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Патент USA US2613594

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Oct. 174, 1952
Filed Aug. 19, 1948
5 Sheets-Sheet 1
Oct. 14, 1952
Filed Aug. 19, 1948
5 Sheets-Sheet 2
a 2223' Y‘
427.50 .
Oct. 14, 1952
Filed Aug. 19, 1948
5 Sheets-Sheet 3
-ll'6).4'" m
Oct. 14, 1952
Filed Aug. 19, 1948
5 Sheets-Sheet 4
)"'_9 7 66 6867
Oct. 14, 1952
Filed Aug. 19, 1948
5 Sheets-Sheet 5
I 140
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7/ 46
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Patented Oct. 14, 1952
Donald F. Swanson, Ghicago, Ill.
Application August 19, 1948, Serial No. 45,176
3 Claims. (Cl. $9--283)
My invention is directed to novel improves
ments in automatic coffee brewing devices and
apparatus. More particularly my invention is
'l is a detail sectional View of a part of
the spray head delivery means and the removable
mounting means for the cover or dome and
showing the coupling-plate in elevation.
directed to a novel combination and arrange
Fig. 8 is a rear elevation of the indicator panel
ment of parts and mechanism and to a novel Ci
method of brewing and of control of conditions
t in the satisfactory brewing
of coilee.
One of the objects of my ‘invention is the prom
with attached parts and which is shown in front
elevation in the lower part of Fig. 4.
Fig. 9 is a vertical section through the indicator
plate and taken substantially on line 9-9 of
vision of an automatic coffee urn which includes 1 0
a plurality of electrical actuating‘ devices opera
tively connected to the means for causing a trans
fer of varying amounts of water as desired to the
compartment or compartments in which the
brewed according to the volume of
beverage desired to be brewed at the particular
Fig. 10 is a cross sectional view of my device
taken substantially on a vertical transverse plane
through the center of my device.
11 is an enlarged detail sectional view of
one of the water level control switches and on
a plane indicated by line l€—ll of Fig. 10.
Fig. 12 is a diagrammatic view showing the
wire circuits to the respective parts.
Referring to the drawings, reference numeral
Another object and accomplishment of my in
venticn is the provision of manually adjustable
means for presetting electrically operated mech ‘13.0 2i designates a suitable metal base such as steel,
anism for controlling the volume of hot water to
which is preferably formed with an outwardly
he forced into a brewing chamber according to
extending annular flange 22. A shell, housing,
the volume desired to be brewed.
or casing generally designated by numeral 23,
Further objects and accomplishments of my
composed of an appropriate metal such as stain
invention are the provision of adjustable manu
ally controlled coffee brewing devices which in»
elude constantly viewable means for indicating
if the electrical circuit to the heating elements
on or on’; beverage level control means; tem
perature-responsive means for automatically cut
ting oil’ the electrical power to the heating ele~
merits; means for closing the path of flow of hot
water when the hot water delivery means is
moved from a position over one tank to another
less steel, preferably of a shape or form which
will unite with the base 2 l, forms the outer wall
of the device. Said outer wall preferably engages
the annular flange 22 of the metal base 2i, and
is united to said base by an appropriate means
such as welding. The upper portion 27 of the
outer wall 23 preferably extends horizontally and
inwardly, and is preferably welded or equivalent
ly united to the upper vertical. limit of said outer
wall 23.
tank: and automatic means for keeping closed
the delivery circuit of hot water from the reser
voir to a position of delivery‘ to a beverage brew
ing chamber or tank when the water is of a tem
inner upper annular ring 33 of the outer
wall it, engages an upper annular ?ange 26, of
an annular lip 25, of an annular ring 28 of the
wall 33 of the brewing pot or tank 25! which is
perature too low for satisfactory brewing of
to be hereinafter further described. Said flange
40 26 is united to said ring 33 at the line, area, or
On the drawings:
region of engagement, by a suitable means such
Fig. l
a front elevation of my automatic
as welding.
coffee brewing device.
From the annular ring 28 of the innermost
Fig. 2
a top plan view thereof.
wall 33, an inner wall which is preferably made
S is a top plan view thereof with the top
of any suitable metal which is also of low heat
dome or cover removed.
1i is a front elevation of my device with
part of the outer metal jacket or shell and adja=
cent insulation removed and shown in section.
Fig. 5 is an enlarged view of the base and
looking at the bottom of the device.
Fig. 6 is an enlarged detail cross sectional View
of a portion of the hot water delivery means
shown in section and showing the vents in the.
top of the extractor pot.
‘conductivity, extends horizontally and outward
ly and then bends downwardly to parallel the
outer wall.
The upper inner extremity of the upper part
it of the inner wall 24 forms an annular ring
"iii. Where said ring '65 engages the annular ring
28 of the innermost wall till, the annular ring 3%
the annular ring 23 are joined by a suitable
means such as welding.
The inner shell, wall, or liner 2A is preferably
formed of two parts designated as numerals 35c
5| insulated from the meta1 of wall 30 of con
and 35b. The upper portion 35a of the inner
tainer 29 by said porcelain disks or cylinders 50.
wall 24 extends outwardly in a slight annular
Disks and wire arrangements are provided for
?ange 36a. Said ?ange 36a engages a similar
each compartment 52 and 53.
?ange 36b of the lower portion 35b of the inner (It
Immediately below the inner wall or shell 24
wall 24, preferably at the middle or center of the
and its removable plate 40 and adjacent there
vertical height of the inner wall 24. At the line,
to, is a horizontal layer or sheet or lamina 54 of
area, or region of engagement, ?ange 36a and
insulating material such as asbestos, Whose pe
?ange 36b are united by an appropriate means
ripheral limit abuts against the outer wall 23.
such as welding, to form an annular lip or ridge 10 Said layer forms the bottom of an insulating
chamber 35 around the inner wall 24, which wall
The lower portion 35b of the inner wall 24 eX
is the outer limiting wall of reservoir 38.
tends vertically downward and at its lower por
outer wall 23 forms the outer wall of insulating
tion bends inwardly and preferably horizontally
chamber 55. The insulating chamber is ?lled
to de?ne a central opening and accessible pas 15 with an appropriate insulating material or liner
sageway in which central passage, clean-out cov
for retaining heat in the reservoir 38.
er or plate 40 is adapted to be removably mount
Supporting the reservoir shell 24 are preferably
ed, for example, by screws, to permit access to
four legs or rods 56, the threaded ends of which
interior parts in assembly and during repair of
are screwed into the wall 24 and secured and
the unit. A suitable gasket 39 is mounted be 20 locked by any appropriate means such as lock
tween the peripheral ?ange of plate 40 and the
nuts indicated on Fig. 1.0 asnumber 51. Opposed
lower inner peripheral ring of the lower portion
lock nuts may be used as one means of securing
35b of the inner wall 24 to effectively seal said
legs 56 to the base 2 l.
passage. Said plate is held in place by a suitable
Obliquely extending from plate 40 through the
means such as a plurality of screws 32, which are 25 insulating liner 54 is preferably a bracket 58 for
preferably threaded through peripheral ring of
the plate 40.
supporting an instrument or control panel or
board 6| on the front face of the wall 23. Said
An innermost wall 33 made of a suitable metal
such as stainless steel, and having an outwardly
brace consists of preferably two obliquely for
wardly extending apertured rods or legs 60a and
extending annular ring 28, and a peripheral 30 602) which are composed of any appropriate ma
?ange 25 is suspended or mounted in the open
ing 37. Said flange 25 is sealed to the inner wall
24 in a manner previously described, and is
sealed to the outer wall in a, manner previously
described. The mounting of tank 30 causes an 35
terial. At their central or inner or rear ends, said
rods 60a and 60b are respectively held in posi
tion by several screws or bolts 32 and are se
cured to inner annular ring of shell 24 and plate
40 as indicated in Fig. 5.
annular reservoir 33 to be formed, which bound
At their radial orouter ends said rods 60a and
ed and limited on the outside by the inner wall
60b abut against the wall 23 from within. A pin
24 and its base plate 40, is bounded and limited
or stud 32 passes through the apertured ends of
on the inside by the tank or container 33.
each of said legs 60a and 60b of said bracket 58,
The inner tank 29 optionally is provided with 40 and through the front face of the wall 23 and
a central and vertical cross wall 42 to divide said
through the instrument or control panel Bl, sup
tank into separate compartments indicated by
porting said panel.
numerals 52 and 53, so as to permit the use of
either one or the other of said compartments.
pressed and abutted against said wall 23 ‘by
Said panel is immovably
means of a nut 53 screwed thereon, one of which
The compartments of tank 29 have mounted in 45 is screwed on the end of each of said studs 62. A
the lower ends thereof respectively the end por
gasket 64 or like protective device is spaced be
tions of outlet pipes or conduits 43 and 44
tween nut 63 and instrument board 5!.
through which ?nished coffee is drawn and
The instrument or control panel BI is pref
which pipes 43 and 44 lead to and are communi
erably made of an esthetic plastic substance. Set
catively connected to exterior accessible faucets
or mounted in said panel in any suitable esthetic
or Valve cocks 45 and 46, and which valve cocks
manner are two electrical selector switches 80,
are suitably mounted on the outer wall at the de
a “stop” button 41, a “go” button 48, and a
sired locations. The place at which said outlet
“pilot” light 49. Each one of said selector
pipes 43 and 44 through which the ?nished cof
switches controls the level of coffee in each of
fee is drawn, pass through the inner shell 24 and
the tanks 52 and 53.
the outer shell 23, are e?ectively sealed in a con
Spaced slightly behind .each valved coffee draw
ventional manner to avoid leakage, as for exam
off cock 42 and 43 and abutting .against the front
ple with the aid of opposed locknuts and gaskets
face of the wall 23 is a sight gauge assembly 65
(not shown) .
securely mounted in any appropriate fashion
An optional though desirable water outlet fau 60 around each of the outlet pipes 43 and 44. A
cet or valve cock 3| is preferably mounted on the
passageway or conduit in one of said vertically
front face of the outer wall 23 and is continuous
disposed sight gauges continuously communi
with a pipe or conduit which extends inwardly
cates with the passage in the said outlet 43 and
through openings in walls 23 and 24, being sealed
to said opening in the usual manner to form a ,
watertight seal. This faucet or valved water cock
permits the ‘selective withdrawal of hot water
from reservoir in which the end opening of con
duit 4i emerges.
Preferably mounted on the wall v3|l of the in
nermost container 29 in an appropriate manner,
in a vertical arrangement at the desired heights,
are disks 59 composed of some insulating mate
rial such as porcelain. Passing through the cen
ter of said disks or plates are electrical wire ends 75
a like passageway or conduit in the other of said
sight gauges continuously communicates with
the passageway in the outlet pipe 44. The height
.of each of said sight gauges 65, is substantially
the same as its respective brewing tanks 52 and
53"so that the level of the coffee in each of said
tanks may always be discernible.
Preferably mounted on the clean-out cover of
plate 40 in a suitable manner is a draincock 59,
the passageway of which is continuously com
municative with the reservoir 38.
As illustrated in Fig. 8 two selector switch cases
conduit I00 which communicatively connects the
66, each of which corresponds to one of said
tanks 52 and 53 respectively, are appropriately
mounted in said panel 6|. Aiding in securing
said cases 6'6 are centrally apertured U-shaped
brackets 61, the legs of which abut against the
back of said panel SI. Screws I05 are threaded
through said bracket 6'! and into the said cases
66 to retain said cases. Each selector switch
reservoir 38 with the spray head 89. Where the
pipe or conduit I00 passes through the bottom of
the wall 24, the opening provided for such pas
sage is effectively sealed from water leakage.
As illustrated in Fig. 3, the pipe I00 passes be
tween the outer wall 23 and the inner wall 24
up the back of the coffee urn, and turning in
wardly it passages the ring 23.
00 is appropriately mounted in one of said cases
In the back of each of the selector switch cases
60 an electrical socket 68 is mounted and set into
said case and is retained in any suitable manner.
As illustrated in Fig. 5, also securely positioned
beneath the bottom of the wall 24 is a pressure
relief valve IOI. Said valve is interposed in
conduit or pipe I02 which communicatively con~
nects the reservoir 38 with a, drain-off pipe I01
Said socket 68 is supplied with electrical wire
end contacts which communicate with the selec 15 outside the urn. A pipe or conduit I03 com
municatively connects the conduit I02 with a
tor switch 00. A plug (not shown) adapted to
pressure switch I04 in a manner so that the pres
be received in socket 00 electrically connects
sure applied against said pressure switch will
said selector switch with properly insulated elec
control the ?ow of water through valve 01 as
trical wires 10, the ends of which wires are the
terminal wire ends 5| heretofore described. Said 20 hereinafter described. It is to be understood.
however, that any equivalent mechanical prcs~
plug when in socket 00, is additionally supported
sure relief means may be employed.
by the bracket 61, the central aperture of which
For the brewing of coifee I employ a leecher
bracket permits said plug to be plugged into
bucket hood and sprayhead of the class described
said socket.
in my co-pending application, Serial No. 676,681
Mounted behind the instrument panel, be
now issued as Patent No. 2,539,708. Said brew»
tween said panel and the outer shell 23 is a
ing apparatus receives its hot water supply from
microswitch ‘II and relay ‘I2. Said switch TI and
the reservoir 38, said water being delivered
said relay T2 are magnetically connected to each
through the conduit I00.
other in the usual manner, with said micro
Referring to Figs. 1, 2, 3, 4 and 10, numeral 0!
switch being activated by pushing the “go” button »
designates a dome-like metal cover having a
46. Electrical wires ‘I3 from the “go” putton I10,
suitable handle 82, said cover being pivotally
relay ‘l2, pilot light 49 and “stop” button 4‘! are
mounted to the top wall of the urn unit by means
bundled or wrapped together in a properly in
of a projecting metal arm or lever 83 which is
sulated coat, and preferably terminate in an
eight point plug '18, said plug being adapted to * pivoted to a suitable apertured bracket 84 sub
The periphery of said
‘ stantially as illustrated.
?t into a female socket 10 which is mounted in
cover is adapted to seat, when the same is closed,
the control box ‘I4 and to be hereafter described.
on the annular lip 25, as shown in cross section
A suitable bracket 11 which is retained by ap
in Fig. 10 at the upper edge of the coffee tanks
propriate screws 19, as illustrated in Fig. 8, re
tains the wire bundle ‘I3 from undesirable move ~10 52 and 53.
As illustrated in Figs. 3 and 4, a preferably
removable fabric 05 is adapted to be alternately
As illustrated in Figs. 5 and 10, numerals SI
and horizontally swung over each of the tanks
and 92 represent electrically controlled thermo
52 and '53 as coffee is desired or required in each
stats which are suitably mounted on the bottom
of the wall 24 in any appropriate manner to 45 of said tanks.
Said fabric 85 ?ts entirely within the dome
preclude leakage from the reservoir 35. Com
BI and is adapted to hold ground coffee. Said
municatively connected with each of said ther
mostats and passing through the lower wall and
into the reservoir 38 is a thermostat well I06.
fabric 85, preferably in the form of a bag, is
adapted to be removably suspended or mounted
over the annular edge of an apertured cap or
cover or hood 86 and to be held in such position,
wall 24 is a, control box ‘M which is releasably
as long as is desired, by a releasable locking
retained by means of a bracket as. The bracket
clamp 81 which is adapted to hold the edge por
03 is immovably retained by means, such as
tion of the bag immediately above the edge por
screws threaded into the bottom of a heater ter
minal box 94. The heater terminal box 90 in 55 tion of hood =86. The hood 80 preferably has
three spaced apart holes or apertures 08 through
turn is appropriately and securely retained on
Slidably but rigidly mounted beneath the inner
the plate 40. Bundles of insulated wires 05
communicatively connect the thermostats 9i
and 92 and the heater terminal box 90. Heater
elements 06 communicatively connected with
said heater terminal box 50 are positioned in
the reservoir 30.
which atmospheric air may be appropriately
drawn, in the event a back pressure from the
tanks 52 and 53 develops. The provision of
these three apertures will preclude a backflow
of coffee from the tanks 52 and 53. A suitable
handle 90 is appropriately positioned on the
hood 86.
As illustrated in Fig. 6, a passaged mounting
As illustrated in Fig. 5, a cold water solenoid
and its actuated valve 9"! are interposed in any
conventional manner in the cold water line 98 05 block I59 is secured on hood 86 in any appro
priate manner. The passage of the block IE9
which brings cold water from the water supply
is threaded and adapted to have one threaded
source to the reservoir 38. Where the cold water
end of a curved delivery pipe or spray head 03
line 08 passes through the bottom of the inner
threaded in the passage of said block. The
wall 24 into the reservoir 38, said passage is
effectively sealed in an appropriate manner to 70 mounting block 159 on one transversely extend
ing ?ange thereof has a pair of integral extend
avoid leakage of water.
ing lugs or extensions IBI, as shown in Fig. '7,
A brewing solenoid and its actuated valve 09
which are releasably engaged by projecting teeth
are positioned below the bottom of thewall 24
or lugs of a passaged ?tting I60. Said ?tting
as illustrated in Fig. 5. Said valve 99 is inter
posed in any suitable manner in a pipe line or 75 I60 has a central recess I63 in which is mounted
a suitable yieidable sealing ‘washer I64. Fitting
IE9 is securely mounted upon the end'portion of
a connecting pipe I66. The lower edge portion
of the ?tting IE0 is adapted to be yieldably and
releasably held in the position‘ shown in Fig. 6
greatly lessened, the packing of the coffee
grounds against the fabric 85 no longer occurs to
any objectionable extent and thereby permits
the extracting liquid through the pervious fabric,
and the objectionable pressures which often
were sufficient to rupture the pervious material
by a spring or clip I65 which is secured by a
screw or the like to the lower portion of the
no longer exist.
mounting plate I59. Said pipe I66 may have
interposed therein suitable manually controlled
safety valve means (not shown). .The end of 110
the connecting pipe I66 ‘is vsecurely mounted in an
aperture in the upper portion of’ a swivelly
mounted ?tting or post I68 whose lower reduced
bushing I 09, said bushing I 99 being threaded 15
in bracket I08 as illustrated in Fig. 6.
The passage of said connecting pipe I66 and
the passage in said swivelly mounted ‘?tting I69
communicates with the passage of the hot water
delivery pipe I99. ,It will be understood that 20
89 (as well as the hood 86) to be'selectively piv
oted in a horizontal direction so as to selec
tively cause delivery of hot water to either of the
brewing tanks hereinbefore described.
Referring again to Figs. 3 and 6 and speci?
cally to the holes, apertures or vents 88, said
vents are optionally though preferably equally
In Fig. 12 I have shown the electrical circuits
end is rotatably mounted and journaled in a
the said ?tting I68 permits the delivery pipe
As a further consequence a
more complete extraction of the coffee grounds
(A) Main power circuit
Referring to the upper right in Fig. 12, cir
cuit wire 110 leads from a source of electric
power, preferably 220 volt, and leads to a ter
minal designated as “,1” on a four pointed plug
III which is mounted beneath inner wall 24
of the device. Said plug III is composed of two
sections and is separable, the other cooperating
male section thereof being designated as IIIa.
Numeral II2 designates a circuit wire which
connects the other connection of a power source
to terminal marked “4” on plug III. The man
ner in which the device is electrically activated
is by depressing the “Go” button 58, which pro
duces an electrical connection between wires H3
spaced from each other. Each of said vents 88
preferably has a screen I15 mounted therein, 30 and H4. Wire II3 connects one side of said
“Go” switch with a terminal marked “1” of male
for example by soldering the edge portion there
plug 78. Wire H4 is electrically connected to
of. As was explained before, one function of
the terminal marked “/l” in the plug ‘I8.
these vents is to permit ‘atmospheric'air to be
As shown in Fig. 12, the female plug "it inter
drawn through the hood 86. But also the vents
?ts with male plug 18 and has corresponding
88 function in other capacities.‘
spaced terminals “1” to "8” inclusive. When
It is to be understood that the hood 86 and
male plug ‘I8 is ?tted into plug ‘16 and the “Go”
the bag or fabric 85 normally mounted thereon
switch is closed the terminals “1” and “4” of plug
form an extractor pot or container. I have
'56 will transmit the electricity through the wires
found that one of the major previously unsolved
problems, in coffee brewing devices which have 40 'I i3 and I I4.
l6 circuit wire
hot water delivered to the ground coffee con
H5 is connected to transformer ,II6 which is
tainer and those which are not of the percolator
mounted inside the control box "I4 (in Figs. 5
type, was to keep the coffee grounds in liquid sus
and 10) .
pension at all times during the extraction of
Circuit wire II'I connects theopposite terminal
the ?avor therefrom, to thereby give a more uni
of said transformer II6 to terminal marked “1”
form extraction of the coffee ?avor and reduce
in plug IIIa. From terminal “1”‘ of socket ‘I6
the time required to extract the ?avor.
circuit wire II 3 leads to terminal marked “4”
I have also found that a heretofore insur
of male plug II Ia. This has described the cir
mountable problem existed due to the entrap
cuit wire connection to terminals “1” and “4” of
ment of air between the top hood 86 and the top
plug I II (when male plug II Ia has been posi
of the level of the incoming water in the ex
tioned into cooperating plug III). This has
tractor pot or unit, to thereby cause a caking of
completed the circuit from the “Go” button 48
the coffee grounds in the ‘bottom of the ex
to the power source.
tractor pot and the plugging up of the per
vious portion thereof. The described phenom
B.--Description of circuit of heater means, cold
enon would ‘cause pressure to be developed in 55
water supply control means and pressure
the extractor pot which was responsible for the
rupturing of the pervious membrane. '
By venting the hood 86 the herein described
‘ objections and unsolved problems become nega
tive and solvable.
Referring to Fig. 12, thermostat 92 is a heater
control thermostat which is preferably normally
60 closed.
Terminals “l” and “2” of said thermo
What occurs-when the vents or holes 83 are
stat 92 activate the heater element 96 between
against the fabric 85, to thereby prevent the hot
extracting liquid from passing through said
fabric, but-will become suspended in the extract
of thermostat 9| are normally closed or con
nected, said terminals serving as a safety or
limiting means. The terminals “1” and “2” of
terminals “1” and “2” of said heater element.
used is a complete reversal of the phenomenon
Terminals “3” and “4” of the thermostat 92 per
above described. When the hot Water comes
into the extractor pot bubbles of air will rise 65 form the same function for the heater element
96 between terminals “3” and “4” of said heater
through the vents 88; the ground coffee in the
element. It is to be understood that the heater
fabric 85 will go into suspension in the hot wa
is preferably a dual type immersion heater.
ter. Some of the grounds will tend to plug up
Thermostat 9| functions both as a limit ther
the screen I75, not su?iciently, however, to cause
mostat and as a circulation thermostat as will
complete entrapment of air in the extractor pot. 70 be presently described. Terminals “l” and “2”
The coffee grounds will no longer be caked
thermostat 9I being closed, break the circuit to
ing liquid. As a consequence extraction time is 75 vthe heater elements
96 in the event that ther
9 .
mostat 92 does not operate or fails to perform
to break the circuit when the water in the reser
voir reaches the required temperature.
The circuit employed and illustrated in Fig.
12 is as follows:
Wire II8 electrically connects terminal “2”
and said resistor is adapted to reduce the 40 volts
to one-half volt. The wire I33 is connected to
one terminal of the resistor i352 and to terminal
“2” of male plug IIIa.
Normally plug Elia is connected and inter?t
ting with plug i I I so that the corresponding ter
minals are united. Likewise normally plug ‘I8 is
of thermostat 92 with terminal “2” of the heater
element 96, said wire H8 being electrically con
united to plug or socket ‘it so that the corre
nected through the heater element 96 between
sponding terminals are united.
Terminal “2” of plug Iii has wire 231i having
terminals “2” and “1” thereof to wire I I9, which 10
two branches connecting same to the central
wire IIP. terminates at terminal “1” of the heater
terminals of manually operated selector switches
96, the other end thereof being connected to
terminal “1” of the thermostat 9I. Terminals
38. Said selector switches each have a plurality
“l” and “2” of both the thermostats 9| and 92
of spaced terminal elements title which are re
are normally electrically connected to each other,
spectively connected by a plurality of wires ill to
said terminals being normally closed.
the end terminal elements 5i which have been
A wire I25 preferably at one end thereof is
previously described as being mounted in the
connected electrically to terminal “1” of the
brewing tanks.
thermostat 52. Said wire I20 at the other'end
The selector switches 8i] each have a manually
thereof terminates at one of the terminals of 20 rotatable handle £36, as illustrated in Figs. 1 and
the cold water inlet valve solenoid 91. The wire
Li, each of which handles are connected to a
i253 is electrically connected through the sole
metal contact arm which is normally rotatable in
noid 9'! to wire I2I which in turn is connected
the switch so as to contact any one of the ter
to pressure switch I04. The wire I2I is electri
minal elements Btu of such switch. 'The face of
cally connected through the normally closed
each of said selector switches preferably has
pressure switch I04 to wire I22 which is in turn
spaced markings as illustrated in Fig. 4, and
connected to terminal “2” of the thermostat EH.
these respective markings have relative positions
To energize the cold water supply circuit a wire
according to the volume (and depth) of water in
i255 shunts electricity from power wire II2; said
the brewing tank to which they are operatively
wire I23 is electrically connected to wire I20 and 30 connected.
to terminal “4” and “l” of thermostat 92. A
Accordingly when a user desires a predeter
wire I24 electrically connects power wire Ht
mined volume of water in the tank (which is
with terminal “2” of the thermostat 9I on the
known will have a level corresponding to the‘
other side of the circuit.
positioning of one of the vertically spaced end
‘Terminals “1” and “i” of heater 96 are elec
contact elements 5i), he will move the handle
trically connected. A wire I16 connects terminal
I36 and its connecting arm to agiven' selected
“3” of thermostat 92 with terminal “3” of said
position which will thereby electrically connect
heater 9%.
the central terminal of said selector switch 8t
to the selected terminal 36a, to thereby also elec
C.—Desc'ripiion of brewing circuit
trically connect the wire I31; to such selected end
terminal element 5i.
To operate the brewing solenoid so that only
When the water rises to reach such selected
water of the proper temperature will be permit
end terminal element 5! (which has been electri
ted to be withdrawn from the reservoir 38 to be
cally energized by selection as aforesaid) it will
used in brewing coffee, a wire I25 connects ter
become grounded through the Water body and
minal “4” of thermostat 9| with one terminal
cause electrical connection to be established be
of the solenoid 99. The wire I25 is elecctrically
tween the wire I3‘l, as indicated at I38 (see left
connected through the solenoid to wire I26, said
of Fig. 12). The wire it‘! is electrically con
wire lit being also connected to terminal “2”
nected to the 110 volt terminal iii! of the trans
of thermostat 9! where the brewing circuit is
energized on one side by connection with wire 50 former H6. The wire Itlis also connected to
terminal “8” of electronic tube Isl. This com‘
I22 at said terminal “2.” Terminals “3” and
pletes an illustrative 1/2 volt circuit.
“4” of thermostat GI are normally disconnected,
but when the temperature is su?iciently high the
terminals “3” and “4” close establishing an elec
trical connection thereby. To complete the
brewing circuit, a wire I21 connects terminal
“3” of the thermostat 9| with terminal “3” of
the plug III. When said plug III is ?tted onto
plug IIIa, terminals “3” of both plug III and
Ilia become connected. A wire I28 connects
terminal “3” of plug I I la with wire I I5, said wire
H5 being connected to the power source as here
tofore described.
Description of the 1/2 volt circuit
Description of 40 volt circuit
The function of this circuit is to automatically
energize the relay M6, whose actuation is adapted
to energize the relay l2 behind the micro switch
‘II to thereby reset said microswitch to inoper
ative position, to thereby cause an opening of the
main 220 volt power circuit heretofore described.
It is to be understood that opening of the afore
said main 220 volt circuit does not affect the
circuits to the heaters and solenoid and actuated
valve 9i heretofore described.
However, such
65 opening of said 220 volt circuit at switch l’ I
does affect the circuit which controls solenoid ‘35B
The transformer I'I6 has one coil thereof
of the hot water supply valve.
' r
adapted to reduce the power ‘to 40 volts as desig
One terminal of relay it!) is connected by a
nated at I29 in Fig. 12. One circuit wire I3il
circuit wire HI to one of the terminals of the 40
connects one terminal of said transformer coil
I29 to terminal “1” of electronic tube I3I shown 70 volt transformer portion i292. A wire iii-2 shunts
electricity from the wire MI to a condenser Hi3‘
diagrammatically in Fig. 12; and which is nor
(shown at left of Fig. 12) through which con
mally mounted in the control box ‘I4. Said elec
denser said Wire M2 is electrically connected to a
tronic tube I3I has eight spaced apart terminals
numbered “1” to “8” inclusive. Wire I30 is'con
nected with the resistor element I32 in tube I3I
wire Iii. Condenser Hi3 is preferably positioned
in the control box ‘it. vWire Mt is connected to
1 1v
terminals 3 and 1i of electronic tube I3I. A
wire I45 connects terminal “4” of tube I3I to the
opposite end of the coil of the relay Mt, as illus
trated in Fig. 12.
When the wire end terminals 5i are not
grounded to establish a circuit with the wire I31
the relay I49, being energized as above described,
will hold its switch in open position. On ground
ing of the wire ends 5I to establish a circuit with
Brief description of operation of the device
The thermostat 92 and terminals “1” and “2” of
thermostat 9|, the heater 96, the solenoid 91 and
pressure switch I04 have circuits which are inde
pendent of the transformer II6. These operate
directly oil‘ the main power lines I I0 and H2.
By connecting- the device with a main power
source thev above recited structures operate as
the wire I31 as above described, the electrical 10
The heater thermostat 9'2 and the limit thermo
?eld in the electronic tube I3I will be reversed
stat (terminals “1” and “2” of thermostat. 9I)
with a consequent reversal of ?ow of electricity
will cause the water in the reservoir 33 to be
to the relay‘ I40. As will be described, the re
heated to the desired temperature and will cause
versal of energization of the relay I49 will cause
a; closing of the switch arm of relay I40, and 15 the heating circuit to be broken when the water
the consequent re-setting of the micro-switch‘ 'I'I
to'break the circuit to the main power line, there
by causing stoppage of the flow of hot water from
the‘ reservoir 38 to delivery position with respect
to tanks 52 and 53.
Description‘ of 24 volt circuit
This circuit hasas its function the setting into
operation of the automatic control means for
selectively delivering hot water through the pipe
is above the desired temperaure.
upon the pressure created in the reservoir 38 is
the normally closed pressure switch I54. When
the pressure-within the reservoir I04 is below a
preferred amount a circuit will be closed to there
by energize the solenoid andits actuated valve. 97
to permit the flow of water into the reservoir. It
should be understood however, that any manual
adjustable equivalent means may be employed as
a pressure regulator.
The operation of the re
mainder of the structures is dependent upon the
energization of the transformer I-I6. By opera
tion of the "Go," button 48 the wires I I3 and H4
delivery means to positions to drop into either of
the‘ tanks 52' and 53.
Upon depression of the “Go” button I28, as
are electrically connected so asto establish a cir
has'been hereinbefore' described, the 220 volt cir
cuit and thereby cause current-from the main
cuit which energizes the transformer I I5 becomes 30 power‘source,.via‘ wires: III] and H2, to energize
activated. The transformer IIS' has a 24 volt
the transformer IIB. When the transformer H6
coil‘ I46 and terminal connections therefor. A
is energized a circuit is completed which-will per-v
wire I4‘! connects one of the terminals ofcoil MB
mit the operation of the solenoid and its actu->
to terminals “2” and “3” of socket l5.
ated valve 99-. The solenoid and‘ actuated valve
shunting electricity from the wire" I4‘! is a re
sistance wire I48 which is connected to terminal
"'7”'of'the'electronic tube I3 I. From‘ the opposite
terminal of the coil I46, a“ wirev I49 carries elec
tricity to terminals "5” and “6” of socket ‘I5.
shunting‘ electricity from wire‘ I49‘ to electronic
tube I3I is a wire I50. Terminals “2” and “'7”
are electrically‘ connected within the electronic
tube I3'I. as illustrated.
Carrying‘ electricity from the wire I49 to .a
switch arm of‘relay I40 is a‘ wire I5I.
In normal operation, the switch arm is in cir
99 are the hot water solenoid and brewing valve.
The manner in which these operate is to per
mit hot water to normally flow from reservoir
38 into the selected brewing tank 52 or 53. Upon
the breakingof. theicircuit to the transformer in
any manner, the solenoid operating the valve 99
will become de-energize'd and cause said valve to
close, to thereby stop thev flow of water from the
reservoir 38 to the tanks 52 and 53. The end
terminals 5'I receive their energy from the 40 volt
coil I29 of the» transformer II5. Consequently
any means whichcauses an interruption in the
cuit closing position by the energized 40 volt cir
current through said transformer will render
cuit previously described. A wire I52 is connected
these end terminals inoperative.
from the coil of relay I49 to terminals “7” and “8”
When electrical energy is ?owing through
of‘ this. socket ‘I6.
transformer H6, and consequently through the
From the stop button switch 47 a wire I53’
selector switches 80, current from the trans
connects same to terminal “8” of plug "I8 (and 16).
former. IIG'Will ?ow tolone of. the terminal ends
Another wire I54 connects the other terminal of
5I which is selected by- the selector switch 80.
said stop button switch to terminal “6” of plug
The hot water solenoid and its actuated valve
18 (and 16). The terminals “6” and "8” of the
being normally open when energized, hot water
plug 18 will be electrically connected when the
will ?ow from reservoir 38‘ through the pipe I09,
stop button is depressed.
through the. spray head and into the desired tank
From one of the terminals of the pilot light
up to‘ the level of the selected end terminal 5|.
49a wire I55‘ electrically connects said terminal 60 When the liquid-comes in contact with the ener
to terminal “2” of plug ‘I8 (and '16). Another
gized end terminal 5|, a circuit is established
wire I56 connects the opposite terminal of said
between the transformer coil, the electronic tube
pilot light 49 to terminal "5” of plug ‘I8.
and the relay I40 to cause a closing of said relay
A wire I5‘! connects one terminal of the coil of
and a consequent closing of the relay ‘I2 to there
relay 12 to terminal “7” of plug ‘I8. Another 65 by reset the micro switch ‘II. Resetting of the
wire I58 connects the other terminal of the coil
micro switch 'II electrically disconnects the wires
of said relay to terminal “3” of plug ‘I8.
H3 and H4, causing the. circuit to the trans
Pushing the “Stop” button 41 causes an elec
former IIG to be broken, with a consequent de
trical connection between the wires I53 and I54.
energization of the. transformer II6. Said de
Said connection causes the relay 12 to close, to 70 energization of transformer Il6~causesbrewing
thereby reset microswitch ‘H. The resetting of
valve solenoid 99 to become de-energized and the
dependent valve will close.
microswitch ‘II causes the main power circuit
to the transformer II6 to be broken, to thereby
Another method or manner in which the: hot
stop energy from ?owing to all the dependent
water solenoid andits actuated valve 99 may bev
structures. herelnbefore described.
76 closed, to stopv the-?ow of water» from the reser
voir 38 through the pipe I 09, to the tank 29, is by
connecting the wires I53 and i515. This may be
done ,by pushing the “Stop” button to, thereby
cause'relayl? to be energized. The energiza
cuit wires connecting said electronic tube to said
selector switches, circuitrwires connecting a sec
ond of'said transformer = coils to said terminals
tion of. the relay 72 will cause a resetting of the
andsaid electronic tube; a relay electrically con
nected to said electronic tube;-. the contact of
micro.'switch and a consequent de-energization
rising liquid entering the brewing tank with said
of the’transiormer H6.
terminal ends causing completion of a circuit in
" ,~
' .As it is'now understood, by pushing the “Go”
saidsecond mentioned transformer coil; the elec
button’?B each of the selector switches'til be
comes energized. A selector switch t?‘is pro
vided for each of the tanks represented here by
the numerals 52 and 53. (It is to be understood
trical ?eld in'said electronic tube closing said
relay, and. circuit means connected to said relay
when: energized and adapted to open said start
ing switch and circuit wires connecting a- third
that there may be more or less than two tanlrs.)
transformer coilandzsaidgstopr switch, said stop
Each of the selector switches is provided with
switch when closed establishing a circuit in said
a manually operated dialhandle 136 so that the
contact in the switch 81] may be turned to en
gage any of the terminals 88 to thereby activate
the contacted terminal. This will cause theter
third transformer coil and said relay to thereby
close said relay and open the start switch.
2. In an automatic beverage brewing device, a
hot water reservoir; a plurality of brewing tanks;
a housing enclosing said tanks and said reservoir;
minal end 80a selected to be energized because
of the continuous-connected electrical path es 20 a plurality of vertically spaced end terminals in
said brewing tanks; selector switches connected
tablished as described. Because the solenoid ac
to said end terminals for selectively electrically
tivated valve so is normally open when its cir
cuit is connected to a power supply source hot
water ‘from the reservoir 38 will normally tend
to flow from the reservoir 33 to the selected tank.
connecting vcertain of said terminals with said
switches; a hot water delivery pipe connected to
" said reservoir and adapted to selectively discharge
into said brewing tanks; a solenoid operated valve
in said hot water delivery pipe; a starting switch
mounted on said beverage brewing device; a
stopping switch mounted on said beverage brew
a circuit will be established as described to cause
a resetting of the micro switch and a consequent 30 ing device; a transformer electrically connectable
to said switches and being energizable by a power
stopping of the rise of the level of the liquid in
upon operation of said starting switch;
the selected tank (52 or 53).
said transformer being connected to said hot
The present invention has been described here
water delivery pipe solenoid and permitting open
in more or less as to details, yet it is to be under
thereof only when said transformer is ener
stood that the invention is not limited thereby,
gized; thermostats mounted in said reservoir;
as changes may be made in the arrangement and
circuit wires connecting said hot water pipe sole
proportion of parts, and equivalents may be sub“
noid and said thermostats and permitting selec
stituted without departing from the spirit and
tive delivery of water to said brewing tanks when
scope of the invention.
Upon the rise of the liquid to the point of the
end terminal El which is electrically connected
to the terminal Sta, which has been selected,
I claim:
1. In an automatic beverage brewing device,
a hot water reservoir; a plurality of brewing
tanks; :1. housing enclosing said tanks and said
reservoir; a plurality of vertically spaced end
terminals in said brewing tanks; a plurality of
selector switches electrically connected to said
end terminals respectively; a hot water delivery
40 water in said reservoir is above a certain tem
perature; an electrical mechanism connected to
certain of the coils of said transformer, the con
tact of rising liquid with the selected terminal end
in said brewing tanks completing a circuit with
said electrical mechanism; a relay electrically
connected to said electrical mechanism, circuit
mechanism between said relay and said starting
pipe connecting said reservoir and adapted to
discharge into said brewing tanks; a water supply
switch, the closing of said relay causing opening
of said starting switch thereby cutting oif the
necting said hot water pipe solenoid and said
‘thermostats and permitting selective delivery of
water to said brewing tanks only when the tem
solenoid valve in said pipe means, said valve be=
ing connected in electrical circuit with said ther
for controlling the delivery of water from said
reservoir to said brewing tanks only when the
water is above a predetermined degree; an elec
tronic tube electrically connected to one of said
switch means in electrical circuit with said valve,
said manual switch means when closed being
adapted to energize said valve to open the same to
permit hot water to flow from the reservoir to the
pipe connecting said reservoir and a water supply 50 power to said transformer; said stop switch when
closed completing a circuit within one of said
source; a solenoid operated valve in said water
transformer coils; said last mentioned coil being
supply pipe; a solenoid operated valve in said
connected to said relay and when energized caus
hot water delivery pipe; a manually operated
ing opening of said starting switch, the closing of
starting switch mounted on said beverage brew
ing device; a manually operated stopping switch 55 said starting switch actuating said electrical
mechanism to open said relay.
mounted on said beverage brewing device; a trans
former electrically connectable to said switches
3. Inreservoir,
an automatic
means coffee
to a supply
device, of
and being energized by a power supply source
when said starting switch is closed and being
deenergized when said stop switch is closed, said 60 taining a predetermined volume of water in said
reservoir, means for heating the water within said
transformer being connected to said hot water
reservoir, at least one brewing tank, pipe means
pipe solenoid; said transformer having a plural
connected to said reservoir and adapted to con
ity of coils of varying voltage; thermostats
duct hot water from the reservoir into said brew
mounted in said reservoir; circuit wires con
ing tank, a-normally closed electrically operated
mostat and being adapted to be opened only when
perature of the water is above a predetermined
the water in the reservoir has attained a prede
degree; circuit wires connecting said transformer
and said solenoid of said hot water delivery pipe 70 termined temperature, normally open manual
voltage transformer coils when energized, cir 75 brewing tank, a plurality of vertically spaced bare
electrode means disposed, within, said brewing
tank, amultiFcontact-manually operable selector
switch having a plurality of contacts eachiinelec
tric‘a‘l‘ connection with one‘ electrode means,,said
selector switch being inelectrical eircuitwith re
lay means operatively connected tolsaidlmanual
switch means, saidelectrode means being adapted
to be exposed to the liquid. within said: brewing
tank so that when" the liquid: contacts, an elec
trode means preselecte'clby said‘, selector switch 10' 2,013,694
the said liquid completes, acircuit throughv said
relay to energize theisam'e and to open ‘said man
ual switch; thereby ‘ to: close; said: second valve and
arrest the flow ofiwatento said brewing tank.
The- following references are; of record: in the
?le’ of this patent:
Ingraham‘ ___v_, ____ _.Mar. 30, 1858,
Kingsbury/d ________ ‘July: 20,1920.
Beach __>__,_____1-__. Jan, 29,1924
Long _____________ __ Nov: 23,1926
Aborn __________ ___June 10, 1930
Heroy ___________ __ June‘ 16,1931
Brand ___________ __ Sept. 8,
Wignall ________ ____ Nov. 17,
Medin ___________ __ Dec; 22-,’
Strandet a1 _______ __ Aug. 2",
Thomas __________ __ Aug.27',1935
Melzer'e't a1 _______ _. Sept. 10, 1935,
Ewertz ___________ __ May'28, 1940
Oyen _____________ .._. July 2,1940
McKinni-s _________ _. May-11, 1943
McCaul'eyetlahnh- Jan. 25,1944
Bright ____ ______ -1-‘ Oct; 10, 1944
Porteous-i ____ __, ____ _.Mar'. 27,1945
Kant'or et a1 _____ 1-“. Jan. 4-, 1949
Swanson _________ __ Got-18,1949.
Hot'vedt ___-_,____ __ Mar. 13,1951
Swanson __________ _~ Jan. 10,1950
Switzerland _____ __ May 18,1937
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