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Патент USA US2132706

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0d. »11, 1938.
2,132,706
F. S. SMITH
ELECTRICAL TREATING APPARATÚS. ESPECIALLY FOR ~STERILIZATION
Original Filed Aug. 2, 1932
_ NWWNNN
`4 Sheets-Sheet 1
Oct. 1.1‘, 1938.
F. s. SMITH
E
2,132,705 .
ELECTRICAL TREATING APPARATUS, ESPECIALLY FOR STERILIZATION
Original Filed Aug. 2, 19252-
--1. _ _ _ _ _ _ _ _ _
_
_
_
_ _
L{Sheets-Sheet 2
_ __'_
i 94
lIl
‘ ocr. 11, 193s..
d2,132,701;
l F. s. sMm-l
ELECTRICAL ITREATING APPARATUS, ES1°EGIALLY FOR STERILIZATION
4 She'ets-Sheet 5
original Filed Aug. 2, 1§52
¿il--IL/iI1|î-l
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INVENTOR
fÃ'w/v/Q//v 5. fri/Uff
M, Meß ßaßm
~ ATTORNEYS
Oct. l1, 1938.
F. s, sMrn-l
-
2,1.32‘Q7U6
ELECTRICAL TREATING APPARATUSVESPECIALLY FOR STERILIZATION
Origìpal Filed Aug.4 2, 1932
4 Sheets-Shed’.` 4
ATTORNEYS
2,132,706
Patented oa. 11, 193s
UNITED STATES
PATENT ` oF‘EicE ' .
. 2.132.106
ELECTRICAL TBEATING APPARATUS, ESPE- _
CI_ALLY FÜR STERILIZATION
`
i
New Haven, Conn.
Franklin s. smith,
_
z, 1932, serial No.
>Original application August
' 627,291. Divided and this application October
s, 1934, serial No. '147,440
- 24 claims.
(ci. er1-_192)
This invention relates _to apparatus which is
especially adapted for the electrical sterilization
of products, particularly for the destruction of in
sect life in food and other products and this
5 application is a division of my application, Serial
No. 627,291, ñled August 2, 1932, now patent No.
1,975,805,1ssued'0ct. 9, 1934.
,
One of the objects of this invention is to pro
vide a thoroughly practical and dependable elec.10 trode construction and driving means therefor,
adapted to be subjected vto highl voltage and t'o
produce a corona-like discharge in the treatment
zone through which the products to be sterilized
are passed. Another object is to provide a con
struction of the above-mentioned character that
is well adapted to meet the various and varying
conditions met with in practical use. Another
object is to provide a simple and practical mount
ing for such an electrode structure as wellas to
20 provide a dependable and reliablecircuit or cir
cuit connections therefor. Other objects will be
in part obvious or in part pointed out hereinafter.
The invention accordingly consists in the fea
tures of construction, combinations of elements,
25 arrangements of parts as will be exemplified in
the structure to be hereinafter described and the
scope of the application of which will be indicated
in the following claims.
.
l
"
In Vthe accompanying drawings, in which is
30 „shown one of the various» possible embodiments
of my invention,
'
Figure 1 is a fragmentary front elevation of
the complete sterilizing apparatus, certain parts
being, however, shown diagrammatically and
35 other parts being shown in central vertical sec
tion;
»
a portion of the electrode supporting structure
therefrom:
-
`
' Figure 8 is a detached fragmentary plan view
of the rotor and stator construction embodied in
the electrode structure of Figure 2, and
‘
Figure 9 is a detached fragmentary front ele
vation of the rotor of Figure 8. -
Similar reference characters refer to similar
parts throughout the several views. in the draw
'ings.
'
,
'
Referring first to Figure 1, in which I have
shown a side elevation of the complete apparatus
of my above-mentioned parent application, omit
ting, however, certain parts and showing- certain
other parts diagrammatically and'to which par
15
ent application reference may be made for a
detailed 'description of the diagrammatlcally
indicated and omitted parts, I have indicated at
=I0 the frame of the machine provided at its ends
with upstanding pairs of stands 24-25 respec
tively supporting a driving drum 2l and an idler
or supporting drum 29 about which extends. a
conveyor belt 28 made of any suitable non-con
ductive materialand provided with a belt-sup
porting structure which may comprise insulating
side beams 64-65 (see also; Figure 3) supporting
a ñat elongated rectangular sheet of insulating
material 62, preferably made of “dilecto” or lam
inated “bakelite" which is in intimate contact
with the lower surface of the upper side of con 30
veyor belt 28 and indirect supporting relation
thereto; this sheet of insulating material 62 may,
as disclosed in my parent application, be inter
rupted throughout the two treatment zones in
order to receive, also in belt-supporting relation, 35
plates of .“pyrex” glass or `fused quartz, one for
each treatment zone, and in Figures 1 and 3 two
such plates 61 and 68 are shown.
Figure 2 is a vertical central sectional view,
on an enlarged scale, showing one of the electrode - . Accordingly, the conveyor be1t28, when driven
structures and driving motor and mounting to move the upper side thereof from the right
`
toward the left, las viewed in Figure 1, may sup
40 therefor; ‘
Figure 3 is a plan view, on an enlarged scale, port and move the goods to be sterilized, illustra
substantially asI seen along the line 3-3 of Fig
tively packaged goods, such as packaged cereals, l
ure 1;
pour, or the like, indicated at C in Figure 3, for ‘
Figure 4 is a detached fragmentary vertical electrical action thereon, the details of which ac
sectional view through »a portion of the electrode
structure, showing also one> electrode member in
front elevation;
tion> are described and analyzed in my above
mentioned parent application.
_
As the packages of product to be treated are
Figure 5 is a horizontal sectional view on an moved along the conveyor from the receiving'end
enlarged scale as seen along the line 5-5 of Flg- ` to the discharge end of the apparatus, they pass 60
ure 4;
,
beneath the electrodes 9! and 92 and through
Figure 6 is a horizontal sectional4 view on an treatment zones associated therewith, as will ap
enlarged scale as seen along theline 6-6 of
pear more fully hereinafter.
,
‘ Figure 4;
The electrodes, illustratlvely two, 9| and 92 are
Figure '7 is an isometric view of a piece of in- - Vpreferably supported in a common plane substan
55 sulating tubing showing the manner ofproducing
55
.
2
2,182,706
tially parallel to the upper conveying surface of
The various hole portions I0 le arranged in two
the belt 29m substantial alinement above the
center line of the belt. Electrodes 9| and 92 are
concentric rings about the concentric ‘ring por
maintained in spaced relation above conveyor
beit 28 by metallic brackets 93 and 94, respec
portion of the housing, are preferably inclined .
at a common angle of 50° or 60° with respect to a 6
tively, which in turn are suitably supported in a
manner more fully described hereinafter.
Each electrode 9| and 92 is preferably provided
with upstanding stem -portions 95v and 96, respec
10 tively, which are received within suitable. hole
tions |0|¢ and |0|d, respectively,` of the lower
plane normal to the axis of the electrode; the
center lines -of the holes and consequently the
center lines of the various electrode members
individually associated with the holes lie in planes
substantially tangent to either of the two con 10
centric ring portions of the lower electrode hous
ing. Thus, the extreme tip portions |02d of the
portions 99a and 94a, respectively, provided in
brackets 93 and 90 and permanent fastening
therein is preferably effected by wedge-shaped i various electrode members lie along two concen
pins 91 and 90 passing through suitable holes tric circles and preferably in a common plane.
15 provided in bracket 93, stern 95, and bracket 96
Electrode 92 is preferably rotated, in a manner
and stem 96, respectively.
to be more fully described hereinafter, in such a
For reasons as will appear more fully herein
after, the brackets 93 and 90 are preferably
mounted on a horizontal frame forming an acute
20 angle with the common plane of the electrodes
9| and 92.
'
'
In order that the electrodes 9| and 92 may be
iirmly and rigidly supported by the brackets 93
and 99, respectively, the brackets are preferably
of unsymmetrical construction, the one, 94, being
of an increased length since it extends across
the -wider portion of the above-mentioned angle
between planes. Similarly, the stem portion 96
of the electrode 92 associated with the longer
30 bracket 90 is preferably of an increased length to
give added rigidity to the connection with’the
longer bracket.
Electrodes 9| and 92 are preferably of analo
gous construction for reasons of manufacturing
economy so that a detailed discussion of elec
trodes 92 only will be given.
A
` Referring now more particularly to Figure `2,
direction that the upper head portions of the
electrode members are' leading with the extreme
tip portions trailing; for the electrode 92 the
rotation, as seen looking ,down yon the electrode 20
(see Figure 3) is in a counter-clockwise direction.
An individual electrode member v(see Figure 4)
illustratively moves in a direction from the left
to right with its upper portion leading and with
its lower tip portion trailing. A horizontal sec 25
tion taken' through the main portion of the elec
trode member (see Figure 5) is elliptical in form
and through the tip portion substantially egg
'shaped in form (see Figure 6) thus giving a sub
stantially stream-line construction to the slanting
electrode member which effects a minimum dis
turbance of the ambient air, the desirability of
which will appear more fully hereinafter in con
sidering certain electrical actions of the appa
ratus, as the electrode is rapidly rotated as in'di 35
cated above.
While various numbers of electrode members
there is shown at 99 an inverted dish-shaped
may be used in the construction of an electrode
housing preferably of cast aluminum, having high
depending upon the diameter of the rotatable
electrode, the number of rings of concentric elec 40
trode members, the size of electrode members,
and the spacing between them, I conveniently
40 electrical conductivity, with a central bumped
body portion 99B and a fiat rim portion 99".
- Fastened to the inverted?dish-_shaped hous
ing 99, by suitable screws |00, is a dish-shaped
housing portion |0| also preferably of cast alu
45 minum having a central downwardly extending
body portion i0!a and a ilat outwardly extending
rim portion IUI”.
The outer rim portion lùlb of the lower por
-tion of the housing preferably includes two con
50 centric thickened ring portions |0|,‘s andv lûld,
leach of which is provided with spaced hole por
tions |0|° (see also Figure 3) in an alternate or
staggered relation which- are adapted to receive
electrode members |02. Between concentric
thickened ring portions |0|c and |0|d of the rim
|0|b is a relatively thin interconnecting section
|0|f, and similarly between the inner thickened
ring portion |0I‘i and a central downwardly ex
tending body portion |0|ß is a relatively thin in
80 terconnecting -section lßlß; this construction
employ electrode members spaced from each other y
in a circle so that their projected lengths are
approximately equal to the distance between these 45
projections.
'
-
'
The diameters of the illustratively two con
centric circles in which the electrode members
are arrayed are preferably such that the pro
jection of the outer circle falls beyond both 50
edges of the conveyor belt 28 (see Figure 3),
while the projection of the inner circle overlaps
and just falls outside of the path of travel of
the packaged product or articles to be treated;
the diameter of the larger circle is preferably 55
slightly greater than the width of conveyor belt,
while that of the smaller circle is slightly less.
For a conveyor belt of about 14 inches in
width, the outer ring of electrode members is
about 16 inches in diameter including illustra 60
makes for a saving in material yet permits ade
tively 9 electrode members of 4 inches in length
quate mountings for the electrode members |02. spaced 40° apart, while the inner ring of electrode
The various electrode members |02 are pref- ‘ members is about 101A inches in diameter in
erably of identical construction comprising (see cluding illustratively 9 electrode members 4
65 Figure 4) a main cylindrical body portion |02“, inches long spaced 40° apart and alternating with
an upper iiat circular head portion |021’. and a the electrode members of the outer ring.
lower conical sharp tip portion -|02°. The various
The various highly polished, illustratively
electrode members are preferably made of nickel nickel-steel, electrode members are removably
steel tubing worked _into theform indicated and positioned in the Various above-mentioned holesy
70 highly polished, particularly adjacent the ex
provided in lower portion |0|b of the electrode 70
treme tip portions thereof, to give smooth un
housing and so held that their various iiat head
broken surfaces free from irregularities and portions |02b are snugly received within counter
small projections;` the advantages. to be derived sunk portions |0|h (see Figures 3, 2 and 4), by
from this construction will appear more fully contact with the lower surface of the flat rim por
75
tion 99b of the upper portion of the electrode 75
hereinafter.
‘
'
'
.
2,132,706
v
3
shaft stand 1s adapted to' lbe rotated about its
housing; upper and lower portions of the hous
ing being held in assembled relation by'screws l central axis with minimum frictional resistance
in the bearings and minimum windage imped
|00.
With ‘this construction the various electrode ance (due to the effective stream-line construc
members may be removed and replaced by other tion of the various electrode members).
Driving energy for rotating the electrode
electrode members of the same kind or by elec
trode members of a different kind, v longer or
shorter, with the extreme tip portion sharper or
more blunt, or of a different material, all with
a minimum disturbance of the other portions of
the apparatus. Furthermore, such a construc
tion gives a good firm support to the various elec
trode members which in addition is well adapted
to transfer the heat produced at the tip portions
15 of the electrode members to the body of the elec
trode where it is readily dissipated; the construc
gle phase alternating current induction motor
generally shown' at vv|09, rated illustratively 220
volt, 6-pole, 60-cycle with a synchronous speed of 10
1200 R. P. M., preferably including a stationary
field 110 mounted on shaft 96 and a rotating
armature v| Il associated therewith mounted on
housing 99-|0|.
The ñeld _I I0 preferably includes a laminated 15
iron core ||2 illustratively comprising a stack of
tion is also ofVV highn electrical conductivity and , individual circular disks of suitable iron | l2a and
circular end plates I |21” of an appreciably'thicker _
light in weight, all of which make for a high op
iron.
The core is provided with a central hole
erating efficiency and an economy in manufac
portion ||2° which receives a reduced portion 20
ture.
‘The electrode housing 99 with its associated >96f of the shaft; the core is pressed onto the
electrode members |02 is rotatably mounted. as
indicated above, on` the shaft 96, the upstanding
or stem end of‘which, as above-mentioned, is
25 suitably secured to bracket 94.
i,
Shaft 96 is formed with a central enlarged
portion' 90a and with an adjacent narrow por
tion 96b which snugly receives the in'ner race
|03“ of the ball bearing assembly |03. `
The lower end of the inner race |03“ of the
30
ball bearing assembly firmly abuts a shoulder
portion 96° of the shaft between the expanded
and more reduced sections 9GB and 96h, respec
tively, and is held in firm abutting relation by
the retainingring |04 threadedly engaging the
shaft as at 96d;` thus, the ball bearing as
sembly |03 is securely mounted on the shaft 96.
The upper portion 99“ of the electrode hous
ing is provided with a central hole 99c in` thick
wall construction 99e adapted to snugly receive
shaft prior to the assembly of the electrode
until the'upper end plate |I2b abuts a shoulder
portion 968 of the shaft after which the end of
the reduced section 9Bf is mushroomed as at 96h 25
to press against the lower end plate | I2b and holds
the laminated core in a compact assembled rela
tion on the shaft.
The outer periphery of the core ||2 is slotted
as at H2X and wound with~the illustratively 30
single phase 6-pole winding |I3, in -the manner
apparent` from Figure 2 and- as is better indi
cated in Figure 8, diagrammatically. Its slotted
periphery may carry shading coils S (see Fig
35
ure 9) for better self-starting characteristics.
One end ||3a of the Winding is brought out
and grounded to the core as at |I2d, while the
other end .|I3b is taken up through a channel
portion 961'provided in the supporting shaft 96
where it is suitably connected'to conductor H0 40
associated with bracket 90.
Concentrically spaced about the field ||0 and
adjacent the` outer periphery of core H2 is a
the outer race |031’ of the ball bearing assembly.
' The upper part of the hole portion provided in.
the upper part of the electrode housing is of a
' ring-shaped laminated armature core il I. Ar
similar diameter so as `to provide a shoulder
mature |.|| is tightly received within recessed
45 which rests upon the upper end of the outer race-
|03b of the ball bearing assembly. Thus, the
electrode housing 99-|0| is rotatably mounted
on the shaft 96 with its weight sustained by the
ball bearing assembly |00.
50
To give a dirt-tight, dust~tight and grease
tight fitting between the rotatable housing
99-|0| and the ñxed shaft 96, the upper part
of the upper portion 990i the electrode housing .
is recessed as at 99c1 and fitted with the felt
55 washer |05, the inner edge of which lightly con
tacts the outer periphery of retaining ring |00.’
The fitting is completed _by dust -plate |06 in the
form of a iiat ring which is received withinl the
recessed portion 99d of the upper portion of the
60 housing and rests upon the felt Washerlûii; the
plate and washer are secured to the housing by
suitable screws |01. Dust plate |06 is preferably
so mounted on the rotatable electrode housing as
to clear fixed shaft 96 and'its associated retain
65 ing ring or nut |00 to allow free rotation of the
electrode.
To assure an axial rotation of the electrode
92
portions of the upper and lower portions of the
electrode housing with the upper and lower edges
adjacent the outer periphery abutting the upper
and lower portions of the electrode housing.
Thus, the induction motor armature is securely 50
fastened to the electrode housing with its core
properly alined with that of its associated ñeld
and with a proper uniform air-gap intervening.
The armature III preferably includes a squir
rel-cage induction Winding, illustratively of the
copper bar and brazed end-ring type. Such an
armature winding is per se known; it is diagram
matically indicated in Figure 8 at ille.
It may at this point be noted that induction
motor |09 is received within electrode housing 60
99----|0| allowing a suitable air space between the
field windings and the nearby Walls of the elec«
trode housing. The relatively thin walled sec
tions of the upper' and lower portions of the
electrode housing rapidly transfer the heat pro
duced in the motor core and windings (and par
tially given up to the air enclosed within the
housing) to the outer surface of the electrode
about the supporting shaft 96 and» central part
of the lower portion 9|, the electrode housing is I housing where it is rapidly conducted away or
dissipated by the ambient air through which the
70 recessed as at |0|k and snugly receives the outer electrode housing rotates upon energization of the
race portion |00a of the ball bearing Aassembly
|08, the inner race |08b of which is pressed onto
a reduced end section 96e of the shaft. Thus,
electrode housing 99---|||| with its _associated
75 electrode members |02 is axially supported on
induction motor |09, in a manner more par
ticularly described hereinafter, 'illustratively byway of conductor H4 and the metallic bracket
75
94, shaft 96 and ñeld core ||2.
aisavoe
_ Mechanical driving energy is imparted to hous
tened to the insulating support by suitable
screws _|2|.
bers |02 causing the latter to whirl along their
prescribed circular paths in a counter-clockwise
direction, as above-mentioned, at a speedof ap
proximately 4500 feet per minute for the outer
ring of electrode -membersl and 3000 feet per
minute for the inner ring for the dimensions i1
lustratively given above.
.
'
lower horizontal ring portion lllEL of the insulat
ing support, there are provided a pair of parallel
tubular conducting compression members |22
and |23 (see Figure 3), the ends of which are
snugly received within suitable holes provided
in brackets 93 and 94.
10 ' Electrode 9|, as above-mentioned, is analogous
v
'
'
in construction to electrode 92 with these diil’er
Holes are provided at 93d and 944 to receive 10
opposite ends of the conducting tube §22 in -
ences,¿however; the induction motor associated
brackets 93 and 98, respectively, and similarly
with electrode 9| drives the latter in a clockwise
direction and accordingly the electrode members
is H5 associated with this electrode are slanted in
the opposite direction to those associated ywith
Ythe„oppositelygrotating electrode V92, withr their
extreme tip portions in a trailing position, in or
der tov realize the stream-line eñ‘ects mentioned
20 above in the consideration of the action of elec
. trode
92.
,
'
Electrodes 9| and 92 are rotated in opposite
directions with the extreme tip portions of their
respective electrode members whirling in, pref
holes are provided at 93° and 94° to receive op
posite ends of the tubular member |23 in the re
spective brackets 98 and 94.
,
-
.The upstanding loop] portions il'lb and ||l°
brackets H6 and H9, as mentioned above, the
lower edges of the extreme upper l'portion of the
loops ll‘lb and II|1° resting on toes ||8a and H9", 20
respectively. preferably made integral with the
respective brackets | I8 and H9; insulating‘sup
ports and brackets are preferably bolted together
to give a rigid and secure fastening Well adapted
to withstand twisting or turning aboutthe hori
illustratively 150,000 volts with respect to ground,
Brackets H8 and H9 are provided with offset
threaded upper portions H8h and H9", respec
more fully hereinafter.
`
In the upper electrode means, electrodes 9|
and 92 are maintained in spaced relation above
the conveyor belt 28 in the manner indicated by
the .electrode supporting - structure generally
-shown at H6 (see Figure 1) which preferably
f'includes an insulating framework ii'i which is
supported by metallic brackets H8 and H9.
Insulating support i l1 (see Figure 7) is prei'
4erably» cut from a large tubular piece of insu
v lating material, such as ».“dllecto” or laminated
“ bakelite ". h a v i n g ' appreciable mechanical
strength in additionto its high electrical insula
tion characteristics in the form indicated. From
a single short length- of tubing, two such insu
lating supports H1 andV |20 may be conveniently
cut‘having -ring portions H1* and |20“, respec
tively, and loop portions H‘lb and> ||'|° and |20”
-and |20°,- respectively, located on diametri
cally-opposite sides of the'respective ring por--y
tions ||`|a and I 20". Thus, two individual insu
lating supporting members are obtained from a
minimum length of insulating tubing with a con
sequent saving inmaterial ,and a reduction in the
cost of manufacture.
' Referring now back to Figure 1, the insulating
supporting member _H1 is preferably mounted
' symmetrically about a vertical axis with its ring
portion H‘i'e‘> lowermost and substantially hori-ß
60 zontal about which are mounted, at diametricaliy
15
of the insulating supportare secured to metallic
erably, a common plane spaced above and sub
stantially parallel to the ‘upper vconveying sur
face of the belt 28. 'I‘hese electrodes are adapted
to be maintained at a high electrical potential;
30 the manner and purpose of which will appear
45
v
~To prevent bending, twisting or warping of the
zontal axis as a result of lateral stresses acci
dentally applied to either the electrode means.
the electrodes or their supports.
-
-
tively, which are slightly inclined to| the vertical
by an amount equivalent to the incline of the
conveyor, or in effect substantially .perpendicular
.to the upper conveying surface ofthe conveyor
„belt 28. v To give a free and unencumbered 35
mounting for the electrode supporting structure.
brackets H0 and |I9 are offset outwardly, 'the
one H8 being oiïset toward the left, as seen in
Figure 1, while the other, 'Il 9,1 is offset toward
the right where theyA respectively engage parallel 40
threaded shafts or elevation screws |26 and |25
rotatably mounted in C-brackets iîâ and i2?, re
spectively, which in turn are Illustratively welded
to the upper and lower horizontal iron frame sec
tions 22°-|8f~ and 22d-I8”, respectively.
C-brackets |26 and |21 are preferably so con
structed that elevation screws |24 and |25, re
45
spectively. iournaled or rotatably mounted there
in are maintained perpendicular toV and in sub
stantial alinement with the upper part of the con 60
veyor'belt 28 and consequently in substantial
parallel relation with the axial mountings of
electrodes '9| and 92.
Bevel gears IMA-|29 are controlled by a hand
fwheel which is geared, through suitable gearing 55
(not showm" to the two bevel gears IZB-_|429> in
order thereby to control the raising and lowering
of the electrode structures.
` `
It may at this point be noted that as the elec
trode members are raised or lowered into posi 60
tions more’remote from or more adjacent to the
conveyor, the motion is purely translatory in a
Brackets 93 and 96 (see Figure 3) are prefer,
ably provided with convex curved upper por . direction perpendicular tothe upper conveying
tions 93" and 90b, respectively, which are adapted surface of the belt; the raising or lowering of
the electrodes is effected withoutchanging their 65
65 to contact the inner curved surface of the ring
'
positions
either> longitudinally or-transversely 'oi'
portion Hl’ß of the insulating support. Brackets the conveyor.
Some of the peculiarv advantages ,
93 and 90 are further provided with over-hanging derived from this construction are more fully
lip portions `03" and 95° (see Figure 1) which dealt with in my above-mentioned parent appli
squarely rest upon the upper horizontal edge of
70
the ring portion ,H1B or the insulating support .` To give a ñrm and rigidY support for-~*'~i”"70
the elec- '
which thus sustains a good portion `of the weight' trodes and at the same time to maintainJthem at of the electrodes and furthermore prevents dis
their.,„high electrical potentials, all without un
placement of the electrodes and metallic brackets due over-all size and weight of insulating ma
m about _a horizontal axis; the brackets are fas
terial, the support ill is cut in the form and M
v opposite points, metallic brackets 93 and 94.
cation.
-
y
>
l
5
aisavoc
manner described above and illustrated in Fig
ure 7 tol give a long electrical leakage path from
the racks I'44-I45 which in turn are electrically
connected to the electrodes of the electronic con
duction
devices |43, all as described in my above
the high potential electrodes to the grounded , mentioned
application. -Plate |14 is spaced from
the rear vertical metallic wall of the housing I0
Thus, a relatively long leakage path is pro
brackets.
'
`
`
`
vided for a desired height and width of insulat- ' and forms therewith an air> condenser, the me
ing support, or for a‘ desired length of insulating
i material calculated to withstand the high po
tallic wall being in connection through the frame
and related parts with the grounded side 200
ten'tials employed at a maximum permissible sur ' (Figure l) of the high voltage winding 20| of a,
.face leakage, a support of minimum over-all size high frequency transformer whose primary wind 10
and weight is achieved with a consequent _saving ing 202 is connected to a suitable source 203 of
high frequency current on the order of 640 cycles
in material and economy in manufacture.
- Cooperating with the electrodesßl andA 92 of per second. The other terminal of the high volt
age winding 20| is carried as by conductor 204 4
the upper electrode means and spaced immediate
ly beneath the upper part of conveyor belt 28 down through the high voltage insulating ter 15
and the insulating sheeting B2 of the conveyor minal 205 where> it is connected by a suitable
conductor 206 to a cross-supporting tube |22,
belt supporting structure 51.(Figure l) are ar
thus
impressing upon the electrodes 9| and 92
ranged cooperating electrodes. The lower elec
trodes are preferably in the form of two right the high voltage high frequency energy, with ac
tions and coactions as fully described in my co
20 cylinders |4| and |42 substantially coaxial with pending application, conduction devices |4| and
the electrodes 0| and 92, respectively. A suit
able number oi preferably identical electronic |42 being driven at a relatively low speed and in
opposite directions by the crossed insulating belt
conduction devices |43 serve as electrode members
|69 driven from the motor |68 supported as by
to` concentrate the discharge. The extreme out
standard 24.
side
diameters
of
the
cylinders
|4|
and
|42
of
25
the transformer casing 206 (Figure l)
electronic conduction devices are preferably is Within
a low voltage transformer whose primary wind
equal to or slightly less than the diameters of the
ing 201 receives energy from a source 208, such
circles traced by the extreme tip portions of the
. outer rings of electrode members ||5 and |02,
30. respectively, as they are whirled above the con
veyor (see also -Figure 2), while the inner di
ameter of the cylinders or electronic conduction
‘devices (as determined by the extreme diameters
above-mentioned less twice the cross-sectional
diameter of the individual electronic devices com
as a 110 or 220-volt power circuit and whose sec
ondary winding 209 is insulated from the primary 30
winding 201 for the high voltage of the trans
former winding 20|, having one terminal con
nected by conductor 2|0 to conductor 204 and
through the latter to the one or grounded side
oi’ the windings H3 (Figure 2) of the motors. 35
The other terminal of secondary winding 209 is
prising the cylinders) are substantially equal
carried by a conductor 2|| down through the in
to or greater than the circular paths traced by , sulating
terminal 205 and by way of insulating
the extreme tip portions of the inner rings of
conductor 2|2 (see also Figure 3) is extended into
electrode members M5 and |02 on rotation of
the tube member |22 where it is connected to the 40
40 electrodes 9| and 92, respectively.
Preferably, the electronic conduction devices conductors lili leading respectively to the con
|43 are in the form of elongated cylindrical tubes ductors ||3b (see Figure 2) to the other side of
of diameters substantially equal to the distance the windings H3. Thus, driving energy is sup
to the two motors.
between the inner and outer rings of electrode plied
As for details of other aspects of the construc
members ||5 and |02, and of such length that tion and as for the details of the action and co
they are adapted to be conveniently received
actions of the various parts, reference is to be
within the space between upper and lower sides made to my above-mentioned co°pending appli
of belt V20; illustratively the length is iìve or six
cation of which this is a division.
times the diameter.
As many possible embodiments may be made
The various electronic conduction devices Miti of the above invention and as many changes 50
are maintained in cylindrical groups 50i, and |02 might be made in the embodiment above set
spaced from electrodes 0i and 02 respectively, as
indicated above, by suitable racks» litt and i155 forth, it is to -be understood. that all matter here~
«and their associated supporting ybkes itâ and inbefore set forth, or shown in the accompany
|41, respectiveiy, preferably bolted to the side
wall portions ttl and 65 of the conveyor belt sup
porting framework (see Figure 3).
These cylindrical groups iti and Mit are re
spectively rotated about generally vertical axes,
00 but axes which are, more speciñcally, normal to
the plane of the belt 20. `The axes, therefore, are
respectively in line with the path ci movement
of the electrode structures ti--QZ when the lat
ter are adjusted by manipulation of the hand»4
wheel and respectively substantially coincident
with the axes of the electrodes 0|---02~ ¿is for the
details of the „mounting and driving `of these
groups |4| and |42 of electronic conduction de
vices I43, reference ls to be made to my above
.70
mentioned parent application.
_ Coacting with the metallic racks orv bases
|44--|45 is a condenser plate |14 (Figure l) po
' sitioned and insulatingly supported, as described
in my above-mentionedapplication, as by the in
sulating beam H0 and electrically connected to
' ing drawings, is to be interpreted as illustrative ,
and not in a limiting sense.
I claim:
,
1. In an eiectrical treating apparatus of the
type having a support member and a plurality oi
electrodes, an insulator comprising a segment GG
of a cylinder which segment includes a ring-like
portion and loop-shaped portions attached to said
ring-like'portion at spaced points, said ring-like
portion providing means for mounting said elec
trodes at points upon _said ring-like portion in
termediate the points at which said loop-shaped
portions are attached and said loop-shaped por
tions being mounted upon said support member
so as to insulate and support said electrodes from
said support member.
»
70
2. In an‘electrical treating apparatus‘of the
type having a support member and a plurality of
electrodes, an insulator comprising a segment of
a cylinder which segment includes a ring-like
portion and loop-shaped portions attached to 75
6
aisaroe
. said ring-like portion at spaced points, said ring
like portion providing means for mounting said
means are provided peripherally of the housing
electrodes at points upon said ring-like portion
intermediate the points at which said loop
12. An apparatus like-that of claim 8 in which
means are provided detachably supporting the
shaped portions are attached and said loop
shaped portions being mounted upon said sup
electrode means.
port member so as to insulate and support said
electrodes from said support member, and rigid
reinforcing means extending between the points
10 at which said electrodes are mounted.
,
3. In electrical treating apparatus a fixed
shaft, an electrode rotatably mounted upon said
shaft, an electrical motor the stator of which is
mounted upon said shaft and the rotor of which
is mounted upon said electrode, said electrode
comprising a_ bottom plate having apertures near
the periphery thereof and an upper cover mem
' ber, electrode members removably mounted in
said apertures, said electrodes being held in
place by said cover member.
4. In electrical treating apparatus a ñxed
shaft, an electrode rotatably mounted upon said
shaft, an electrical motor the stator of which
is mounted upon said shaft and the rotor of
25 which is mounted upon said electrode, said elec
trode comprising a bottom plate having a double
for supporting the electrode means.
.
13. An apparatus like that of claim 8 in which
the housing is. in two separable parts between
and by which the rotary element of_ the motor is
secured.
14. An apparatus like that of claim 8 in which
the housing has a portion extended over the
end of said stud member opposite from said
support, thereby _totally enclosing the motor ele
ments and said stud member excepting for the
portion of ythe latter secured to the support.
isA
15. An apparatus like that of claim 8 in which
the housing is in two parts, onepart being aper
tured to have one end of said stud member ex
tend therethrough for securing to said support
and the other part extending over the other 20
end of said stud member.
16. An apparatus like that oí claim 8in which
the axis of rotation of' the electrode means is
substantially vertical, the electrode means be
ing shaped to project in the direction of said
axis.
~
.
at'.
l
row of apertures around said plate near the pe
riphery thereof and an upper cover member,
17. In an .electrical treating apparatus, an,
electrode for a discharge comprising a movable
electrode members removably mounted in said
30 apertures, said electrodes being held in place by
said cover member.
carrier having openings therethrough for re
ception of removable electrode members, said
electrode vmembers being tilted so that their
5. In electrical treating apparatus of the type
wherein a product being treated is positioned
axes trail from the face of said carrier with
respect to the-rotation thereof, and electrode
members each having a portion adapted’to limit
ment zone and is subjected to the discharges> the movement of the electrode into the opening,
which result from impressing a high potential la portion ñtted in said opening and a tapered
upon said electrode structure, in combination portion substantially within a geometrical iig
electrode means, a main support, a secondary ure formed by projection of the cross-sectional
support comprising a stud-like member secured sh'apeof` the smallest part o! the opening along
40 to said main support in juxtaposition to saidA the axis -but beyond the end of the opening.
18. In anelectrical treating apparatus. an elec
electrode means, an electrode, meansior' moving
`said electrode comprising the stationary and trode fora discharge comprising a movable car- .
rotary elements of a motor respectively flxedly rier having openings therethrough for reception
and rotatably carried by said member, andmeans of removable electrode members, said electrode
adjacent an electrode structure within a treat
45 for holding a product to be treated in the space
between said electrode means and said electrode. v
members being tilted so that their 'axes trail
from the face of said carrier with respect to
6. An apparatus like that of claim 5 in which normal rotation thereof, and electrode members
the stud-like member is provided with a chan- _ each having a head portion adapted to limit the
nel through which driving energy is supplied to movement of the electrode through said opening,
'
'.
a substantially cylindrical portion fitted in said 50
50 the motor.
7. An apparatus like that of claim 5 in whichv opening, and a substantially conical portion sub
the motor is an electric motor and the stud-like
member is channeled and carries therethrough
conductor means to supply driving energy to the
se
motor.
'
8. In electrical treating apparatus, in combination, a main support, a stud-like member se
cured tò said support, said stud-like member hav
ing mounted thereon the stationary element of
an electric motor, a housing rotatably supported
by said member and having therein the rotating
element of the motor, and electrode means car
ried by said housing.
stantially coaxial with the cylindrical portion.
" 19. In electrical treating apparatus of the type»
wherein a product being treated is positioned ad
jacent an electrode structure within a treatment 55
_' `zone and is subjected to the discharges which re
'sult from impressing- a high potential upon said
electrode structure, in combination, a high volt
age discharge circuit having spaced v.means be
tween which discharge takes place, said spaced 60
means including a support, a discharge electrode
and means comprising a socket in said support
for removably mounting said ‘discharge electrode
I
9. An apparatus like that of claim 8 in-which
65 the housing is in two parts, each supported ro
in said support.
`
, 20. In electrical treating apparatusr in com
tatably by said stud member.. one above the sta- » bination, a stud-like member having mounted
tionary element and the other below the station
ary element.
'
65
thereon the stationary element of a motive
f
10. An apparatus like that of claim 8 in which’
70 `a terminal or the motor is connected to the stud
member, the latter being channeled, another
terminal of the winding having connected there
to a contacter. leading through the channel in
said stud~ member.
11. An apparatus like that of claim 8 in which
means, a cooperating rotatable element for said
motive means, a two-part frame-like means hav
ing portions between which said rotatable ele 70
ment is received, means for securing said two
parts together and for thereby clamping said
rotatable element therebetween, bearing means
for rotatably supporting said frame-like means
and hence said rotatable element with respect
9,182,708
to said stud-like member, and electrode means
carried by` said frame-like means and hence
adapted to be rotated upon rotation of said
\ frame-like means relative to said stud-like mem
ber.
' 21.`In electrical treating apparatus, in com
bination, a stud-like member having mounted
thereon the stationary element ot a motive
means, a cooperating rotatable element for said
10 motive means, a two-part frame-like means hav
ing portions between which said rotatable ele
ment is received, means for securing said two
parts together and for thereby clamping said ro
tatable element therebetween, bearing means for
16 rotatably supporting said frame-like means and
7
to said stud-like member, one oi' said parts of
said frame-like means having. a socket, and an
electrode seated in said socket, the other of said
parts of said frame-like means having an exten
sion coacting with said‘socket to hold said elec
trode therein.
23. In electrical treating apparatus, in .com
bination, a stud-like member having secured
thereto the stationary element of a motive.
means, a two-part housing rotatably carried by 10
said stud-like member, said housing having
therein the coasting rotatable element of said
motive means. an electrode. one of said parts
having seat-forming means in which a portion
of said electrode is seated and the other of said 15
parts
having a portion coaeting with said seat
hence said rotatable element with respect to said l forming means- to hold saidy electrodegagainst
` stud-like member, th'e'two parts otsaid frame
like means having juxtaposed portions which are removal from the latter, and means for holding
two parts together.
separable when said two parts are separated, and said
24. In treating apparatus oi' the type wherein
20 electrode means carried by said irame-like a product being treated is positioned adjacent
means and held in place by said two separable
an electrode structure within a treatment zone
portions.
.
`
and is subjected to the discharges which result
- 22. In electrical treating apparatus, in com
from impressing a high potential upon said elec
bination, a stud-like member having mounted trode structure, the combination of, a support
thereon the stationary element of a motive ’ ing shaft, a motor having stator means mounted
means, a cooperating rotatable element for said upon said shaft and rotor means mounted to
motive means, a two-part frame-like means hav
move about said stator means, and electrode
ing portions between which said rotatable ele
means mounted to move with said rotor includ
- ment` is received, means for securing said two ing a hollow shell and a discharge portion hav
30 parts together and for thereby clamping said
rotatable element therebetween, bearing means ing thin metallic walls.
for rotatably supporting said frame-like means
FRANKT-IIN S. SMITH.
and hence said rotatable `element with respect
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