IMPROVEMENTS IN COFFEE ROASTERS
Year: 1883

page_text: LETTERS PATENT to Gustav Heinrich Pfeifer of the City of Freiberg in the
Kingdom of Saxony and German Empire for an Invention of "IMPROVEMENTS
IN COFFEE ROASTERS"
PROVISIONAL SPECIFICATION left by the said Gustav Heinrich Pfeifer at
the Office of the Commissioners of Patents on the 22nd March 1883.
GUSTAV HEINRICH PFEIFER of the City of Freiberg in the Kingdom of Saxony
and German Empire "IMPROVEMENTS IN COFFEE ROASTERS"
My Invention relates to improvements in Coffee Roasters and consists of a drum
or cylinder of sheet iron or other suitable material.
The axis of the said drum or cylinder of sheet iron or other suitable material, in
which a steel bolt or rod previously heated to red or white heat is inserted.
The drum or cylinder is rotated by means of a suitable crank and is mounted on
a suitable frame.
In order to be able to manipulate the glowing bolt or rod I employ a suitable
hook which is inserted in a hole or boring in the one end of the bolt or rod
arranged for such said purpose. A glass slide is so arranged that the progress of
the roasting can be observed and also a slide for filling and emptying the drum.
Projecting wings for turning the coffee in the drum are suitably arranged.
The operation of the roaster is extremely simple, the same requires no special
heating, occupies a very small space and the roasting can be carried on in any
suitable place.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent and of
an Order of the Lord Chancellor filed by the said Gustav Heinrich Pfeifer
in the Great Seal Patent Office on the 15th October 1883.
GUSTAV HEINRICH PFEIFER of the City of Freiberg in the Kingdom of Saxony
and German Empire" "IMPROVEMENTS IN COFFEE ROASTERS"
My Invention relates to improvements in Coffee Roasters and consists of a drum
or cylinder a of sheet iron or other suitable material.
The axis of the said drum or cylinder a consists of a hollow, cylinder of sheet
iron or other suitable metal in which a steel bolt or rod c previously heated to red
or white heat is inserted.
The drum or cylinder a is rotated by means of a suitable crank and is mounted
on a suitable frame d.
In order to be able to manipulate the glowing bolt or rod c I employ a suitable
hook which is inserted in a hole or boring in the one end of the bolt or rod c
arranged for such said purpose.
E is a glass slide so that the progress of the roasting can be observed, fris a
slide for filling and emptying the drum a, g g are projecting, wings for turning the
coffee in the drum a.
The operation of the roaster is extremely simple, the same requires no special
heating, occupies a very small space and the roasting can be carried on in any
suitable place.
Having now described my said invention and the manner in which the same is
to or may be carried into effect I desire it to be understood that what I claim and
desire to secure by Letters Patent is
-
Heating the drum a of the Coffee Roaster by means of the glowing bolt or
rod c which said glowing bolt or rod c is introduced into the hollow axle b of
the said drum of the Coffee Roaster substantially as described and shown in the
accompanying drawing
In witness whereof I the said Gustav Heinrich Pfeifer have hereunto set my
band and seal this eighteenth day of September in the year of Our Lord One
thousand eight hundred and eighty three.
CITHOUT A V
UGINRICH DINETTER