US1985922A - Operating table illuminator - Google Patents

Description

Jan. 1, 1935. J. GELB 1,9855922 OPERATING TABLE ILJJUMINPVIOR Filed Oct. 17, 1951 4- Sheets-Sheet l N Q; N JNVENTOR.

%QA4 QM ATTORNEY Jan. 1, 1935. J. GELB OPERATING TABLE ILLUMINATOR 4 Sheets-Sheet 2 Filed Oct. 17, 1931 Q Q INVENTOR.

ATTORNEY v Jan. 1, 1935. J. GELB OPERATING "TABLE ILLUMINATOR Filed Oct. 17, 1931 4 Sheets-Sheet s @g Q! ATTORNEY.

Jan. 1, 1935. J. GELB OPERATING TABLE ILLUMINATOR Filed Oct. 17, 1931- 4 Sheets-Sheet 4 {IQ l EN TOR.

Patented Jan. l, 1935 were i OPERATING TABLE ILLUMINATOR Joseph Gem, New York, N. Y. i 'Application October 17,

1931, Serial No. 539,413

11 Claims; ((1240-11) My present inventionrelates to illumination,

and particularly is directed toward arrangements apparatus which are designed to secure intense, uniform, and shadowless illumination by artificial light over prescribed areas, which areas may encompass the entire floor area of rooms and similar enclosures, and/or working tables, or

benches therewithixn Illumination of this char- .acter is particularly desirable in the case of manual activities, where. -int ense, illumination is desired and where shadows cast by the head, hands or instruments of the operator or operators must be avoided, as in the case of surgical operating tables, draftsman tables, medal chasers and engravers benches and-game tablesnv .It is an object of the present inventiontto provide a novel illuminating arrangement which is adapted to yield a; uniform,shadowless illumination over a prescribed.area,v whether such area encompass floor area of an entire room, or merely a much smaller horizontal area therewithin, which arrangement-may be constructed of simple, readily available and inexpensive component parts, and. readily assembled by unskilled labor,

and which does not require. expensive and. complicated lens or optical condenser combinations.

Another object isftotprovide anilluminating fixture which is adapted-to make effective use of a relatively small light source togive *rise to a uniform and shadowless illumination and which, although it depends for .eflicient ,operationupon precise and predetermined adjuxtaposition'of the light source andthe'remainde'r of-th estructure, does not necessitateithe utilization of difficult and not readily manipulated adjusting'arrangements.

Another object is" to provide an illuminating fixture including lighting and reflecting. elements which must heaccurately positioned in respect to each other to give the maximum efiici'ency, which elements are substantially automatically adjusted tosaid position of maximum eflioiency upon assembly and installation. without need for testing and measurement, and without likelihood ofany change in the adjustment by loosening orshifting of the various component parts, even though subjected to considerable shaking, jarring and rough handling.

Another object is' to providef'an illuminating fixture, involving the combination of a lightsource and an annular reflecting arrangement, comprising a plurality of small, flat inexpensive, individ ual reflector elements in a unitary, compact and substantially rigid assembly with an accurately predetermined arrangement of parts, from'which assembly one or more of said reflector elements may be readily removedjforrepairorjreplac'ement, without returning the Vfixturef to j'thej lmanu'fac turer or dealer, and without theneed tor acom plete disassemblyfand der'a ri ment [subsequent reassembly mamm ry-me t; l. Another object to. provide alfcompletelyenclosed illuminating. fixture, partieularlyfadapted to, give .the intense; ,u'niformi nd 'shadowless illumination desiredupon surgi a1 operating tables, which enclosure. iswater pi'oor andv alsoso shaped as to lend, itself being readily washed;

and is? also not only ofpleasingappearance, butis free of any lprojecti'onsfshelvesfor;ledges which wouldfcollect dirt anded st, -vv'i'th resultant possi- .bility' fof infecting the {fi lder er atica l 5 Another object is topmvide an, illuminating arrangement,particularl adapted for surgical il lumination and, employingeaf relatively hotlhig hpowerincandescent lightsource which 'is-so constructed and arranged tnat. "t e heat generated therewithin, will. be readily-disposed oi=without being large" part-transmittedto the field of illumination andwithout'risli of ignition of any of the volatile. inflammable liquids and/or yapors icust'omarily[utilizedfbyisurgeonsi3 V i Other objectsa'r'e in nartfohyious andin part w pointed out hereinafterJ. ff f In one embodiment-oi the present invention; an illuminating fixture befconstr cted with an innerenclosure containing a, light f souregland having suitably positioned transparent wallaand with an "outer enclosure containing an outward- ,ly and downwardly sloping reflecting arrangement; .annularly, disposed around sai d source, for

directingftholight from said source downwardly andginwardly uponfi'a' predetermined area; The

fixture may besoconstrnctedfand arranged that the lightifrorn the source,..vvhich..may take the form of amen-p wer iiicandescentilamp, is reffl'ected ,downwardlyvjtfromla pluralityoi,.fflat refleeting surfaces, either of-polished metal or of mirror glass ..arra.ng'ed' as. a continuous band, which band mayfconvemenuy take. thejform of .frtistritted pyramidal or conical sections, the api'c'es' of whichare directed upwardly; Although thevfixture maybe .arrangedso as to permit some oflthelightto 'pass directly down to thefieldfof illumination, it isdesired'in a preferred embodimentto transmit alllight' tosaid field by ai reflectionirom vsaidiru'strated annular reflecting surIac'e'LHA light directing arrange- :rnent' is preferably positioned around, and closely adjacent to the light sourceor incandescentlamp, v and betweensaid source and the annular reflector l gated combination. character, the light sitioned centrally upon the ceiling of the'room lamp over its most effective zone to the reflecting surface, with assurance that such light will be transmitted downwardly and inwardly from all directions upon the field of illumination. The light directing arrangement between the lamp and the annular reflecting surface may take the form' of a plurality of horizontally disposed shields, plates or disks, with which may be combined an annular lens or condenser, if desired. In one, embodiment this arrangement completely shields the bottom of the light source and is so arranged about the maximum light transmit: ting zone, which for example mayrange from 45 degrees above the horizontal to- 45 degrees below the enclosing light directing arrangement and the annular reflecting surface, a stop ora stand is provided for the vlamp,against or: in which the lamp is positionedupon installation' 'and replacement, the lamp being provided with a suitable extension which'serves as a handle to enable'correct positioning also with ,aclamping arrangement to hold the lamp firmly in position The reflecting surface which may "consist of a series of trapezoidal-shaped mirrors orz olished metal plates,is preferably contained in a separate unit attached to the outercasingiof the fixture. F 4

This unit may. be'provided with a holding frame with upper and lower retainer rings, circular or polygonal in shape, said rings consisting of a plurality of individually removable arcuate sections. If it is desired torjemove or replace any one of the individual reflecting 1eme rs,.theeorresponding individualflarcuate sections of theretainer rims maybe removed', without'need ior tdismantling or for disassemblingthe wholestrucure.

The bottom of the reflector, particularlywhen it is to be utilized for surgi a Purposes, may be covered by glass, which glass mayibe "of heat j I enlarged scale of a condensing arrangement which maybe usedin Fig. l0, n

" Fig. 12 is'an enlarged fragmentary showing of and/or light absorbing qualitiesjand is protected from the heatof the light source by .thel'above described shields enclosing the" bottomj of said source.

As an additional of the fixture above'described, may be associated with a blower arrangement so that'jair willbe continuously circulated therethroug hdu'ring use, carrying away the heat generated to a place distant from the field of illumination. This feature may be advantageously combined with, an arrang'ement for'preventing' passage, of any. inflammable vapors, such as for. example those of ether,

chloroform, ethylene and so forth, to the inner enclosure where explosions oncombustion may result, this being accomplished in one form caus ing the cooling current of air to'firstpass through a body of an absorbent, such as activated char or silica gel enclosed between screens. f

The arrangements of'the present invention not only are adapted to illumination fixtures, but

also are mostsuitably applicable to' the uniform shadowless illumination of entire rooms and enclosures with white light, coloredlight or a varie In arrangements of this source may be preferably p0"- and may be enclosed by a horizontally spaced disk or plate arrangement of the character previously feature the inner enclosure described, with which may also be combined an annular lens or condenser. The outer edges of the ceiling are provided with a continuous series of reflecting mirrors or polished metal surfaces to receive the light in a substantial horizontal direction from the light source and then reflect it downwardly toward the floor to give the maximum field of illumination either upon the floor or at a desired distance thereabove. These reflector elements, which may take'the form of rectangular surfaces, may be individually or collectively adjustable so as to have diverse reflecting angles and the light reflected therefrom and/or before incidencetherewith may be caused to pass through colored transparent materials to give rise to variegated and artistic illuminating effects.

The invention is exemplified in the combination and'arrangements of parts shownin the accompanying drawings and described in the following specification, and is more particularly pointed out in the appended claims.

Referring to the drawings,

Fig. 1' is a side view of an illuminating fixture suspended from the ceiling,

Fig. 2 is a side sectional view of the fixture upon i an enlarged scale, a

Fig. 3 is a fragmentary sectional view downwardly upon the line 3-3 of Fig.2,

Fig. 4 is a bottom view of the reflector assembly of Figs. 1 and 2, removed from its casing,

Fig. 5 is an enlarged showing of a portion of Fig. 4. i 4

Fig. 6 is a side section upon the line 6-6 of Fig. '7 is a sectional view upon an enlarged scale 3 of the clamping arrangement upon the line 7-7 ification of the lamp housing of Figs. 1 and 2,

Fig. 10 is a modification showing diagrammaticallyin side sectional view an application to the general illuminationof rooms,

Fig. 11 is a side view partly in section and upon the reflector ele'me'nts of Fig. 10, and Fig. 13 is a side view upon the line 13--13 0.".

Fig. 12"showing the adjusting arrangement.

In Figs. 1 and 2 the illuminating fixture A with the inner'lamp enclosure B and the outer reflector containing enclosure C is suspended from the i ceiling, 20 by means of the cables 21 attached to the pins 22 on the exterior of the casing A. These cables lead to a suitable counter-weight and pulley arrangement 23 which may be of any suitable construction enabling ready adjustment of the fixture to any ceiling 20 are the lead-in wires 24, which pass height. Leading down from the through the tubular spindle 25 (see also Fig. 7),

to the. incandescent lamp 26 which is suitably at- ,tached to said spindle 25.by the bayonet or threaded connection 27. The upper inner portion of the outer enclosure C is provided with an opening to the edges of which is attachedthe domed cover 34 and the skirt 35 by the bolts 33, which skirt has inturned edges 36 supporting the chimney unit D and the deflector assembly F.

' The chimney unit D has acylindrical glass en- "closure 33 firmly held between an annular flanged ring 39 and a bellied base plate 40. The annular retaining ring 39 and the base plate40 are realso serving to attach the 319855922 tained in .position'fbyimeansof the". rods 45 :(see

also Fig. .3) and'thecylindrical spacers 46; :These .ro'ds form part ofthe deflector. assembly F. and they. carry in spacedirelationship the annular .disks 47,348; 49 and 50 and itheicircularo disks 51, 52 and 53'. 'The annular: disks encircle the lower part of the glass enclosure 38 and the disks 51, 52i an'd 53 are positioned'below and enclose" the abase'40 of the inner enclosure'ldr .The. upper ends of the rods'45 are suspendedfromthe in- The base 40 carries .asenes. or symmetrically positioned posts 58, two of which in. the. embodime'nt shown carry; the stand:-59,' which is provided with a circular opening. 60 inwhichthe bottomipf the lamp 26' rests in itsfinal position.

in order :to fixthe lamp in this: position, the splndle 25 (see also Fig., 7) is gripped by the split double tapered coupling sleeve-.61. This tapered sockets 65'and 66 to receive ,the'ends. of

the said sleeve,- the"nut62 has an expanded upper portion in the form of 'a knob or hub which may be easily and conveniently manipulated for ad- 'ju'stably connecting the skirt portion ofthe clamping nut to the associated threaded nipple-of the dome.

upstanding and From the, top of the inner enclosure l9'aby 'means of the vzl'ownvvardly'r extending brackets 71' is suspended the reflector assembly R. The; top ofthe assembly isifo'rmed by the sector plates 72 (see also Figs. 4, Sand 6), to the'outer edges of which are attached the upperretainers 73 and the straps '74. I The straps 74" carry the lower, retainers-75. 'Thecover plate 72 and theretain-- em 73 and'75 form annular g-roovesaround the top and bottom of the assembly in which are held the trapezoid shaped reflectors 77,- which are continuously'a-rrang ed in close contact with each other around the entirecircumference of the outer enclosure to" form a frustrated many-side pyramidal section. The retainers73 and 75 are attached together respectively; by thescrews 78 and 79 to form continuous rings,- saidscrews 78 retainers 7'3-hto the cover 72. A

The outer casing or enclosure C extends downwardly and outwardly from the-inner. cover 34 by the curved surfaces 86 and 87, which lend' an artistic appearance to the exterior of thefix- 'ture.. An indentation 89 at the junction'of said surfaces 86 and 8'? serves as a stop ,for'the top -01 the reflector assembly RV These surfaces 86 and 87 are respectively spaced from therooffi fl of the reflector assembly and from the annular reflecting zone '77 so that substantial air pockets p theiform of a cone or pyramid and will give a zone .60 of maximum illumination at a placewhere most of the downwardly'and inwardly reflected beams cylindrical wall 94 and a transparent bottom,

95 which may be ofw'glass, which" bottom is clamped betwen the inturnedlip '96 oithegcylindrical wall 94 and an L-shaped ring. 97 bolted to said wall at'98, theg'askets 99 assuring a dust and water-tight connection. 6

In assembly and installation .the :reflectoras.-

- sembly. -R ,may be .placed within. andwattache'd to; the outer casing C to which istheniattached the skirt .735 ofthe; inner enclosure B; '..The, upper chimney retaining ring 39 is then placedqiupon; theinturned 'lip36. and the chimney assembly F :1 including the disks 47, to 53, theiglass cylinder ,38 and the base plate 40-, all carried-.uponwthe. V

rods; 45 .andproperly/spaced by the cylinders ,46,

:is then attached to said ring 39 and said inturned' lip 36. The inner cover 34 carrying the spindle 4 25 and the'lampi 26 is next; placedzinr position.

The expanded portion of the spindle"25; above the coupling nut 62 may be then used as-ahandle to place the-incandescent lamp 267intoitsproper positionin the opening 60. The-coupling, nut 62 is then tightened, causingthe split sleeve 61 .to firmly grip the spindlein position. ,;Finally, the outer enclosure C, the domed cover 34,, and

the skirt 35' are bolted togetherhat 33; and-the bottom-cover assembly-E iszattached to. the lower edge of the skirt 92'. I

It.will;be noted that. by this procedure the relativepositions of the light and of.thefrustrated pyramidal or; conical reflecting surface, will-be definitely fixed in respectto' each, other; Asaa result the light radiatedover the mostteffective zone from. the lamp; for example overgza zone ranging from about45'deg'rees above thejh'orizontal to. 45 degrees .below the=horizontal,s-will be "picked'up to a maximumextentby thereflect'or zoneand transmitted downwardly through, the .glass bottom 95 to the field' of illumination. .The

annular disks 4'7, 48,149 and 5,0,: direjct the :light emitted from thelampover thismosteificient zone to the reflecting surface-77, 'andthey'may have '35 polished :or light reflecting surfaces, as may also theibottom of the false ceiling72to assure more .eflicient transmission and .diflusion of .th ji t t the reflecting zone. Y Y

; If, the lamp'is positioned above oritaawlemolcated' position the devicejwill not opera-teatits maximum efficiency and i a; relatively smaller amount of the radiation of, the lamp will be reflected downwardly in ,a satisfactory manner. It

will be noted, however,ithat the exactpositioning of the lamp;in respect to the; reflecting zone is -most readily: obtained without, the need for calibration, measurement, .or :testing, substantiallyautomaticallyupon assembly and installation .when theclamp ,26 is,--supported' in its stand 5e 59 -so, The clamping of thespindle by the nut 62 andthe, sleeve 61 will assure that the lamp retain its position even after considerable usage zandzhandling. ;jTo replace-thelamp 26it isonly necessarytoremove the-cover 34, andif desired, i

loosen the nut 62, reassembly of thenew lamp in the predetermined 'positio being readily accomplished as described.

The fixture will reflect,thelight'downwardly in intersect. This .zone of maximum illumination may=be;readily adjusted to coincide with a horizontal surface at any height within the room by 5 moving the fixture up" and down, the supporting Individual reflectingeleme n ts 77 a.'fter .periods of use, if of polished metal, maytarnish orif of ,mirror glass, .may crack, making it .desirable to remove them. a This maybe done without-deranging the whole fixtureand withoutrequiring readjustment of thelama r em e habq In Fig.

tom coverassembly E'and suitable individual arcuate retainers '73 and '75, whereupon the particu- '-lar reflecting elements 'l'l: to be replaced may be removed.

The air pockets and 91 will maintain a more uniform temperature adjacent the reflectors, and

iparticularly, if such reflectors are of mirror glass, there will be less tendency for cracking and breakage thereof due to sudden cooling of the exterior casingC. l= I a To prevent transmission of the heat rays to the field of illumination, and/or to give desired col- ,ored illumination, the glass chimney 38 and/or the bottom glass 95 may be'constructed of suitableabsorbent glass, which will transmit only the I desirable rays from the lamp to the reflecting surface and from the reflecting surface to the field of illumination. "The disks 51, 52 and 53 will also serve to prevent excessive downward heat radiation from the bottom 40 -of the chimney assembly B. a

To remove additional heat generated upon operation of the device, a stream .of air may be blown into the enclosure B by the blower .101 and the connecting flexible conduit 102. The air isthen removedby the flexible conduit 103 to some point preferably exterior ofthe room. The flexible tubes102 and 103 are attached to the top of the :cover 34 by means-of the These sleeves fit-intothe embossed openings 107 sleeves and 106.

and 108, and-:fare stopped against the top. or" the 'cover 34 by the shoulders 109 and 110. The sleeve l05is provided with'adownward extension 111 so, that the air will be blown intothe lower portion of the enclosure B and around the lamp 26.

1 To 'prevent'inflammableand explosive vapors,

such as of ether, chloroform and ethylene-which are widely used by surgeons as anasthetics, from flowing into the inner enclosure, it may be desirable in certain instances to place absorbent mate- "rial in the course of air flowing from the blower 101to 'theen'closure-B. I This may be conveniently 'accoinplished by placinga cartridge 112 containing granulesof silica gel, charcoal, or some other absorbentmaterial in the inlet sleeve 105, confined between screens 1 13 and -1- 14:,'Whl0h are held together by the inturned edges 115 of the metal cylinder 116. The inlet portion of the sleeve 105 is provided with a recess 117 to receive the cartridge '112 wh'ich is retained in place by the split ring 118.

Upon exhaustion the cartridge may be replaced by removing the flexible hose 102 and then the split ring-118w N 9 is shown a modification in which the base of the-chimney is provided with a transparent portion 119, which-permits some of the light from the incandescent light source to pass directly downward to the field to be illuminated without reflection. In this embodiment the parallel deflecting disk or shield arrangement F of Fig. 2 has been omitted, but if desired, the annular disks 46,47,43, 49 and 50 may also be incorporated in'thisembodiment to direct the light -outwardly'from the light source to the reflecting band. I 1 r In applying the-present invention to the illumination of rooms 'or other enclosures, (see Figs. 10 to 13) a light source 131, substantially of the construction of Fig. 2 with the outer enclosure C and the reflector assembly R omitted, may be suspended from the ceiling-132, and completely encircling the room at the junction of said ceiling and walls may be positioned a series of reflecting mirrors or surfaces 134 which will function substantially the same as the reflecting elements 77 of Fig. 2. It will be'noted that these reflecting mirrors or surfaces are rectangular in shape, and

F although they form a continuous band around the light source, are not annularly disposed, but conform to the configuration of. the room. If desired, "Ia lens or light condensingiarrangement 135 (see Fig. 11) may be utilized to replace, or in addition .to, the glass cylinder 38 of Fig. 2. The reflecting plates 134 may all be adjustable as a unit .(as shown in Figs. 12 or 13) or they may be individually adjustable. In Figs. 12 and 13 the actuating bar 136 is providedwith a worm 137 which turns the pinion 138, said pinion being clamped at 139 to a rod running along the. back of and attached to the mirrors or reflecting surfaces 134; By turn- .ing the actuating rod 136 anysuitableangle oi reflection may be obtained and the zone of maximum illumination may be adjusted to any, level within theroom. w

If desired, part of the light reflected from the surfaces 134 may becaused to pass through colored transparent or translucentplates 140, which may give a variegated or colored light effect to'the field of illumination. .If desired the plates 140 may be extended across, the entire-ceiling ofthe room to give a false ceiling and conceal the illuminating arrangement. To increase or modify the artistic lighting effects the glass cylinder 38 enclosing the light source or :the annular lens 135 (see Fig. 11) may also be colored or madejof special glass as shown.

The room asshownin Fig-Q10 is specially constructed so that it will'have retaining ledges 141 and 142 in which the reflecting surfaces or mirrors may .beplaced. If desired, however,by utilizing a retainer structure similar to the assembly R of Fig. 2 the illuminating arrangement of the present invention may be applied to substantially any room regardlessof .its size and construction, one or more central lightingsourc'es 131 being utilized togivethe desired degree and distribution of illumination. H c

As many changes could be made in the above construction,:and many apparently widely difierent embodiments of this inventicnjcould'be devised without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

WhatI claim is: 1. A surgical illumination fixture comprising a light source and a reflecting band encircling and spaced therefrom, said reflecting band and said light source being so correlated that maximum 'efliciency is attained when they are in fixed relative positions, enclosures for said source and said band being adapted to be opened respectively at 'jacent the transparent bottom thereof and having a depending cylindrical portion with transparent walls and a bottom supporting wall, a

stand in the lower part of -said'inner enclosure including supporting legs resting on said bottom supporting wall, an incandescent lamp supported in said stand, a hollow spindle attached to said lamp containing the lead-in wires and extending upwardly through the cover of said inner enclosure, a clamping arrangement to fix the-spindle to said inner enclosure and the outer enclosure consisting in part of a plurality of trapezoidal reflecting surfaces placed side by side in a unitary band and a series of individually removable arcuate retainers forming part of the .assembly around the top and bottom of the band.

3. In a surgical illuminating device,,the combination of, an outer casing including a band of reflectors, a housing disposed axially of said casing comprising a lamp member, a transparent element to shield said member, deflector means comprising a plurality of spaced annular plates encircling said element to deflect'the light rays from the member to the band of reflectors and means at one end of said element for seating a terminal of said member and position the latter at a predetermined elevation.

4. In a surgical illuminating device, the combination of an outer casing including a band of reflectors, a housing disposed axially of the casing and depending therefrom and comprising a lamp member, a transparent heat absorbing tubular element surrounding the member, spaced and horizontally disposed light deflector means encircling said element, the housing having a stand on which a bulbous portion of the member is;

seated, a spindle connected to the member and extending through a part of the casing and clamping means associated with the spindle and casing to hold the illmninating member in its seated position. 5. In an illuminating'device, thecombination of a stand, a lamp having a portion thereof seated on the stand, a transparent cylindrical shield for the lamp, light deflector means comprising a plurality of spaced annular plates encircling said shield and light reflector means to provide shadowless illumination.

6. In an illuminating device, the combination of a stand having an opening, a lamp having a portion seated in the opening and guided by the sides thereof, a transparent heat absorbing tubular shield for the lamp, spaced and opaque light deflector means encircling said shield, an enclosure surrounding the light deflector means and having a lower transparent but heat absorbing wall, and reflector means to provide a shadowless illumination.

7. In a surgical lighting device, the combination with a principal electrical light source comprising an incandescent lamp of a system ofrdeflecting mirrors adapted to reflect light rays on to a surf acefso situated relative to said light source as to receive shadowless illumination, light deflector spaced plates encircling said source and interposed intermediate the latter and said system and means to adjustably sustain said lamp fixedly with respect to said system comprising a member extending from said lamp, a cooperatingnut having an expanded manipulating portion, a nipple threadably engageable with the nut and tapered coupling sleeve seated between said nipple andv member and adapted to be contracted or expanded upon the actuation of said manipulating portion. M

8. In an illuminating device, the combination of, an outer casing including an annular bandreflector, a housing disposed axially of the casing and depending therefrom, a lamp disposed axially of said housing, a transparent cylindrical annular light deflecting'members encircling said shield, an enclosure surrounding said members and having a transparent closure disposed below said members and reflector means carried by said enclosure to provide shadowless illumination.

10 In'combination, a stand, a lamp having a portion seatedon said stand, a transparent tubular shield'fojr said lamp, a pluralityof spaced annular light deflecting members encircling said shield, an enclosure surrounding said members" and having 'a transparent closure disposed below said members, reflector meansremovably carried by said closure to provide shadowless illumi-- nation, and meansfor holding said lamp in its seated position} -11.v In combination, a stand, a lamp having a portionseated on'said stand, a transparent tubular shield forsaid lamp, a pluralityfof spaced annular light deflecting members encircling said shield,

an enclosure surrounding said members and having a transparent closure, a bandof reflector elements to provide shadowless illuminationand a frame carried by said enclosure for detachably supporting several groups of said light reflecting elements.

' JOSEPH GELB.

20 shield surrounding said lamp, a stand having an i

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