US 1697803 A
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AUTOMOBILE SIGNAL LAMP Filed June 19, 1925 ATTORNEY Patented aan, i, rezav nuiTs sTaTss TaTenT @Trice ROSCOE BERINGE, OIE DETROIT,
MICHIGAN, ASSIGNOR 'IO GENERAL MOTORS COR- AUTOMOBILE SIGNAL LAMP.
Application mea June 1a, 1925-'. :iseriai No. 38,245.
My invention relates to lamps such as are used at the rear ends of motor driven vehicles as signals to drivers of other vehicles, and particularly to lamps of the type or class wherein a red signal is displayed and the license plate of the vehicle is illuminatedby one electric lamp, which is com`- monly lit all the time; wherein 'a stop signal having that word or other device is displayed, as by causing light rays 'from another lamp to shine through a transparent plate rpon which the stop or other signal is impressed in opaque characters, when the vspeed of the vehicle is substantially reduced or when a turn is to be made;
and wherein a third lamp is caused to shine.
through a transparent lens when the vehicle is to be driven backward. The lamp whereby the red tail lamp is displayed and the .license plate illuminated is commonly lit all the time at night, whereas the stop and backing signals are displayed only when the speed of the vehicle is reduced below a predetermined rate, and when the vehicle 1s to be backed. v,This as a matter of course contemplates the use of suitable switching mechanism with thel lamp per se wherein' my invention consists which mechanism,
however, isnot disclosed herein, as it formsY no part of the invention to which this present application relates.
My invention as suggested relates to lamps of the general type'above described; and the object thereof is to provide an improved lamp structure of that type. which will be materially simpler, and cheaper to manufacture, than has heretofore been the case; as such lamps have heretofore been of quite complicated and intricate constructions, have been costly to manufacture, and have been liable to get out of' order when in use.
VV-ith the above and other objects of invention in view my invention consists in the improved lamp structure illustrated in the accompanying drawing, described in the following specification, and specifically claimed and modifications thereof, within the scope 0f ,the concluding claims, as will be obvious to those skilled in the art to which my invention relates. l
In the drawing accompanying and forming a part of this specification and wherein the preferred form of my invention is illustrated:
Figure l is a view showing my improved lamp structure in elevation, and as seen from a position to the rear thereof,
Figure 2 is a view showing a section thereof upon a horizontal plane indicated by the line 22, Figure l, l
F1gu're3 is a View showing a section upon a vertical plane transverse to the lamp structure,- and indicated by the line 3 3, Figure '2,
Figure-4 is a fragmentary view showing a section upon a plane indicated by the line H, Figure 3, Figure 5 is a fragmentary view showing a section upon a plane indicated by the line 5-5, Figure 1. i
Referring now to the drawing, the reference numeral 6 designates the main external shell or casing of my improved lamp structure, the same being made from thinl sheet metal bent and shaped to' impart the proper'form thereto, as by the use of suitable dies; the casing being a hollow oblong structure open along one side which is rearward when the lamp is in use, 'so that the three 2 and said'shell is provided with. an opening l 8 arranged opposite the open side Zvthrough Y which the tubular part or neclrof a bracket whereby the lampis supported extends, and with an opening at 9 in its lower wall through which light from within the casing shines to illuminate the usual license plate carried by the vehicle with which the lamp is used.
The casing ,6 is suppord from a suitable support (not shown) by a bracket comprising a substantially rectangular base portion l0 lying within the casing and secured thereto as by four screws 11, and a tubular neck portion l2 disposed at right angles to said base and extending through the opening 8 in the casing and far 'enough to provide a suliciently hrm support for the lamp; thebase having op ositely disposed vertically extending side anges 13, and the lower edge thereof being recessed at M to preiice vide proper clearance for a socket which supports a lamp which illuminates the license plate which is supported by a bracket 16, and shines also through a red lens 17 to provide the usual tail light when the lamp is in usel with a motor vehicle. The license carrying bracket 16 has upwardly extending arms 18 which straddle the neck 12, and are provided with four holes so spaced that the screws 11 hereinbefore mentioned extend through them; the screws thus serving to fasten the license bracket 16, the external casing 6 and the base 10 together into a unitary structure. i
Arranged inside theshell 6 are two subi stantially parallel vertical partitions 19 having each a marginal flange 20 a straight portion of which lies in the plane of the open side 7 of the casing, and the rest of which is so shaped as to vfit close to the inner surface of the casing; and whereby the interior of thev casing is divided into three lamp chambers the middle one of which contains the tail lamp 15 and the side ones of which house one a lbacking light 21 which vshines through a clear glass lens 22 when the vehicle moves backward, and the other 'a stop lamp 23 which illuminates a transparent stop signal 24 when the vehicle is slowed down for any reason. The partitions 19 have sockets 25 whereby the lamps 21 and 23 are supported and the axes of which sockets extend perpendicular to the partitions, 'and parallelwith the longer dimensionof the case and lamp structure regarded as a whole; and said partitions are fastened to the vertical side flanges 13 of the base 10 by rivets 26 as shown. n
The tail lamp 15 is supported by a socket 261 which is fastened to the end wall of the casing 6 and light therefrom shines through a curved transparent window 27 of olear glass to illuminate the license plate, said window being entirely inside the casing and held in place over the opening 9, and against marginal stops 28 integral with the casing 6, by lugs 29 which extend from the lower portions of theperipheral flanges 2O of thc partitions 19.
The'sockets whereby the lamps 15, 21 and 23 are supported are grounded, and current is supplied to said lamps through terminals 30, 31 and 32 extending through passages in a block of insulating material 33 contained within the tubular neck portion 12, whereby the lamp structure in its entirety is supported by means not shown; said terminals having spring arms 34, 35 and 36 which press against the central insulated terminals of the several lamps. The bleek 33 has longitudinally extending groove 37 to position it properly so that the several sprl g 'terminals will be in positions to 'the central terminals of the several. lamps, and said block is held in proper pesi'tion'within the tubular neck 12 by a set screw 38 the inner end of which enters said groove.
The lenses 17, 22 and 24 are all supported in openings formed in a cover plate 39 which Y forms a closure for the open side of the casing 6, and which fits close against the vertical portions of the flanges 2() of the partitions 19 to thereby prevent leakage of light rays from 'one lamp compartment to another of the caslng; said plate having a marginal flange 40 which overlies the free edge of the casing -about the opening 7. The lenses abut against shoulders 41 in the openings provided for them and are held in place within their several openings by expansible split rings 42 of wire, lying within grooves 43, one in each opening. The cover plate 39 is heldin place b v four screws 44 eX- tending through holes therein and the inner ends of which enter threaded lugs 45 fastened` inside the casing 6 adjacent the open side thereof; so that the plate and the lenses carried thereby may be readily removed as a unit when it becomes necessary to replace burned out lamps or broken lenses, or when for any other reason it becomes necessary to gain access to the interior of the lamp structure.
rlhe inner surface of the casing 6, and the surfaces of the partitions 19 and the inner surface of the base 10 are ordinarily coatedY with white enamel, or otherwise treated to make them good reflectors of the light rays emanating from the several lamps.
Having thus described my invention and explained the operation thereof l claim and desire to secure by Letters Patent: l 1. ln a lamp of the class described` an oblong hollowcasing open along one side: a sup-porting bracket having a subtantially rectangular base portion located within said casing, and a tubular portion extending from said base through an opening in the casing wall; two partitions located within said casing and arranged substantially perpendicular to the longer axis of said casing, and which partitions are fastened to opposite edges of said base portion and serve todivide the interior of said casing into three lamp compartments; lamp sockets carried one by each of said partitions and adapted to support lanips in the outside lamp compartments: a
lamp socket adapted to support a. lamp in the middle lamp compartment; suppl)r conductors extending through the tubular portion aforesaid of said supporting bracket and through which electricity is supplied to lamps supported by said several lamp sockets; transparent lenses associated one with each of said lamp compartments: 'and means for supporting said lenses substanly in the plane of the open side of said h ln lamp of the class described, an oblong hollow casing along side;
' tion extending through a supporting bracket having a substantially rectangular base portion located Within said casing, anda tubular portion extending from said base through an opening inthe casing wall; two. partitions located within said casing and arranged substantially perpendicuthree supply terminals extending through passages in a block of insulating material contained within the tubular portion aforef said of said supporting bracket; three spring arms carried one by each of said terminals, and which arms are located within the central one of said lamp compartments, and
through which arms electricity is supplied,
to lamps supported by said several' lamp sockets; transparent lenses associated one with each of said lamp compartments; and means for supporting said lenses ysubstantially in the plane of the open side of said casing.
3. In a lamp of the class described, an oblonghollow casing the interior of which is divided in'to three lamp compartments having each a lamp arranged to shine through lenses associated one with each compartment, and the central one of which compartments is provided with a bottom opening; a supporting bracket having a base portion arranged inside the casing, and
anopening-in the wall of the casing; a, license supporting bracket adaptedto support a license in position to be illuminated by light shining through the bottom opening aforesaid; fastening members extending through holes in said base portion, in the casingwall and in said license supporting bracket, to thereby fasten said parts t gether; land means port a tubular por--l extendingthrough the tubular ortion of said supporting bracket. for supplying electricity to lamps located one within each of saidlamp compartments.
'4. In a lamp of the class described, a hollow casing open along one side; twopartitions located within 'said casing and whereby the interior thereof is divided into three lamp compartments; a cover plate closing the open side of said casi-ng and having three openingstherein, one associated witheach lamp compartment; lenses secured one in each of said openings;a centrally arranged tubular support for supporting said casing; lamps located one within each of said lamp compartments; a block of insulating material arranged within said tubular support; and current supplying conductors extending through said block -of insulating material and into the middle'one of said compartments for supplying electricity to said sev- ,eral lamps. v Y
' 5. In a lamp of the class described, a hollow casing open along one side, and havlng also a Centrally arranged openmg 1n its bottom wall; two partltions located wlthin said casing one upon each side of said bottom opening; whereby the interior of said casing is divided into three lamp compartments; a cover plate closing the open side of said casing and having three openings therein, one associated with each lamp compartment; lenses secured one in each of said openings; a transparent window inside said opening; a centrally arranged tubular ,supfor supporting said casing; lamps located one within each of said lamp compartf ments;- a block of insulating material arranged within said tubular support; and current supplying conductors extending through said block of insulating material and into the middle one of said compartments for supplying electricity to said several lamps.
In testimony whereof I aiiix my signature.
casing and extending across said bottom