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Патент USA US2109597

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March 1, 1938.“
Q s, E, Rlcl-lEsoN‘ -
Fil'ed Aug. 8, 1936
8 Sheets-Sheet 1
SA NFORD E’. Haws: o/v '
March ‘1, ‘1938.
Filed Aug.- 8, 1936
8 Sheetsi-Sheet 2
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March 1, 1938.
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March 1, 1938.
‘ Filed Aug. 8, 1936
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March 1, 1938.
Filed Aug. 8, 1936
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March 1, 1938.
Filed Aug. 8,‘ 1936
8 Sheets-Sheet e
2,109,597 . '
Patented Mar. 1, 1938 a
_ umrso STATES
PATENT voI-‘Flcr.
2.109.591 .
corrnn noas'rm'c monmn
Sanford E. Richeson, New York, N. Y., assignor to
Bicheson Company, Inc., New York, N. Y., a
. corporation of New York _
Application August a, 1936', Serial No. 94,914
11 Claims.
My invention relates to coffee roasting ma
chines and has particular reference to machines
for roasting coffee beans, corn, nuts and similar
products, and more particularly, to machines em
5 ploying electric heaters.
It is a common practice among the large firms
to roast coffee in large roasters and in large
quantities, and to distribute it to dealers who, in
(Cl. 34-5) ~
means for preventing the feeding device from
delivering new portions of thé green coffee into
the roasting chamber when the electric switch is
turned off, but permitting‘the operations of‘ roast
ing and cleaning of the product to be continued 5
to their completion before the machine ?nally
, stops.
turn, sell it to their customers. It‘ is well known, "
10 however, that the roasted coffee deteriorates with
age. Consequently, many coffee concerns seal
Another object of my invention is to provide a
roasting'chamber for coffee, made of a heat re
sisting glass so as to render the green coffee and 10
their coffee in cans and some of them mark on
each can the date of roasting and sealing. This
in an effort to insure the consumer a freshprod
the roasting operation tobe visible from the out
side; also to have the heating unit enclosed or
partly enclosed'in a container made of a heat
’ ‘15 uct.
The obiect of my invention is therefore to pro
vide a small and compact coffee roasting machine
resisting glass of high silica content, and .to pro
vide, a magnifying glass for a window in a com_- 1
partment where the roasted product is delivered
so as to expose it to view.»
The use of refractory glass for the. roasting
which can be used by ordinary grocery stores for V . chamber has certain advantages, as it permits the
roasting co?ee in small quantities as may be re
roasting operation to be observed, it does not rust 20 '
20 quired by their customers.
Another object'of my invention is to provide a
machine whichnot only roasts the coffee, but also
cleans it from chaff and humidi?es the product,
or scale and istherefore, clean and sanitary, it
has a low coeilicient of friction so that'the coffee
can readily ?ow over its surface. Being a poor
heat conductor, the glass holds the heat within
i _ being entirely automatic and operated by electric
the roaster where it is needed and does not heat 25
25 current, so that it can be used for roasting coffee the store. This effect may be further enhanced
by busy clerks in stores with scarcely more skill
or attention than is now required togrind it. 1
Another object of my invention is to provide
means to automatically maintain the required
30 roasting temperature in the roasting chamber
and to automatically charge the roasting cham
ber with a measured ‘quantity of a‘green coifee
when the temperature reaches the desired limit.
by providing the roasting Qchamber with double
glass walls with‘ a space between. them‘ and
evacuating air from this space.
walls can bealso used for the heater enclosure.
My invention is more fully described in the
accompanying speci?cation and vdrawings‘ in
' which
For this purpose I use an electric heater with a
35 thermostatic control and an automatic feeding
device, controlled by the thermostat. _
‘Another object of my invention is to provide '
means in thecoi‘fee roasting machine‘ for clean
ing the roasted product by brushing it over'a
Fig. 1 is a front view of. the assembled machine.
Fig. 2 ‘is a sectional plan view taken on the 35
line 2-2 of Fig. 3.
Fig. 3 man end elevation with the cover re
moved on the line 3-3 of Fig. 2.‘
Fig. 4 is a vertical section taken on the line
40 perforated plate so that dirt, chaff and small
particles of coffee may fall through the perfora
tions and away from the product;_and simultane
ously to blow air through the coffee andthereby
1-4 of Figs. 2 and 5.
45 humidify the coffee by moisture carried in the
.with the roasting chamber tilted to discharge the .
Fig. 5 is a vertical section taken on theline.
5—5 of Figs. 2, 3 and 4.
‘ Fig. a vertical section imilar to Fig. 5‘
.carry away the ?ne dirt and cha?; and ‘to .- as taken on the line 5-_-.! of Figs. 2, 3 and 4, but 45
air current.
Another object of my invention is to provide
means for automatically dropping the coffee from
the roasting chamber after expiration of a pre
. 50 determined time, onto the perforated plate; and,
after a predetermined time of brushing and clean
ing on the plate, to drop it into a bottom hopper,
from‘which it can be scooped out as the ?nished
roasted, cleaned and humidi?ed product.
55 ' ' Another object of my invention is to provide.
coffee, and with the frame casting 48 broken away
to show the parts beyond.
, '
, ’
Fig. 7 is a vertical section taken on the line
'|—'I of Figs. 2, 3 and 4.
50 .
Fig; 8 is a detail ‘view taken on the line 8-48
of Fig. 2.. Fig. 91s a. wiring diagram. _,
Fig. 10 is a sectional view taken on the line
01-!!! of Fig- 11-
_ 2,109,505?
Fig. 11 is a vertical sectional view taken on the
I line ll—l| ofFizs. 5,7
and 10.
casting 66 and the roasting chamber 26 ‘tilt to
ward the right about the pivot 69, and the door
Fig. 12 is a plan view of the cam shaft and
54 opens,asshowninFig.6andaswill alsobe
hereinafter more fully explained. With the
roasting cylinder 26 inclined and still rotating,
the coffee slides from it through the open door
Figs. 2, 3 and 4, showing air currents, the humidi
56, down through an opening 66A in the casting '.
. ?er and filters
The identical parts are indicated by the same 66, and into the cleaning pan 66. The pan 66 is
.10 numerals in the drawings, and different ends or circular with a perforated bottom 68A, and a
portions of the elements are indicated by the portion of its wall 663 is of wire gauze, as shown 10
in plan in Fig. 2 and in the vertical section Figs.
numerals’ with added characters.
The machine comprises. two vertical lower 5 and 6. A brush 66 is rigidly mounted on a
chambers 55 and 56 resting on the floor, with a vertical shaft 16. ‘It has stiff wire bristles pro
15 pipe 51 connecting them as shown in Fig. 14. jecting from its under side, and they sweep the
coffee over the perforated plate 66A. At the same
This carries a vertical wall 59 enclosing a cham
a fan 1| pulls air through the gauze sec
bar, and wall 53 supports an intermediate plate tion 668,
down through the coffee being swept,
casting 66, this part of the machine being ellipti
down through the perforated plate 66A, into the
cal in form asshown in Fig. 2. On one end of
fan intake "A and through the fan itself, as
the plate 66, the right as shown in the drawings, shown
in Figs. 5, 6, 13 and 14. The dirt and
is a vertical cylindrical wall 6| enclosing a cham
chaff fall through the perforations by gravity and 20
ber circular in plan, and the wall 6| carries a
are carried by the air‘ current. The larger
top plate casting 62. Plate 62 carries a cylindri
particles lodge in the chaff pan 12, Fig. 5,
cal receiving hopper-63, made of a refractory
Hg. 13 is a vertical sectional view of the lower
part of the ‘machine taken on the line 5—5 of
' which can be periodically withdrawn and emptied.
_ glass, such as Pyrex, with a removable cover 66.
A small portion 12A of the chaff pan, 12 is parti
Projecting from the chamber 6| over the ‘left
portion of theplate 66, is a. cylindrical horizontal
tioned off and has a gauze bottom, permitting
the passage of the air current as shown in Fig. 13.
' glass roasting chamber 26, as'shown in Figs. 1, 2,
15,5, 7, 10 and 11, and as will be further herein
after explained.
The liner lighter dust and dirt go through with
The machine is driven by an _
electric motor 36 through a worm 3|, worm gear
‘32, chain 33 and sprockets 34 and 35.
The principal steps 'in the roasting operation
are as follows: the receiving hopper receives the
green or raw coifee. From there it falls into a
measuring hopper 22, admitted thereto by a slid
ing door 23. The door 23 then closes and the
sliding door 26 opens, discharging a hopperful of
coffee into thechute 25, as shown in Figs. '7, 2
40 and) 4. From the chute 25 it slides between three‘
the air current to the fan.
‘A door portion'66C of the bottom of the pan 66 j
is not perforated and is hingedly supported on a
part 66D. After a predetermined period of clean
ing, the door 66D'opens; the brush 69 sweeps
the coffee over it, and the roasted and cleaned
coffee falls through the open door 660 into a chamber 13, whence it ‘can be scooped out by a
scoop 16.
‘The mechanical moving parts'of the machine ‘
are operated by an electric motor 36 mounted on
an intermediate casting 36, the latter being se
cured to the plate casting 66. The motor shaft
chamber 26. ‘ In the chute 25 it is agitated and _
worm 3| in mesh with a worm gear 32, the
aided in its sliding movement by an'oscillating has a being
on the same shaft with a sprocket 34 '
arm 21 pivoted at the bottom of the chute. The latter
-45 arms‘ 31A are inclined in a. propeller fashion so connected by'a chain 33 with a sprocket 350m a
16. The shaft 16 has ‘a worm 19 driving 45
that by their rotation they push the coffee to the ashaft
gear 66. The latter turns freely on a
left in Fig. 7 into the cylinder 26.
‘cam shaft 6| journaled in-bearings 89 and 86
- The roasting chamber or container 26 has a
mounted in housings 6| and 92. Rigid with the
double wall made of a refractory transparent wheel 66 is one half 62 of a jaw clutch. A gear
materialsuch as high silica glass like Pyrex, and “also turns freely on the camshaft 6|, and
the space between the walls may be evacuated. rigidly connected with the gear 66 is the other
‘It is heated by an electric heating coil 26 wound half 63 of the jaw clutch. A lever 93 shifts the
spirally .on a porcelain ‘core 26. This is partly .gear 66 longitudinally of the cam shaft 6| to en
surrounded by a glass case 66, the latter also hav
gage and disengage the clutch 02-43, as will be
‘ing double walls with vacuum between them. hereinafter
more fully explained. The gear 66
They are mounted on a stationary pipe 6| by drives the gear 65 which is rigidly attached to
flanges 62 and 63.
longitudinally of the cylindrical roasting‘ the shaft 66 by a key or other suitable means.
arms 31A into the rotating cylindrical roasting
chamber 26 and on the walls'thereof, are two bars
66, shown in Figs. 5, 10 and 11, and these carry
vanes or agitators 65 inclined as in Fig. 5. As
the cylinder and the vanes rotate arrow-wise,
with the heater 66 stationary,'the vanes stir the
coifee and carry it from the entrance at the right,
shown in Fig. '1, toward the opposite end of the
cylinder._ The heater casing if is mounted out
At its opposite end, the shaft 66 carries a gear
‘61 rigidly mounted‘ on‘sit, this gear being in mesh
with a gear 66 keyed or otherwise rigidly ?tted
on the cam shaft'6l. Through the gearing de
scribed, the worm gear 66 drives the cam shaft
6| when the clutch 62-63 is in engagement, and
then only. A fulcrum shaft | 66 is held rigidly
in‘ bearing members Ill and L62 mounted in
housings 6| and 32, and on the shaft I66 there
of the path of the moving material so as to' pre‘-"
vent the coffee to be roasted -by direct contact are mounted several levers to be later described.
The frame casting 66 has a leg “A which is
with the cover of the heater. .
on a. stationary pin 63 as above described
Theroastingchamber 26 isheld by a ball bear
and shown in Fig. 5.
ing" in ermine casting“ asshownin-Flg. 5 v A frame member I66 is rigidly attached to. the
be hereinafter further explained. casting 66 by screws I61. A pipe 6| is rigidly ?xed
The casting 66 has a bottom leg “Awhich is in the frame member I66 having a screw thread
pivoted on a stationary pin 66-. When the coffee 4 IA; and an eye-bolt m is screwed into the frame
has bem'roasted as above described, the frame
member at or otherwise ?xed rigidly thereto.
A cam I83 on the cam shaft 8| actuates-the lever
I84 which is pivoted on the fulcrum shaft I88,
and the lever I84 is ?exibly connected to the eye
bolt I88 as by a link I85. As the shaft 8I and
cam I83 rotate in the direction of the arrow then,
acting through the members just- described, they
tilt the frame casting 48 and pull it from its posi
tion in ‘Fig. 5 to its position in Fig. 6. A heater
' 28-29-48 is rigidly attached to the pipe M, as
10 set forth hereinbefore and shown in Figs. 10 and
The lever I28 is ?exibly connected to the door 54
by a link I32, and as the lever I28 is pressed to
the right, it pulls the door 54 open. As the roast
ing cylinder moves back to horizontal position, a -
spring I33 pulls the door shut.
A cam I48 is rigidly mounted on the rotating
hollow shaft 58, as shown in Fig. 5. It engages a
pin I“ on a. lever I42. As shown in Figs. 2 and
4, the levers I42 and I43 are rigidly mounted on
‘a small shaft I44, which oscillates in a bearing 10
in' the arm 48D of the frame casting 48, as the
cam I48 ‘rotates. The lever I43 is ?exibly con
nected to a lever I45 by a link I48, and the
I45 is connected to an arm 25A of a chute
H. The opposite end of the pipe _4l is plugged.’ lever
25 by a spring I49. The lever vI45 and the arm 21 15'
are rigidly mounted on a small shaft I58, which
15 A ?exible air hose I38 runs from the outlet of the
fan 1I through the cap H9. The air current oscillates in a bearing I5I on the bottom of the
11. And as the pipe H is held rigidly to the
frame casting 48, the heater does not rotate.
' A cap 'I I9 is screwed over the end of the pipe
from the fan is driven thence through the pipe chute 25, as shown in Figs. 2, 4 ‘and '7, Through
4I and out through holes 4IB to the heating coil
these means, the cam I48, as it rotates, oscillates
29 within the glass case 48, as shown in Figs. 5, -the
arm 21 in the chute 25, agitating the coffee 20
and~ aids it to slide down the chute into ‘
mitted out into the roasting chamber 28 to de
the roasting chamber, as hereinbefore described.
liver its heat'to the coffee. Electric wires I39 also
A cam I52 on the cam shaft 8I actuates a lever
pass through the cap H9 and through the pipe I53 which is pivoted on the fulcrum shaft I88.
H to the heating coil 28.
The lever I53 is ?exibly connected to the sliding 25
As shown in Fig. 5, the outer member 41A of door 23 by a hinge I54. Through these means,
the ball bearing 41 is ?xed in the casting 48 and the cam I52, as it rotates, pullsopen the sliding
is held rigidly in its place by a plate 48 screwed door 23 and admits the green coffee from the
into the casting 48, The inner'member 41B of receiving hopper 83 into the measuring'hopper
the ball bearing 41 is ?tted rigidly onthe hollow 22 as mentioned hereinbefore.
shaft 58, the latter being thereby rotatably sup.
A clock‘l58 is mounted on the plate casting 58.
ported on the ball bearing 41. A gear 5I on the An arm I53A is rigidly connected to the lever
shaft 58 serves to rotate the latter,_ as will be
I53 and is flexibly connected to a hand I58A by
hereinafter described.
Rigidly attached to the hollow shaft 58 is a
35 spider 31, comprising av hub 31B and a rim 31C.
The outer and inner glass cylinders 28A and 28B
of the roasting chamber 28 are fitted and ce
mented to the rim 31C. The two~cylinders are
?tted and cemented to the rim 38. The metal
rims and glass cylinders are held securely to
gether by bolts 39. The cylinders form an ~air
tight space between‘them which may be evacu
a link I51. The hand I58A is rigidly connected
with a drum I58B, the latter being connected 35
with one end of a spring I58C. The other end of
this-spring is connected to a stationary pin I58D.
Thus as the cam I52 pushes the lever I53‘ back
to‘ the right to open the sliding door 23, it simul
taneously turns the hand I58A and the drum 40
I58B and winds the spring I58C. The lever I53‘
moves quickly back and closes the door 23, but
‘the hand I58A is connected to an escapement
ated. The end of the roasting chamber 28 is I58E and runs for a predetermined interval, for
sealed by metal plates I89 and IIII with an in
instance, '7 minutes. The purpose of the clock 45
sulating packing III of asbestos or other'suitable will be explained later in connection with the
material between them. A plate _II2 covers the wiring diagram.
end of the chamber and is held in place by a
A cam I58 on the cam shaft 8! actuates a lever
bolt H3 which may slide non-rotatably in the
I88 which is pivoted on the fulcrum shaft I88.
plate H8, compressing the spring II4'as a ball The
lever I88 is ?exibily connected to a sliding 50
I I5 is screwed on its end. The arms 31A of the door 24 by a link IBI. Through thesemeans, the
spider are’spaced apart to let the co?ee slide cam I59, as it rotates, pulls open the sliding door
between them, and are inclined to move the coffee
23 after the vsliding door 23 has closed, and dis_
to the left as they rotate, ashereinbefore set charges a hopperful of coffee from the measuring
forth. A plate H8 is fastened to the frame'cast
hopper 22 onto the chute 25. A spring I82 pulls
55 ing 48 by screws H8 with asbestos or other in
24 shut.
sulation H1 between them to‘conserve the heat. theAdoor
cam I84 actuates a lever I85 which is pivoted '
. A gear I25 on the worm shaft drives an idle
gear I25, the latterdriving a gear 5I and thereby
driving the hollow shaft 58 and the roasting
60 chamber 28, as shown in Figs. 2 and 4. The idle
gear- I26 is carried by the am 483 of the frame
" casting 48 and tilts with this casting. Thus it
A is that the roasting chamber 28 rotates, while the
heater unit 28-29-48 is non-rotatable. _ After
the cam I83 has tilted the roasting chamber as
shown in Fig. 6, the weight of the chamber brings
it back_to the horizontal position of Fig. 5. A
spring 138 overcomes the weight partially and
aids the cam and the driving mechanism. 7
A door‘54 is pivoted on a pin I21 ?tted in the
frame casting 48 as shown in Figs. 4, 5 and 6.
Lever I28 is pivoted on a stationary pin I29, A
pin I3I ‘is ?xed rigidly in the leg 48A of the cast
_ 48, and as the casting 48 tilts, the pin I3I
presses the lever I28 to the right as in Fig. 6.
on a pin I88 in an arm 38A of the supporting
casting 38, as shown in Figs. 5 and 3. The lever
[85 is ?exibly connected to a door 88C in the bot 60.
tom of the cleaning pan 88 through a link I81, bell
crank lever I88 and link I89. Through these
means, the cam, I84, as it- rotates, pulls open the
door 880 and dischargesthe co?ee, roasted and
cleaned, from‘ the cleaningv pan 88 into the cham
ber 13. Spring I18 then pulls the door 880 shut.
I A pulley I13 is rigidly mounted on the worm
shaft 18 and is connected by a belt and idle pulleys
I15 with a pulley-I14 on ashaft 18. _ The shaft 18
drives the brush 88 for cleaning the coffee.
The bottom parts of the machine are shown in
Fig. 14; Underneath the fan there is a. chamber
55A ?lled with steel wool or other ?lter. Beneath
the chamber 55A is-a chamber55B, with a horie
zontal partition 55C dividing the two chambers.
_. The. chamber 553 ‘holds a reservoir of water I86
in its'bottom, with a valve I8I and'?oat I82 to
supply water and ‘regulate its depth. Cloth cur
tains I89 are supported from‘the partition 55C
and dip into the water. The lower portion of the
chamber 56 and around the end of the pipe 51 is
?lled with charcoal or similar ?ltering and puri
fying substance 56A. The upper portion of this
chamber is ?lled with steel wool or similar ?lter
10 ing material 563.
reach theirvproper roasting temperature, such as
202° C. When, however, the required tempera
ture isreached, the thermostat I 91 makes the
electrical contact, solenoid I95 is energized, the
shaft 8I~rotates and the sliding doors 29 and 26
open and close,.thereby admitting a hopperful of
coffee to the roasting chamber 26.
. It is necessary that the co?ee shall remain in
the roasting chamber through a' predetermined
A chamber I19 above the plate
58 is ?lled with steel wool also.
' interval, and this is accomplished as follows.
The fan ‘II is direct connected to the motor mercury switch I98 is mounted on a lever I99,
39 as shown in Fig. 3. It discharges downward pivoted on a stationary pin 266, actuated by a
. through the steel wool in the chamber 55A, and cam 29I on the cam shaft 8|, as shown in Figs.
15' thence through the cloth curtains I89. The water 7 and 9. A‘spring 292 closes the switch; the cam
from the reservoir below saturates these curtains - opens it. The electric current can ?ow through
wires I98A and i983, through the switch I98 and
thus complete the circuit through the solenoid
I95. Current can also flow through wires I561?‘
through capillary attraction. The air passes
thence through the pipe 51, through the charcoal
56A and again through the steel wool in the
20 chambers 56B and I19. The steel wool and the
and I56H of the clock I56 and thus complete the
circuit through the solenoid I95. .If either the >20.
clock switch I56 or the mercury switch I98 is
closed, thesolenoid can be energized. Now when;
open at the top and bottom, serves as a vent. A ‘ the. lever I59 moves to the right and opens the
25 small part of the air passes out thence-while door 29, it windsthe clock I56 and also opens the
the bulk of it, cleaned and moistened, returns clock switch I56, as shown in Figs. '7 and 9. But
to the pan 68 to clean more coffee, as shown in , current continues to ?ow through the mercury
switch I98 and the solenoid I95 remains energized
Figs. 14, 5, 6 and 13.
. r
i i
A solenoid I95 is ?exibly connected to a lever 93 until the cam 29I opens that switch. Then the
solenoid 195 is deenergizedand the spring I96
30 by a link I96. With the solehoid not energized,
the clutch 82-89 (Fig. 3), and the
a spring I 96 holds the lever 99 and the gear 86 disengages
cam shaft‘ stops.
to the left and the clutch 82—89 disengaged, as
shownvin Fig.‘ 3. In this position, the motor 90
runs without turning the cam shaft or the cams ' horizontal position ‘in order to shutoff the cur- thereon. When the solenoid I195 is energized, it rent and stop the machine, it is necessary that
pulls the lever 93'and the gear 86 to the right, it does not stop at once, but that it ?nishes roast 35
engaging the clutch._82—-89 and turning‘ the‘ ing and cleaning the coffee already within it.
cloth ?lter out the ?ne dirt brought in the air
current from the cleaning pan 68, and the water
in the cloth humidi?es the air. A drawer I84,
shaft 8|.
This is accomplished as follows:
A bimetallic thermostatic element I91 is sup
ported within the roasting chamber 26 as shown
in Figs. 10 and 11. It closes an electrical contact?
at a predetermined temperature, for instance,
202° C. This conducts the electric current to the
clutch‘ 82-89.
A switch is provided for con- '
_ switch shaft I99 carries" a mercury switch. I92,
' the shaft having a handle I9I for its manual op
and a lever 261 is adjacent to the lever.I59, as
shown in Figs. 7,2 and 3. In the normal opera
tion of the machine, the cam I52 engages and ac
tuates the lever I59 and sliding door 29 to admit
‘Solenoid I95, energizing it, thereby engaging the
necting the machine with a supply circuit.» A
A mercury switch 266,. is carried and actuated
by a lever .26‘! carried on the fulcrum, shaft I66,
green coffee. Referring to the wiring diagram
Fig. 9, if the handswitch I92 is closed, electric 46
current. may ?ow through 'it and through the.
wires I92A and I923, from an outside source to
"eration. The handle in the drawings is shown the heater 26, motor 96 and-other parts of the '
horizontal, in which position the mercury‘ is away -machine as described. Now ‘if the automatic
from thewires and the switch is open. {To start switch 286 is closed, current may also ?ow through
it and through the wires 266A and 2668 from the
the machine, the operator ?lls' the receiving hop
per 69 with green coffee and turns the handle 9 same outside source to the heater, motor and
I9I into the vertical position. The mercury flows other parts of the machine. Thus if either hand
switch I92 or the automatic switch 266 is closed,
current may ?ow into the machine and actuate
ering the wires I92A and I92B and thereby clos
ing the switch to conduct the electric current to
_..The handle m ,is rigidly fastened on the shaft‘
the machine, as shown in Fig. 9‘. -The current
6, the ‘latter carrying a cylindrical cam 266, as flows to the heating coil 28 through wires 28A
and 26B, and heats the roasting chamber. The ‘shown in‘ Figs. 'I, 2 and 3. The cylindrical cm
motor 96 receives the current through wires 96A, 269 actuates a lever ,2 I6 which is pivoted on a sta
fulcrum pin 2“ on the housing 92. The
96B and rheostat 96C, starting to rotate. The tionary
right hand end of thecam shaft 8| is bored longi
motor, through the worm 9| and gear 92, sprockets I‘ tudinally.
Pins 2I6A of the'lever- 2I6 ?t in the
. 86 and 38, chain 99, shaft ‘I6, gears I28, I26 and
groovev 2I2A of the lever 2I2 and slide said lever
5 I , and hollow shaft 56, rotates the roasting cham
2I2 to therlght or left within the bore ofthe cam
ber 26.
i‘shaft n. 'rne cam in is pinned to the shaft
The shaft 18, through the pulleys nun. m. 1m
by a pin ms. and this pin may sliderto, ‘
and belt I16, rotates the brush I69 over the per
or left ‘in the slot "A, as shownllin
forated plate 66A’. However, until ‘the thermo
88 stat I61 is heated to its predetermined tempera: Fig. 8.
56 then to the right hand end of the tube I92, cov
current cannot ?ow past it to energize ' _ Thus, when the handle "I is vertical and the 70
the solenoid I96 or to open ‘the sliding, door, 29 machine is running, the shaft 2I2 'isin its left
and admit coifee._ 'Iherefore, no coffee passes hand position, shown fully in Hg. 12, and the cam
I82 engages the lever I59, ‘opens the sliding door
down the, receiving hopper 69 until the thermo
stat, and
chamber-26, 29 and ‘admits coifee to the machine. When the
handle "I is horizontal, the shaft 2I2 is pulled
means to deliver a raw material into the cylinder,
an electric heater in the cylinder adapted to heat Y
the air for roasting the material, means to re
out to its right hand position, and the cam I52,
, shown in dotted lines in Fig. 12, no ‘longer en
. gages the lever I53 but engages the lever 201. The
?rst eifect, then, of placing the lever MI ‘in the
horizontal position, is to leave the door 23 shut
move the roasted product from the cylinder, 9.
receiving container for the product, a container
so that no more coffee can enter the machine.
with a ?ltering material, a container with an air
humidifying and washingv material, means to
circulate air through the roasted hot product in
the receiving container, through the ?ltering
materiaL' and through the cylinder .over the 10,
Placing, it horizontally also opens the hand switch
I92 so that current can no longer ?ow through
it to the motor- and other working parts. But so
10 long‘ as automatic switch 206 is closed, current
can ?ow through it, and the machine continues
to run. It continues to run until the cam I52
throws the lever 201. and thereby opens the auto
matic switch 206, and the parts are so arranged
5. A coffee roasting machine comprising a
roasting cylinder, a tubular extension on one end
of the cylinder, a bracket rotatively supporting
the tubular extension, means'to rotate the cyl 15
inder by its tubular extension, a tubular rod ex
tending into the cylinder through the tubular
extension, an electric heater supported on the
rod in the cylinder, a casing partly enclosing the
rod and the heater, the casing being made of a 20
material transparent to radiation and resistant
that this occurs at the end of the cycle when a
given roasting and cleaning operation is com
' I claim as my invention:
1. A coifee roasting'\niachine comprising a hous
20 ing, a hollow shaft, means‘ to inclinably support
the shaft in the housing,.a spider rotatively sup
ported on the shaft, a roasting cylinder supported
by one end on the spider, the other end of the cyl
inder being closed, a hollow rod passing through
to heat‘ conduction, means to force air into the
casing through the rod, means to deliver -a raw
material into the cylinder, and means to remove
the shaft into the cylinder and supported by its ‘the roasted product from the cylinder.
6. A coffee roasting machine comprising a
outer end in the inclinable shaft support, an elec-»
tric heater in the cylinder supported on the rod; roasting cylinder, a tubular extension on the cyl
a stationary cover for the spider end of the cyl-~ '= inder, a bracket rotatively supporting the exten
inder, a door in the lower portion of the cover, sion, a frame supporting the bracket, an electric ‘ '
motor supported on the frame, operative con
30 means to open the door by the inclining movement
of the cylinder, a discharging chute under the nections between the motor and the cylinder ‘ex
door, a loading chute in the cover, means to rotate tension, the cylinder being adapted to be inclined
the cylinder, means periodically to deliver charges . on the bracket, means operated by the motor for
inclining the cylinder, the connections between
of a raw material into the cylinder through the
35 loading chute, means to control the length of the motor and cylinder being adapted to remain
time of roasting, means to incline the cylinder to- '
ward the rear at the expiration of theroasting tion to the motor, means to deliver a raw mate.
period thereby opening the door for discharging rial into the cylinder, means to force air into the '
cylinder, means to heat the air for roasting the
the roasted product, and means to clean the dis
charged product.
. material, means to dischargethe roasted product
2. A coffee roasting machine comprising a hous
when the cylinder is inclined, and means to con
ing, a hollow rod supported in the housing, g"a
hollow shaft rotatively. supported on the rod, a
trol the intervals of time between the charging
and discharging operations.
'7. A co?ee roasting machine‘ comprising a
spider supported on the shaft, a roasting cylinder
45 supported by one end on the shaft, means to ro—_
tate the shaft with the cylinder, means to deliver
a raw material into the cylinder, an electric heat
er supported on the rod in the cylinder, a casing
partly enclosing the rod and the heater, the rod
50 being provided with apertures in the casing,
means to deliver air through the rod and through
the casing intp the cylinder for roasting the ma
roasting cylinder, a tubular extension on the 45
cylinder, a bracket rotatively supporting the cyl
inder, a frame, the bracketbeing rotatively sup-'
ported on the frame and adapted to be inclined _
with the cylinder, an electric motor supported
on the frame and operativelyconhected with the 50
extension for rotating thev cylinder, an'electric
heater in the cylinder, a casing partly enclosing
terial, means‘ to discharge the roasted product the heater, means to deliver a raw material into
from the cylinder, and means to control the length , the cylinder, means to blow air into the cylinder
through the casing over the heater for roasting 55
55 of time between the discharging operations.
3. A coffee roasting machine comprising a the material, a cam shaft rotatively supported
housing, a bracket rotatively supported 'in the on the frame, a clutch connecting the cam shaft
housing, a hollow shaft rotatively supported in the with the motor, a; magnet controlling the clutch,
a thermostatic'element in the ‘cylinder adapted
bracket, a spider supported on the-shaft, a roast
to control the magnet, means to operate the ma—
60 ing cylinder supported by one end on the spider, a
hollow rod passing through the shaft into the terial delivering means by the cam shaft, a clock
cylinder, an electric heater on the rod, means to mechanism, means to render the clock operative
deliver a raw material into the cylinder, means‘to by the material delivery operating means, a
.rotate the cylinder, means to deliver air into the switch on the clock adapted to disconnect the
magnet circuit when the clock begins to operate, 65
65 cylinder through therod, means to cause the air and being adapted to be closed by the clock at
to flow around the heater before it enters the cyl
inder for roasting the coffee, and means to in?‘ = the expirationof a predetermined period of time,
cline the bracket -with the shaft and the cyl - and means operated by the cam shaft for inclin- '
inder for discharging the roasted product, said
rotating and" said air delivering means being
ing the cylinder for discharging the roasted
product when the magnet is rendered operative
adapted to remain operative when the cylinder is .by the clock mechanism. ~
in the inclined position.
' -
8. A coffee roasting machine W comprising a
4. A coffee roasting machine comprising a 'roasting cylinder, means‘ to rotatively support
housing, a roasting cylinder rotatively supported ‘the cylinder,- means to rotate the‘cylinder, a '
76 in,the1housing, means to rotate the cylinder, feeder adapted to deliver a raw material into the
cylinder, means to roast the material in the cyl- ,
inder, means to discharge the master product
from the cylinder, a camimechanism adapted to
operate the feeder by the cylinder rotating
means, a manual means to control the motor and
the roasting means, and a'cam-operated means
to control the motor and
means, the
manual means being adapted to render the cam
operated means operative until the roasting and
10 discharging operations are completed and when
the manual means is placed in the inoperative
9. A co?ee roasting _machine comprising a
roasting cylinder, means to rotatively support
15 the cylinder, means to rotate the cylinder, a
feeder adapted to deliver a charge of a raw ma
terial into the cylinder, an electrical means to
roast the material in the cylinder, means to dis
charge the roasted product from the cylinder, a
20 clock mechanism, means to wind the clock mech
anism during charging operation of the feeder,
the clock being adapted to run for a predeter
mined period of time after being wound, means
to render the feeder and the discharging means
25 inoperative for a predetermined period of time
10. A coifee roasting machine comprising a
roasting cylinder, means to rotatively support
the cylinder, 9. motor adapted to rotate the cyl
inder, a feeder adapted to deliver a charge of a
raw material into the cylinder, an electric heater
in the cylinder for roasting the material, means
to discharge the roasted product from the cyl
inder, a manually operable switch for the motor
and heater, a supplementary switch for the motor
and heater, means to operate the feeder by the 10
motor, and means to transfer the feeder operating
means to the supplementary switch by the man
ual switch being placed in the inoperative posi
tion, the supplementary ' switch being adapted
to be disconnected upon completion of the last
roasting and discharging operations.
11. A co?'ee roasting machine comprising a
roasting cylinder, means to roast the material in
the cylinder, means to discharge the roasted
product from the cylinder, a container for the 20
hot discharged roasted product, means to remove
the chaff from the product in the container, '
means to suck air through the product in the '
container, means to prevent the greater portion
of the chaff from being entrained, by the air, 25
by the clock, a‘ manually operable switch for the. means _to ?lter and to wash the exhaust air,
cylinder rotating means and material roasting means to remove smoke and vapors from the ex
means, and means to maintain the ‘roasting and
rotating means operative until the last roasting
30 and discharging operations are completed when
the manual switch is placed in the inoperative
haust air, and means to return the puri?ed air to
the product in the‘container.
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