Improvements in Apparatus for Roasting, Cooling, and Removing Fumes, and Arresting Flight from Coffee and the like.
Year: 1895

page_text: Date of Application, 22nd Nov., 1895-Accepted, 25th Apr., 1896
COMPLETE SPECIFICATION.
Improvements in Apparatus for Roasting, Cooling, and Removing
Fumes, and Arresting Flight from Coffee and the like.
I, BEESTON TUPHOLME of 2 Roberts Place, Falmouth Road, London S.E.
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 improvements in apparatus for treating coffee and the
like substances and comprises in its complete form hoppers or receptacles for the
raw coffee, shoots to convey it to the roasters, coolers, chaff or flight arresters,
receptacles for receiving the roasted berries, together with air pipes, shafting and
other accessories. These various portions may be used together as a complete
apparatus or any one or more may be used in combination with other forms.
The accompanying drawings show my apparatus in general arrangement
together with supplementary views showing various parts in greater detail. In
these diawings the same letters of reference occuring in the different views indicate
the same or corresponding parts.
Figs. 1 & 2 show a complete apparatus. Figs. 3, 4, 5, 6, & 7 show a cooler,
Figs. 8 & 9 the chaff arrester, and Figs. 10, 11, 12, 13, & 14 two forms of
roasters.
In Figs. 1 & 2 I have shown in front and side elevation respectively, two
sets of four roasters each, with the accompanying coolers, etc. The raw berries
are placed in the hoppers A from which they pass by the shoots B to the roasters C.
The roasted berries pass from the lower part of the roasters to the coolers D and
from thence to bins M, sacks N or other receptacles. E. E. are the air pipes
conveying the fumes from the roasters and the inducted air from the coolers to
fans which deliver them to the chaff or flight arrester G.
•
The solid particles are here arrested whilst the uncondensed gaseous substances
pass to the waste pipe H.
The hoppers A may be of any desired shape and capacity or they may be omitted.
The shoots B preferably have a dividing diaphragm and door 6 operated by the
lever of the charging door b'. The space between these doors is proportioned
to hold a roasting charge and the doors themselves and lever so arranged that the
act of closing one door opens the other.
The roasters C may be of any known construction but are preferably constructed
as follows.-Fig. 10 shows an end elevation, Fig. 11 a sectional end elevation and
Fig. 12 a side elevation of an internally heated roaster very similar in construction
to that for which Letters Patent were granted to me and numbered and
dated 4970 A.D. 1887.
In the present case I fit an internal partition or baffle plate caround the
perforated revolving cylinder c¹ in such a manner that the heat which would other-
wise pass direct through this cylinder to the waste pipe c is compelled to pass
around its exterior to an opening c² from whence it escapes between the partition c
and outer casing c³ to the waste pipe c..
A considerable portion of the heat which was formerly wasted is thus given up to
the exterior of the cylinder c¹ and its contained berries.
A wind gate or damper serves to regulate the opening to the waste pipe c'.
Doors operated as shown, or in any other convenient manner, are closed during

page_text: the operation of roasting, but open to allow the roasted berries to pass into the
receptacle I.
The revolving perforated cylinder c¹ is charged and discharged through the
sliding door operated through doors C1 and C2 in the ends of the outer casing.
The atmospheric gas burners for heating, are shown at 7 and the mouth of the
charging hopper at B.
The lower portion of the casing is formed into a hopper I with discharging
door i.
In some cases I fit a similar heat economising device to externally heated
roasters of the ordinary revolving type. Figs. 13 & 14 show one such arrangement
in which the aperture in the case surrounding the cylinder is closed by a plate C³.
One end of this cylinder is perforated; at the other end I have a suitable funnel
or hollow cone leading to-the-flue, so that the heat after having been applied
-externally is by means of the exhaust fan, drawn inside and through the
cylinder thus utilizing the heat that would, in the ordinary method have passed up
the flue.
In the arrangement shown in Figs. 1 & 2 of the accompanying drawings a number
of roasters are connected to a fan F by air pipes having wind gates C8 by which
one or more may be shut off at will. But I may in some cases place a small fan
on the top or other part of each roaster. The fans are used principally for the
purpose of drawing off the fumes etc. thrown off during the roasting and delivering
them into the chaff arrester G.
One of the coolers D is shown in detail in Figs 3, 4, 5, 6, & 7, Fig. 3 being a
side section on a vertical plane of the cooler alone, Fig. 4 a side elevation of the
cooler with mountings, Fig. 5 a section on a vertical plane Fig. 6 a plan, and
Fig. 7 a plan of the under-part with the cooler removed.
The cooler D is preferably of rectangular shape having a perforated bottom d
upon which the heated berries are placed, and through which the air passes into
inner chambers d' opening into a pipe d³ trunnioned at d³ in fixed pedestals d'.
These pedestals serve to support the cooler and also open a communication with
the air pipe E by means of passages and valve or door d
The cooler is rocked into the positions shown in Fig 4 by dotted lines, by the
connecting rod j and cranks J driven by a counter shaft j¹ receiving motion from
the main shaft. At one end of the cooler is formed a discharging door K
sliding vertically in suitable guides and operated in any suitable manner.
In the arrangement shown in Figs. 1, 4, & 6 the door has hooks or handles k
which may be operated when the cooler is in the extreme position shown at K',
Fig. 4, by a bar k' carried at the end of levers mounted on the rocking shaft k²
and operated by a chain k³ and handle Fig. 2. The door K may open into
the shoot of an elevator L Fig. 2, discharging into a bin M or an automatic
weigher, or it may open into a small hopper for filling sacks as at Nor
otherwise.
In Figs. 3, 5, & 6 I have shown vanes or partitions D2 which serve to mix or
turn over the coffee beans during the cooling. They may however be omitted if
desired. I may in some cases use other forms of mechanically moved coolers more
or less in common use and fit them with a perforated bottom and means for drawing
air through the trunnions to expedite the cooling.
The chaff or flight arrester is shown in sectional elevation in Fig. 8 and in
sectional plan in Fig. 9. It is constructed preferably as a cylindrical vessel
having a tangential inlet O and a spiral or volute partition O' terminating in the
waste pipe H.
The lower ends of the partition O' dip into water contained in the lower part
of the vessel.
The chaff "flight" and other waste products enter at O and whirl around inside
the spiral until they fall into the water below, whilst the uncondensed gases are
blown or drawn up the waste pipe H. The velocity of the entrance at and size
of the spiral passage are proportioned so that the solid particles are all thrown

page_text: down before the gases escape at H. A pipe / supplies water and also damps the
walls of the said waste pipe H. The outlet is controlled by a vertically sliding
door or flap with screw and hand wheel h². The solid particles as they accumulate
in the lower part of the arrester, may be drawn off by a pipe P and cock pl into.
a pail Q having a perforated bottom or other receptacle.
A pipe carries away any surplus water.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed I wish it to be
particularly understood that I do not confine myself to the exact details shown
and illustrated but I do declare that what I claim is.-
1. The combination and arrangement of plant for roasting coffee and like
substances consisting principally of roasters, coolers and chaff, or flight, arresters.
together with the connecting pipes, hoppers etc. substantially as shown in Figs. 1
& 2 of the accompanying drawings and described hereinhefore.
2. In roasters for coffee and the like, the internal partitions, or baffle.
plates, or the like, to economise the heat in the manner and for the purposes
set forth.
3. The construction and arrangement of coffee roaster as shown in Figs. 10, 11
& 12 more particularly as regards the cylinder C¹, partition c, outer casing c
together with the means for charging and discharging substantially as described.
4. In coolers for coffee berries and the like, arranged to be rocked, rotated or
otherwise mechanically moved, the construction thereof with hollow trunnions or
similar passages through which air can be drawn or forced, for the purpose of
hastening the cooling of the berries.
5. The combination of mechanically operated coolers with exhausting or blowing
fans for the purposes hereinbefore set forth.
6. The construction and arrangement of rocking cooler substantially as set
forth in Figs. 3, 4, 5, 6, & 7 of the accompanying drawings and as described.
7. The arrangement and construction of chaff or flight arrester substantially as
shown in Figs. 8 & 9 of the accompanying drawings and as described.
Dated this 21st day of November 1895.
TUDO Mn
DEESTON TUPH