New or Improved Roaster or Torrefler for Coffee and other Vegetable Substances.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
New or Improved Roaster or Torrefler for Coffee and other Vegetable
Substances.
I, FRANÇOIS CHARLES THIEL, of 10, Passage du Désir, 84, Rue du Faubourg St.
Denis, Paris, France, Beer-dealer, do hereby declare the nature of this invention
to be as follows:
The apparatus forming the object of the present invention consists of a roaster
or torrefier for coffee and other vegetable substances so constructed as to obtain an
absolutely uniform roasting of the material placed into the apparatus, and which
may be applied to any heating-system employed for this use.
I have gained this end by the rotation of a torrefying sphere simultaneously in
two planes perpendicular the one to the other, producing an absolutely uniform
heat at all the points of the surface of the sphere, as well at the fastening-points
of the trunnions as at the other points of the surface.
The apparatus is characterized by a metallic sphere destined to contain the sub-
stances to be torrefied provided at both extremities of one of its diameters with two
trunnions turning in cylindrical holes arranged in an exterior metal circle con-
centrical of the sphere and supporting it by those trunnions; at the extremities
of a diameter perpendicular of the axis of the two mentioned trunnions, the metal
circle bears two reinforcements with two cylindrical holes; in one of these holes
the axis of the maincrank is wedged, which therefore causes the circle to move in
a straight line, the other hole allowing the axis of a cogwheel of concave shape to
pass loosely, this wheel being placed on the interior of the circle near the surface
of the torrefying globe however without touching it, and catching into another
toothed-wheel, this one being fixed on to the surface of the torrefying globe.
The apparatus rests in two vertically and diametrically opposed grooves, con-
trived in the top of the partition of a metallic cylindrical or prismatical chest
containing the firebox.
One of the two grooves holds the crankshaft which turns on the bottom of this
groove, the other groove containing the axis of the concave cogwheel, this shaft
being forged square at its supporting point in this groove of the firebox, so as to
fasten the concave cogwheel which catches into the cogwheel secured to the
globe-torrefier, in the circular motion imparted to it through its two trunnions
by the exterior circle operated by the crank, in addition to said motion communi-
cated to the globe and which is a rotatory one in the vertical direction, the fast
toothed-wheel engaging with the toothed wheel of the globe, imparts to it a
second rotatory motion, this however being horizontal. This double rotatory
motion is intended to convey successively and rapidly all the points of the surface
of the globe-torrefier straight with the fire.
Dated this 28th day of Anril 1897

page_text: New or Improved Roaster or Torrefier for Coffee and other Vegetable
Substances.
I, FRANÇOIS CHARLES THIEL, of 10, Passage du Désir, 84, Rue du Faubourg St.
Denis, Paris, France, Beer-dealer, 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:-
This invention relates to a torrefier and has for its object to provide a device
for torrefying coffee, cocoa and other vegetable substances, in which all the sub-
stance to be torrified shall be uniformly exposed to the heat.
Heretofore in torrefiers of the above class, a receptacle has been provided
pivotally secured upon a central axis and revolved thereon over the medium of
heat. The objection is, that the ends of the torrefier, or the parts adjacent to
the axial ends, are farther removed from the heat than the centre of the receptacle,
with the result, that the substance contained therein is unevenly torrefied. I over-
come this difficulty by simultaneously revolving the torrefier in two directions,
thereby the entire surface of the receptacle is exposed to the heat upon each
revolution of the receptacle.
The invention, therefore, consists in the parts as hereinafter shown in the
drawings, described in the specification and pointed out in the claims.
In the drawings, -
Figure 1, is a longitudinal vertical sectional view of a heat box, illustrating
the torrefier receptacle and revolving mechanism in side elevation.
Fig. 2, is a front elevation of the upper portion of the heat box and cap there-
for, illustrating the means for removing the torrefier receptacle.
A designates the heat box, which is surmounted by a chimney P removably
secured thereon. Upon opposite sides of the heat box are secured bearings B B¹
and leading into the bearings is a segmental slot b cut in the bearings and in the
heat box. Journaled in the said bearings are the stub shafts D D¹ secured to
the ring E upon opposite sides of the same at the enlarged parts Q Q¹. Secured
upon the stub shaft D is a hand lever M by which the said stub shaft D and the
ring are revolved. F designates the torrefier receptacle, which is spherical in form
and is journaled by means of the stub shafts T T¹ entering bearings in the ring E;
the bearings for the receptacle being at right angles to the bearings for the ring E.
Secured upon the inner end of the stub shaft D¹ is a cog wheel R, which meshes
with a similar cog wheel R¹ secured upon the cylinder F. Pivotally secured at N
to the exterior surface of the heat box A, is a bail K, one end K¹ having an
enlargement k, which serves as a bearing to encircle the stub shaft D, the end pro-
jecting beyond the shaft and being bent at right angles, forming a handle L.
The opposite end K³, of the bail K, is secured upon stub shaft D¹ preferably
by a key, whereby the stub shaft D₁ is immovable and held from revolution it
being understood that the ring E is secured to stub shaft D, but revolves upon
stub shaft D', consequently as the ring is revolved, as heretofore explained, the
torrefying chamber F being carried with it, the cog wheel R¹ will, by its engage-
ment with the stationary wheel R, revolve and the torrefying chamber will also
be revolved at right angles to the revolution given by the actuation of the hand
lever M, consequently the torrefying chamber will be revolved in two directions
simultaneously, and the entire surface of the torrefying chamber will be exposed
to the action of the heat.
In order to insure a visual inspection into the interior of the torrefying cham-
ber, and also to insert and remove the substance to be torrefied, or already torre-

page_text: fied, I provide an orifice O therein, closed by a door H, sliding in ways G G¹,
a handle X upon the door serving as a medium by which it can be raised and
lowered.
When it is desired to remove the torrefying chamber from the heat box, han-
dle L is grasped and the bail K is swung upwardly carrying the ring E and
consequently the torrefying chamber; it being understood that the chimney P
is first removed.
It will readily be understood that other means may be employed to retain the
gear wheel R and stub shaft D₁ stationary, such as employing a square stub
shaft D movably secured in the slot 6 without departing from the spirit of my
invention.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed I declare that what
I claim is:
1. In a torrefier or roaster of the class described, in combination with a heat
box, of a torrefying chamber arranged therein, having a revolution simul-
taneously in two directions.
2. In a torrefier of the class described, a heat-box, a ring journaled therein and
means for revolving the same, a torrefying chamber journaled in the ring at sub-
stantially right angles to the axis of the ring, a stationary gear wheel carried by
one of the ring journals and a gear wheel carried by the torrefying chamber mesh-
ing therewith, whereby the torrefying chamber is revolved simultaneously in two
directions.
3. In a torrefier of the class described a heat box, a ring contained therein
having stub shafts projecting therefrom upon opposite sides thereof, a handle
upon one of the stub shafts, a bail pivotally secured to the torrefier and connected
with the stub shafts, a torrefying chamber journaled in the ring at right angles
to the stub shafts, and a handle upon one end of the bail whereby, when the
handle and bail are lifted, the ring and consequently the torrefying sphere åre
swung out of the heat box.
Dated this 26th day of January 1808
L. DUVINAGE,
Patent Agent, 8, Rue des Princes, Brussels, Belgium.