Coffee Roaster. Page: 4 of 6
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IJNIThD STATESPATENT OFFICE.
EVERETT T. SHORTT, OF DALLAS, TEXAS.
COFFEE-ROASTER.1,299,245.
Specification of Letters Patent.
Patented Apr. 1, 1919.
Application Sled May 6, 1918. Serial No. 232,793.
To all whom it may concern:
Be it known that I, EvERrn T. SHoRrr, a
citizen of the United States, and a resident
of Dallas, in the county of Dallas and State
5 of Texas, have invented a new and improved
Coffee-Roaster, of which the following is a
description.
My invention relates to roasters especially
designed for roasting coffee. More particu-
10 larly the invention relates to roasters of the
general form illustrated in United States
Patent No. 1,122,651,,granted to me Decem-
ber 29th, 1914, which, among other things,
is characterized by a roasting drum self-
15 contained with respect to its heating means
and by a suction means, the heating means
of the self-contained drum consisting of
electric heating elements thereby doing
away' with the noxious fumes and products
20 resulting from ordinary heating means, and
the suction means serving to draw off the
moist vapors driven out of the coffee beans.
General objects of the present invention
are to provide a roaster, the use of which re-
25 sults in important advantages among which
are a sanitary system of roasting coffee and
an increased conservation of the strength of
the coffee over ordinary roasting methods.
Advantages of the present construction
30 also, are an efficient application of the elec-
tric heat as well as an effective agitation of
the coffee while roasting, whereby with the
improved arrangement of the heating means
a more even and uniform roast results.
35 A further object of my improved con-
struction is obtained in utilizing the agitat-
ing means of the drum to effect the dis-
charge of the roasted beans.
The present invention is characterized
40 also by a novel means and manner of direct-
ing the roasted coffee from the drum to the
receiving drawer therefor with the inci-
dental subjection to an air current, of the
roasted coffee as it is being dumped as well
45 as after being dumped.
Reference is to be had to the accompany-
ing drawings forming a part of this-specifi-
cation, it being understood that the draw-
ings are merely illustrative of one example
50 of the invention.
Figure 1 is a longitudinal vertical section
of a coffee roaster embodying my invention;
Fig 2 is a front end view thereof;
Fig. 3 is a rear end view, parts being
55 broken away and others in section;
Fig: 4 is a transverse vertical section onan enlarged scale through the heating drum
and the upper part of the casing, the view
being taken on the line 4-4, Fig. 1;
Fig. 5 is a detail sectional side elevation 60
of the clutch employed on the drive shaft;
Fig. 6 is a fragmentary sectional view
illustrating one manner of detachably se-
curing an end of a replaceable heating ele-
ment; 65
Fig. 7 is a diagram of the electric heat-
ing circuit.
In constructing a practical embodiment of
my present invention a suitable casing 10 is
provided in which a drum 11 is horizontally 70
arranged and carried on a shaft 12. One
end of the shaft turns in ball bearings 13
in a head 14 on said casing, said bearings
having a dust cap 15. At the opposite end
of the shaft the same has keyed thereon a 75
worm wheel 16 meshing with which is a
worm 17 on a drive shaft 18, exterior of the
casing 10 and driven preferably by an elec-
tric motor 19 mounted on a bracket 191 on
the casing. The shaft adjacent to the worm 80
16 turns in a ball bearing 20, a casing 21 in-
closing the wheel and worm, said casing be-
ing suitably secured tothe main casing 10 by
-bolts 22 or the like. In the head 14, which
is at the front of the machine, there is a door 85
23 at one side of the shaft 12 through which
the drum 11 may receive a charge of coffee
to be roasted, and at the opposite side of the
center of said head a second door 24 is pro-
vided through which the coffee is discharged 90
as hereinafter explained. Said door 23 'is
provided with an opening ordinarily closed
by a pivoted disk 25 through which opening
a sampling scoop may be entered for testing
the coffee. The drum 11 is supported on the 95
shaft 12 by spokes 26 or equivalent means
and these serve also to secure an annular
series of curved blades 27 for agitating the
coffee and causing the roasted coffee to be
discharged. 100
The drum 11 in the illustrated form com-
prises an outer sheet metal shell 29 and a
second sheet metal shell 30 at the interior
of the shell 29. and spaced therefrom, there
being between said shells heat-insulating 105
material 31. The cylindrical sheet metal
lining 32 of the shell is spaced from the
shell 30 and the intervening annular space
accommodates a zig-zag sheet metal parti-
tion 33 which divides the.said annular space 110
alternately into inner and outer air cham-
bers extending longitudinally- of the druum
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Shortt, Everett T. Coffee Roaster., patent, May 6, 1918; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1256564/m1/4/: accessed May 25, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.