IMPROVEMENTS IN ENDLESS BAND SAW MACHINES to be as follows:
Year: 1885

page_text: I, JOHN WATTS of Broadweir Engine Works in the City and County of Bristol
Engineer do hereby declare the nature of said Invention for "IMPROVEMENTS IN
ENDLESS BAND SAW MACHINES to be as follows: —
"
My Invention refers more especially to machines of the type described in the
Specification of Patent N° 612 dated 15th February 1879 granted to Hector
Aylesbury and has for its object to provide means for perfecting the action of such
machines but my said Invention is applicable also in part to band saw machines
generally.
In order to ensure a straight cut of the band saw I provide rollers or guide
pulleys fixed in such a position that they deflect the band saw out of the direct
line from the main carrying pulley above to the main carrying pulley below and
form supports for giving rigidity to the portion of the band saw which is for the
time engaged in, cutting I make the upper of the aforesaid guide pulleys or rollers
or the upper of each of the sets of guide pulleys or rollers in a machine having
more than one saw capable of adjustment laterally independently of the roller or
rollers below the table and I make the packing boxes through which the saws pass
from the material being cut also capable of independent adjustment laterally in
their supports beneath the table whereby I can obtain a perfectly parallel cut by
the said saws.
In order to give a parallelism of the cuts made by the saws when
two saws act in the same machine I make the portion of the fence or bearing
surface against which the material bears in its passage from one saw to the other
at an angle so that the portion of the said fence or bearing presents an inclined face
for the material to bear against which at the part where the second saw commences
to act is situated nearer to the saw than is the portion of the fence or bearing
opposite to the first saw a distance equal to the width of the gap in the material
made by the first saw whereby the gap is closed as the material proceeds to the
second saw which therefore can make a cut perfectly parallel with the cut previously
made by the first saw.
T
1007

page_text: I, JOHN WATTS, of Broadweir Engine Works in the City and County of Bristol,
Engineer, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
My Invention refers more especially to machines of the type described in the
Specification of Patent No 612 dated 15th February 1879 granted to Hector
Aylesbury and has for its object to provide means for perfecting the action of such
machines, but my said Invention is applicable also in part to band saw machines
generally.
In order to ensure a straight cut of the band saw I provide "rollers or guide
pulleys fixed in such a position that they deflect the band saw out of the direct
line from the main carrying pulley above to the main carrying pulley below and
form supports for giving rigidity to the portion of the band saw which is for the
time engaged in cutting I make one or both of the aforesaid guide pulleys in a
machine having one saw or each of the sets of guide pulleys or rollers in a machine
having more than one saw capable of adjustment laterally but I prefer to make
only the upper one or ones adjustable independently of the roller or rollers below
the table and I make the packing boxes through which the saws pass from the
material being cut also capable of independent adjustinent laterally in their
supports beneath the table whereby I can obtain a perfectly parallel cut by the
said saws.
And in order that my said Invention may be fully understood I shall now
proceed more particularly to describe the same and for that purpose shall refer to
the several figures on the annexed sheets of drawings the same letters of reference
indicating corresponding parts in all the figures.
Figures 1 and 2 of the accompanying Drawings are elevations at opposite sides
of the machine and Figure 3 is an end elevation of so much of a machine as is
necessary to illustrate the application thereto of all the improvements according to
my Invention Figure 4 is a sectional view of a part of the machine drawn to a
larger scale shewing the details of mechanism which may be used for adjusting the
guide pulleys or rollers Figure 5 is a section on the line 1.2 Figure 4 and Figure 6
is in section on the line 3. 4 Figure 4. Figure 7 is a plan of the table shewing a
convenient mechanism for adjusting the packing boxes Figure 8 is a section
through the line 5. 6 Figure 7 and Figure 9 is a section through the line 7. 8.
Figure 7.
The drawing illustrates a double band saw machine of the Aylesbury type but it
is to be understood that as before stated my Invention is not limited to application
to that type of machine.
J
AB are the main carrying pulleys above and below the table over which the
saws C pass. D are guide pulleys or rollers mounted in such a position that they
deflect each saw C out of the direct line from the main carrying pulley above to
the main carrying pulley below the table E and form supports for giving rigidity
to the portion of the saw which for the time being is engaged in cutting The

page_text: upper guide pulleys or rollers D are mounted in sliders e capable of being adjusted
transversely (in vertically adjustable carriers) to the line of travel of the saw by
means of the screw g upon which runs a nut h on the slider c. i are screws by
which the slider is fixed in the position 'to which it has been brought. In
proximity to the guide pulleys or rollers D above the table and carried by the
same slider is a roller k and a block of wood or the like forming with the
pulley D a guide for the saw and constituting the upper packing box but this
packing box may be carried from the framing in the ordinary way if desired but
in that case it should be laterally adjustable so that its position relatively with
the pulley can be properly fixed. Each of the packing boxes in the table (through
which the saws pass as they leave the material) is provided with adjustable side
cheek pieces m with bearing surfaces of wood or the like and having screw nuts
formed therein with which engage the screws n capable of being rotated but not
of moving longitudinally by which screws the cheek pieces can be adjusted laterally
relatively to the guide pulleys or rollers and relatively to each other as described.
It will be understood that in a single saw machine the arrangement here illustrated
for each saw may be used in substantially the same manner for the one saw and
that the Invention is not limited to adaptation to any particular number of saws
in a machine-In the Drawing I have shewn the packing box for the second saw
as being carried by a bracket on the adjustable slider which carries the guide
roller for that saw beneath the table but in all cases the adjustable packing boxes
can be mounted in any suitable way.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I delare that what
I claim is
First. In band saw machines the combination with the saw in single saw
machines, or with both or all the saws in machines with more than one saw, of
guides pulleys or rollers so arranged that they steady the cutting portion or
portions of the saw or saws by deflecting it or them from the direct line between
the main carrying pulleys, of means for adjusting and fixing the said guides,
pulleys, or rollers above the table or those below the table, or both those above and
below the table, and a packing box or packing boxes below the table adjustable
relatively to the guide pulley or pulleys below the table substantially as herein-
before described.
Second. In band saw machines the combination with the saw or with each saw
in a machine, of means for deflecting and steadying the cutting portion or portions
of the saw or saws, of means for adjusting the said first mentioned means, and of
adjustable packing box or boxes beneath the table or support for the material
being operated upon all substantially as hereinbefore described.
Third. In double band saw machines of the Aylesbury type the arrangements
and combination of parts all as herein before described and illustrated in the
accompanying drawings.
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