A New and Improved Coffee Roaster, Applicable also to Roast Maize and other Substances.
Year: 1889

page_text: Date of Application, 7th June, 1889
Complete Specification Left, 7th Mar., 1890-Accepted, 26th Apr., 1890
A New and Improved Coffee Roaster, Applicable also to Roast Maize
and other Substances.
I, KAREL FREDERIK HENNEMAN of The Hague, Holland, Manufacturer, do hereby
leclare the nature of this invention to be as follows
The object of my invention is to provide a new and improved means for roasting
coffee and other vegetable substances, to obtain beans of an excellent flavour and
aste.
The invention consists in the means for roasting and in the arrangement of parts
and details, and the combination of the same, as will be fully described hereinafter.
Reference is to be had to the accompanying drawings, forming a part of this
specification, in which similar letters of reference indicate corresponding parts in all
he figures.

page_text: This pipe c is united to the tube n n¹ by a ▲ shaped piece m (fig. 3) so that the
burner can be cleaned easily.
The tube n n is closed at its lower end by a pierced piece o by which passes the
end p of the gas piper (fig. 3).
This end p has a conical shape and is provided at the top with one or more small
holes to admit the gas.
In tube n n' there is a hole to admit the air, which can be blown in, when the
pressure of the gas is too little (fig. 3).
The gas piper is provided at a convenient place, with a cocks to regulate the
quantity of gas (fig. 2).
By this arrangement of the gas burner C the combustion is rendered absolutely
complete, in consequence of the perfect mixture of gas and air, of the great distance
between burning point and the introduction of the gas and the great difference of
temperature.
The box D (fig. 3) is connected to the frame B by the pivots u and u¹, so that it
can oscillate.
It is partially open at the upperside, but covered at the ends to prevent spilling of
the roasted beans.
At one side there is a slide z to throw out the coffee (fig. 1 and 4) and the bottom
is composed of perforated sheets (fig. 3 and 4).
Two plates y and y' are applied on the frame (fig. 2 and 4) so that the coffee cannot
bo spilt when the barrel A is emptied.
A fly wheel v with handle and spur wheel w working on the tooth wheel x, on the
axis a of the barrel A (fig. 1, 2 and 3) or such arrangement as is most convenient to
rotate the barrel A, provided at the frame B.
Dated this 7th day of June 1889.
CARPMAEL & CO.,
Agents.
COMPLETE
SPECIFICATION.
A New and Improved Coffee Roaster, Applicable also to Roast Maize
and other Substances.
I KAREL FREDERIK HENNEMAN, of The Hague, Holland Manufacturer, 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 object of my Invention is to provide a new and improved means for roasting
coffee and other vegetable substances, to obtain beans of an excellent flavour and
taste.
The Invention consists in the means for roasting and in the arrangement of parts
and details and the combination of the same as will be fully described hereinafter.
Reference is to be had to the drawings, left with the provisional specification, and
also Figures 5, 6, 7 and 8 hereto annexed, in which similar letters of reference
indicate corresponding parts in all the figures.
Figure 1 shows a front elevation of the apparatus.
2
"
"
3
"
"
4
"
"
side
"
"
"
section on line y of Figure 4.
"
a ß
3.
Figures 5, 6, 7 and 8 show the details of the burner.

page_text: The cylindrical barrel A, the size of which varies in proportion to the quantity of
coffee that is to be roasted, rests with the pivots a and in the frame B (figure 3).
+
Pivot a is massive and lengthened outside the bearings to carry tooth wheel
pulley, or such convenient arrangement in order that the barrel A may be rotated by
hand or by motive power.
Pivot bis hollow to pass pipe c of the gas burner, which does not participate in
the movement (Figure 3).
The distance between pivot b and pipe c is very little but they do not touch
each other.
Both the pivots a and b rest either in fixed bearings or on rollers to decrease
friction.
The barrel A is closed at the ends d and e (Figures 1 and 3) but the cylindrical
part is either entirely or partially composed of perforated sheets ƒ parallelly arranged
with the axis of the cylinder (Figures 1 and 4).
The holes g (Figure 4) in the perforated sheets are so small that the beans cannot
pass them whether broken or not.
h is a plate which can be removed to open or close the barrel A (Figures 1 and 4)
in order to fill or empty it.
Plates are arranged within the harrel A and fastened to the ends d and e, so that
there is some space between the cylindrical shell and the inside part of the plates
(Figures 3 and 4). These plates i are crooked or plane, angular at the inside part
and inclined to the direction of the axis of the cylinder. They are alternately smaller
at one end than at the other.
The burner C (Figure 3) is composed of a pipe c, a tube n. n' and a gas
pipe r..
The pipe c has at the upper side from k to k¹ a somewhat pointed shape, so that
the beans cannot remain on it (Figure 4) and is provided with several incisions
(Figure 3).
I prefer to make the perforated end of the tube c, in three parts as shewn in
Figures 5-8, namely
1. A round iron tube (Figure 7) with round holes at the end with a gradual
decrease in the sizes.
2. A piece of bent copper (Figure 6) provided with small incisions and fixed with
screws to the iron tube.
3. A piece of iron in the shape of a gutter (Figure 8) which is pushed in the
round iron tube. 1st. To remove easily the skins which will in course of time have
dropped into the incisions. 2nd. To get a regular flame in that piece of iron (formed
like a gutter) by the placing of two or more partitions (otherwise the flame would be
on account of the pressure with which the gas comes into the tube, much higher on
one side of the "burner" than the other).
This pipe c is united to the tube n. n' by a 1 shaped piece m (Figure 3) so that the
burner can be cleaned easily.
The tube n. n¹ is closed at its lower end by a pierced piece o by which passes the
end p of the gas piper (Figure 3).
This end p has a conical shape and is provided at the top with one or more small
holes to admit the gas.
In tube n n¹ there is a hole g to admit the air which can be blown in, when the
pressure of the gas is too little (Figure 3).
The gas piper is provided at a convenient place, with a cocks to regulate the
quantity of gas (Figure 2).
By this arrangement of the gas burner C the combustion is rendered absolutely
complete in consequence of the perfect mixture of gas and air of the great
distance between burning point and the introduction of the gas and the great difference
of temperature.
The box D (Figure 3) is connected to the frame B by the pivots u and u¹ so that
it can oscillate.

page_text: It is partially open at the upper side, but covered at the ends to prevent spilling of
the roasted beans.
At one side there is a slide 2. to throw out the coffee (Figures 1 and 4) and the
bottom is composed of perforated sheets (Figures 3 and 4).
Two plates y and y¹ are applied on the frame (Figures 2 and 4) so that the coffee
cannot be spilt when the barrel A is emptied.
Or instead of the two plates y y a trough may be substituted closed underneath by
a drawer in which the dust and skins of the coffee nibs drop while the coffee is being
roasted and which is pulled out leaving an opening in the bottom of the trough when
it is desired to empty the cylinder into the box D.
A fly wheel with handle and spur wheel w working on the tooth wheel on the
axis a of the barrel A (Figures 1. 2 and 3) or such arrangement as is most convenient
o rotate the barrel A is: provided at the frame B.
to
.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed I would state that I am
aware that a roaster has before been proposed which consisted of a perforated cylinder
mounted on trunnions having inside an axial perforated gas tube or burner such tube
being fixed to the cylinder and revolving with it and I am also aware that a roaster
has before been proposed which consisted of a perforated cylinder mounted on trunnions
one of which was hollow to admit of the flame from an external gas burner passing
into the interior of the cylinder I wish it to be understood that I lay no claim to
such arrangement but what I claim is :—
1. The combination of a cylinder mounted on trunnions one of which is hollow
and an independent non-rotating burner passing into the cylinder through the hollow
trunnion substantially as described.
2. In apparatus such as is referred to in the first claim the burner consisting
of a perforated horizontal pipe whose upper surface is arched so as to prevent
the coffee or other substance from lodging upon it substantially as described.
3. The lifters i i fixed to the ends of the cylinder substantially as described.
4. The combination with a roaster of a pivotted box D with a perforated bottom
substantially as described.
5. Roasters substantially as described and shown in the drawings.