Improvements in or connected with Root Graters and other Machines of a like Nature.
Year: 1893

page_text: Date of Application, 18th Nov., 1893
Complete Specification Left, 18th Aug., 1894-Accepted, 29th Sept., 1894
PROVISIONAL SPECIFICATION.
Improvements in or connected with Root Graters and other
Machines of a like Nature.
I, WILLIAM BEARD LAKE, of New Street Works,. Braintree, in the County
of Essex, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements upon an invention in respect of which
Letters Patent were granted to me dated the 1st day of January 1892, No. 44,
for certain "Improvements in or connected with root graters and other machines
of a like nature" and the object of my present invention is to improve the details
of construction of some of the parts.
In root graters constructed according to my invention lastly hereinbefore
referred to, the side flanges or clips of the teeth or cutters are arranged at some
distance from the cutting edge thereof and the tooth or cutter consequently was
unsupported at or near its cutting edge and this defect has proved somewhat
troublesome inasmuch as the cutters have been liable to break off at that part
owing to the severe work that they are called upon to perform and furthermore the
body of the cutter did not take a solid bearing upon the disc or plate but relied too
much upon the flanges or clips for its support.
Now, according to one feature of my present invention, I commence the side
flanges at the cutting edge so that the tooth or cutter is supported right up to its
work and in order to give a further support to the tooth or cutter and prevent any
movement thereof in one direction with relation to the disc or plate, I form at
each side of the slot or apperture for the cutter a shoulder against which shoulders
the lower edges of the flanges clips or abut. I make the slot or aperture of
sufficient size above the said shoulder to receive the flanges which are turned over
on to the back of the disc or plate, as is well understood whilst I form upon the
rear or lower end of the tooth or cutter clips or flanges which are similar to those
herein before described and are similarly received into slots or recesses in the
plate and turned over on to the back of the latter. These clips or flanges abut
against the upper edge of the slots or recesses and thus prevent the movement of
the tooth in the direction opposite to that above referred to.
Or in some cases, I substitute a single tag or clip for the rear or lower end clips
or flanges and I then form slots or recesses at the sides of the slot or aperture in
the plate for the tooth, such slots or recesses being of sufficient size to receive the
clips or flanges, the top and bottom edges of which take an abutment against the
shoulders formed by the two ends of the slot or aperture and thereby prevent
the independent movement of the tooth.
I sometimes form the before-mentioned tag or clip wider than the lower part of
the aperture in the plate for the reception of the tooth, and I provide slots at the
sides of the said aperture for the passage of such widened tag or clip. When this
widened form of tag is employed can dispense with the shoulders at the forward
parts of the slots provided for the side flanges as above described.
The general body of the tooth or cutter is formed of greater width than the
slot or aperture in the disc or plate so that it takes a bearing for a considerable
part of its length upon the face of the disc or plate, whilst for the rest of its
ength, the clips or flanges take a bearing upon the back of the disc or plate as
ereinbefore explained.

page_text: By the means herein before described, I form a more solid attachment of the
tooth or cutter with the disc or plate than heretofore and that without any
increase in the cost of production or in the labour incidental to its application.
Dated this 18th day of November 1893.
VAUGHAN & SON,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or connected with Root Graters and other
Machines of a like Nature.
.
I, WILLIAM BEARD LAKE, of New Street Works, Braintree, in the County
of Essex, Engineer, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
My said invention relates to improvements upon an invention in respect of which
Letters Patent were granted to me dated the 1st day of January 1892, No. 44, for
certain "Improvements in or connected with root graters and other machines of a
like nature," and the object of my present invention is to improve the details of
construction of some of the parts.
In root graters constructed according to my invention lastly herein before referred
to, the side flanges or clips of the teeth or cutters were arranged at some distance
from the cutting edge thereof and the tooth or cutter consequently was unsupported
at or near its cutting edge and this defect has proved somewhat troublesome inas-
much as the cutters have been liable to break off at that part owing to the severe
work that they are called upon to perform and furthermore the body of the cutter
did not take a solid bearing upon the disc or plate but relied too much upon the
flanges or clips for its support.
Now, according to one feature of my present invention, I commence the side flanges
at the cutting edge so that the tooth or cutter is supported right up to its work,
and, in order to give a further support to the tooth or cutter and prevent any
movement thereof in one direction with relation to the disc or plate, I form at each
side of the slot or aperture for the cutter a shoulder against which shoulders the
lower edges of the clips or flanges abut. I make the slot or aperture of sufficient
size above the said shoulder to receive the flanges which are turned over onto the
back of the disc or plate as is well understood, whilst I form upon the rear or
lower end of the tooth or cutter clips or flanges which are similar to those herein-
before described and are similarly received into slots or recesses in the plate and
turned over on to the back of the latter. These clips or flanges abut against the
upper edges of the slots or recesses and thus prevent the movement of the tooth in
the direction opposite to that above referred to.
Or, in some cases, I substitute a single tag or clip for the rear or lower end clips
or flanges and I then form slots or recesses at the sides of the slot or aperture in
the plate for the tooth such slots or recesses being of sufficient size to receive the
clips or flanges, the top and bottom edges of which take an abutment against the
shoulders formed by the two ends of the slot or aperture and thereby prevent
the independent movement of the tooth. I sometimes form the before mentioned
tag or clip wider than the lower part of the aperture in the plate for the reception
of the tooth and I provide slots at the sides of the said aperture for the passage of
such widened tag or clip. When this widened form of tag is employed, I can
dispense with the shoulders at the forward parts of the slots provided for the side
flanges, as above described.
The general body of the tooth or cutter is formed of greater width than the slot
or aperture in the disc or plate so that it takes a bearing for a considerable part
of its length upon the face of the disc or plate, whilst, for the rest of its length,

page_text: Figure 10, is a longitudinal section taken on the line 4-4 of Figure 9.
Figure 11, is a face view of the cutter disc or plate with the tooth or cutter
removed.
Figure 12, is a similar view to Figure 1, representing a further slight modification,
and,
Figure 13, is a view of the cutter disc or plate with the tooth or cutter removed.
In the several figures like parts are indicated by similar letters of reference.
Referring to Figures 1. to 8., a represents the disc or plate, and 6 represents the
tooth or cutter which according to the present invention is furnished with side
Hanges commencing at the cutting edge 6 so that the tooth or cutter b is
supported right up to its work, and, in order to give a further support to the tooth
or cutter band prevent any movement thereof in one direction in relation to the
disc or plate a., on each side of the slot or aperture a¹ of the disc or plate a which
receives the tooth or cutter b. is formed a shoulder a* against which shoulders a²
the lower or front edges of the clips or flanges b¹abut.
The slot or aperture a' above or beyond the shoulders a' is formed of sufficient
width to receive the clips or flanges 61 which are turned over onto the back of the
disc or plate a, as represented at Figures 1, 2, and 3., and, as, is well understood,
whilst on the rear or lower end of the tooth or cutter b. are formed clips or flanges b³
which are similar to those hereinbefore described and are similarly received into
slots or recesses a³ in the disc or plate a and turned over onto the back of the
latter, as shown in the figures last mentioned.
These clips or flanges & abut against the upper edges of the slots or recesses a³
and thus prevent the movement of the tooth or cutter in the direction opposite to
that above referred to.
The general body of the tooth or cutter b. is formed of greater width than the
slot or aperture a' in the disc or plate a. so that it takes a bearing for a considerable
part of its length upon the face of the disc or plate a., whilst for the remainder of
its length the clips or flanges 61 and 62 take a bearing on the back of the disc or
plate a, as hereinbefore explained.
In the example given at Figures 9, 10. and 11., a single tag or clip 62 is substituted
for the rear or lower end and lateral clips or flanges 6 hereinbefore shown and
described and the slots or recesses a' at the sides of the slot or aperture a¹ for the
tooth or cutter 6 in the plate or disc a, are of sufficient size to receive the clips or
flanges 6 the top and bottom edges of which take an abutment against the
shoulders as a formed by the two ends of the slot a and thereby prevent the
independent movement in either direction of the tooth or cutter b.

page_text: In the example given at Figures 12. and 13., the before mentioned tag or clip 6
is formed wider than the lower part of the slot or aperture a' for the reception of
the tooth or cutter in the plate or disc a and slots or recesses a³ are provided at
the sides of the said aperture a' for the passage of the widened tag or clip 62 which
is then bent over onto the back of the plate in the manner represented by the
dotted lines at Figure 12.
When employing the widened tag or clip 62 lastly herein before described the
shoulders a, shown and described with respect to Figures 9., 10. and 11 and
provided to engage the side flanges 6', may be dispensed with...
By the means herein before described, a more solid attachment of the tooth or
cutter b with the disc or plate a is obtained than heretofore and that without any
increase in the cost of production or in the labour incidental to its application.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. A tooth or cutter, for a root grater, formed with side flanges or clips extending
right up to the cutting edge thereof, substantially as herein shown and described
and for the purpose stated.
2. In a root grater or the like, the combination of a disc or plate formed with a
number of slots therein provided with shoulders or recesses in the edges thereof
and a number of teeth or cutters each adapted at some part to rest upon the face
of the disc and provided with lateral clips or flanges extending right up to the
cutting edge and turned on to the back of the disc or plate, corresponding clips or
flanges or a tag at the opposite end of the tooth or cutter also turned over onto
the back of the disc or plate, some or all of such clips or flanges engaging the
shoulders of the slots of the disc or plate, substantially as herein shown and
described and for the purpose stated.
Dated this 18th day of August 1894.
VAUGHAN & SON,
Agents for the Applicant.