Improvements in Root Pulping Machines.
Year: 1890

page_text: Date of Application, 21st June. 1890
Complete Specification Left, 21st Mar., 1891-Accepted, 9th May, 1891
PROVISIONAL SPECIFICATION.
Improvements in Root Pulping Machines.
We FREDERICK RANDELL HORACE RANDELL FRANK RANDELL and
WILLIAM BLOOMFIELD BRETT of St. Nicholas Works North Walsham in the
County of Norfolk Engineers do hereby declare the nature of our invention to be
as follows:-
The object of this invention is to provide a machine which is more efficient than
are those hitherto constructed and which is automatically cleaned. According to
this invention there is provided a disc carrying serrated knives arranged radially on
the disc and in proximity to the disc is a threaded spindle or roller so situated
relatively to the disc (preferably vertically) that as the knives pass the threaded
spindle or roller as the disc rotates the serrations of the knives pass between the
thread or threads of the said threaded spindle or roller and so the knives are
efficiently cleaned. The said threaded spindle or roller and the disc are rotated
which may be done by any suitable means for instance by bevel wheels in gear one
being fixed to the spindle of the disc and the other to the threaded spindle or
roller.
Dated the 21st day of June 1890
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Root Pulping Machines.
We FREDERICK RANDELL, HORACE RANDELL, FRANK RANDELL and
WILLIAM BLOOMFIELD BRETT, all of St. Nicholas Works, North Walsham,
in the County of Norfolk, Engineers, do hereby declare the nature of our inven-
tion and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement :-
This invention relates to pulping machines of the well known disc form and has
for its object to provide a machine of this kind which is more efficient than are
those hitherto constructed and which is automatically cleaned.
According to this invention a disc is provided with knives so arranged radially
on the disc that the teeth or points of one knife travel in tracks different from
those in which the teeth or points of the adjacent knives travel, and in proximity
to the disc is a threaded spindle or roller so situated relatively to the disc that as
the disc revolves and the knives pass the threaded spindle or roller the teeth or
points on the knives pass between the thread or threads of the said threaded
spindle or roller and so the knives are efficiently cleaned. The teeth or points on
the knives may be of any suitable formation such as, for instance-sharp pointed,
flat, or curved.
In order that the invention may be well understood we will describe the same
with reference to the accompanying drawing
Fig. of which is a back elevation of a root pulping or cutting machine
constructed according to this invention.
Fig. 2 is a back elevation and
Fig. 3 is a view at right angles thereto shewing the arrangement of the cutters
and the cleaning spindle or roller.
A is the rotating disc fast on a shaft or spindle B mounted in bearings C on the
framing D of the machine, and provided with a handle or other suitable means for
Price 1

page_text: rotating the disc. On the face of the disc are secured radiating knives or cutters E
having cutting teeth or projections e which may be of any suitable form for instance
sharp pointed, flat, or curved, examples of suitable shapes being shewn in Figure 4.
These radiating knives are so arranged that the teeth on one knife do not travel in
the same tracks as the teeth on the adjacent knives, but so that the whole series of
knives acts to effect cutting or pulping throughout the whole surface of the disc,
whereby a complete disintegration of the articles or material is obtained. In close
proximity to the face of the disc A is a spindle or roller F having formed thereon,
or therein, a screw thread or screw threads or helical groove or grooves to suit the
track of the knives and corresponding in shape to the teeth or projections e on the
knives E so that the said teeth or projections, as the dise A. revolves, pass between
the convolutions of the threads or grooves in the said spindle or roller whereby the
teeth on the knives are efficiently cleaned.
The spindle or roller is caused to revolve, for which purpose it is mounted in
bearings and provided with a bevel pinion g gearing with a corresponding pinion
fast on the axle B of the disc A so that when the disc is rotating the spindle or
roller will be caused to revolve in the opposite direction and thereby remove from
the cutters any material that may be adhering thereto.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1st. In pulping machines the combination with a rotative disc carrying a series
of knives with teeth or projections arranged as described of a rotative spindle or
roller having a helical groove or thread or helical grooves or threads to suit the
track of the knives substantially as, and for the purpose, hereinbefore described
with reference to the accompanying drawings.
al
2nd. In pulping machiues the combination of a disc carrying a series of knives
having teeth or projections arranged as described and a spindle or roller having
helical groove or thread or helical grooves or threads corresponding in shape to the
teeth or projections on the knives, and means for rotating the roller in a direction
the reverse of that in which the disc is rotated substantially as, and for the purpose,
hereinbefore described with reference to the accompanying drawings.
3rd. The combination and arrangement of parts constituting the pulping machine
substantially as hereinbefore described and illustrated by the accompanying
drawings.
Dated this 18th day of March 1891.
FREDERICK RANDELL.
HORACE RANDELL.
FRANK RANDELL.
WILLIAM BRETT.