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Oct. 15, 1946. w. TRAUTNER 2,409,403 'VEHI CLE S IGNAL Filed May 11, 1943 > 2 Sheets-Sheet l INVENTOR. BY ‘ Oct. 15, 1946. w. TRAUTNER 2,409,403 VEHI CLE S IGNAL Filed May 11, 1945 r 2 Sheets-Sheet 2 WW Emma?“ BY ‘ Patented Oct. 15, 1946 2,409,403 UNITED STATES PATENT OFFICE 2,409,403 VEHICLE SIGNAL Wagn Trautner, Hamilton, Ohio, assignor‘ to The K-D Lamp Company, Cincinnati, Ohio, a cor-. notation of Ohio Application May 11, 1943, Serial No. 486,537 2 Claims. (Cl. 240-41) 1 2 My invention relates to signal lamps 0r lights especially for heavy-duty vehicles. These sig nals may be of full illuminating intensity for Figure 1 is a front elevational view of an ex ordinary use, or they may be or “blackout” con struction as hereinafter described in certain em bodiments. For military use, on tanks, trucks and other emplary vehicle tail signal. Figure 2 is a vertical section thereof. Figure 3 is a sectional view of a can for an~ other type of stop signal or taillight. Figure 4 is ‘an elevational view of one type of incandescent bulb with a mounting ?xture heavy duty vehicles, it has been found best to thereon. . provide a sealed construction. This means that Figure 5 is an end elevation of the structure . for each incandescent bulb a can is provided. At 10 shown in Figure 4, one end of the can there is a sealed closure em Figure 6 is a side view of another type of in bodying a lens or transluscent cover (and in candescent bulb with a mounting ?xture in place blackout constructions, certain ?lters and masks thereon. as well). The bulb proper is located within the Figure 7 is an end View of ‘a structure shown can, with its base projecting through aperio 15 in Figure 6. ration in the can‘ end remote from the lens. The Figure 8 is a perspective view of a can from base is soldered or brazed to the can, thus pro the rear. > viding a sealed construction whichobviates much Referring ?rst to Figures 1 and 2, wherein I of the difficulties arising from dust, mud and have shown an exemplary signal device for the water in this part of the apparatus. In most 20 rear of a tank, truck or other vehicle, l repre tail-signal assemblies two or more of these cans sents a cup-shaped body, having a cooperating are located in a housing which contains the cover member, 2. At the back or bottom of the sockets for the bulb bases, and which has a cover housing I, there is a stamping 3, shaped as shown, with perforations or cutouts to disclose‘ the lenses, and fastened to the bottom in any suitable way. or desired portions thereof. A pair of socket members, 4 and 5. extend through An obvious disadvantage of ‘the sealed can. con_ perforations in the bottom of the housing I, and struction is that when a bulb burns out Or breaks in the‘ stamping 3, and may be held in place in the whole can must be discarded and another any suitable fashion. I have shown peripheral one provided. This means that the changing of ribs ‘6, about mid-way of the length of the socket of a bulb involves the changing of attendant 30 tubes, with these ribs engaging and held tightly parts which may and in most instances do cost between the bottom of the housing I, and ‘the more than the bulb. This is uneconomical. Also, stamping 3. A mounting belt, or other means by the maintenance of a reserve supply of bulbs which the signal may be attached to a vehicle, is means the maintenance of a reserve supply of, shown at ‘I. It will be understood thatfor'mo'unt complete cans, involving problems of bulk, weight 35 ing purposes, a suitable bracket may be employed and space. and may have provision for angular adjustment An object of my invention is the provision of of the signal structure. a structure in which every advantage of the Within the housing I, I have shown a pair sealed can is realized, but in which bulbs may of cans, 8 and 9, the general shape of which may be replaced without the necessity of replacing 40 be anything appropriate to the particular ser the combination of can, seal, lens, ?lter and vice which the signal device is to perform. A mask. ‘ common shape for a stop and tail-signal device Another object of my invention is the provi is generally shown in Figure 8. Hitherto, as al sion of a structure such as the one hereinabove ready indicated, it-ha's been the practice ‘to place characterized, in which certain advantages of 45 incandescent bulbs. in these cans with their bases orientation may be obtained, hitherto imper extending through perforations in and ‘soldered fectly obtainable, or not obtainable at all. to the can bottoms. My improvement in this These, and other objects of my invention which structure will hereinafter be outlined. will be set forth hereinafter or will be apparent At the other end of the cans there is a sealed to one skilled in the art upon reading these 50 light emitting structure. The can end is flanged or turned outwardly as at In. For blackout pur speci?cations, I accomplish by that certain con poses the light emitting structure may comprise struction and arrangement of parts of which I several parts. First, there may be a front lens shall now describe the aforesaid exemplary em or translucent element indicated at II. Behind bodiments. Reference is made to the drawings this there may be a cup-shaped member I2, hav forming part hereof and in which: 2,409,403 3 4 ing a peripheral ?ange l3. The cup-shaped mem ber I2, is usually made of a tinted translucent but this is not usually necessary. The point of the protuberance 26 is the giving of a tactile indi cation whereby the cover may be readily applied material, so that it may act as a ?lter, or, if desired, a separate ?lter may be employed. In in the proper orientation, so that the screw holes in which screws 24 and 25 engage may be readily located by the operator, and so that where the interengagement of lens protuberances and per the speci?c exemplary embodiment, those por tions of the member l2 through which light is to pass are recessed, as at, I 4. Then, in the process of further manufacture, protective structures are placed in these recesses, and the remainder of the hollow interior of the member 12 is sprayed with some opaque coating substance, usually the construction, such interengagement may be readily obtained. It will, of course, be understood black in color. The recesses M are left uncoated by this operation. The black coating serves as a mask and renders unnecessary the use of sepa tain suitable connector plugs. These have not been illustrated; but the sockets, as in Figure 2, show locking notches for these connector mem forations in the cover member is a feature of that the socket members 4 and 5 will in use con rate mask plates and the like, though these may 15 bers. be employed if desired. The general disadvantages of passing the lamp In the formation of a sealed structure, an an bases through holes in the can bottoms and sol nular sealing ring I5, U-shaped in cross-section dering the bases to the bottoms have been pointed and made of rubber or any other suitable sealing out above. There are also other disadvantages. substance is placed on the ?ange I3 of the mem 20 One of these is the difficulty of securing proper ber I2. This sealing ring rests on the ?ange ll} orientation of the bulbs in the cans. In general, two conditions give rise to a need for orienta of the can 3, and the lens II, in turn, rests on the sealing ring [5. A collar [6, having an in tion. Certain tail signals require double ?lament turned ?ange at one side is slipped over this bulbs which have, in addition to a base sleeve, assembly, and a ?ange is rolled or turned over two end contact members. The need for orienta at its other side, so as to form a structure in which tion here is obvious; but it is also relatively easy one of the ?anges rests against the lens H, and to obtain, because the contact points on the base the other engages the ?ange E0 of the can, clamp are outside the can and give visual indication of ing these elements together sufficiently tightly to form a seal. - ' 1 orientation during assembly. But in heavy-duty 30 vehicles subject to much jarring and jolting it It will be understood that the structure just described may be varied to suit the nature of the service which the signaling device is to perform. has been found that the orientation of the incan descent ?laments in illuminating bulbs has a pro nounced effect on bulb life where the bulbs are Figures 1 and 2 illustrate a blackout structure, ' horizontally disposed. A vertical disposition of the ?laments is frequently conducive to shorting, whereby the bulbs burn out; and it has been found that the life expectancy of bulbs is greatly pro longed by disposing the ?laments in a horizontal comprising a blackout stop signal which will be intermittent in its action, and a blackout tail signal. However, for stop, directional or tail sig nals or other signal uses requiring full intensity position. Where bulbs are inserted in and their of the illumination, mask structures and the like may be eliminated. In Figure 3 I have shown a 40 bases soldered to cans, such orientation is ex Fresnel prism lens H, which may or may not be tremely di?icult to obtain, for the reason that tinted. In this structure the lens merely lies the bulb is located inside the can and away from against a sealing ring l8, which, in turn, lies against the can ?ange it, while the collar struc ture l6 clamps the “parts together in the way hereinabove described. In blackout structures, where the angle of illu mination is important either to prevent the lights easy observation, while the desired orientation, even if initially obtained, can be destroyed by slight rotation of the bulb. In the practice of my invention I not only provide a sealed structure from which the bulbs can be individually removed and in which they may be replaced, but I also make provision for obtaining the desired orienta from being seen from the air or to provide a visual indication of the angle at which the vehicle is ' tion structurally and in operation. being observed, less than the full area of the front In the end of the can 8 of Figure 8, I provide lens H is normally utilized. Where this is the a perforation large enough to accept, not the base of the bulb, but the enlarged glass portion. ‘case, the utilizable portion of the front lens is generally brought outwardly, as at l9 (Figure 2). The edges of this perforation are preferably in The cover member 2 is a cup-shaped member 55 wardly turned, as at 21. Also about the periphery which in the case of blackout signals usually will of the perforation and spaced from the edge of be formed with depressions 20 and 2! in it over substantially the areas of the can ends. The de pressed portions 20 and 2| will then have cutouts 22 and 23 in them to disclose the lenses as shown, or more restricted cutouts to disclose the pro tuberances l9 on the lenses of the cans. When the cans are placed in position with the bases of the bulbs in the sockets 4 and 5, they are clamped in position by means of the cover 2 which, in turn, is held in place by screws 24 and 25, threading into brackets (not shown) attached to the hous ing I. Under the pressure exerted by the screws, the depressed portions 20 and 2| of the cover 2 engage the can ends and push them to the rear. As an aid to assembly under conditions of dark ness, I prefer to provide my cover with an orient ing protuberance or rib 26 at one side. The hous it, I prefer to provide an annular bead or depres sion 28. Also, at one point on the edge of the perforation, I prefer to provide an orienting notch 29. This, of course, could be a protuberance and still function in the manner hereinafter set forth; but in the usual procedure of turning inwardly the edges of the can bottom about the perfora tion therein to form the ?ange 21, it is more con venient to form the orienting con?guration 29 as a further depression. The base of the bulb is soldered or otherwise sealed to a ?xture 39. This will hereinafter be more fully described. It has a part shaped to enter the perforation in the can bottom and an ing I may be provided with a mating protuber outlying ?ange between which and the can bot tom there will be located a sealing ring 3|. When the cans are assembled in the signal structure, and the cover 2 is tightened up as hereinbefore ance, enforcing a proper positioning of the cover; described, it will be evident that the ?xtures 30 2,409,403 5 . 6 initely. For heavy-duty vehicles the lenses, ?l Where a large bulb is required, it may frequently be necessary to clecenter the bulb with respect to the ?xture. This is illustrated in Figures 4 and 5, where the ?xture 3lJ—a designed to accept the base ill of the bulb 4D has the cylindrical part 32--a, and a similar con?guration of the inturned parts, excepting that the perforation which ac cepts the‘base 4| is decentered, as shown. Other ters and the like are usually made of translucent wise the structure is the same, except for a neces and the sealing rings 3| effectively seal the can ends. Yet when the cans are removed from the signal structure, the bulbs and their ?xtures may be readily removed, and new ones placed in the same cans. For bulb replacement there need only be stocked a set of bulbs and ?xtures, since the cans are capable of remaining in service indef plastic not subject to breakage. Figures 6 and '7 illustrate one type of bulb and ?xture assembly. The ?xture itself is a stamp ing 30, having a short cylindrical body 32, at one end of which is the annular ?ange 33. At the other end of the body 32, there is an inturned part 34, providing a hole to accept the base 35 of the bulb. The inner end of the part 34 is slightly outwardly turned, as at 36. This has two purposes. For one thing, it provides a channel in which solder may be located, as at 31, and, by dis posing the metal edge of the ?xture somewhat outwardly from the base of the lamp itself, it insures that the ?xture will be contacted by the ends of the sockets 4 or 5, when the signaling structure is clamped together. This will be clear 25 in Figure 2; and it provides positive abutting sarily enlarged size of the ?xture 3|l——a. In Figure 5 I have shown the base 4| as having two contact points 42 and 43. The orientation of these points with respect to the orienting pro tuberances 38 during the operation of soldering will be clear from the description which has gone before. Orientation is factilitated because the bulbs and ?laments can at all times be readily observed. ' Modi?cations maybe made in my invention without departing from the spirit of it. Having thus described my invention in certain exemplary embodiments, what I claim as new and desire to secure by Letters Patent is: 1. In an illuminating device, a can, a lens hav ing a sealed relationship with one end of the can, the other end of the can being closed except for a contact without undue precision in the parts. At one side of the cylindrical portion 32, as perforation in said end, said perforation being of held by the pins in a soldering machine. The bulb base 35 is inserted in the ?xture, ‘as will be clear from Figure 6, and the ?xture is then placed in bulb within said can, and the parts held together by pressure exerted respectively on the can and the ?xture, the edges of said can end being in turned about said perforation to form a substan tially cylindrical recess, said ?xture having a cylindrical portion ?tting in said recess, and an a size to accept the bulb of an incandescent lamp, an incandescent lamp having a bulb and base, best seen in Figure 7, I form an orienting protub erance 38, which co-acts with the orienting groove 30 and a ?xture on said base and sealed thereto, said ?xture having a portion for co-acting with said 29 in the perforation in the can body. The ?xture can to effect a sealed connection when said ?x may be provided with certain peripheralnotches ture and lamp are in place on said can with the 39 in the ?ange 33, so that the ?xture may be the soldering machine. The bulb ?lament or ?lament can be exactly oriented with respect to the protuberance 38. Solder and flux may be placed in the channel, as at 31, and the soldering 40 outlying peripheral ?ange substantially paral leling the can end, the walls of said cylindrical machine, by applying heat to the flange 33, will recess having a groove, and the cylindrical part cause the solder and flux to be melted (through of said ?xture having a mating ridge, the walls of ‘ heat conduction in the body of the ?xture) to the said cylindrical portion of the ?xture being effect the necessary seal between the bulb base and the ?xture. When the solder has set, the 45 inturned at one end to provide a recess for the ac ceptance of the base of said lamp, and then bulb and ?xture can be removed from the solder slightly outturned to provide about said base a ing machine, and after cooling, the sealing ring groove for sealing substance and an abutment 3| may be applied to and cemented against the whereby pressure may be exerted on said ?xture ?xture ?ange 33. The ring 3| may be of rubber or similar material but can be constructed of such 50 by a socket in which said base is placed. 2. The structure claimed in claim 1 in combina substances as asphalted felt or the like. tion with a housing including a body and a cover, As indicated, the hole in the can bottom, and a socket in said body, means on the cover for by consequence the cylindrical portion 32 of the engaging the can, and means for drawing the ?xture, must be somewhat larger than the diam eter of the bulb employed. In some types 55 cover to the body whereby to clamp the ?xture against the can by means of said socket. of signaling structures the bulb base cannot be WAGN TRAUTNER. centered in the direction of the width of the can.