Apparatus for Grating, by a Rotatory Process, Vegetable and other Substances of a Culinary Character.
Year: 1890

page_text: Date of Application, 10th Jan., 1890
Complete Specification Left, 10th Oct., 1890-Accepted, 15th Nov., 1890
PROVISIONAL SPECIFICATION.
Apparatus for Grating, by a Rotatory Process, Vegetable and other
Substances of a Culinary Character.
1, JAMES BOAG, 19 Great Western Road, Glasgow, Teacher do hereby declare the
nature of this invention to be as follows:-
It consists of a hollow cylinder of thin metal, preferably of tinned sheet iron,
perforated in the same manner as the grater ordinarily used for culinary purposes.
This cylinder rotates in a case bored or slit at its two ends to receive the axle of the
cylinder said axle being bent at one end into a handle outside the case. The case
is made of various shapes but always so as to serve as a stand for the apparatus and
also as a receptacle for receiving the substance to be grated. The case may be of
thin metal or of earthenware. The substance to be grated is pressed against the
cylinder by a moveable cover. The cylinder, while grating, is kept from stuffing by
means of the "cleaner," which consists of a slip of thin metal toothed like a comb.
The novelty of the invention lies in the substitution of rotatory motion for that of
the ordinary grater.
T
COMPLETE SPECIFICATION.
Apparatus for Grating, by a Rotatory Process, Vegetable and other
Substances of a Culinary Character.
I, JAMES BOAG, 19 Great Western Road, Glasgow, Teacher, 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:―
The invention resolves itself into two types, each of which is made in a number of
different but allied forms. The first type is that in which the grating surface
consists of a cylinder. The simplest form of this type is represented in Figure I of
the drawings. It consists of a rotating cylinder A, perforated like an ordinary
carrot grater-the cutting surface being outwards. A plate H placed diametrically
inside the cylinder supports the axle I-this axle being fixed in a standard F which
rests on an oblong plate of metal or wood also marked F. Here the substance to be
grated is held to the cutting surface by the haud.
In Figure II the cylinder and the parts about it are similar to those in Figure I,
but the standard supporting the axle consists of two metallic bars crossing each other-
each being bent at the bottom into a right angle or other suitable shape for a basis of
support. To these bars, at the top, a box, or receptacle, E is screwed, and into this
box the substance to be grated is placed, and kept in contact with the grating
cylinder, whose surface forms, as it were, the bottom of the receptacle. The box E is
termed the "feeder."
:
In Figure III the feeder E is placed at the side of the cylinder, and turns, near its
bottom, on an axle which projects, like the axle 1, from the upright part of the
standard F. The tongue-shaped part of the feeder seen on the left side of the
figure, being depressed by the hand, brings pressure to bear upon the substance to be
grated, by causing the feeder, as the substance is diminishing, to approach closer and
closer to the cylinder until the whole has been grated. The standard in this form of
the machine may be bent so as to make a cramp for holding the machine in position.
In Figure. IV the standard consists of two bars bent downwards at each end and
connected by cross bars as shewn in the drawing. L which is axled to F supports the
[ Price 8d 1

page_text: axle I. The feeder E is curved up to allow of the axle resting upon it. Pressure
being put by the hand upon L causes the feeder to act precisely as in the former
case.
Machines of the second type have, instead of the perforated cylinder, a rotating
circular plate also perforated. This plate is designated A in Figures V, VI, and VII.
All the machines of this type may have a metallic bar F, at one end of which is a
breast-piece, and at the other end a cramp for fastening the machine to the top of a
table or other convenient article of furniture. It is only, however, in the larger
machines that the breast-piece and the cramp are both necessary for keeping the
machine in position. The requisite pressure may be obtained by weighting the
perforated disk A, but for the application of pressure preference is given to
the employment in each case of the screw E which appears in the last three figures
of the drawings.
The simplest form of machines of this type is that in which-with the bar E, the
perforated plate A, (hereafter referred to as the "cutter") and its handle-there is
nothing more than a side-catch to assist the hand in holding the substance to be
grated, while the cutter is acting upon it. This form, being included in the others, is
not separately drawn.
In Figure V the screw E is squared at the top to receive the cutter A ; it works
down through the circular plate N, and is loose in the circular plate L except that a
collar on the screw under the plate and another collar above the plate cause the
screw to carry the plate up and down with itself. The circular plate N is fixed to F
& is, therefore, stationary. In L, near. the circumference, are fixed a number of
spikes S, pointing upwards, and passing through holes in the plate N. The substances
to be grated are stuck on the spikes just below the cutter, and are pressed down
till they rest on the plate N. The handle K is now turned, and the revolving cutter
descends and acts upon the substances stuck upon the spikes. With the same speed
with which the cutter is descending the plate L is also descending, carrying with it
the spikes which are thus withdrawn from the substances to be grated in advance
always of the cutter.
In Figure VI the cutter A revolves round the screw E which is fixed in the bar F.
H is a hollow cylinder with a perforated bottom and is fastened to F. The substance
to be grated is put in H. When the cutter revolves this substance must either be
carried round with the cutter or it must remain fixed to the bottom. If it is carried
round by the cutter it will be grated by the perforated disc forming the bottom of
the cylinder; if it remains fixed to the bottom, it will be grated by the revolving
cutter.
In Figure VII, which is a vertical section, there are two cutters A and A, coupled
together by the rod O, so that the motion communicated to the upper cutter is
transmitted to the lower. O is fastened to the upper cutter, but is free to pass up and
down through a hole in the lower cutter. The screw is fixed in F: it is right-
handed for the one cutter and left-handed for the other cutter, so that the two cutters
in revolving must either approach, or recede from, each other. H is a cylinder
screwed or rivetted to F. Spikes, placed horizontally and pointing inwards, are
fixed near the upper edge of the cylinder. Two of these spikes S are shewn in the
figures. Upon these spikes are stuck, between the two cutters, the substances to be
grated. In place of the spikes, and occupying the same position, there may be
attached to the cylinder a flange with a number of holes in it for receiving the
substances to be acted upon.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that
what I claim is.
1. The application of rotary motion to the grating of substances of a culinary
character in substitution of the reciprocal motion hitherto employed.
2. The mechanical combinations constituting the various apparatus which have
been herein particularly described.

page_text: 3. Any and every of the parts of these apparatus in so far as they may be
employed to effect the end in view, namely, the grating of substances of a culinary
kind.
1000