IMPROVEMENTS IN THE APPLICATION OR MODE OF AND APPARATUS FOR OPERATING ENDLESS BAND OR RING SAWS
Year: 1877

page_text: LETTERS PATENT to Allen Ransome, of Stanley Works, Chelsea, and John
Richards, of 10, John Street, Adelphi, Strand, both in the County of
Middlesex, Mechanical Engineers, for the Invention of "IMPROVEMENTS IN THE
APPLICATION OR MODE OF AND APPARATUS FOR OPERATING ENDLESS BAND
OR RING SAWS"
Sealed the 24th July 1877, and dated the 10th February 1877
PROVISIONAL SPECIFICATION left by the said Allen Ransome and John
Richards at the Office of the Commissioners of Patents on the 10th February
1877
ALLEN RANSOME, of Stanley Works, Chelsea, and Joux RICHARDS, of 10, John
Street, Adelphi, Strand, both in the County of Middlesex, Mechanical Engineers
IMPROVEMENTS IN THE APPLICATION OR MODE OF AND APPARATUS FOR OPERATING
ENDLESS BAND OR RING SAWS"
According to this Invention we operate an endless band or ring saw by function.
rollers or other gripping appliances, so as to cause the propulsion of the saw round a
centre disc or ing, and subjecting it to thrust or tension, or both, the required
curvature of the blade being maintained by means of adjustable guides arranged
near the material operated upon, and also as requied at other parts of the path of
the blade, the guides may be fitted with small friction rollers The material, oi the
table containing the material to be sawn, may be guided straight or otherwise by
suitable guides The Invention is particularly applicable to the cutting out of
pieces of a curved section by means of thin endless band oi ring saws
SPECIFICATION in pursuance of the conditions of the Letters Patent and of
an Order of the Loid Chancellor filed by the said Allen Ransome and John
Richards in the Great Seal Patent Office on the 16th August 1877
ALLEN RANSOME, of Stanley Works, Chelsea, and JOHN RICHARDS, of 10, John
Street, Adelphi, Strand, both in the County of Middlesex,, Mechanical Engineers
[Price +d]

page_text: "IMPROVEMENTS IN THE APPLICATION OR MODE OF AND APPARATUS FOR OPERATING
ENDLESS BAND OR RING SAWS"
According to this Invention we operate an endless band or ring saw by friction
rollers or other gripping appliances, so as to cause the propulsion of the saw round a
centie disc or ring, and subjecting it to thrust or tension, or both, the required
curvature of the blade being maintained by means of adjustable guides arranged
near the material operated upon, and also as required at other parts of the path of
the blade, the guides may be fitted with small friction 1ollers The material, or the
table containing the material to be sawn may be guided straight or otherwise by
suitable guides The Invention is particularly applicable to the cutting out of
pieces of a curved section by means of thin endless band or ring saws
Figure 1 is a front or edge view of a band or endless saw driven by a single
pair of friction rollers, and supported by external and internal stationary guides
according to our method
Figure 2 is a side view of a pair of friction driving rollers, and a partial view of
a band or endless saw, such as is employed in sawing staves for wooden casks
Similar letters of reference on the two Figures indicate corresponding parts
a, Figure 1, is a disc of metal, the diameter of which conesponds approximately
to that of the saw c, d, d, are two fiction rollers which embrace the saw blade, as
also seen in Figure 2, these rollers are both driven in opposite directions, and are
pressed together by springs or weights, so as to grip the saw fimly and force it forward
between the external guide b and the opposite internal guide e, preserving the
proper curvature to the point where the saw enters the material to be sawn, below
the material m another pair of similar guides b, c, embrace the saw and continue its
curvature or form The inside guides e, e, e, e, are made adjustable, so as to be set
out from the centre, and thus accommodate saws of slightly varying diameter, and
also in order that sonie tensile strain may be put upon the saw while it is passing
through the material The material to be sawn can be moved in a carriage, as
shown in Figure 1, or may be slid on a fixed bench as the size and weight may
requie or render most convenient In sawing pieces with a compound curve, such
as the staves of bulged casks, a cartage moving on curved ways is required
Instead of the lower internal guides e, e, supplementary fiction 1ollers may be
applied, these 1ollers may receive a positive motion for thrust or tension
And having thus described the nature of this Invention, and how the same is or
may be carried into effect, we declare that we clam, operating band or endless
saws by means of fiction applied on the sides of the blades in combination with
guides for duecting the saws and maintaining then curvature while cutting, as
described and as shewn
In witness whereof, I, the said Allen Ransome, for myself and on behalf of
the said John Richards, have hereunto set my hand and seal, this Tenth
day of August, an the year of our Loid One thousand eight hundred and
seventy-seven