An Improved Mechanical Hand Grater for Spices, Bread, or other Substances.
Year: 1889

page_text: Date of Application, 9th Aug., 1889
Complete Specification Left, 30th Apr., 1890-Accepted, 9th Aug., 1890
PROVISIONAL SPECIFICATION.
An Improved Mechanical Hand Grater for Spices, Bread, or other
Substances.
1, THOMAS WILLIAM STONE, of 189 Goldhawk Road, in the County of London,
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to an improved mechanical grater operated by hand for
reducing nutmegs, spices, bread, or other articles to a grated powder.
My improved apparatus may consist of a combined apparatus for treating spices
such as nutmegs and a distinct appliance for grating bread plain or toasted, or may
consist of either equivalent but modified apparatus singly.
To grate nutmeg or other spices I fit a hand lever provided with a suitable knob
to an axle passing through the grating box, on to which is keyed a pinion, and a
circular grater made of a bulbous form to fit into a corresponding recess in a feed
plate. The said feed plate is capable of sliding freely in the grating box towards
the grater, and in the said recess the nutmeg or spice may be placed through a
suitable sliding or other door in the grating box. The axle of the hand lever also
carries within the box a pinion or pinions which gear with reduction of speed
into a cogged wheel or wheels. The latter cogged wheel or wheels engage into
racks attached to the aforesaid feeding plate, so that as the grating shaft is revolved
by the hand lever, the feed plate is fed gradually up to the surface of the grater, by
means of the aforesaid train of wheels and racks, the racks and feeder plate sliding
in suitable grooves within the grating box. The relative rate of feed, compared
with the rotations of the grating axle, may be accurately adjusted as required by the
ratio of the aforesaid train of wheels.
When the nutmeg or spice is placed in position in the recess in the feeder plate
and the grater, a turning movement of the driving hand lever presses the feeder
plate up to the grater and thus grips the nutmeg or other spice. By a continuation of
the rotative movement, the nutmeg or spice is continued to be fed with some pressure
against the surface of the grater, which, rotating at the higher speed of the hand
lever axle, grates away the surface of the nutmeg or other spice in proportion to
the said feed, until the spice has been entirely reduced to a grated powder.
A suitable orifice or orifices are provided in the bottom of the chamber, to allow
the grated powder to escape into a saucer or plate, the grating box being sufficiently
raised to admit the same underneath it.
To effect the grating or crumbing of bread, plain or toasted, or similar material,
I construct the grating surface in the form of a disc, provided with suitable grating
teeth, and I rotate the said disc by a hand levor. The bread or other material is
placed in a feeding plate between the face of the disc and the end of the grater box,
and the feed of the bread towards the grating disc is effected as before by a worm
upon the grater axle, and worm wheel and cogged train of wheels operating slowly a
rack or racks attached to the feeder plate. As therefore the grating disc is revolved,
the self acting feed train presses the bread up against the face of the grating disc,
until it has all been reduced to crumbs.
Suitable apertures are provided in the said grating disc to allow the crumbs to pass
through, and a suitable aperture is placed at the bottom of the grating box to allow
the delivery by gravity of the crumbed bread or material into a suitable receptacle
placed below the grating box, which is raised a sufficient height to admit a plate or
saucer being placed underneath it.
The two modified grating boxes thus described, are equivalent in operation, but
with modified grating appliances to suit the various materials. They may be united
"

page_text: in one grating box with two distinct operating hand levers or may be made and sold
separately, each having a common principle of a rotating grater with a slow self-act
feed of the material, pressing it against the grating surface with any desired pressure
or speed.
It is obvious I may vary the nature and shape of the grating surface I employ
to suit various materials without departing from the essence of my invention, which
combines a mechanical grating operation with a self-act pressure feed towards the
grating surface.
Dated this 8th day of August 1980
FELL & WILDING,
1, Queen Victoria Street, London, E.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improved Mechanical Hand Grater for Spices, Bread, or other
Substances.
I, THOMAS WILLIAM STONE, of 189 Goldhawk Road, in the County of London,
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 invention relates to an improved mechanical grater operated by hand for
reducing nutmegs, spices, bread, or other substances to a grated powder.
. My improved apparatus consists of one or more various grating surfaces adapted to
such materials as inay be desired, the grating surfaces being rotated either collectively,
or separately by a band crank or cranks.
I produce a constant grating effect by pressing the substances desired to be grated,
from behind by any suitable pressure obtained by either spring or other equivalent
mechanical means against the rotating grater surface.
This surface may be of a different nature and form according to the class of
substances to be grated.
In order that my invention may be the better understood I now proceed to describe
the same in relation to the drawings hereunto annexed, reference being had to
the letters and figures marked thereon. Like letters refer to like parts in the
various figures.
Figure 1. is a side sectional view of my grating machine in which I have
embodied two equivalent means of grating for such substances as nutmegs and bread
respectively.
Figure 2. is an end sectional elevation of the same showing the feeding mechanism
for the bread grater.
Figure 3. is a plan of the same with the nutmeg feeding boxes in section.
Figure 4. is an end elevation showing the disposition of the nutmeg feeding boxes
around the grater box.
In order to grate nutmeg, or other spices, I fit a hand lever A provided with a
suitable knob B to the axle passing through the grating box D.
On this axle C is fixed a drum preferably of parallel form, the external surface of
which is serrated with any suitable form of grating edges.
Upon the grating box DI preferably arrange three feeding boxes F within which
the nntmeg or other spices are placed.
These feeding boxes F are provided with a feeding plate G. which can be pressed
forward towards the grating drum E by a spring H arranged around the spindle I in
order to feed the nutmeg with sufficient pressure against the rotating drum E so that
upon the rotation of the said drum the nutmeg or other spices will be grated.
In order to place the nutmeg within the feeding boxes F I preferably arrange the

page_text: said feeding boxes upon a hinge K so that its end may be withdrawn from the
periphery of the drum in order to insert the nutmeg.
The edge of the feeding box F is of such a form that when placed in position
against the periphery of the drum it will lie in close proximity with the same all
round.
The feeding box may be kept up in its closed or feeding position by a button J.
In order to utilise the considerable length of the grating drum I preferable dispose
the feeding boxes F around the sides of the grating box as shown in Figure 4 so that
each feeding box has a separate section of the drum with which to grate the respective
nutmegs contained therein.
Beneath the grating drum F I arrange a drawer M within which I provide an
internal box having perforated sides and bottom so that upon the nutineg being
grated by the grater and falling into the drawer beneath, this internal box can
be removed in order to sift the grated nut over anything that is desired.
For grating bread or other similar substance I prefer to arrange my grating surface
in a different manner to that herein before described.
I arrange a lever a having a suitable knob or handle upon a spindle c supported
in the sides d of the grating box. Upon the spindle c I fit a grater disc e so that it
shall revolve with the spindle c.
The grating edges I prefer to make of a coarser pitch and larger form than those
used in the nutmeg grater.
This rotating grater disc is of such a size that its edges are just enclosed within the
sides of the box.
I provide a feed plate g situated in front of the greater disc e.
This feed plate is preferably of a square form, as shown in Figure 2. and also of
such a size that it is just contained within the sides of the grating box.
I arrange this feeding plate 9 so that it shall be fed with a steady, and regular
movement to the rotating disc e this I carry out as follows:-
Upon each side of the feed plate g I arrange a rack f which gears into cog
wheels arranged upon the spindle t, which also carries the cog wheel k. This
wheel gears into the worm n arranged upon the spindle c, so that upon rotation of
the handle a which turns the spindle e the disc grater e is revolved. The bread is
inserted into the grating box through the sliding door o and is fed up against the
grater disc e by the feed plate g, the movement of the said feed plate being effected
through the rack, cog wheels hhk and the worm n on the axle c simultaneously
with the rotation of the grater disc e.
I make the surface of the feed plate of a similar nature to that of the rotating disc
in order to hold the bread against the rotative effect of the grater or equivalently to
grate the bread should it be rotated by the grater.
The grating projections are preferably formed by a series of holes punched through
a plate of thin metal, such as tin plate leaving the edges of the material so punched
through projecting from the surface.
The object of the holes is that some of the bread is forced through the said holes
and is crumbled during its passage.
As the bread is grated it falls through any suitable grating p arranged on the lower
part of the grating box into a drawer m.
I do not confine myself to the particular methods described for feeding the materials
up to the grating surface so long as the action is automatic and simultaneous with the
rotation of the grating surface as it is obvious that this may be effected in many
equivalent ways.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed 1 declare that what 1
claim is :-
1st. A mechanical grating machine for spices, bread or other similar substances.
consisting of a rotating grating surface in combination with a feeding plate operated

page_text: by spring or other mechanical pressure in order to effect the automatic feeding
simultaneous with the rotation of the grater substantially as described.
-2nd. In a mechanical grater, a rotating grater surface, feeding boxes (each having
spring pressed feeding plate) arranged at various heights to utilise the whole length
of the said rotating grating surface substantially as described.
Dated this 30th day of April 1890.
FELL & WILDING,
1, Queen Victoria Street, E.C., Agents for the Applicant.