US2300523A - Lamp structure - Google Patents

Description

Nov. 3, 1942; K K J.,H. RElcHART 2,300,523

I LAMP STRUCTURE Filed Aug. 51, 1939 s sheets-sheet 1 Nov. 3, 1942. J. H. RE'lcHAR-r LAMP STRUCTURE Filed Aug. 31. i939 -5 Sheets-Sheet 2 u INVEMOR .Jh/15.5 ffm/wm:

^ A ORNEY Nov; 3, 1942. J;- H, RElCHART'- '2,300Q523 LAMP STRUCTURE v Y Filed Aug. 3l, 1939 3 Sheets-Sheet 3 IVENTR' u atented Nov. 3, v1942 UNITED STATES TENT OFFICE LAMP STRUCTURE J ames H. Reichart, Muncie, Ind.

Application August 31, 1939-, Serial No. 292,826

(Cl. Z110-11.2)

4 Claims.

This invention relates to a lamp structure and its support.

The chief Vobject of this invention is to provide a lamp structure which, first, is more economical to produce and, therefore, can be sold at a much lower price than lamps of the same general character now on the market; second, to produce a lamp structure wherein certain inherent objectionable features cf the present lamp structures of the same general character as will hereinafter be pointed out are eliminated and third, to provide a support for such lamp structure proper, which is not only ingenious but has certain characteristics not otherwise found in prior lamp structure mountings.

The chief feature of the invention consists in providing a lamp structure and its support, whereby the aforesaid multiple object is accomplished.

Other objects and Vfeatures incident or supplemental thereto will be hereinafter pointed out more fully.

The full nature of the invention will be understood from the accompanying drawings and the following description and claims.

In the drawing,

Fig. l is a central sectional View through a portion of the lamp structure and its support, certain portions of the support being shown in elevation and also a lamp bulb included in the bulb socket portion of the lamp structure.

Fig. 2f is a transverse sectional view taken on line 2 2 of Fig. 1 and in the direction of the Fig. 3 is a central sectional viewtaken on line 3 3 of Fig. 1 and in the direction of the arrows.

Fig. 4 is a diagrammatic, comparative chart of light distribution curves generated by a point moving at a constant intensity, the three curves shown representing that from a bare light source, a lens type lamp structure with a light source of equal value, and a light source in the invention as illustrated in Fig. 1with a light source of same value.

Fig. 5 is a view similar to Fig. 1 and of the preferred form of universal joint and support connection.

Fig. 6 is a central sectional view of another embodiment of the invention, the bulb socket being shown in elevation and having a detachable connection to the bowl portion.

Fig. 7 is a plan view of the multiple mounting type base shown in Fig. 6.

Fig. 8 is a central sectional view of a receptacle type lamp base, the bowl, etc., being omitted for clearness and the mirror and cosmetic or shaving material container being shown in elevation.

Fig. 9 is an elevational View of another embodiment of bowl support.

Fig. 10 is a central sectional view through the base thereof.

Fig. 11 is a bottom plan View of the vase shown in Figs. 9 and l0, full lines illustrating the retaining position and dotted lines indicating the releasing position.

Fig. 12 is a perspective view'of a clamp-on type of support, the globe being omitted for clearness, certain dotted lines indicating Aa support, full lines illustrating the `clamping means engaging the latter and the dotted lines indicating the collapsed position of the clamping means.

In. Figs. l to 5 of the drawings, I0 indicates aA conventional plug type terminal and II an elon-V gated insulated cord containing two wires in electrical connection with the prongs Ia forsupplying current to the socket I2 having a local circuit switch therein and which is controlledv by a reciprocable member I3. The socket is of conventional character and no further description or illustration thereof is believed necessary.

In Fig. 1, I4 indicates a substantiallyspherical lamp bulb structure, which is detachably associated with the socket I2 and by means of the threaded neck portion or stem l5. This bulb is of conventional character and needs noV further illustration or description, except to point out that preferably this is of the lfrosted glass type,

so that the light filament in the bulb is not visible as such when the circuit is completed therethrough and energized.

A substantially hemispherical shell I6 includes a central opening Il deiined by a flange or collar l 8. This is either press-fitted or otherwise rigidly secured upon the portion I2a of the bulbsocket and the length of said'collar I8 is sufcient tol prevent cooking of the socket in the opening so thatas a result the socket is axially aligned with said opening-and is directed forwardly into the shell. v

The forward portion of the lamp structure includes a frustc hemispherical portion I9. It will be observed it is slightly more ythan half' of a hemisphere. The two adjacent circular edgesv are suitably connected together as by a tongue and groove connection which is of the clamp type. Herein portion It includes the tongue 2U. The portion I9 includes the groove 2| Vand the two are interlockingly clamped together in the assemblying operation. The-forward hemispherical portion I9 is directed inwardly as at 23 and thence inwardly and rearwardly as at 24, and then the central opening resulting therefrom is defined by an inwardly directed cylindrical portion of the desired length, if desired.

The result is that there is provided an outwardly directed flared face 26 upon the portion 24 and it will be noted that the light bulb I4 is seated in the opening 21 formed by the cylindrical portion 25, and the outer portion of the light bulb terminates in about the plane of the portion 23. Herein said bulb is shown projecting just slightly beyond said plane. It may be coincident therewith or it may be slightly b.,- hind said plane. In other words, the light bulb is of such size with relation to this lamp shell that preferably the forward portion of said bulb is substantially coincident with the forward plane cf the lamp shell, said shell constitutingthe two members which have been described in detail aforesaid.

While the junction 2li-2| has been described as occurring at the maximum circular portion of theshell, it will be quite obvious that it may be formed at some other location without departing from the broader features of the invention.

The interior of this shell structure including the portions 23, 24 and 25, are suitably coated or covered with a reecting medium. It has been observed that glare effect is reduced to a minimum when this interior coating is of -porcelainlike enamel or lacquer, white in color and preferably with a touch of blue to increase its white appearance.

Reference now will be had to Fig. 4. n this ligure A indicates a light source. Curve B represents the light distribution curve generated by a point moving along a path of constant intensity. Curve C indicates a corresponding curve from a conventional and standard lens type lamp structure, that is, one wherein the forward end of the lamp structure mounts or receives a lens. Curve D is a corresponding curve of the lamp structure and lamp bulb illustrated in Fig. l. It will be noted that the area of this curve is relatively wider than curve C and that it is slightly shorter in axial length than curve C but not appreciably so.

In other words, the lens type lamp structures will provide more intensive local illumination while the present invention will provide less intensive illumination but not appreciably so compared to the lens type lamp structure but will illuminate a greater area. For example, if the lamp structure be used as a bed lamp, the lens type lampsee curve C-will provide illumination of a width sucient to read a magazine, such as the Saturday Evening Post, Ladies Home Journal, or the like. However, if the reader shifts his position but slightly, only a part of said magazine will be illuminated so that the reader is confined to one set position in the bed when reading under the lens type lamp. With the present invention as represented by curve D, the reader may shift his position and still have ample illumination for reading magazines of the aforesaid type.

There is a further advantage inherent in the present invention, and that is that when it is desired to read a newspaper in bed, only a part of said page will be illuminated by a lens type lamp structure. With the present inventionsee curve D-the entire page of the newspaper will be suiciently illuminated for reading purposes.

Physiologically, the present invention has an75 additional advantage. The lens type lamp, generally speaking, is of the so-called focusing type and the intensified light therefrom usually produces a maximum glare effect on the page being read. The present invention in contradistinction thereto produces what may be termed a softer light and not of intensified character and in reality more light, as will be obvious from a comparison of curves C and D see Fig. 4. If curve C be rotated, it will generate a volume which is proportional to the area of said curve. The same also applies with respect to curve D. While the light source A is the same in both instances, and while C is slightly larger or longer axially-see bottom portion of Fig. 4-it will be observed that at each side of curve C, curve D is spaced therefrom an appreciable distance. It may be said that at each side there is an area defined by the intersection of curves C and D which are substantially twice the area between curves C and D at the bottom of said curves, referring to Fig. 4. In other words, the effective area difference between curves C and D is approximately three times, this being the differi ence between twice the areas of the side less the forward area. In other words, the present invention is more effective in providing more light for reading purposes and of less intensified character and of wider distribution than a lens type lamp.

Mechanically, the present invention has a decided advantage over the lens type lamp. With the lens type lamp it is essential that the lamp be opened by disconnecting two portions of the shell structure thereof or by removing the lens thereof in order to insert, remove and replace light bulbs therein. With the present invention, no such disassociation is required. There is a suflicient portion of the light bulb exposed beyond the cylindrical portion 25 so that the fingers may readily engage the light bulb and back out the burned out bulb and another bulb may be readily replaced.

Should the objection be raised that the wide dispersion of light is objectionable for reading purposes when the bed is occupied by two persons, one desiring to read and the other desiring to sleep, it is pointed out that the support for the lamp structure is of readily adjustable character and the lamp itself may be readily directed to one side or the other of the bed so that the reading occupant thereof may read with ease and the sleeping occupant thereof may sleep without disturbance or without annoyance from the light.A

The support for this lamp structure also permits the lamp to be used for illuminating a clock or the like, since the shell is readily adjustable relative to the support mechanism, it being understood from an examination of Fig. 4, that there is sufficient illumination for such purpose, in view of the fact that curves C and D do not have such a radical departure along the central axis indicated at E.

Reference now will be had to Figs. 1 to 3, inclusive, wherein the support structure and its connection to the lamp structure proper is illustrated. The aforesaid support structure is of such character it may be readily mounted on a wall adjacent a bed, on the head of a bed, on the foot of the bed, for a physicians observation of a patient, on a vanity, table desk or the like, wherever a local area is desired to be more highly ilhuninated than that provided by the` general illumination of the room in which the person or object is located.

Herein the numeral 30 indicates a substantially U-shaped metal strap which is of flexible steel type and which may be forcibly deformed, as required. Herein one leg, as indicated at3l, is clirected inwardly and slightly arched so that the two adjacent ends while spaced apart are spaced closerl to each other than the portions adjacent the curved connecting portion.

Approximately midway in the other arm of the U-shaped strap 33, there is provided an aperture 32 and seated therein is a rivet, or the like, 33 which'- extends outwardly therefrom and mounts a exible washer 34 which bears upon the midportion 35 of a U-shaped member 36 and having its midporton apertured as at 31. 'I'he rivet is headed, as shown, and thus this U-shaped member is rigidly anchored, as it were, to the metal strap, yet is capable of rotation relative thereto about the rivet 33 as an axis.

Another U-shaped strap has a central ,portion 38 and two arm portions 33. The arm portions 39 herein are shown straddling the arm portions 3B. The arm portions 35 are spaced apart by a tubular member or sleeve 40. Extending therethrough and through apertures 4I in the -arms 36 and apertures 42 in the arm 39 is the rivet 43. Thus, the two U-shaped members last mentioned, are capable of rotational movement relative to each other about the axis of rivet 43, which axis is transverse to the axis of the rivet 33. Thus, a universal joint type of connection is provided which is of relatively simple character.

The midporton 38 of the second mentioned U -shaped member of the universal joint construction is rigidly secured to the lamp casing as by riveting, or the like, the lamp casing or shell being apertured as at d and the central -portion 38 being apertured as at 45,*the rivet or like connector being indicated by numeral 46.

While this is intended to be a rigid and xed connection due to the fact that the universal connection is interposed between the lamp shell and the U-shaped support member, such rigidity may not be maintained so that preferably the lamp casing is offset or indented, and herein inwardly, as indicated at 4l to nestingly receive the midportion 38 of one of the U-shaped members of the universal joint construction. Thus, the lamp shell has interlocking connection with the universal joint member immediately associated with said shell and thus no rotational strains at this connection are transferred to the rivet and the parts immediately adjacent thereto which are connected together thereby, .but `are absorbed by the nesting of this member in the lamp shell recess or socket type depression. The departure from the general conformation of the remainder of the portion I6 by the indenting or socket formation 41 is quite slight s0 that there will be little or no modication of curve D, see Fig. 4, resulting therefrom.

To prevent marring of the supporting surface and -to increase the frictional gripping of such supporting surface or frictional contact with the wall if the lamp be used in a suspended relation, there is provided a rubber-like covering `lili which, as indicated i covers and conceals the head portion 33a of rivet 33. It is extended as at 52 beyond the end of the arm of the U-shaped support which mounts the universal joint connection. In a likemanner, it is extended as at 53 beyond the other end of said U-shaped support.

Adjacent the other end of the vU-shaped support the strap portion 3| is apertured as at 54- see particularly Figs. 1 and v3'. covering or sheath is provided with registering slits 55. Thus, the edges of this aperture of the metal strap are normally substantially covered.

When the device is to be suspended on a hook,l nail or the like, it will be apparent the rubberlike covering will readily yield to permit the passage of the head of the supporting member,

IWhether it be a nail, a picture hook, or other support member,

v When the device is to be used and clampingly supported, the portion of the supporting object is inserted between the two arms of the U-shaped support member.

It will be obvious that inasmuch as the free ends of this arm are protected by the rubber covering, there will be no marring of such support members, such as the head of the bed, edge of the vanity, or a desk, or the like, and neither will the surface thereof be marred by the rivet head 33a. l

It will be noted also that the spring or flexible washer 34 bears on the midporton 35 of one of the universal joint members and the latter bears on the rubber covering 50. This together with the tension effect of the spring washer permits swivelling of the two U-shaped members on the rivet 33 but prevents free swinging thereof, sov that when the adjustment has been made, as desired, it will be maintained and all without requiring supplemental clamping action as is customary in many so-called universal joint constructions utilized in lamp mounting structures.

In Fig. 5 there is illustrated the preferred form of universal joint-su-pport connection. Numerals of the one hundred series indicate like or similar parts. Herein the flexible washer directly ycontacts the metal strap. This insures proper connection even if the rubber should deteriorate and fail in the form shown in Fig. 1. Also both sides of the covering are relieved as illustrated.

Another advantage of the present invention over the lens type construction is that, in certain lens type lamp structures, the beam concentrating. element, to-wit, the lens, projects beyond the lamp housing so that it is almost equivalent to looking at a bare intensified bulb. As shown clearly in Fig. 1, this is almost impossible because in this instance, the bulb is recessed in the housing, and does not project materially beyond the forward plane.

The present invention has another functional advantage over the lens type lamp structure which is of considerable practical importance. The lens type lamp structure usually retains the bulb generated heat so that it becomes quite hot and thus cannot be handled for adjustment without discomfort or burning unless adequate provision isv made for ventilation. With the present invention, due to the fact that the bulb is not fully enclosed and there is an annular channel between the collar or cylindrical portion 25 and the lamp bulb, the air in the bowl `or shell, which is heated incident to use of the lamp by illuminating the bulb, escapes from the bowl and lis replaced by cooler air. The cool-er air enters the bowl at the lower portion of the annular channel mentioned, and the heated air escapes from the upper portion of said channel, so that the shell is relatively cooler andmay be readilyy handled for lamp adjustment and turning off the light without discomfort or burning.

The openings for heat ventilation permit the accumulation of dirt within the lens type shell.

The rubber-like Not only must the bulb be removed for cleaning shell interior (and this is common to the present invention) but the lens must be removed or the shell interior otherwise exposed.

It is further set forth that by reason of the porcelain-like coating and the shape of the reentrant portions 24-25 and the inward curvature, as it were, of the portion I9, that all rays of light not projected directly through the opening from the lamp bulb are caused to be reiiected backward, et cetera, within the bowl or shell until ultimately they pass from the same in the manner indicated in Fig. 4. The resultant effect on the eye is that the entire interior-of the lamp structure is highly illuminated and the contrast between the energized light bulb and the interior of the lamp structure is minimized which removes the well known objectionable contrast common to concentrated light sources and adjacent surfacesl when directly viewed.

It is further set forth this flexible split strap 3| may be forcibly deformed and retain such formation without destroying its normal resilient character. In other words, if the U-shaped support is to engage a support member of 21/2 or .3 in width, the free arm of the U-shaped member is grasped and a larger bend is formed therein, which thereupon spaces the apertured arm of the strap farther from the universal joint supporting arm thereof, all without, as stated, destroying the inherent resiliency of the clamp type mounting.

It will be obvious, of course, the rubberlike material accordingly will be` deformed and yet will function in exactly the saine manner, no

matter to what position any portion of the U- shaped mounting is deformed.

It will be also apparent from the foregoing that the resulting structure is of exceedingly simple character, includes a minimum number of parts and these of readily fabricated character and easily assembled, as compared with the ordinary lens type lamp structure and with the further advantage that the present invention does not require the use cf a lens, thus saving this c ost and such replacement costs as are inherent to the breakage of a lens type lamp structure, for without a lens the lens type lens structure will not function as intended.

`In Figs. 6 and 7 of the drawings there is illustrated, another modified form of the invention and this departs in two respects from that shown more particularly in Fig. l. Numerals of the series indicate like or comparable parts in Figs. 6 and 7. One departure is that the portion 2|1 of the shell 2l6 is radially slit, as at 2|8, and one part is offset relatively to the other. The bulb socket structure Zi is shown provided with a thread arrangement 2|2a, this being a standard type of bulb circuit. By reason of the slight offsetting, the portion 2|1 split at Zit constitutes a thread portion so that the socket may be threadedly positioned, mounted and retained in the globe structure substantially as shown in Fig. 6.

In the lower portion of Fig. 6 and in Fig. 1 the base 231] is shown triangular in form and is provided with a teardrop shaped opening 255 so that may engage the shank of a nail, the enlarged portion of -said opening permitting the head to pass therethrough and thus suspendingly support the base of the combination unit. The unit is prevented from slipping from said nail because the shank portion of the nail seats in the reduced portion of the opening 255. The base 230 is connected to the globe in substantially the same manner as the globe shown in Fig. 1 is connected to the U-shaped hanger type support.

In Fig. 8, there is illustrated a further modified form of base structure `and numerals of the 3BE) series indicate like or comparable parts. In this form of the invention, the base 330 is shown as of receptacle receiving type. It is extended as at 33| and terminates in an inwardly and upwardly directed bead arrangement 353. While herein this base structure is shown of circular outline, it is to be understood that it may be polygonal as well. Within the chamber A formed in this base structure 339 may be seated a cosmetic case 310. This cosmetic case is detachable or removable from said chamber A. Herein the retaining arrangement is illustrated as a mirror structure, the body portion of the mirror being indicated by the numeral 31| and the reflecting surface being directed inwardly so that it is protected from supporting surface engagement.

The back of the mirror 31| mounts a support 312 in which is pivotally mounted the mid-portion of a U-shaped easel support 313, the free ends thereof extending laterally and outwardly, for example, as indicated at 314 and as shown more fully with reference to a subsequent form of the invention, it later being illustrated in Fig. il to which reference is had hereinafter.

It is suiiicient to state here that this mirror structure is so arranged that by manipulation of the easel support, it may be readily freed from the chamber A, thereby permitting removal of the cosmetic case and removal of the mirror so that the mirror may be elevated in easel arrangement, cosmetic case opened and the lamp utilized for customary make-up purposes. Following that, the cosmetic container, or case, 310 may be replaced within the chamber A, which is then closed.

Reference will now be had to Figs. 9 to ll inclusive, wherein numerals of the 400 series indicate like or comparable parts. This form of the invention is an embodiment of an elevated or student type lamp structure. Portion 43il is an upwardly curved directed arm arrangement, highly ornamental in character which terminates in a scroll end 43M, as it were, cr similar forniation, and to-wit: in the manner previously described, there is secured the globe structure with which is associated the lamp socket and the lamp.

The lower end of the member 430 is extended laterally as indicated as at 453 and is secured as at 454 to a container portion 48| in the main base portion. This main base portion 48| is laterally enlarged as at 48|) and is provided with an inwardly and upwardly directed rim arrangement 482. The upper chamber formed by portion 43| is adapted to receive a powder puff 41D or cosmetic container. The lower chamber, formed by the portion 480, is adapted to receive the mirror arrangement 41| provided with the eas'el arrangement 413-414 hingedly secured to the back of the mirror as at 412. This mirror serves to retain cosmetic container or powder puff 410 in the upper and communicating chamber.

It will be noted, see Fig. 11, that upon the two arms 413 being moved to the dotted line position the portions 414 overlie each other and just clear the inner edge of the inwardly .directed portion 482 and in that manner, the easel type support constitutes a yielding lock for yieldingly holding` a. mirror in the chamber in the base, it being Vtion 593 of a retainer. laterally of the pivot portion as at 594 and vterminates in a spring loop 595 having an ex- .tended end portion 595.

understood that this engagement of the portions lllll with the adjacent side walls 480 serves to maintain the opposite end of the mirror in engagement with the adjacent side wall 480 and in overlying relation relative to the inwardly directed portion 482. When the mirror is removed,

'the powder puff or container may be removed.

In Fig. 12, there is illustrated a further modifled form of bowl support. It, also, is of chamber type. Herein, however, in Fig. 12, the bowl portion and its immediate connecting means is intentionally omitted for clearness. This base structure 530 supports the U-shaped member having the wings 539, and is provided with an vinwardly and upwardly directed rim arrangement or bead 582. Herein there is riveted, as at 59|, two ears 590, each of which has a curled portion 592 forming a pivot for'the pintle por- 'I'he latter is extended This entire spring arm construction may be dipped in rubber or rubber covered in substantially the same manner that the U-shaped support or base 3B of Fig. l is rubber covered. However, for clearness herein the rubber covering is intentionally omitted.

In Fig. 12, B indicates the top of a bed. In other words, a foot board or a head board and the full lines show how the clamping members previously described may be moved from the dotted line nested position to the full line position and mounted in clamped relation on said member B, the clamp being effected through the portions 596 and the beaded or rimmed edge r It will also be apparent that within the offset portion 58l may be mounted a cosmetic container such as shown in Figs. 8 and 10. Furthermore, if desired, a mirror structure also shown in said figures, may also be nested within the base structure and be retained by the beaded rim 582. In this event, of course, the former container might be positioned forwardly of the nested clamping arm structures and then the mirror structure would be positioned so that its curled free ends of the easel support would seat within the beaded rim immediately adjacent the members 590.

While the invention has been illustrated and .described in great detail in the drawings and foregoing description, the same is to be consideredj as illustrative and not restrictive in character.

The several modifications described herein as well as others which will readily suggest themselves to persons skilled in this art, all are considered to be within the broad scope of the invention, reference being had to the appended claims.

The invention claimed is:

1. In a lensless lamp structure, the combination of a frusto-spherical bowl casing having a lamp socket mounting annular portion at the bowl rear end coaxial with the casing axis, the forward portion of the casing being the frustoportion and the casing axis being perpendicular to the frontal plane defining the frusto-po-rtio-n of the casing, the forward and bulb receiving opening of the socket being positionable forwardly of the rear of the casing, an inwardly and rearwardly directed frontal annular portion on the front end of the casing and of just sufficient diameter to permit a substantially spherical lamp bulb to pass therethrough, the bulb when socket seated having its axis coincident with the .aligned axes of the annular portionsand its forward extremity projecting forwardly .of the innermost extremity of the frontal annular portion and terminating substantially coincident with the aforesaid frontal plane, the bulb when socket seated occupying the central portion of the interior of the casing and having a radius of an order at least half that of the radius of the casing, and, being annularly and inwardly spaced from the inner annular edge of the frontalY annular portion to form an annular heat ventilating and light transmitting passage therebetween, the interior surface of the bowl casing being' of light reflecting and diffusing character,

2- In a lensless lamp structure, the combination of a frusto-spherical bowl casing having a lamp socket mounting annular portion at the bowl rear end coaxial with the casing axis, the forward portion of the casing being the frustoportion and the casing axis being perpendicular to the frontal plane defining the frusto-portion of the casing, the forward and bulb receiving opening of the socket being positionable forwardly of the rear of the casing, an inwardly and vrearwardly directed frontal annular portion on the front end of the casing and of just sufficient vdiameter to permit a substantially spherical lamp bulb to pass therethrough, the bulb when socket seated having its axis coincident with the aligned axes of the annular portions and its forward extremity projecting forwardly of the innermost extremity of the frontal annular portion and terminating substantially coincident with the aforesaid frontal plane, the bulb when socket seated occupying the central portion of the interior of the casing and having a radius of an order at least half that of the radius of the casing, and being annularly and inwardly spaced from the inner annular edge of the frontal annular portion to form an annular heat Ventilating and light transmitting passage therebetween, the interior surface of the bowl casing beingr of light reflecting and diffusing character the frontal annular portion of the bowl casing being of frustoconical character and interio-rly terminating in a rearwardly directed cylindrical extension of an internal diameter but slightly larger than that of the bulb.

3. In a lensless lamp structure, the combination of a frusto-spherical bowl casing having a lamp socket mounting annular portion at the bowl rear and coaxial with the casing axis, the forward portion of the casing being the frustoportion and the casing axis being perpendicular to the frontal plane defining the frusto-portion of the casing, the forward and bulb receiving opening of the socket being positonable forwardly of the rear of the casing, an inwardly and rearwardly directed frontal annular portion on the front end of the casing and of just sufficient diameter to permit a substantially spherical lamp bulb to pass therethrough, the bulb when socket seated having its axis coincident with the aligned axes of the annular portions and its forward extremity projecting forwardly of the innermost extremity of the frontal annular portion and terminating substantially coincident with the aforesaid frontal plane, the bulb when socket seated occupying the central portion of the interior of the casing and having a radius of an order at least half that of the radius o-f the casing, and being annularly and inwardly spaced from the inner annular edge of the frontal annular portion to form an annular heat ventilating and light transmitting passage therebetween,

the interior surface of the bowl casing being ofV light reflecting and diffusing character a support member, the bowl casing having a depressed socket portion therein, an external connection between the support member and casing and having a protruding portion conforming to the shape of the depressed socket portion and seatable in the depressed socket portion, and means rigidly and nonrotatingly securing the casing and protruding portion together.

4. In a lensless lamp structure, the combination of a frusto-spherical bowl casing having' a lamp socket mounting annular portion at the bowl rear end coaxial with the casing axis, the forward portion of the casing being the frusto-portion and the casing axis being perpendicular to the frontal plane dening the frusto-portion of the casing, the forward and bulb receiving opening of the socket being positionable forwardly of the rear of the casing, an inwardly and rearwardly directed frontal annular portion o-n the front end of the casing and of just sufcient diameter to permit a substantially spherical lamp bulb to pass therethrough, the bulb when socket seated having its axis coincident with the aligned axes of the annular portions and its forward extremity projecting forwardly of the innermost extremity of the frontal annular portion and terminating substantially coincident with the aforesaid frontal plane, the bulb when socket seated occupying the central portion of the interior of the casing and having a radius of an order at least half that of the radius of the casing, and being annularly and inwardly spaced from the inner annular edge of the frontal annular portion to form an annular heat Ventilating and light transmitting passage therebetween, the interior surface of the bowl casing being cf light reflecting and diffusing character a support member, the bowl casing having a depressed socket portion therein, an external connection between the support member and casing and having a protruding portion conforming to the shape of the depressed socket portion and seatable in the depressed socket portion, and means rigidly and nonrotatingly securing the casing and protruding portion together, each of the latter being apertured, the apertures registering when seating association is effected, and said means extending through the apertures for rigid connection purposes.

JAMES H. REICHART.

Images