IMPROVEMENTS IN CHAFF CUTTING MACHINES
Year: 1876

page_text: LETTERS PATENT to Thomas Allcock, of Ratcliffe-on-Trent, in the County of
Nottingham, for the Invention of "IMPROVEMENTS IN CHAFF CUTTING
MACHINES."
PROVISIONAL SPECIFICATION left by the said Thomas Allcock at the Office
of the Commissioners of Patents on the 22nd June 1876.
" IM-
THOMAS ALLCOCK, of Ratcliffe-on-Trent, in the County of Nottingham.
PROVEMENTS IN CHAFF CUTTING MACHINES."
I connect two levers to the reversing gear of the chaff cutter; these levers carry
a guard roller, which lies across the feed box; this roller revolves upon the material
that is being cut, and in case the hand of the attendant gets between the rollers the
guard roller rises with the levers, and reverses the machine, thus forming an
effectual guard from injury.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said Thomas Allcock in the Great Seal Patent Office on the 21st December
1876.
THOMAS ALLCOCK, of Ratcliffe-on-Trent, in the County of Nottingham. “IM-
PROVEMENTS IN CHAFF CUTTING MACHINES."
I connect two levers to the reversing gear of the chaff cutter; these levers carry
a guard roller, which lies across the feed box; this roller revolves upon the material
that is being out, and in case the hand of the attendant gets between the rollers the
guard roller rises with the levers and reverses the machine, thus forming an effectual
guard from injury.
In order that my said Invention may be most fully understood, and readily
carried into effect, I will proceed to describe the Drawings hereunto annexed.

page_text: L
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a side elevation; Figure 2 is a back elevation; and Figure 3 is a
plan of a portion of a chaff cutting machine to which my improvements are applied.
a is the trough, into which the straw or materials to be cut are placed; b and c
are the two feed rollers; they are geared together as is usual, and the upper roller
is driven by spur gear from the shaft d, which has upon it the bevelled wheel e; fis
the main driving shaft of the machine, carrying the fly wheel and knives; it has
also upon it the bevelled pinions g, g, which both engage with the bevelled wheel e
between the pinions; g is the sliding clutch h, which by means of a groove and
feather is compelled to turn with the shaft; i is a lever; it is shown separately in
Figures 4 and 5.
Figure 4 is a front, and Figure 5 a side elevation; it extends entirely across
the trough a, to the sides of which it is pivotted at i, i; it also carries the roller k.
The lever is prolonged on one side, and has a pin upon it which enters an annular
groove in the clutch h. Thus it will be seen that should the hand or arm of the
workman or any other obstruction get beneath the roller k it will carry the roller
on with it, and the movement of the lever i which results will cause the clutch h to
be slidden along the shaft f, and in this way one of the pinions g is taken out, and
the other put into gear with the bevelled wheel e, from which it results that the
motion of the feed rollers is reversed, and the obstruction then can be readily
removed.
Having thus described the nature of my said Invention, and the manner of per-
forming the same, I would have it understood that I claim, the construction of
chaff cutting machines in such manner that in case of obstruction the motion of the
feed rollers is self-reversing, substantially as described.
In witness whereof, I, the said Thomas Allcock, have hereunto set my hand
and seal, this 20th day of December, in the year of our Lord One thousand
eight hundred and seventy-six.
T. ALLCOCK.
(L.S.)