Coffee Roaster. Page: 5 of 6
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as clearly seen in Fig. 4. In each of the
inner chambers between the partition 33
and the lining 32. are longitudinally disposed
electric heating elements 34 which may be
5 of any approved form. As an example of
a removable. heater element (see Fig.. 6),
a wire 34 extends longitudinally of the
drum at each heating element and is return
bent about a transverse pin 36 on an insu-
10 lating block 37 secured by screws 38 or other
removable fasteners to the front end of the
drum 11, so that the front end of each heat-
ing element can be detached. The heating
elements are passed through the rear end of
15 the drum 11, the numeral 35 indicating in-
sulating knobs at the rear end of each heat-
ing element. The numeral 39 indicates
strips of copper or other suitable metal ex-
tending from the heater elements 34 through
20 the knobs or blocks 35 and extending ra-
dially inward to an insulating sleeve 40 on.
the hub 11a of the drum 11, said strips con-
necting with a commutator or distributing
rings 42, the numeral 44 indicating brushes
25 to contact with said rings. The numeral 43
indicates a flange or collar on the sleeve 40
to exclude dust or chaff from the commuta-
tor and the adjacent ball bearing 20. The
above arrangement of the drum and heating
30 units results in a uniform and effective ap-
plication of the heat by reason of the air
chambers formed between 'the- elements 30,
32 and permits of the ready replacement of
the individual heating elements as required.
35 The numeral 45 indicates a drawer or
sliding receptacle for receiving the roasted
coffee and 46 indicates a drawer above the
drawer 45 having a chute element 47 therein
constituting a dumping bottom. for said
40 drawer 46. The element 47 consists of an
upstanding front member and a bottom
member 47a pivoted as at'.49 to the . sides
of the drawer 46 and articulated as at 48
to the upstanding member. Thus, with the
45 drawer 49 drawn outward as 'indicated in
dotted lines, Fig. 1, the element 47 can be
positioned with the bottom member, 47a
thereof at an incline and 'the upstanding
member at an angle thereto, as indicated in
50 dotted lines, whereby when the door 24 is
open the roasted coffee will be received by
the chute 47 and 'directed to the drawer 45.
The drawer 45 'has a perforated bottom 50
and is elevated above a dust or chaff tray.
55 51 in the bottom of the casing 10. A suc-.
tion fan 52 is suitably mounted on the cas-
ing 10 at the 'exterior here shown as on a
bracket 53 and connects, by a pipe 54 with
the casing 10 at the 'top and by a pipe 55
60 with the casing near the bottom below the
drawer 45. The fan is driven by a belt 56
which runs over a pulley 57 on the drive
shaft 18 and over a pulley on the fan shaft
58. A clutch is provided to establish or
66 'disestablish driving connection between theshaft 18 and the fan shaft, for which pur-
pose, suitable clutch elements 59, 60 are pro-
vided on the shaft 18 and on the pulley 57
and the latter pulley is shiftable, being pro-
vided with a shifting collar 61 and engaged 70
by a shifting fork 62. Said fork is pivoted
as at 63 to a lever 64 between the ends of
the latter; said lever being fulcrumed at
one end as at 65 on the bearing 66 provided
for the adjacent end of the shaft 18, said 75
bearing in the illustrated example being on
a bracket 67 on the casing 10. A compres-
sion spring 68 is. coiled about the shaft 18
between the bearing 66 and the collar 61
and normally tends to maintain the driving 80
clutches in engagement, whereas the lever
64 may be thrown to the position indicated
in Fig. 5 to disengage the clutches and main-
tain the same out of engagement.
The operation of the fan serves to draw 85
off the moisture from the-drum 11 and the
interior of the casing 10 and also serves to
draw off the moist vapors from the roasted
coffee as the latter is passing from the door
24 down the chute 47 to the drawer 45. The 90
fan also creates a current through the
drawer 45 and its perforated bottom 55 and
through the space between the said drawer
and the shaft tray 51. The curved blades
27 serve to thoroughly agitate the coffee 95
while being roasted and when the door .24
is open said blades act to discharge the coffee
through said door to the chute 47.
I would state in conclusion that while the
illustrated example constitutes a practical 100
embodiment of my invention, I do not limit
myself strictly . to the mechanical details
herein illustrated, since manifestly the same
can be considerably varied without depar-
ture from the spirit of the invention as de- 105
fined in the, appended. claims.
Having thus described my invention, I .
claim as new, and desire to secure by Letters
Patent:
1. In an apparatus of the class described, 110
a rotary roasting drum including elements
forming an inclosed annular space extending
about the drum, a zig-zag partition dividing
said space into series of alternate inner and
outer air chambers, and means for heating 115
the chambers of one series.
2. In an apparatus of the class described,
a rotary roasting drum having, a central
roasting chamber and an annular air space
outside of said roasting chamber, a zig-zag 120
partition dividing said space into an annular
series of air chambers, the chambers in the
respective series alternating, and electric
heating elements removably accommodated
in the chambers of one. series. 125
3. In an apparatus of the class described,
a rotary roasting drum having a central
roasting chamber and an annular series of
air chambers about the drum outside of said
roasting chamber, a longitudinal series of 139
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Reference the current page of this Patent.
Shortt, Everett T. Coffee Roaster., patent, May 6, 1918; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1256564/m1/5/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.