, and the best mode
with which I am acquainted for carrying the same into effect, I would
have it understood that I make no claim to the various parts separately
considered, nor do I confine myself to the precise details herein shown
and described, as such may be varied without departing from the peculiar
character of my Invention; but what I do claim is, the mode of
arranging the parts of a band saw machine in such manner that the saw
is caused to cut in a horizontal "plane whilst the timber to be cut is fixed

page_text: to the upper surface of a travelling solid bed or table, substantially as
herein shown and described.
In witness whereof, I, the said George Finnegan, have hereunto
set my hand and seal, this Thirtieth day of November, in the
year of our Lord One thousand eight hundred and sixty-
eight.
Signed, sealed, and acknowledged
in presence of
FRANCIS MORGAN,
Sol.,
No. 35, Dawson Street,
Dublin.
GEORGE FINNEGAN. (L.S.)