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April 18, 1950
-
M. G‘. PRIETO
2,504,349
WATER PURIFICATION APPARATUS
Filed March 30, 1945 ‘A
4 Sheets-Sheet l
m(
is
A
INVENTOR:
Mmuzz. 6. PR/ETO
BY
M, WA/M
AT70161/5 Y6
April 18, 1950
M. cs. PRIETO
2,504,349
WATER PURIFICATION APPARATUS
Filed March so, 1945
4 Sheets-Sheet 2
23
INVEN TOR.
M/ 0051. 6, PP/ETO
wénwiw‘
1770,6165 Y5
April 18, 1950
2,504,349
M. G. PRIETO
WATER PURIFICATION APPARATUS
Filed March 50, 1945
4 Sheets-Sheet 3
INVENTOR.
M/GUEL 6. 39/570
BY
MMAW
April 18, 1950
2,504,349
M. G. PRIETO
WATER PURIFICATION APPARATUS
Filed March 50, 1945
4Sheets-Sheet 4
'mmwmn
F'IE.EI
F'IEJE]
‘
IN VEN TOR.
M/az/a 6. Pi/nv
BY
71%, M #M
iiatentea Apr. 18, 1950
‘2,504,349
NI TED
OFFICE
-&2;504,349
‘WATER‘PURiFI’CATIUNKPPARATUS
‘Miguel G». Prieto, :Cliicag‘o, Ill.
'Apiilieiitimi'ma'rth 30, 1945, Serial No; 585,740
ssaemms. (CL-212102)
‘This ‘in'VeIiti‘c'ih ‘relates to‘ dév'ices'i'fbr‘ the‘p'u'ri;
?batiii'n‘of"water‘aiid"particularly'peftaihs’t‘ an
‘of thfe'base se?tionrlvlia?d thee‘over‘ seé’tion' were
apparatus for such purpose utilizing ultraviolet
fay?aiiips‘for ‘ais'pusme er haeteria?in-"d?hkmg
openpo‘si'tiom as iliustrat'ed‘inwig. 3,-"acc'ess may
water.
4_
I
_
eéjmplememm,
“When the cover‘
‘as‘dllustrated.
section“‘l2 "is in upraiséd
' - or
be‘ had ‘to ‘the/‘germicidal *la'i'ri'ps- - ‘I 5 carriedv by" the
I
‘It the principal‘ ‘object or ‘my’ ‘present-"inven
tion to provide an improvedapparatus for. puri~
pater "section' |2"-‘-'a'nd~ to‘awater tray‘ l?marr'ied
by theba‘seseetion- I I . "The'water-trayl 6 is rigid;
?bétion “of " ?r'ihkihg?water, in Whichapparatus
1y"iastehedmiithin-thei'b‘ase section“ l I‘and‘ is’s‘o
the" ‘puri?cation "iei’retted’ ‘by ‘subjecting’ {water
ii?s‘siii'g ‘thei‘etlii‘o?‘éh to‘the "ger'miiiidal'e?e'cts
constructed" that~waterPdelivered thereto ‘for'pu
i‘i?eation-Will‘ travelby "gravity 'in='a~‘tortuous "path
of‘ ultraviolet" rays.
thereovei" from the *inlet'to‘the'?isbharge.
7
I
which 'i'sof
;
For this purpose the water tra‘y‘i? is'io'rmed
ofithree‘ ‘integral ‘sha1low"troii'ghs‘ f1; {Wand ' 'l 9,
'“ It'isJa‘ fi‘?'t
objeevéf mypreseminvéntich to
provide “a,
vice “of the ‘character "referred ‘to
which "arehdis'pose? in‘ ‘sid’e‘by side ‘position and
‘1e; 't‘om'p‘a‘gct‘ahd inexpensive tom
strue‘tio ‘1 and 1 whiqh“ aeeess 'tdthe’variou‘s‘parts 15 extend in“ parallelism longitudinally of‘ the ‘nous;
ten ‘beréadnwhed for‘ ~e1e‘an‘sirigpurposes.
i'ng. vThe‘troughs‘31"!’and ‘(9' are' similarly ‘inclined
I
b'iit at"Hi?erentfelevatiohs,‘ while-lithe‘trou’gh i8
The invention ‘is exempli?ed in thé'follhWi-‘ng
?e‘s‘oi'ipti'dii
'illus‘trated’bYWay‘b‘f example in
,i's’bp‘positel? inclined to Y the same‘deg‘ree ‘and ‘its
theaceempa
upper: end" is ‘on the ~=1eve1 with‘ the‘ ‘lower end-"oi
in'g?mwingsym'whichz
_
‘lower end is=orr=approximateé
new in elevati‘oirof a device ‘éiiibodye 20 the‘ trough ‘I 1.
1y‘- the-"l'evel of’ the upper‘ end ‘b'f‘the troughi l9.
iiifg‘on'e‘ form‘ of my‘ invention,
‘v k _
The‘ ‘trough: 1'8 eomm‘unieat‘es- a‘tti'ts ‘upper end
‘ “Fig. 2 'i‘s'a'froh‘t "elevation ‘of the samei‘withthe
‘Fi’g.
With'the 'l'owere'nd bf‘jthe‘ trbu’gh IT'and‘COi‘h
cater portion‘ ‘in""elev‘ated "'or “open position.
"'F'i’g." 3 ‘is a" transverse s'ectibnafview’ o'f theiappa;
ratu's'taken‘onlih'e‘3436f Fig.
7 _
i‘ii'i'inicates'at its "lowere’rid with the’ upper-end
of the trough'lQ; as illustrated;"s'o'tha?water‘?ei
h
litered'fto" itheluppe‘r' end-‘of the trough I"! "will
tratel‘l’ongituii'in‘ " thereover, .thenc'eiaterany
water‘ passes
‘ tiew'ofthe trey'evefwmcmhe
iht'o the"'1'1ppe'rend'of'the trough’ Hrandieverse
a'*tortubi1sfpath.
its ' ion'gituélingal f‘t'ravei ‘so ‘as to ‘ ‘pass over ' the‘
_
Fig.1’? 'i’s ‘a"""centi‘al “var-um "seem/511* there
thigh ‘TB‘éJiid ?ep‘o'sitf'in ‘the ‘upper’ end ‘o’f'the
trough "[9. “At this"pbint"‘it’iilischarges vl‘afte‘raliy
into‘the uppereeneer the trough’ I‘Q'and-ag‘ain
Fig. *8 ‘is "a View‘ like“ Figfh‘wi‘th the" ‘exception
reverses’ its ‘travel and.‘ travels longitutiina'ily"=-‘of
the trough 1'9‘t‘o'a; éli‘soharge spout 2B,‘ which-- opens
't'h'at‘gthe _-¢dver ‘and ease patronsvereeseparetea
iiit’o‘the ‘trough 3'9 adjacent "‘the*lbwermost'*end
to " “snow I the ‘manner in ‘*Whi‘éh they i‘ “may “he
thereof. 'Thus?it"
lc'l‘elan's'ed.
into’ ‘ the tray 16: ~‘will“travel
“Fig; 6 is a ‘side"e'leva'ltibn“of Ws’eed?d
the invention may‘ ‘assume.
which
30
’
‘seen ‘that water‘délivered
‘ 'a""t'or~tuo'us ' ‘path
the'reover ‘by ‘gravity in-a‘ comparative-1y shallow
sheet; fro'mi'the point "of *inlet' to‘ the poirit-of‘di'si
40
charge.
_
'
Mounted? inf-the mover 's'ec’tidn" 1:2 ‘ "oft-he housing
are the Eth-re‘e' ~-‘g‘ermi'<'§idal- Slazi‘rnzas ‘~15, “one being
provided. *for“ each *‘trou'gh
\t‘v‘aterl‘piiri?éatidn idetiice ~embbd§ring ‘the ‘pre
ferred term “or l‘iny ‘vinvention. illlhis‘i‘iappafaltus
comprises a-‘ho'using divided into albase-"povtien
‘I I‘ andaa, ‘cover vportion .12 lai‘ticuately connected
by‘ a hinge-ill. This'lhin‘ge “connectionienables‘the
coverportion-tobe‘upraised as illustrated inPFig.
:3. ‘When thelrcovereportion l2‘ iséihi'ilowereclljor
‘closed vv‘position, “the r‘ base‘f'and' cover:- portions :11’! '
and ‘f2 er the housing ‘form-acompleteteiicaseh
ment for therinteribrhmecli-anism of?the appara
1 ‘430 El 9, " inclusive.
These/‘lamps- are soimouritéd' thec‘civer section
I! ‘of the *ihou'sinfgllthat’o?e centrally v'ovefliies arid
eiit'er‘i'ds‘flbngit?dlnélly‘t e‘ "run "length (if-leach
trough. 4'I1he’sé‘1l-‘ampS are mounted ‘i-n'ithe ~-'cov'er
sebtidn- 1l12l5so'thatI-Wheni5the coverifs'ectionl w I‘ '
inliclbse‘d position-‘as iillu'stra-ted
Fig.‘ 4,~e‘a’ch
lamp is disposed parallel to the bottom of it's-pair;
tiéi?ali‘ltiiddghlatalprepeiilyispaeedi'ctistanee from
that bdtt‘omuisoliias iit'o Lfo'iie'rlie ‘:waterrtravening
thereal'ong. m1 'other words, one‘ioftithev lamps
isPar-rangedlllonéitudmallyaotithe h'ousingain par;
$115.’ eTo accomplish? this the-front ahd'iend-iwall-s» 5.5 all‘elism with‘ithé'bottom,tofatheiltrough 11-1.’
2,504,349
3
4
next lamp I5 is mounted in the cover l2 to extend
in parallelism with the bottom of the trough l8,
while the third lamp centrally overlies the trough
l9 and is disposed in parallelism with the bottom
thereof. This is so that the water will be exposed
to the purifying bacteria killing e?fects of the
From this point it ?ows in a stream of even depth
downwardly of the trough I‘! and then laterally
into the trough l8, and then downwardly of that
trough and thence laterally into the upper end
of the trough l9. From this point it ?ows down
wardly to and thence through the discharge
spout 20. The angularity or slope of the troughs
I‘! to I9, inclusive, is such that the water will ?ow
in a stream of substantial uniform depth with
a minimum of turbulence throughout its
lamps equally during its entire tortuous travel
over the tray I 6.
It should be pointed out here that the tray 16
and the troughs formed thereby are made of 10
suitable material having a high re?ecting and
tortuous travel over the tray l6. During this
low absorption factor so as to maintain a con
time the circuit through the germicidal lamps is
tinuous repulsion of the ultraviolet rays bom- .
completed so that the latter will radiate ultra
barded by the lamps and assuring a continuous
violet energy, which energy rays will bombard
crisscross of the violet rays through the body of
the water as it travels through its tortuous path
the water while the latter is in motion over the
‘to dispose of the bacteria therein.
troughs.
For the purposes of replacing the germicidal
It is intended, as previously pointed out, to
lamps or cleaning the unit for any reason what
provide a water ?ow over the troughs evenly
soever, it is merely necessary to elevate the cover
spread over the bottom thereof and of a substan
section 12 which completely exposes the entire
tially uniform depth in order that the ultraviolet
interior of the housing and all Darts thereof so
energy radiated from the lamps will be effective
that the same may be cleansed or replaced if
in reaching throughout the entire water depth
and thereby be e?ective in killing all bacteria
therein. The tortuous path Which the water
takes through the present. apparatus and the
slope of the troughs is such that suf?cient time
elapses between the delivery of the water to the
troughs and its discharge therefrom to enable
the ultraviolet energy radiated from the lamps to
be completely effective indisposing of all of the
bacteria therein.
For increasing the effectiveness of the lamps,
I provide each of them with a semi-circular re
?ector 2|. These re?ectors are interconnected
and are rigidly secured to the cover section ll!
of the housing and are disposed in correct re
?ecting position with respect to each lamp. They
are likewise formed of a suitable material with a
high re?ecting and low absorption factor so as
to properly re?ect the energy rays radiated from
the lamps into the stream of water ?owing
through the troughs. These re?ectors are, of
course, ?xed in the cover section l2 in paral
lelism with the lamps l5, all as illustrated.
Obviously, when the cover [2 is upraised, as
shown in Fig. 3, the lamps may be removed and
necessary.
If desired, the apparatus may be disposed on a
stand of any character or it may be disposed on
wall support brackets, as disclosed in the draw
mgs.
In the form of the invention disclosed in Figs.
6 to 10, inclusive, the housing is generally cylin
35) drical in plan and is composed of a base portion
25 and a complemental cover portion 26. The
cover portion is suspended on a pipe 21 which is
bent right angularly, as illustrated, and consti~
tutes not only a water conduit to the cover, but
also constitutes a bracket for suspending the ap
paratus from a wall or other upright support as
illustrated.
The base portion 25 of the apparatus is con
nected by a connector 28 to the vertical portion of
the pipe 21 in a manner that enables it to be
moved vertically coaxially of the cover and
pivoted about the pipe 2'! in a horizontal plane,
as most clearly illustrated in Fig. 8. By lowering
the base portion 25 with respect to the cover, the
interior of the apparatus will be entirely acces
sible for cleansing or any other purpose.
It will be noticed that the marginal meeting
the re?ectors quickly cleansed. Although the
edges of the cover and base portions 26 and 25
shape of the re?ectors shown in the drawings is
are complemental to form a comparatively tight
substantially semi-circular in cross-section and
water
seal therebetween when the two parts are
concentric with respect to the lamps l5, they 50 brought in juxtaposition for use.
may be parabolic or any other desired form or
The connection [between the pipe 2'! and the
shape which may produce a maximum re?ection
without departing from my invention.
The lamp sockets lid for the lamps are suit
ably mounted in the ends of the cover section and
cover 26 is most clearly illustrated in Fig. 7, in
which it is shown that the end of they pipe 21 is
?xed at the axial center of the cover and projects
downwardly therethrough. This is in order that
are suitably electrically associated with ballasts
water to be treated may be admitted from the
l5b and lamp starters I'5c. _ Inasmuch as the as
pipe 21 directly through the cover and discharged
sociation between the lamps and these electric
elements is old and well known, the circuits
thereof need not be described in detail.
At one end of the housing and carried by the
base section II thereof is a water supply box 22
downwardly over the axial center of the base
portion 25. A valve 2-9 is provided, as in the form
previously discussed, to control the amount of‘
water admitted to the apparatus.
Fixed within the base portion 25 is a circular
trough plate 30 which is so formed as to provide
connected with a source of inlet water by a pipe
23 which may be controlled by any suitable form 65 a shallow spiral and gradually declining shallow
of valve. This water supply box is so constructed
trough from its axial center to its perimeter,
and so associated with the upper end of the
thus providing a gradually declining spiral or
trough H, as illustrated, that the water, when
tortuous water conducting passageway from its
it ?ows into said trough, is spread in a wide ?at
axial center to its perimeter. This is most
stream.
clearly illustrated in Fig. 9 of the drawings.
In the use of the apparatus it is constructed
The formation of the passageway or trough in
and assembled as shown in the. drawings and
the trough plate is such that water deposited
water is delivered to the water supply box 22
over the axial center of the plate will discharge
from whence it discharges in a ?at stream into
into the upper end of the spiral trough or pas
the upper end of the trough ll .of the tray [6. 75 sageway and the same .will travel by gravity
ascetic
throughout the length of the ‘spiral passageway
in a shallow ' stream and discharge at the
perimeter of the plate. ‘For this purpose the
trough plate is formed with a port 3! connected
to a conduit 32 within the base portion 25, and
which in’ turn is connected with a spout 33 at the
bottom of the base portion forlthe discharge of
the water.
‘I
‘
_
The underside of the cover. member 26 is
formed to provide concentric re?ectors 34 for di
recting rays, of germicidal lamps'which are arou
ate in cross-section. These re?ectors are formed
of suitable material with a high re?ecting and
lamps overlying‘ the tray‘an‘d inpar'alle‘lism- with»
said troughs to radiate their rays throughv such
a- stream as it passes over said troughs.
2. An- apparatus of the" character‘ described
' comprising a.casing formedof-abase‘seotion-and
a cover section, a tray substantially horizontally‘
disposed in the base section and formedwith in-V
clined interconnected troughs forming. a ‘con-s
tinuoustortuous declining path over the tray,
10' germicidal lamps carried insaid cover section to
overlie the troughs when said cover sectio‘nlis in,
lowered or closed position with respect to» the base
to radiate their rays through a stream of water
low absorptionfactor so as' to properly re?ect
?owing by gravity over the tortuous. declining
the energy rays radiated from lamps into the 15 path formed by said troughs.
‘
'
stream of water ?owing over the trough or spiral
3. An apparatus of the character described
passageway.
_
.
,
.
Suspended at a spaced distance from the re
?ectors sothat they will be spaced likewise from
comprising a casing formed of a base section and
a cover section hingedly connected thereto, a"
tray disposed substantially horizontally in the‘
the troughs are two substantially circular germi 20 base section and formed with longitudinally in
cidal lamps 35. One of these lamps is of a diam
terconnected troughs so inclined as to form a
eter smaller than the other and they are con
continuous tortuous declining water conducting‘
centrically disposed within the cover portion 26
passagewayon the tray, elongated germicidal
in such a fashion that their energy rays will be
lamps carried by the cover section and overlying
directed through the Water passing over the spiral 25 the troughs when said cover section is closed and
passageway. The position of the lamps is such
extending substantially centrally and longitudi
that they are substantially parallel to the bot
nally thereof in parallelism with the bottoms of
tom of the passageway or trough and substan
the troughs at a uniform distance therefrom
tially overlying the same, so that the water will
whereby said lamps will radiate their rays
be subjected to the energy rays of the lamps 30 through a stream of water being conducted over
throughout its entire passage over the trough
said troughs.
plate.
4. An apparatus of the character described
The cover portion 26 carries suitable electrical
comprising a casing formed of a base section and
connections for directing the activating current
a cover section hingedly connected thereto, a
to the lamp. As the details of such connections
tray disposed substantially horizontally in the
are conventional, they are not here illustrated
base section and formed with longitudinally in
or described.
terconnected troughs so inclined as to form a
I should like to point out, however, that the
trough plate is made of suitable material having
continuous tortuous declining water conducting
comparatively small amounts.
said trough, and lamp means adapted to produce
passageway on the tray, elongated germicidal
a high re?ecting and low absorption factor so as
40 lamps carried by the cover section and overlying
to maintain a continuous repulsion of the ultra
the troughs when said cover section is closed and
violet rays bombarded by the lamps and assur
extending substantially centrally and longitudi
ing a continuous crisscross of the violet rays
nally thereof in parallelism with the bottoms of
through the body of the water, while the latter is
the troughs at a uniform distance therefrom
in motion over the trough plate.
in. ca whereby said lamps will radiate their rays
When it is desired to cleanse the apparatus
through a stream of water being conducted over
shown in Figs. 6 to 10, inclusive, it is only nec
said troughs, and means for delivering water to
essary to close the valve 29, lower the base por
the most elevated end of said path and discharg
tion 25 on the pipe 21 and then swing the base
ing it from the lowermost end of said path formed
portion horizontally out of alignment with the
50 by the troughs.
cover portion 26, This renders all parts of the
5. Apparatus of the character described, com
apparatus accessible for cleansing. Likewise, it
prising a casing formed of a bottom section and
renders the lamps accessible for replacement.
a removable cover section, a trough disposed in
From the foregoing it is obvious that I have
said bottom section and de?ning a path having
provided a very simple and e?‘lcient apparatus of
an inclined surface for conducting a compara
comparatively small size which may be used in 55 tively shallow stream of liquid through said cas
puri?cation of drinking water as it is used or in
ing by gravity, liquid inlet and outlet means for
Obviously, the
apparatus which I have disclosed herein will be
comparatively inexpensive to produce while
adapted for e?icient home use.
While I have shown the preferred forms of my
germicidal radiation, said lamp means having
60 a con?guration generally similar to said trough
and overlying the same when said cover section
is closed and being positioned in spaced, sub
invention, it is to be understood that various
stantially parallel relation to said trough sub
changes may be made in its construction by those
stantially throughout the full extent thereof.
skilled in the art without departing from the 65
6. Apparatus of the character described com
spirit of the invention as de?ned in the appended
prising a bottom section, a trough disposed there
claims.
in de?ning a declining path for conducting a
Having thus described my invention, what I
comparatively ?at shallow stream of liquid
claim and desire to secure by Letters Patent is:
through the apparatus by gravity, a cover section
1. An apparatus of the character described 70 and germicidal lamp means disposed within said
comprising a casing, a tray in the casing, said
cover section, said lamp means having the same
tray comprising interconnected shallow troughs
general con?guration as said trough and posi
for conducting a comparatively ?at shallow
tioned to overlie said trough in spaced relation
stream of water over the tray by gravity in a
thereto and in substantially parallel relation
tortuous path, and a plurality of germicidal 75 ship therewith substantially throughout said
2,604,849
trough i'or radiating germicidal rays through the‘
stream as it passes through the apparatus.
7. Apparatus of the character described, com
' prising a bottom section, a conico-helical trough
disposed therein de?ning an inwardly and down
8
aarsnnncns crrao
The.‘ following references are of record in the
me of this patent:
UNITED STATES PATENTS
6
wardly spiraling path for water, a cover section,
Number
and lamp means disposed in said cover section,
said lamp means having a substantially conico
[1,193,143
Henri et al. ______ -_ Aug. 1,
Goodall __________ __ Apr. 27,
Fischer __________ __ July 8,
McKinnis _________ __ Oct. 19,
Kiely _____________ __ May 2,
"2,332,099
2,347,954
_
shallow trough means in the casing comprising
an inclined surface for conducting a compara
15
Date
Henri et a1. ______ __ Feb. 11, 1913
helical con?guration overlying said trough in
1,582,677
spaced relation thereto and in substantially 10 2,248,618
parallel relation therewith substantially through
out the path.
8. A purifying apparatus comprising a casing,
Name
‘1,052,818
Number
1916
1926
1941
1943
1944
FOREIGN PATENTS
Country
Date
tively ?at shallow stream of liquid through said
' 486,754
Great Britain ____ __ June 7, 1938
casing by gravity, and germicidal lamp means
OTHER
REFERENCES
overlying and substantially parallel to said sur
face, and extending substantially throughout the
“Food Industrial," June 1936, article by James,
full extent of said surface along the line of ?ow 20 vDD. 295-297.
to radiate germicidal rays through said stream
as-it passes over said surface.
MIGUEL G. PRIETO.
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