IMPROVEMENTS IN THE CONSTRUCTION OF ROOT PULPERS
Year: 1874

page_text: PROVISIONAL SPECIFICATION left by the said Edward Hammond
Bentall at the Office of the Commissioners of Patents, with his
Petition, on the 26th February 1874.
I, EDWARD HAMMOND, BENTALL, of Heybridge, near Maldon, in the
5 County of Essex, Agricultural Implement Maker, do hereby declaro the
a nature of the said Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF
ROOT PULPERS," to be as follows:-
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The object of this Invention is to simplify the construction and
increase the efficiency of root.pulpers.

page_text: This barrel I form with open ends, and cast it with forked arms at about
the middle of its length to carry the boss. Instead of flat steel blades I
apply to the barrel blades mado of corrugated sheet steel. The barrel
I cast with tangential slots through its periphery, and the tangential
side of each slot may be corrugated to form a backing or support for the
knives. The cutting edge of the knives is chamfered and projects
beyond the periphery of the barrel just so far as will enable it to act
upon the roots like a series of gouges, and slice or scrape off strips of the
roots.
The knives may be rivetted to the barrel or they may be slotted to
receive screws, which will hold them fast thereto and permit of their
adjustment outwards as the cutting edges wear away. In fixing these
knives on the barrel they are so arranged with respect to each other that
the corrugations of the one knife will be out of line of the corrugations
of the following knives. Thus supposing the centres of the corrugations
to be an inch apart, and that four knives constituto a group, these
knives will be set so as to give each corrugation a lateral lead of a
quarter of an inch with respect to those of the next succeeding knife.
The sides of the case in which the barrel is mounted are provided with
segment shaped guards, which overlie the ends of the knives and prevent
any pieces of the roots from escaping in that direction. When applying
these knives to disc pulpers I propose to arrange them either radially
tangentially, and to support them in the slotted disc and adjust them
with respect to each other in substantially the same manner as in the
barrel pulper. In each case the knives may be changed for others of a
coarser or finer corrugation to provide for the roots being shredded into
strips of the required size.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Edward Hammond Bentall in the Great Seal Patent
Office on the 26th August 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWARD
HAMMOND BENTALL, of Heybridge, near Maldon, in the County of
Essex, Agricultural Implement Maker, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-sixth day of February, in the year

page_text: of our Lord One thousand eight hundred and seventy-four, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Edward Hammond Bentall, Her special
licence that I, the said Edward Hammond Bentall, my executors, admi-
nistrators, and assigns, or such others as I, the said Edward Hammond
Bentall, my executors, administrators, 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 THE CONSTRUCTION OF ROOT PULPERS," upon the
condition (amongst others) that I, the said Edward Hammond
Bentall, my exccutors 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 Edward Hammond Bentall, do hereby
declare the nature of my said Invention, and in what manner the
samo is to be performed, to be particularly described and ascertained
in and by the following statement, reference being had to the Drawing
hereunto annexed, and to the letters and figures marked thereon (that
is to say) :-
The object of this Invention is to simplify the construction and
increase the efficiency of root pulpers.
The Invention applies both to barrel and disc pulpers.
In the accompanying Drawings Fig. 1, Sheet I., shews in longitudinal
section a barrel pulper constructed according to my Invention, and
Fig. 2, Sheet II., shews in plan view the barrel of the pulper detached
from its case; Figures 3, 3ª, and 3º are plan, edge, and end views of the
kind of knife which I employ. The case, the feeding tray, and stand
of the pulper I propose to construct in any well-known or approved
manner.
In the Drawing the case A is shewn as made of cast iron and mounted
on a wooden stand B, to which is fitted a shute C for guiding the pulped

page_text: material as it is discharged from the cutting barrel D into a suitable
receiver. This barrel is mounted in the case A, and it is made cylindrical
with open ends, and with arms E at about the middle of its length to
carry the boss F, which receives the driving shaft of the pulper. These
arms are forked or arched at their extremities where they join the barrel 5
to present as little obstruction as possible to the entrance of the pulped
material into the barrel. Instead of flat steel blades I apply to the
barrel knives a, a, made of corrugated sheet steel, as shewn at Fig. 3.
The barrel it will be seen is cast with transverse parallel slots & through
its periphery, which slots have a tangential side to receive and support 1
the knives. The cutting edge of the knives is chamfered, as shewn at
Fig. 3, the chamfering giving it a corrugated outline in plan view, as
represented at Fig. 3. The knives project beyond the periphery of the
barrel just so far as will enable them to act upon the roots like a series
of gouges, and slice or scrape off strips of the roots, and the slots are 1
indented at one edge (see Fig. 2) somewhat like an escalop shell to offer
a free passage for the strips or cut pieces into the barrel.
The knives may be rivetted to the barrel, as shewn at Fig. 1, or they
may be slotted to receive screws, which will hold them fast thereto and
permit of their adjustment outwards as the cutting edges wear away. 2
In fixing these knives on the barrel they are so arranged with respect to
each other that the corrugations of the one knife will bo out of line
with the corrugations of the following knife. Thus supposing the
centres of the corrugations to be an inch apart, and that four knives
constitute a group, the knives will be set so as to give each corrugation 2
a lateral lead of say a quartor of an inch with respect to those of the
next succeeding knife. This arrangement is illustrated in the diagram,
Fig. 4, where five lines of corrugated knives are represented, the cor-
rugations of the fifth corresponding with those of the first, as indicated
by the vertical red lines, and the knives 2, 3, and 4 being set relatively 3
thereto, as indicated by the diagonal blue lines. The sides of the case
(see Fig. 1) are provided with segment shaped guards G, which overlie
the ends of the barrel, and prevent any pieces of the roots from escaping
in that direction. The front part of the case I provide with ribs at A',
which serve to arrest falling pieces, and present them to the action of 3
the revolving knives. H is a transverso stop plate for preventing the
escape of the roots at the back of the barrel.
When applying my Invention to disc nulnows I arrance the commented.

page_text: knives radially on the disc, and I support them in place over the slots.
in the disc, and adjust them with respect to each other in substantially
the same manner as described with respect to the barrel pulper.
In Sheet II., Fig. 5 shows in front view so much of the disc of a disc
pulper constructed to receive the corrugated knives as will serve to
explain the application of my Invention to that class of pulpers; Fig. 6
is a transverse section of the same; and Fig. 7 is a sectional plan taken
through the line 1, 2, of Fig. 5, and showing the position of the knife
with respect to the slotted disc. I is the slotted disc, and K the radial
slots for receiving the corrugated knives. These slots have one edge
chamfered and the other indented, as in the barrel pulper, and an extra
thickness of metal is provided at the back of the disc to broaden the
support for the knives L. A bar M (see Fig. 7) corrugated on its inner
face to correspond to the corrugations of the knife is used to secure the
knives severally in position. This bar is placed over the knife at the
back of the disc, and it is secured in place by rivets N, which are
countersunk in the disc.
Having now set forth the nature of my Invention of "Improvements
in the Construction of Root Pulpers," and explained the manner of
carrying the same into effect, I wish it to be understood that under the
above in part recited Letters Patent I claim, the adaptation to root
pulpers of the means above described for reducing roots to shreds or
strips.
In witness whereof, I, the said Edward Hammond Bentall, have
hereunto set my hand and seal, the Nineteenth day of August,
T
thousand night hundred and covente.