IMPROVEMENTS IN BAND SAW MACHINES
Year: 1881

page_text: LETTERS PATENT to Alfred Dodman, of Highgate Foundry, King's Lynn, in
the County of Norfolk, Engineer, and Nathan Gold Kimberley, of Stoke.
Newington, London, in the County of Middlesex, Engineer, for an Invention
of "IMPROVEMENTS IN BAND SAW MACHINES."
PROVISIONAL SPECIFICATION left by the said Alfred Dodman and Nathan
Gold Kimberley at the Office of the Commissioners of Patents on the 12th July
1881.
ALFRED DODMAN, of Highgate Foundry, King's Lynn, in the County of Norfolk,
Engineer, and NATHAN GOLD KIMBERLEY, of Stoke Newington, London, in the
County of Middlesex, Engineer. "IMPROVEMENTS IN BAND SAW MACHINES."
Our Invention relates, firstly, to improved mechanism or apparatus whereby we
are enabled to alter and control the cutting angle of the saw in band saw machines
without having to alter the position of the table on which the material being sawn
is placed. The said Invention relates, secondly, to devices or appliances to be used
in combination with the said improved mechanism to adapt the machine to saw
out pieces of circular form or shape. The said Invention relates, thirdly, to
improved mechanism and arrangements whereby we are enabled, in conjunction
with a template or pattern, to control the position of the material as it passes
under the action of the saw so as to saw out pieces with curved or other forms
capable of being produced from a template. In carrying the first part of our Invention
into practice, we mount the pulleys which are above and below the table, and over
which the saw travels, upon spindles attached to a radial piece or quadrant which
may be held and slide in a radial groove in the supporting frame. The position
of the said radial piece or quadrant carrying these pulleys may be altered, con-
trolled, and determined by forming on the said quadrant a rack with which a
pinion supported in the frame of the machine gears. Or other suitable means may
be employed for altering the position of the said quadrant according to the angle
it is desired the saw shall operate. The arc of the radial piece or quadrant, and
the groove in which it slides should be struck from a centre at that point above

page_text: the table at which the saw operates. The band saw is carried around the aforesaid
adjustable pulleys and over a driving pulley supported in suitable bearings on the
frame of the machine, and by the adjustment of the quadrant the angle at which
the said saw operates can be varied to any desired degree without any alteration
in the position of the table upon which the work rests. In carrying the second
part of our Invention into practice, the material to be operated upon is held
between centres which are supported by suitable arms or appliances attached to
or sliding in a groove or grooves formed in the table of the machine. The size of
the circle or the radius at which the material is sawn can be regulated by the
adjustment of the aforesaid centres nearer to or farther from the point in the table
at which the saw acts. In carrying the third part of our Invention into practice,
we fix the template or pattern on a slide which works in a groove in the table of
the machine. The shape or form of this template or pattern is communicated
through a guide fixed on cross slides and working in grooves in the said table to
the material under operation. This material is held on another slide working in a
groove on the ends of the cross slides, and connected to the slide carrying the
template to ensure an equal rate of travel of the template and the material under
operation. The guide is held up to the template or pattern by a spring or weight.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Alfred Dodman and Nathan Gold Kimberley in the Great Seal
Patent Office on the 11th January 1882.
ALFRED DODMAN, of Highgate Foundry, King's Lynn, in the County of Norfolk,
Engineer, and NATHAN GOLD KIMBERLEY, of Stoke Newington, in the County
of Middlesex. "IMPROVEMENTS IN BAND SAW MACHINES."
Our Invention relates, firstly, to improved mechanism or apparatus whereby we
are enabled to alter and control the cutting angle of the saw in band saw machines
without having to alter the position of the table on which the material being sawn
is placed.
The said Invention relates, secondly, to devices or appliances to be used in
combination with the said improved mechanism to adapt the machine to saw out
pieces of circular form or shape.
The said Invention relates, thirdly, to improved mechanism and arrangements
whereby we are able, in conjunction with a template or pattern, to control the
position of the material as it passes under the action of the saw so as to saw out
pieces with curved or other forms capable of being produced from a template.
In carrying the first part of our Invention into practice, we mount the pulleys
which are above and below the table, and over which the saw travels, upon spindles
attached to a radial piece or quadrant which may be arranged to slido and be held
in a radial groove in the supporting frame.
The position of the said radial piece or quadrant carrying these pulleys may be
altered, controlled, and determined by forming on the said quadrant a rack with
which a pinion supported in the frame of the machine gears, or other suitable
means may be employed for altering the position of the said quadrant according to
the angle at which it is desired the saw shall operate.
The arc of the radial piece or quadrant, and the groove in which it slides should
be struck from a centre at that point above the table at which the saw operates.
The band saw is carried around the aforesaid adjustable pulleys and over a driving
pulley supported in suitable bearings on the frame of the machine, and by the
adjustment of the quadrant the angle at which the said saw operates can be varied
to any desired degree without necessitating any alteration in the position of the
table upon which the work rests.
In carrying the second part of our Invention into practice, the material to be
operated upon is held between centres which are supported by suitable arms or
appliances attached to or sliding in a groove or grooves formed in the table of the
machine. The size of the circle or the radius at which the material is sawn can
be regulated by the adjustment of the aforesaid centres nearer to or further from
the point in the table at which the saw acts.
In carrying the third part of our Invention into practice, we fix the template or
pattern on a slide which works in a groove in the table of the machine. The
shape or form of this template or pattern is communicated through a guide fixed on
cross slides and working in grooves in the said table to the material under opera-
tion. This material is held on another slide working in a groove on the ends of
the cross slides and connected to the slide carrying the template to ensure an equal
rate of travel of the template and the material under operation.
The guide is held up to the template or pattern by a spring or weight.
The first part of our Invention is illustrated in side elevation in Figure 1 of the
Drawings.
In carrying this part of our Invention into practice, we mount the pulleys A, A³,
which are above and below the table and over which the saw B travels, upon
spindles attached to a radial piece or quadrant C, which is arranged to slide and be
held in a radial groove in the supporting frame D.
The position of the said radial piece or quadrant C carrying these pulloys may

page_text: be altered, controlled, and determined by forming on the said quadrant C a rack
with which a pinion E supported in the frame of the machine gears, or other
suitable means may be employed for altering the position of the said quadrant
according to the angle at which it is desired the saw B shall operate.
The arc of the radial piece or quadrant C, and the groove in which it slides,
should be struck from a centre at that point above the table F, at which the saw B
operates. The band saw B is carried around the aforesaid adjustable pulleys a, a²,
and over a driving pulley G supported in suitable bearings on the frame D of the
machine, and by the adjustment of the aforesaid quadrant C, the angle at which
the said saw B operates can be varied to any desired degree without necessitating
any alteration in the position of the table F upon which the work rests.
The second part of our Invention is illustrated in plan and side view in Figures
and 3.
1
In carrying this part of our Invention into practice, the material H to be
operated upon is held between centres i, i, which are supported by suitable
arms J, J, or other appliances attached to or sliding in a groove or grooves formed
in the table F of the machine. The size of the circle or the radius at which the
material is sawn can be regulated by the adjustment of the aforesaid centres i, i,
nearer to or farther from the point in the table F at which the saw B acts.
The third part of our Invention is illustrated in plan and transverse section in
Figures 4 and 5 of the Drawings.
In carrying this part of our Invention into practice, we fix the template or
pattern K on a slide 4, which works in a groove in the table F of the machine.
The shape or form of this template or pattern K is communicated through a
guide M fixed on cross slides N, N, and working in grooves in the said table F
to the material O under operation. This material is held on another slide P
working in a groove on the ends of the cross slides N, N, and connected to the
slide 4, carrying the template K to ensure an equal rate of travel of the template K
and the material O under operation.
Having thus fully described our said Invention, and shewn how the same may
be conveniently and advantageously carried into practice, we wish it understood
that we claim,—
*
First. The improved mechanism or apparatus whereby we are enabled to alter
and control the cutting angle of the saw in a band sawing machine without having
to alter the position of the table on which the material being sawn rests, substan-
tially as herein set forth.
Second. The combination with the said mechanism or apparatus of the devices
for enabling pieces of circular form or shape to be sawn on the machine, as above
set forth.
Third. The improved mechanism or devices whereby we are enabled to saw out
pieces with curved or other forms capable of being produced from a template,
substantially as above set forth with reference to Figures 4 and 5 of the Drawings.
In witness whereof, I, the said Nathan Gold Kimberley, for myself and on
behalf of the said Alfred Dodman, have hereunto set my hand and seal,
this Eleventh day of January, in the year of our Lord One thousand eight
hundred and eighty two.
N. G. KIMBERLEY.
(L.S.)