US1762383A - Subaqueous illumination of swimming pools - Google Patents

Description

une 1o, 1930.`

' Filed Nov. 1s. 1928 11- snefssmep 8 .mv ENTOR. gjfzflarzrzvoraezzy ATTORNEY leakage:

Itis another object-of my invention to pro- Pa-issie ,Ju-ae io, i930 l UNITED STA-TES- PAT-enrforricn Jonirnaancrs'aoonanhr, or aniimiwron, CONNECTICUT sii-macnews :iluminacion or fswnritmo :eoora .eppiiaioii nie-d november 1aI` lisas. 'serial no. '$20,237.

This invention relates to illuminating vide suclraii illuminating means for swimining pnols. i'rr3vhiclr.theiight source is located above the water level, thus-eliminating all danger of electrical shock tothe swimmers which might be caused by the short cirsource were submerged.

of the invention to provide a subaqneous light source at a suitable depth below the water l' level enclosed within a transparent glass tu-be which etectually insulates the light source and revcnts charging of the water vvith electric current in the event oa short circuit.

Itis a further object of the invention to provide simple and inexpensive means for conducting the light rays anddiiiusing the same into the -bod'y of water over a comparatively great area, such means in certain embodiments of the invention including means whereby 'the -effect of moving light rays in.

the various colors of the spectrum may be produced,

It is also an additional object of the invention in a further embodiment thereof to provide a plurality of light reti-acting prisms in .combination with power operated means for continuou'sy or intermittently projecting the colors o f the spectrum emanating from said prisms into thejivater conta-ined in the pool.

It is a. further general object of the inven-l tion to provide simple and reliable means whereby the light dit using means may be ad- .quently incorporated in the s-ubjoincd claims.

cuiting of current supply wires, the light '-so'rce .and means whereby the lightrays jus'ted vertically to various positions between the ivater level and the floor of the pool.

XV 1th the above and other objects in View, the inventionconsists in the improved illumina-ting means for swimming pool-s and in 55 -the form', construction and relative arrangement of the various arts thereof as will be hereinafter more f ul y described, illustrated in the accompanying drawinc" and subse- In the drawings, wherein I have illustrated several simple and practical embodiments of my invention, and' in -which similar reference characters designate corresponding parts throughout the several vie-ws,`

Figure 1 is avertial sectional -view through f one side wall of a swimming pool showing one embodiment of the invention in which a. suhziqiieous light sou rceis employed together with suitable means -for'in'sulating' the' same and for also diiiising the light raysinto the ivater of the pool;

2 is a horizontal section tak'e'n' on the lineQf-2ofFi .1; It is alsoa feature of another embodiment Fig. 3 isV a similar s ect'ionalvv-iew' showing 75 a slightly modified form of the glass insulating tube within `which .the light source is enclosed; l

Fioz' is a fragmentary elevation of one of the side 'walls of the pool havng'my"`inven-` tion applied thereto; I

Figs. ,5, 6 and 7 are .horizontal sectional views showing .severa-l different alternative forms of the enclosing tube for the light emanating therefrom may be reflected, reracted and difused through the pool water ;A Fifn8 isa. vertical sectional view through one -side-wall of a poolshowinganother em. bocliment of the invention applied lthereto;l

Fig 9 is a horizontal sectional view taken on the line 9--9 ofFig .8; i g v Fig. 10 is a detail vertical sectionithrouffh the lower end of the light conducting tuzhe showing the'mounting and arrangement of 95 the quartz crystal" f'.

Fles. 11, 12 and 13 are detail vertical seo tional views showing one form of the quartz c stal which ma be used;

igs. 14, 15-an 16'are rontelevations of loo s'rtiling andprovided at spaced intervals with v the device as vshoi'vn in Figs. 11, 12 and 13 respectively;

Fig-L 17 is an interior side elevation of the ool wall' showing thev embodiment illustrated in Fi". 8, parts of .the light. deflectiug mem bers being broken away;

Fig. 18 is a fragmentary'vertical sectional view through the wall or the pool showing another form of the light diffusing quartz crystal;

Fig. 19 is a diametrical sectional view through the quartz crystal show-n in Fig. 18;

Fig'. 2O is a sectional view taken on the line 20-20 of Fig. 19;

Fig. -21 is a front side 'elevation of the quartz crystal' shown in Fig. 19;

Fig. 22 is a vertical'seetional view through one side of the p'ool structure 'showing still another embodiment of the invention;

Fi'g. 23 is'a similar view illustrating an alternative form of the device;

Fig. 24 is a detail vertical section illustrating a modification ofthe construction shown in Figs. 18 and 19;' A

Fig. 25 is a similar sectional View showing the form of the device for lprojecting a concentlrated beam .or pencil of light into the Figs. 26, 27, 28 and 29 are detail views of various forms of rotatable light diilusing-c'ontrol discs ;1.

Fig.,30 is a detail plan view showing .one form of the light conducting quartz and arrangement of the refracting prisms;

Fig. 31 is an edge view thereof;

Fig. 32 is a. fragmentary vertical .sectional view of one side wall of' the swimming pool showing the mountingand arrangement of one of the rotatable light control discs in combination with'the quartz crystal and refrncting prisms;

Fig. 33 is an interior side elevation of the p ool provided. with the latter form ofthev dej.

vice;

Fig. 34 is a. view similar to Fig. 1 showing n still 4further alternative embodiment of the invention;

Fig. 3'5 is an interior side-elevation similar to Fig. 33 showing the latter modification;

Figs; 36 and 37 are views similar to Figs. 32 and 33 showing still another formof' the invention;

Fig. 3S is a det-ail front eleva-tion of the quartz crystal and light refracting prisms as shown in Figs. 32 and 36, and

Figs; 39 and 40' are views similar to Figs.' 32- and 33 showing another alternative embodiment of the device.

'In the various embodiments of my in\-er-.-A tion which I have selected for purposes o illustration, I have shown the same as applied to a pool structure, the side and end walls of which are built up of terra cotta and enameled brick, or brick faced with enameled vertically extending chambers, de rcssions or pockets indicatedat 5. 'These si( e and en .walls of the pool throughout the area thereof,

as well as the floor of the ool structure throughout its area are bacied by heavy water proofing fabric which is 4also carried around the depressions or pockets 5 as indi- -cated at 6. The upper ends of the vertical of the pool are faced with special shapesl of the terra cotta or enameled tile but are otherwise open to the flow of water and covered with the transparent glass plates 9 which are. vertically slidable4 in suitable guide ways formed in the tile and the gutter and life rail tiles 7. However-` itis not necessary to malte these transparent closures for the pockets or chambers 5 water tight, and the water from the pool may freely enter and circulate within these chambers around the edgesof the glass plates, which need not necessarily extend to the bottom of the pool.

In the particular embodiment of the invention shown in Fig. 1 of the drawings, at the upper end of each of the vertically extending chambers or pocket-s 5, atile 7 of spe cial form is interposed in the line of the gutter and capicourse tile 7 and 8,'said tile 7 interrupting the gutter channel, thebase'walls of the gutter sections sloping downwardly in opposite directions from said tile to-a suitable outlet as seen in Fig. 4 of the drawings.

The tile 7 is provided with acavity 10 thercin opening upon the u perijace of said tile and an Opening 1'1 o ,relatively small diameter is formed through the tile and com-- municates with the base of said cavity. Through this opening anl elongated glass tube 12 is inserted downwardly into the chamber 5. This tube may be of any desired length, but preferably is of'such length that its low er closed end is positioned substantially midway between the maximum water level of the pool and the bottom or floor thereof.

The cavity 10 is'adapted to receive a metal sleeve 13 which bears upona'anve formed on the upper endgo the glass tube 11 and holds the same tightly against the yannular shoulder surrounding the upper end of the opening 11. The u per end. of this sleeve is closed by a remova le ca 14.' which is flush f with the upper aceoft e tile 'I'. By the removal of this cap, access maybe had *for the purpose of feeding the current conducting wires 15 for an electric lam 16- of high wattage, downwardly into the g ass tube 12. These wires may be extended laterally y 1,763,388 I a guide in the of the sleeve .13

and an o g in the tile 7 beneath the floor. .tile which surrounds the .pool 'and connected by means of a plug with a conveniently lol cated surface outlet.

'With the arrangement above described, it will be seen that the interior o'f the tube 12 --being thoroughlywater tight, the lamp 16 is thereby protected. and the possibility of .the

19 water-shorbcircuiting the current so that the water would become charged, -is obviated. The lamp being located in the lower-end of the tube 12 provides directsubaqueous il;

Y v lumination of the bodyof water containedv 15` in thepool, the light rays being diffused through the wall of the tube 12 and plate- 9.

If desired. the latter may be colored. Also,A

-in order to intensify the concentration of light rays upon the pool water, the inner sur 2`0 face of the rear part of the wall ofthe tube 12 may be sil-vered or otherwise provided with a suitable light reflecting means.

In Fig. 3 of the drawings, I have illustrated another form of the tube 12 whi'chma'y'be provided'with sections each having a plurality of longitudinally extending plane surfaces 17 and with the Surfaces of one section being positioned at an angle with relation to the-contiguous plane surfaces of the adjacent section of the tube. This form of the tube may be 'produced in glass to -refract the light- 'rays 'emanating from the lamp 16 and diffuse the same into the pool water. In such casejt will be understood that the front side of the chamber or pocket 5 is covered by a colored or uncolored transparent plate 9.

In Fig. 5 ofthe drawings, I have shown` I the tube 12' enclosed within an outer tube 18 'of glass, the inner tube having thel rear side n of its wall silvered as indicated at 19. The outer tube 18; provides a protecting'casing for light may' pass may be substituted for the plates 9.

In Fig. 6 of the drawings,` I show another form ofv the enclosin and protecting .tube for thelamp bulb in willich said tube includes a. rear section 20 of relatively large diameter 55 having: an inner vrelieeting surface 21, and

the forward section 22 of. relatively small diameter. To the outer side of this section 22 of the tube, a body of glass 23 is suitably secured. The light raysdirectly' assing from e0 the lamp and those which are re ected by the surface21 through the glass 23 are projected along radial lines through the pool lwater.

In this case likewise, the f-ront plates 9 for the chambers or pockets 5 may be omitted.-

Fig. 7 vshows another alternative form of l a c the en in' which are emeis entirely farmed of light mfracting .glass and is with opposite sections caressing in thick-A '116,88 fromv the center of each ctlon to the, 2 v 'i opposite sides of the tube.

In :he construction illustrated in Fig. e of j l the drawings, instead o'f employing the glass tube 1-2, n metal tube 25 extends downwardl f if;

into the chamber or pocket 5 and the hig pqwered electric lamp 2s .is snif-.ably mounted 71;* 1n the upper `end of this tube to throw theY light rays downwardly through the tube. If. desired, the tube wall may be. provided with-a Vreflecting surface, such as whlte enamel, and a suitable form of reliector may "also .8 be directly associated with the lamp 26 so as y to intensify the light raysl A'second 'relatively short tube 27 is telescoplcally connected` orV associated with the lower end of .the tube 25 either interiorlyor 8s e'xteriorly thereof. .In the present instance, I

. have shown the tube 27 disposed within the end of the tube 25 and open' at its'upp'er end vso that the lightrays may have an -unob structed passage therethrough. To this upf om per end of the tube 27 an annular collar or gasket 28 is lixed and has water tight sliding engagement with the wall of the tube 25.

In the lower end of the tube 25 one fend of Provided. r

thecylindrical shank 30 of a light 'conductnsnf-T' ing quartzcrystal body 29 i s suitably secured. The body 29 vof the quartz at the other end of the shank 30 as shown in Figs. 8 to 10 of the drawings, `is of sem-ispheric'al form. Preferably, this body -is inthe form of a loo cupped disc having a rearwardly facing beveled perimeter, and the light rays passing through the quartz bod-yare projected :from i i .the perimeter thereof vagainst reversely angled faces 32 of the vertically psitijoned -105 light dclectng quartz members 31 which are .suitably connected with the lower end of Athetube 27 carrying the quartz crystal. The light beams are thus deflected' :11nd projected outwardly at diverging angles'thrugh' the 110 glass plate 9 into the pool.

The tube 27 is of 'such length 'as to permit I of a certain amount of vertical adjustment of the same together with the crystal 29 and thedeflecting members 31 relative to the tube 115 2'5. For this purpose, I may rovide any conventional mechanical fm'eans, utas herein shown, one simple device for this p urpc'isev may consist of the rod 33 extending down wardly into the chamber 5 through a suitable 120 bearing provided 'on the wall of the tube '1 0.' The lcwerend portion of this rod has threaded engagement in s. bracket arm 34 suitably fixed to thelower end of the tube 27- externally of the tube 25. Thus, by rotating this rod, the 15.13;,

light conducting quartz together with the -deflecting members 30 may be moved to various vertical positions Abetween thelower end of the tube 25 and the pool floor.

In Figs. 11 to 16 of the drawings,I` have 13 A... o N' sli'" -..i different forms of the quartz 'members which may be employed without using the deilecting members 31. In Fig. 11 the quartz member terminates at its lowerend in a, forwardly projecting hollow cone which 'presents a comparatively wide annular end face adjacent tothe glass 9. Thus as indicated by the dotted lines in this figure, the light beam i's projected through the glass crystal and into the bod of water in'the pool in the form of a. widely flaring comb of variegated light ra s.

In Fig. 12, the quar `z member is shown in the form of a hollow cup 3S having its concave side opposed to the "lass 9 so that in this case, as indicated by t e dotted lines in Fig. 11, a cylindrical tapering 'beam of light will be projected into the water in the pool.

In Fig. 13, the quartz member is shown in the form of a concavo-convex sector 37-havin g a forwardly presented semi-circular edge from which the light beam is projected into the pool.

In Figs. 18 to 21 inclusive, there is illus-= trated another form of the quart-z member in which said member is of the sectional fonn shown in Fig. 19 and consists of a plate or disc 38 formed on the forwardly projecting end of the cylindrical shank, said disc having its -wall reversely curved to provide an annu lar edge face 39 disposed at a suit-able angle and from which a cone shaped beam of light willbe 'directly projected outwardly through 'the glass plate 9 into the pool.

In the form of the invention shown in Fig. 22, the quartz member carries a suitable casing or housing 40 having its front side open and within which there 1s arranged diametricallynof said front side of the housing, a lightA deiiecting member 41 of triangular 'shape in cross section. The light rays from the `uartz 42am projected against the reverse y angled faces of .the quartz defiecting member 4land by the same -are deflected against an annular'or 'ring shaped light delecting member 43 which is secured within Y vthe housing or casino' 40. Thus in this case a cylindrical beam' o? light will be projected outwardly into the pow..

In Fig. 23 oft-he drawings, there is directly secured upon the angular end of the quartz cylindrical shank 42' a glass4 prism 44 from the reversely angled faces of which two beams of light in variegated colors are angularly projected upwardly and downwardly respectively, into the pool.

In Fig. 24', I have shown an alternative form of the .device 4wherein the quartz light conducting and distributing body 38' is formed separately from ,the quartz shank 42l and providedat its rearside with a suitably formed socket 4to receive theout-turned e Aend of said shank. A prism 45 vis interposed between said'shanlcand the quartz bod 38..

Thus as the light rays leave the sha 42* l l. l o

they are broken up into t they pass through the 45 by which 'e various colors'of the spectrum, and such colored light raya finally projected from the edge of the quartz member 38 in the form of a' variegated cylin- A drical light beam into the pool.

In Fig. 25 of the drawings, I have shown the quartz member merely in the 'forml of the cylindrical shank 42 having its lower endforwardly bent-or turned. A uertz member of this form is used where it is esired merely to Projecta light beam ir. the form of a'cylin- -drical pencil of relatively small diameter into the pool.

In a further embodiment-of my invention, I also rovide means 'for intermittenti nterrupting the .projection of4 the light eam into the pool water and which provides the illusion of a movin light Abeam which may be either white, or 1n the various colors of the spectrum. In order to secure this result,

erably use a quartz ,member of the kind shownl in Fig. 30 in which the light conductingI body of said member is provided with the for ed or divcrging branches 46 havingv plane end faces upon each of which is mounted a sinffle glass prism 47 ,acting by refraction t( proc uce the various colors of the spectrum. The rotatable disc is journalled upon an axis'centrally fixed with relation to the quartz-.body and ro tation in a. vertical plane closely adjacent to the glass prisms 47.

The rotating disc 48 as seen in Fig. 26 of the drawings is provided with two eccentric slots 49 therein which are arranged in opposed relation and are adapted to coo rate with the radially positioned prisms 4 .v In the arrangement shown, in -the rotation of the disc, it will be seen that the corresponding inner and outer ends of these slots pass over the inner and outer ends of the respective prisms 47 at the same time, thus permitting the same or contrasting color of the spectrum from the prismsto pass through said slots and be projected into t-he pool. Owing to the ccccntricity of these s lots, the color of the li ghtr beams will lie-constantly changingwithout interruption .until lthe outer ends of the slots move over the outer ends of the prisms, at

' provided with two series of'spaced openin 51, each series beinc'arranffed on an eccentric curve, so that in this case the same variations in 'color will be obtained, but the projection ofthe light beams will be interrupted by the openings of'small diameter 'and additional .-"openings of greater diameter; Thus, in this case u s-eacli series of said openings passes over one of the prisms, a lu'rality of beams of light of relatively di erent'size and colors will be projected at the same time.'

` In Fig. 29 the disc 54 is .provided withthe radially spaced :series of .openings 55 and in addition thereto with the slits 56. As shown,

these slits are curved. Hour-ever, they might' also be of' other geometrical forms land in other arrangements than that -shown in the drawings so as to produce a novel and attractive illusion of moving light beams of varieg'nted colors in the pool water. n

In the arrangement shown. in Figs. 32 and 33 of the drawings, I show another form of' the rotating disc 57 vrhich may be provide-d with any one ofthe above referred to means beams, or as shown in said tigures, this oise of closely 'spaced openings as indicated at 58.

This. disc 57 in the illustrated construction isprovided on it'speripliery with spaced radially projecting venes o r blades 59 against which waterunder pressure is delivered from the pipe 60 in tangential relation to the disc 57- so that said disc will be rotated in the manner of the common waterwheel. The pipe 60 may be supplied from the pump which is nsedin the retiltra-tion system of the 'pool for circulating Ythe pool water through s; suitable filter, or said lpipe may be directly supplied with Water from a suitable pressure line. The relatively small :excess of water supplied to the pool through the ipe nould merely replace the water whic splashes over into the pool gutters in the movements of the bat-hers.

In the arrangement shown in Fig. 32 the quartz body may be provided with additional' radiating arms similar to the .arms 46 in Fig. 30 and positioned at right angles thereto, or` this quartz body 6l may consists of a hemisphere having. a dat face opposed to the glass 9. Thus .provision is obtained upon either form of the quartz body for the attachment cf the radiating glass prisms 69. arranged at a 90 angle -with respect to each other sc that -in'eaci rotation of the disc, a greater number of light beams will be projected into the pool and the interruptions of these light beams will more frequent]l occur. ,stood that the ht rays from the high powered electric biliA are conducted substantial-4 ly' at their original intensity throuvh the quartz member and are received b the sev- A eral prisms 62 and broken upinto t e .various colors-o the spectrum.

'between the i for interrupting the projection of the li'vlitV 'ings It is of course, undern rigs' aliadas of the drawings, I .have

4shownanother form ofthe rotating disc which is composed of a plurality of angularly related sections 63, eachfsection prvid-ing a radially extending impingement surof these sections is provided witha single opening 64 therein, said openings being spaced at relatively different distances from' the center of rotation oi the disc. Thus, in this case, it will .be apparent that theelect of the moving light beams is alsoproduced with a. v'somewhatlonger period of interruption. However, as indicated in dotted lines in Fig. 35, I may also provideadditional prisms on the end face ofthe quartz body' ys o that the prisms will be spaced apart at a 45 angle. In Figs. 36 and 37, 1 have' shown still another embodiment of the invention wherein a rotating glass disc 65 is employed.4 To the iront surface of this glass disc Aa Aplurality of radially disposed reflecting members 66 aresuitahly secured.. The glass between .adjacent reflecting members may have differently colored sections as indicated at 5',oron e ofsaid sections may iidesired; be rendered opaque to interrupt the projectionxofthe-light beams. 1n this case; the dise is rotated in the Same manner as 'illust-rated in Fig. 33 of theldravv-v 111 Figs. 39 and 40 of the drawings, the rotating disc 67 is provided upon its front si`ir-l face with a plurality of parallel ribs or shoulders 67 so that inthe rotation'of the disct l'ie fully understood. The' several construe-mons referred to are relatively simple in 'thoform and arrangement of the severalelements and can heea'sily -mounted'iand arranged in operative positionlin the'bnilding of the oool at a nominal additional cost. It will be seen that in .each case, I .provide a means 'for very ef- 'l feeiively and attrmztively illuminating the the pool, and at the same time have entirely avoided the necessity of penetratingthe Water proof backing sheet 6 .of the pool structure'so that there will be no-liability'of -the leakage of the pool water therethrough.

In addition tothe several embodiments-of l'the invention referred to, 'it is also possible that similar results might be obtained inthe.

use of various other alternative mechanical forms of the invention, and I therefore, re-

serve the privilege of resorting to all such i legitimate changes therein as' may be fairly embodied within the spirit and scopo of the invention as claimed.

l u o iso I claim: A

1. A swimming pool structure having .a chamber in its vertical wall, opening into the pool and a transparent plate covering said .open side of the chamber, sub-surface illuminati-n0 means for the pool including a source of artificial light located abovesaid chamber, meansar'ran ed within the chamber for projecting a li it beam through said. transparent cover iat@ into the body of water contained in t ,1e pool, and means for conducting thelight from said light source to said beam projectingmeans.

2. L swimming pool structure having its wall backed by water proofing material, one of Athe vertical walls of the pool having a chamber opening into the pool, a transparent cover plate for said open side of the chamber, and sub-surface illuminating means for the pool including means for projecting a light beam through said transparent cover plate into the pool, and means for conductiner i light from an artificial light source to sai beam projecting means, an'd said illuminating means being mounted and arranged cntirely at the inner side of said water proof backing for the pool walls.

3. A' swimming pool structure having its walls backed b water proofing material, and

one of the vertical walls ofthe pool provided with a chamber opening into the pool and a transparent cover plate for said open side of the chamber, sub-surface illuminating means including means for defiecting and diffusing light through said trans arent cover platel into the pool'arran ed'wit in said chamber, a source of artificia light located above the maximum water level of the pool', and means for conductinnr the light from said light source to the .eflecting and diffusing means extendin g downwardly into said chamber entirely within the water proofA backing for the pool Walls.- l

4. A swimming pool structure having its walls backed by water proofingmaterialj-and provided with a chamber in one of-its vertical walls opening into the pool and a transparent cover plate for the open side of said chamber, subsurface illuminating means for the poolincluding an artificial. 'lig-ht source located' external-ly of said chamber, a lnrality of light retract-ing prisms arrange with in said chamber, means positioned inwardly of the water proof backing for theLpool walls and eit'endinvl into said-c iamber to conduct ligh from thetlight source to said prisms, and

vmeans for diffusing the light rays from said.

into the pool.1

5. A swimming pool structure having its walls backed by water proofing material and provided with a. chamber in one of its vertical walls opening into the pool and a transparent cover plate for the open side of said chamber, subsurface illuminating means for risms through said transparent cover plate use P001 standing anar-assai lights-@afee 10g cated externally ofsaid chamber, a plurality of light refractin'g prisms arranged within said chamber, means ositioned inwardly of the water proof bucking for the pool walls and extending into said chamber to conduct chamber, a sub-surface illuminating meansl for the pool including an artificial light source located externally of said chamber, a plurality of light rcfr'acting prisms arranged within said chamber, means positioned 'inwardly o f the water proof backing for the pool walls and extending into said chamber to conduct light from the light source to said prisms, and a power operated rotatable disc associated with said prisms and provided with openings progressively moving across the prisms lengthwise thereof in the rotation of the disc to vary the angles of projection of the light rays from the prisms through said transparent cover plate into the pool.

7. A swimming pool structure having itsi walls hacked by water proofing material and provided with achambcrinpne of its vertical walls'eninginto' the poni and a transparent cover plate for the open side lof said chamber, sub-surface illuminating means for the pool including an artificial light source located externallyof said chamber, alurality of light refraeting prisms arrange with'- Vin said chamber, means positioned inwardly ofthe water proof backing for the pool walls and'extending into said chamber to conduct light from the light source-to said prisms, an opaque disc rotatably mounted between the prisms and said transparent cover plate and provided with opposed' eccentric slots progressively moving across the prisms lengthwise thereof in the rotation of the disc t o cause a movement of the light beams projected rom therespective prisms through said slots into the pool, and means for rotating said disc.

8. A swimming pool structure -having'its wall backed by water proofing material and one of the verticalwalls thereof provided with a chamber opening 'into the pool and n." transparent-cover plate for said open side of the chamber, an artificial light source 'external to said chamber, and sub-surface illuminating. means for the pool inclndinga quartz body of predetermined geometrical form for projecting a light beam of the desired shape through said transparent cover plate into the niet;

los" i im. f

iis

pool, and means 'ii'.lmll",r positioned within sandl water proof backing for conducting light. from said artificial light .source to said quartz body..

9. A swimming pool structure having its wall hacked b v water proofing material and one of the vertical walls thereof provided with a chamber opening int'o the pool and a transparent covcrplate for saidopen side of the chalnheiuan artificial light sourcerxte'rnnl to said chamber, and'sub-s-'urface illuminatinff means for the ool including a uartz body of predetermined geometrical orm for project-ing a light beam of the de, sired' shape through said transparent cover plate into the pool, means wholly positioned within said water proof backing for conducting lieht from said artificial liffht source to one of the vertical' walls thereofprovided said quartz body, and means for iertically adjusting said quartz body in said chamber lrelative tosaidlight conducting means.

10. A Vswimmingpool structure havingits Wall hacked by water proofing material and with a chamber opening into the pool and a transparent cover plate for said open side of the chamber, an artificial light source external to said chamber, and sub-surface illumi'nating means for the pool including a quartz body of predetermined geometrical form for projecting a light beam of the desired shape through said transparent cover plate into the pool, one or more light', refractiving prisms associated with said quartz body, and means wholly positioned within said 'water proof backing for conducting light fro-m said artificial light source to said quartz bodv.

11. A swimming pool structure having 'its 13. V-sWiminin-p; pool structure having its walls -baclred by tra tcr-prooting material, one of tl.e "crtical Walls of Athe pool having a chamber-therein. and a transparent plate covv chamber therein opening -i-nto the pool and receiving water tlnrefromsuhsurface lllumi- A n'ati'ng means forthe pool armnged entirely at the inner side of the water-proof backing for the pool wall, said means including a li ght source, and means-arranged within said cham@ ber receiving light from' said source'and embodying light re f rac-ting prisms for disseminati-ng light in they formof a` plurality of light beams pi-ojeetcd over a comparatively extensive area into the pool water.

In testimony that I claim' the forcer-ing as my invention, Ihave signed my name 'ereto.

walls backed by water-proofing material, one V of the vertical' -:ills of the pool having' a chamber therein and a t ransparcnt plate covering the open side vof 'said chamber at. the interior of the pool, and subsurface illumi nating means for thepool arranged entirely at the inner side of the water-proof backing for the pool wall, said means including alight source, and means located within vsaid chamber for projecting light, rays emanating from said source laterally through said transparent plate into the pool water.

12. A suilii'miug p Ool struct-ure having its Walls backed by \-'ate.rproofing material,- one o f the vertical walls of the pool having a chamber therein and aitransparent plate covering the open side ofsaid-chamberat the interior of the pool, and subsurface illuminating. means for the pool arrangiedentirely at.

the inner side of the waterproof backing for the pool arall, said iueans including .a iight source, and means arranged within said ehamber for'difl'using light rays emanating from -said source and projecting the same laterally .through said transparent plate over a comparati rely extensive area into the pool water.

JOHN FRANCIS Boon-AEM,

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